Water vapor sorption properties of TEMPO oxidized and sulfuric acid treated cellulose nanocrystal films
作者：
Guo, Xin;Liu, Liu;Hu, Yunchu;Wu, Yiqiang*
期刊：
Carbohydrate Polymers ,2018年197:524-530 ISSN：0144-8617
通讯作者：
Wu, Yiqiang
作者机构：
[Wu, Yiqiang; Liu, Liu; Guo, Xin] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Hu, Yunchu; Guo, Xin] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Cellulose nanocrystal;Equilibrium moisture content;Relative humidity;Sorption hysteresis;Sorption kinetics
摘要：
For cellulose nanocrystal film, water adsorption is extremely important for its product performance. For gaining a deeper understanding of hygroscopic behavior, two cellulose nanocrystal films, such as TEMPO oxidized cellulose nanocrystal film (TOCNF) and sulfuric acid treated cellulose nanocrystal film (SACNF) were investigated using dynamic water vapor sorption apparatus. During the water vapor sorption process, the running time, real-time sample mass, target relative humidity (RH), actual RH and real-time temperature were all collected. Through the comparison of these collected data, significant differences in the equilibrium moisture content, sorption hysteresis and sorption kinetics were confirmed. It was important to note that TOCNF and SACNF had equilibrium moisture contents of 28.2% and 22.8, respectively, at a RH of 95%. Then, using parallel exponential kinetics (PEK) model, sorption kinetics data were accurately fitted. Furthermore, two Kelvin-Voigt elements were introduced to interpret the fitting results and calculate the modulus of TOCNF and SACNF. © 2018 Elsevier Ltd
语种：
英文
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One-step approach to prepare superhydrophobic wood with enhanced mechanical and chemical durability: Driving of alkali
作者：
Jia, Shanshan;Chen, Haibo;Luo, Sha;Qing, Yan* ;Deng, Songlin;...
期刊：
Applied Surface Science ,2018年455:115-122 ISSN：0169-4332
通讯作者：
Qing, Yan;Wu, Yiqiang
作者机构：
[Qing, Yan; Wu, Yiqiang; Deng, Songlin; Chen, Haibo; Yan, Ning; Luo, Sha; Jia, Shanshan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Qing, Yan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Qing, Yan] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Harbin 150040, Heilongjiang, Peoples R China.;[Yan, Ning] Univ Toronto, Fac Forestry, Toronto, ON M5S 3B3, Canada.
通讯机构：
[Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Alkali-driven method;Chemical durability;Mechanical durability;Superhydrophobic wood
摘要：
Practical application of superhydrophobic wood remain a great challenge because of their poor durability and complicated production procedures. In this work, high-wear-resistance superhydrophobic wood was prepared by a facile, alkali-driven method using SiO 2 nanoparticles (NPs) and vinyltriethoxysilane (VTES). The obtained wood had a contact angle (CA) of 156.6° and a sliding angle (SA) of 1.8°. It also exhibited a high tolerance to harsh mechanical damages such as sandpaper abrasion. The mechanical durability of material was intelligently controlled by tuning the amount of alkali. The results showed that the wood prepared using 24 mL of sodium hydroxide solution (0.1 mol/L) retained its original superhydrophobicity over an abrasion length of 270 cm, whereas that treated with the solution containing 6 mL of sodium hydroxide solution could only resist an abrasion length of 60 cm. Further examinations showed that the alkali treatment provides more hydroxyl groups on the wood surface. These hydroxyl groups readily catch hydrophobic SiO 2 NPs, forming a rough hierarchical structure that supported by SiO 2 NPs and micropores. The presence of the alkali ensures abundant SiO 2 NPs anchoring on the wood substrate via chemical bonding, which contributes to the formation of a superhydrophobic coating with sufficient thickness and high bonding strength in support of mechanical stability. © 2018 Elsevier B.V.
语种：
英文
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Preparation and characterization of straw/magnesium cement composites with high-strength and fire-retardant
作者：
Xiao, Junhua;Zuo, Yingfeng* ;Li, Ping;Wang, Jian;Wu, Yiqiang*
期刊：
Journal of Adhesion Science and Technology ,2018年32(13):1437-1451 ISSN：0169-4243
通讯作者：
Zuo, Yingfeng;Wu, Yiqiang
作者机构：
[Xiao, Junhua; Wang, Jian; Wu, Yiqiang; Zuo, YF; Zuo, Yingfeng; Li, Ping] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.;[Wu, Yiqiang; Zuo, YF; Zuo, Yingfeng] Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha, Hunan, Peoples R China.
通讯机构：
[Zuo, YF; Wu, YQ] C;[Zuo, YF; Wu, YQ] H;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.;Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha, Hunan, Peoples R China.
关键词：
Straw/magnesium cement composites;glass fiber;flame-retardant;smoke-suppression;thermal stability;dimensional stability
摘要：
To fully exploit the abundant bioresource crop straw, a straw-based composite with excellent fire retardant, high strength and dimensional stability was successfully prepared for use in building applications. The subject composite was composed of rice straw/magnesium cement (SMC) adhesive, with glass fiber as a reinforcement agent. The mechanical strength, dimensional stability, flame retardant, smoke suppression, and thermal stability of the material were used to evaluate its performance as a potential construction material. The effect of the addition of glass fiber and the pavement structure of straw and glass fiber were also characterized. The experimental results showed that the mechanical strength and rigidity of SMC composite were increased by the addition of 9% glass fiber to the total mass of the filler. Glass fibers reinforced and reduced the volume of the filler, while increasing the dimensional stability of the composites. The strength of the mixed structural composites was higher than layered structural composites, which is benefits the preparation of the composites. Compared to other straw/cement composites, glass-fiber reinforced SMC composites exhibited better strength, dimensional stability, flame retardant, smoke suppression and thermal stability. These superb properties make these novel composites an ideal candidate for use in the field of interior decoration, particularly in public venues.<br/> ©2017 Informa UK Limited, trading as Taylor & Francis Group.
语种：
英文
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Hydrolysis and recycling of urea formaldehyde resin residues
作者：
Liu, Ming;Wang, Yan;Wu, Yiqiang;Wan, Hui*
期刊：
Journal of Hazardous Materials ,2018年355:96-103 ISSN：0304-3894
通讯作者：
Wan, Hui
作者机构：
[Liu, Ming; Wan, Hui; Wang, Yan] Mississippi State Univ, Coll Forest Resources, Dept Sustainable Bioprod, Mississippi State, MS 39762 USA.;[Liu, Ming; Wu, Yiqiang] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wan, Hui] M;Mississippi State Univ, Coll Forest Resources, Dept Sustainable Bioprod, Mississippi State, MS 39762 USA.
关键词：
Hazardous waste;Hydrolysis;Recycle;Urea formaldehyde resin
摘要：
Urea formaldehyde (UF) resin residues generate many poisonous chemicals during traditional disposal technologies for organic hazardous wastes. In this study, hydrothermal hydrolysis was developed to decompose, remove, and recycle cured UF resin. Under 140 °C and 2 h of hydrothermal process, 20 mL of either 2 M HCl or 30 w.t. % of formaldehyde solutions can decompose as much as 1.7 g of cured UF resin. In addition, from the attenuated total reflection Fourier-transform infrared spectroscopy (ATR-FTIR), gas chromatography–mass spectroscopy (GC–MS), X-ray diffraction (XRD), and<sup>1</sup>H nuclear magnetic resonance (NMR) analyses, it confirmed that the hydrothermal hydrolysis could hydrolyze cured UF resin. With 2 M HCl, the hydrolysis of cured UF resin can form NH<inf>4</inf>Cl as the final product. Moreover, formaldehyde solution hydrolysis can fully recycle the decomposed UF resin. The hydrolyzed formaldehyde solution can be directly used as a normal formaldehyde solution for UF resin synthesis. The synthesized resin, which contains about 6 w.t. % of decomposed cured UF resin, has similar chemical structures and bonding performance as normal UF resin. These hydrolysis methods generate no harmful gases and pollutants, nor any pre- or post-treatments, which proves its feasibility in UF resin residues safe removal or disposal and recycle.<br/> ©2018 Elsevier B.V.
语种：
英文
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Multifunctional chiral nematic cellulose nanocrystals/glycerol structural colored nanocomposites for intelligent responsive films, photonic inks and iridescent coatings
作者：
Xu, Mingcong;Li, Wei* ;Ma, Chunhui;Yu, Haipeng;Wu, Yiqiang;...
期刊：
Journal of Materials Chemistry C ,2018年6(20):5391-5400 ISSN：2050-7526
通讯作者：
Li, Wei;Liu, Shouxin
作者机构：
[Xu, Mingcong; Yu, Haipeng; Ma, Chunhui; Liu, Shouxin; Wang, Yonggui; Li, Wei; Chen, Zhijun; Li, Jian; Li, W; Liu, SX] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Hexing Rd 26, Harbin 150040, Heilongjiang, Peoples R China.;[Wu, Yiqiang] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Hunan Prov Collaborat Innovat, Ctr High Efficiency Utilizat Wood & Bamboo Resour, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Li, W; Liu, SX] N;Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Hexing Rd 26, Harbin 150040, Heilongjiang, Peoples R China.
摘要：
Structural colored nanocomposites with photonic liquid crystal structures are desirable owing to their excellent optical performances, unique structural features and intelligent responsive behaviors. Herein, a series of cellulose nanocrystal (CNC)-based nanocomposite materials that mimic the cholesteric structural colored creatures in nature were prepared and their functional applications investigated. Multicolored, flexible and intelligent responsive iridescent films were constructed by mixing cellulose nanocrystals (CNCs) and glycerol (Gly) in different ratios. Consequently, redshifted structural colors were obtained from the increase in the helical pitch of the chiral nematic structures according to the microstructure analysis. In addition to improving the mechanical properties of the composite films, glycerol also promoted the crystallinity of the films to different degrees. The CNC/Gly20 films exhibited reversible reflection colors at different relative humidity because of the strong water absorption capability of glycerol. Furthermore, CNC/Gly composite suspensions were used as photonic inks to obtain photonic writing with unique fingerprint textures. Moreover, the CNC/Gly nanocomposites were also used to make iridescent coatings on different substrates. The incorporation of glycerol improved the compatibility between the interfaces. Thus, photonic nanocomposites from cellulose nanocrystals can potentially be developed as optical sensors, security markings and functional coatings.
语种：
英文
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秸秆/氯氧镁水泥无机轻质复合材料制备与性能
作者：
王健;肖俊华;左迎峰;关鹏飞;李文豪;...
期刊：
复合材料学报 ,2018年35(11):3162-3171 ISSN：1000-3851
通讯作者：
Zuo, Yingfeng(zuoyf1986@163.com)
作者机构：
[王健; 肖俊华; 左迎峰; 关鹏飞; 李文豪; 吴义强] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha;410004, China;[王健; 肖俊华; 左迎峰; 关鹏飞; 李文豪; 吴义强] 410004, China
通讯机构：
[Zuo, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
关键词：
氯氧镁水泥;轻质复合材料;秸秆尺寸;秸秆添加量;界面情况
摘要：
以氯氧镁水泥（MOC）为主料,H2O2为发泡剂,MnO2为激发剂,硬脂酸钙为稳泡剂,聚丙烯酰胺为增稠剂,添加稻秸秆,制备出秸秆/MOC无机轻质复合材料。探讨了秸秆尺寸和添加量对秸秆在浆料中的分散性及对秸秆/MOC复合材料力学强度、韧性、抗裂性、吸水性的影响规律。结果表明,秸秆尺寸和添加量对秸秆在浆料中的分散性、强度有较大影响,当秸秆尺寸≤250μm、秸秆与MOC的质量比为0.9%时,秸秆分散性最好,制得秸秆/MOC复合材料的压缩强度（11.26MPa）、弯曲强度（3.97MPa）最大,抗裂性最佳。SEM分析表明,未经处理的秸秆与基体间的胶结状况差,存在弱界面层,当掺入秸秆尺寸过大或添加量过多时,秸秆/MOC复合材料中单位体积内被引入了较多的弱界面胶合部分,进而影响了复合材料的整体性能。
语种：
中文
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Cellulose nanofibrils anchored Ag on graphitic carbon nitride for efficient photocatalysis under visible light
作者：
Tian, Cuihua;Tao, Xu;Luo, Sha;Qing, Yan* ;Lu, Xihong;...
期刊：
Environmental Science: Nano ,2018年5(9):2129-2143 ISSN：2051-8153
通讯作者：
Qing, Yan;Wu, Yiqiang
作者机构：
[Tao, Xu; Qing, Yan; Wu, Yiqiang; Tian, Cuihua; Luo, Sha; She, Jiarong] Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Qing, Yan; Wu, Yiqiang] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, MOE, KLGHEI Environm & Energy Chem,Key Lab Bioinorgan, Guangzhou 510275, Guangdong, Peoples R China.
通讯机构：
[Qing, Y; Wu, YQ] C;Cent South Univ Forestry & Technol, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.
摘要：
Although polymeric graphitic carbon nitride (CN) is considered an appealing metal-free photocatalyst for energy conversion and environmental remediation, its application still faces challenges owing to its limited photocatalytic activity under visible light irradiation. Herein, we prepared an efficient doped CN photocatalyst using sustainable cellulose nanofibrils (CNFs) to anchor Ag onto CN. The carbon originating from CNFs was doped successfully, which in consequence enhanced the visible light absorption of CN significantly. Furthermore, the carboxyls and hydroxyls exposed on the CNF surface, as well as the intrinsic entangled network of CNFs, provided more Ag chemically and physically anchored on the resultant CN framework. The Ag amount of Ag/CCN-4 (doped with CNF and 0.04 g of AgNO3) increased significantly, which was about 2 times higher than that of Ag/CN (doped with only AgNO3), and the band gap was narrowed to 2.30 eV. As a result, rhodamine B (RhB) and tetracycline (TC) were efficiently degraded under visible light, and the photodegradation rate constant of RhB reached 0.12695 min-1, whereas that of Ag/CN and CN was 0.06956 and 0.04892 min-1, respectively. The possible mechanism was summarized. Benefiting from the relatively higher specific surface area, carbon doping and Ag anchoring, Ag/CCN-4 exhibited excellent photocatalytic activity, and this work provides a simple and efficient strategy for fabricating high-performance CN photocatalysts for the removal of pollutants. © 2018 The Royal Society of Chemistry.
语种：
英文
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陈设艺术与现代居住空间的关系探究
作者：
李萍;吴义强;左迎峰
期刊：
家具与室内装饰 ,2018年(08):118-119 ISSN：1006-8260
作者机构：
湘南学院美术与设计学院,湖南郴州,423000;中南林业科技大学材料科学与工程学院,湖南长沙,410004;[吴义强; 左迎峰] 中南林业科技大学;[李萍] 湘南学院
关键词：
陈设艺术;居住空间;室内设计;关系探究
摘要：
陈设艺术是设计出理想环境的艺术;本文从现代人对居住空间室内设计的艺术境界、舒适度、品位的高要求为切入点,分别从陈设艺术与现代居住空间在设计目的、设计语言、设计形式上的统一,陈设艺术在空间和时间上对现代居住空间设计的延续,陈设艺术赋予了现代居住空间主题性、时代性、地域性的新涵义三个方面对两者的关系进行了具体分析,指出陈设艺术与现代居住空间相辅相成、不可分割.
语种：
中文
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浸渍后处理及干燥处理对木材树脂浸渍改性效果的影响
作者：
徐康;吕建雄;刘君良;吴义强;李贤军
期刊：
林业科学 ,2018年54(4):84-92 ISSN：1001-7488
通讯作者：
Lü, J.
作者机构：
[徐康; 吕建雄; 刘君良] 中国林业科学研究院木材工业研究所;[徐康] 浙江省林业科学研究院;[吕建雄; 吴义强; 李贤军] 中南林业科技大学材料科学与工程学院;[吕建雄; 吴义强; 李贤军] 中南林业科技大学
关键词：
低分子质量树脂;扩散;水溶性;增重率;尺寸稳定性
摘要：
【目的】探讨不同浸渍后处理方式和干燥方式对MUF树脂浸渍材增重率和尺寸稳定性的影响,为树脂浸渍改性技术提供参考和借鉴。【方法】利用5%、10%、15%和25%浓度的MUF树脂真空加压浸渍毛白杨木材,每种浓度树脂浸渍后试样首先分别进行4种方式浸渍后处理(气干处理7天、高湿度环境中平衡处理7天、树脂溶液中平衡处理7天以及不进行气干或平衡处理) ,然后分别利用2种干燥方式(直接干燥和湿干燥)进行干燥处理,干燥处理后测量不同处理条件下树脂浸渍材的增重率和容胀率,最后将素材和树脂浸渍材置于蒸馏水中常压浸渍14天,测试树脂浸渍材的抗胀率和径弦向差异湿胀程度。【结果】木材增重率与树脂浓度呈正相关关系,4种浓度树脂浸渍后试样增重率分别为9.7%、19.1%、28.4%和50.0%;不同浸渍后处理试样间的增重率差别不大;相同浸渍后处理条件下,直接干燥试样的增重率略低于湿干燥试样的增重率。树脂浸渍后,置于高湿度环境或树脂溶液中处理的试样,细胞壁容胀率较高;相同浸渍后处理条件下(除气干处理外) ,直接干燥试样的细胞壁容胀率低于湿干燥试样的细胞壁容胀率。树脂浸渍材抗胀率的变化规律与其细胞壁容胀率的变化规律基本一致。随着增重率增加,树脂浸渍材的径弦向湿胀率均降低,而其径弦向差异湿胀程度呈增加趋势,低增重率时试样的径弦向差异湿胀程度低于素材,而增重率超过30%左右时试样的径弦向差异湿胀程度高于素材。【结论】1)相同浓度树脂浸渍条件下,干燥方式对增重率的影响大于浸渍后处理方式,湿干燥处理有利于树脂在木材内部良好固着,从而获得更高的增重率; 2)细胞壁容胀率受浸渍后处理方式和干燥方式二者的共同影响,置于高湿度环境或树脂溶液中的浸渍后处理有利于树脂继续扩散到木材细胞壁,湿干燥处理有利于树脂进一步扩散到木材细胞壁中并良好固着,从而对细胞壁产生更好的容胀效应; 3)树脂浸渍材的抗胀率与细胞壁容胀率密切相关,树脂对细胞壁的容胀是树脂浸渍材尺寸稳定性提高的前提; 4)树脂浸渍材的径弦向差异湿胀程度随增重率增加而有所增加。
语种：
中文
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A high-performance, all-textile and spirally wound asymmetric supercapacitors based on core–sheath structured MnO2 nanoribbons and cotton-derived carbon cloth
作者：
Wan, Caichao* ;Jiao, Yue;Liang, Daxin;Wu, Yiqiang* ;Li, Jian*
期刊：
Electrochimica Acta ,2018年285:262-271 ISSN：0013-4686
通讯作者：
Wan, Caichao;Wu, Yiqiang;Li, Jian
作者机构：
[Wu, Yiqiang; Wan, CC; Wan, Caichao] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Liang, Daxin; Jiao, Yue; Li, Jian] Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Heilongjiang, Peoples R China.;[Li, Jian] Northeast Forestry Univ, Key Lab Biobased Mat Sci & Technol, Minist Educ, Harbin 150040, Heilongjiang, Peoples R China.
通讯机构：
[Wan, CC; Wu, YQ] C;[Li, Jian] N;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Northeast Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Heilongjiang, Peoples R China.
关键词：
Cotton;Carbon cloth;MnO2 nanoribbons;Core-sheath structure;Spirally wound supercapacitors;In-situ redox
摘要：
An increasing emphasis on green chemistry and high-efficient utilization of natural resources has raised more demands for more facile, rapid and cost-effective approaches for preparation of energy-storage equipment. Herein, we demonstrate a simple, fast and cheap approach to create a core–sheath structured textile electrode based on cotton-derived carbon cloth (CDCC, core) and MnO2 nanoribbons (sheath). A good interface bonding between the in-situ grown MnO2 and carbon fibers of CDCC aided electron transfer. The abundant MnO2 nanostructures increased electrochemically active areas accessed by electrolyte ions and the porous CDCC acted as an electrolyte reservoir to shorten ion-diffusion path and facilitate efficient infiltration of electrolyte ions. Because of these advantages, the MnO2/CDCC electrode exhibits a high areal specific capacitance of 202 mF cm−2. In addition, the flexible electrode was assembled into an all-textile and spirally wound asymmetric supercapacitor with an outstanding electrochemical activity, like a high areal energy density of 30.1 μW h cm−2 at 0.15 mW cm−2 and an excellent capacitance retention of 87.7% after 5000 cycles. Another meritorious contribution is the synthetic strategy realizing a more direct, eco-friendly and efficient utilization way of cellulose resource, which avoided pollutions from cellulose purification or pretreatment. © 2018 Elsevier Ltd
语种：
英文
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IN SITU visualization of water adsorption in cellulose nanofiber film with micrometer spatial resolution using micro-FTIR imaging
作者：
Guo, Xin;Wu, Yiqiang*
期刊：
Journal of Wood Chemistry and Technology ,2018年38(5):361-370 ISSN：0277-3813
通讯作者：
Wu, Yiqiang
作者机构：
[Wu, Yiqiang; Guo, Xin] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Cellulose nanofiber film;relative humidity;micro-FTIR images;adsorbed water distribution;water adsorption
摘要：
Hygroscopic behavior is an inherent characteristic of nanocellulose film which strongly affects its applications. In order to gain a better understanding of water adsorption, micro-Fourier transform infrared (FTIR) imaging was used to investigate the water adsorption in cellulose nanofiber film with a spatial resolution of 20 um. Four spectral peaks at 2905 cm−1, 1428 cm−1, 1371 cm−1, and 1317 cm−1 attributed to CH and CH2 groups were used to generate 2D micro-FTIR images of cellulose distribution, and the most intense peak at 3348 cm−1 was employed to generate 2D micro-FTIR image of OH group distribution. On this basis, difference 2D micro-FTIR images of OH group distribution at different relative humidity (RH) levels demonstrated the development of adsorbed water distribution in cellulose nanofiber film during the water adsorption process. The study results confirmed that the micro-FTIR imaging was one promising tool for in situ visualization of water adsorption with micron-scale resolution. © 2018, Copyright © Taylor & Francis Group, LLC.
语种：
英文
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木塑复合材料功能化改性研究进展
作者：
杨守禄;罗莎;章磊;姬宁;李丹;...
期刊：
材料导报 ,2018年32(9):3090-3098 ISSN：1005-023X
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[杨守禄; 姬宁; 李丹] Guizhou Academy of Forestry, Guiyang;550005, China;[罗莎; 章磊; 吴义强] School of Materials Science and Engineering, Central South University of Forestry & Technology, Changsha;410004, China;[杨守禄] 550005, China<&wdkj&>School of Materials Science and Engineering, Central South University of Forestry & Technology, Changsha
通讯机构：
[Wu, Y.] S;School of Materials Science and Engineering, Central South University of Forestry & Technology, Changsha, China
关键词：
木塑复合材料;阻燃抑烟;耐老化耐候;抗菌;功能化改性
摘要：
木塑复合材料(WPC)是采用木质材料和塑料加工制备而成的一种绿色、环境友好新型材料,具有强度高、力学性能好、可循环使用及成本低等优势,被广泛应用于建筑材料、室内装饰材料、包装及运输材料和文化体育等领域。WPC不仅解决了废弃木质纤维材料综合利用率低及处理废弃木质纤维材料带来的环境污染等问题,而且有助于缓解废旧塑料引发的“白色污染”等重大环境问题,是废弃木质纤维和废旧塑料再生利用的一个趋势,具有广阔的市场空间和应用前景,已成为当今木质材料和塑料加工领域的研究热点之一。然而,WPC中的木质材料和塑料都是易燃物质,且燃烧产生的烟易造成人员伤亡;WPC使用过程中容易受到自然环境的影响,显著降低其物理力学性能及耐久性能;同时,由于WPC中含有木质材料,使用过程中容易遭受微生物的侵袭和破坏,导致材料变质而影响使用,甚至危害人体健康。以上缺陷严重影响其使用范围和使用寿命。近年来,研究者们致力于改善WPC的阻燃抑烟、耐老化、耐候及抗菌性能,取得了显著的成果。在实现阻燃抑烟、耐老化、耐候和抗菌功能化WPC时应用较为广泛的方法包括添加改性剂、对木质材料或塑料基体进行预处理、对WPC表面进行改性处理等。由于添加改性剂和对WPC进行表面处理具有操作简单、成本低等优势,已成为实现WPC功能化最常用的方法,可广泛用于WPC的加工。常用的阻燃抑烟剂包括聚磷酸胺(APP)、次磷酸铝(AHP)、纳米金属化合物、金属氢氧化物及含氮磷化合物等,耐老化剂、耐候剂包括受阻胺光稳定剂、紫外吸收剂、紫外线稳定剂及颜料等,抗菌剂包括纳米二氧化钛、纳米粘土、硼酸锌等。WPC表面改性处理主要是表面涂刷功能性涂料或接枝功能性试剂。目前,WPC的功能化研究集中于单一功能的增强,多功能的WPC有待进一步研究。 WPC功能化改性是拓宽其应用范围、延长使用寿命和提高安全使用性能的关键。本文综述了WPC阻燃抑烟改性、耐老化和耐候改性及抗菌改性等功能化改性的研究进展,介绍了WPC的阻燃抑烟、耐老化、耐候及抗菌性能等功能表征手段,并对其发展趋势进行了展望,提出了WPC功能化改性亟待解决的难题。
语种：
中文
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Recent Progress in Flexible Fibrous Batteries
作者：
Xi, Zhaowei;Zhang, Xiang;Ma, Yuansheng;Zhou, Cui;Yang, Jing;...
期刊：
ChemElectroChem ,2018年5(21):3127-3137 ISSN：2196-0216
通讯作者：
Luo, Yongfeng;Chen, Daoyong
作者机构：
[Zhou, Cui; Luo, Yongfeng; Chen, Daoyong; Xi, Zhaowei; Wu, Yiqiang; Ma, Yuansheng; Yang, Jing; Li, Xianjun; Zhang, Xiang] Cent South Univ Forestry & Technol, Mat Sci & Engn Sch, Coll Sci, Changsha 410004, Hunan, Peoples R China.;[Xi, Zhaowei; Luo, Yongfeng] Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China.;[Luo, Yongfeng; Chen, Daoyong] Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China.
通讯机构：
[Luo, YF; Chen, DY] C;[Luo, Yongfeng; Luo, YF; Chen, DY] F;Cent South Univ Forestry & Technol, Mat Sci & Engn Sch, Coll Sci, Changsha 410004, Hunan, Peoples R China.;Foshan Univ, Sch Mat Sci & Energy Engn, Foshan 528000, Guangdong, Peoples R China.;Fudan Univ, Dept Macromol Sci, State Key Lab Mol Engn Polymers, Shanghai 200433, Peoples R China.
关键词：
flexible fibrous batteries;lithium-ion batteries;metal-air batteries;lithium-sulfur batteries;wearable devices
摘要：
Flexible fibrous batteries have attracted unprecedented attention, owing to the development of wearable electronic devices, which have the advantages of flexibility, weavability, and miniaturization compared with conventional bulky batteries. In this Minireview, we summarize the latest developments in flexible fibrous batteries, including lithium-ion batteries, lithium–sulfur batteries, sodium-ion batteries, and so forth. We also discuss the future directions and challenges of flexible fibrous batteries. © 2018 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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木塑复合材料在绿色建筑中的应用
作者：
杨守禄;黄安香;章磊;李丹;吴义强;...
期刊：
工程塑料应用 ,2018年46(1):123-127 ISSN：1001-3539
作者机构：
贵州省林业科学研究院, 贵阳, 550005;中南林业科技大学材料科学与工程学院, 长沙, 410004;贵州剑河园方林业投资开发有限公司, 贵州, 剑河, 556400;[杨守禄] 贵州省林业科学研究院, 贵阳, 550005 中南林业科技大学材料科学与工程学院, 长沙, 410004;[黄安香; 李丹; 姬宁] 贵州省林业科学研究院, 贵阳, 550005
关键词：
木塑复合材料;绿色建筑;建筑模板;地板;墙板;家具;应用
摘要：
对木塑复合材料(WPC)在建筑模板、地板、墙板和家具等绿色建筑领域的应用现状进行综述。同时,总结了WPC的相关指标及检验检测标准,为开发制备具有更加优秀品质的功能化WPC提供依据。WPC符合国家政策和发展规划,在绿色建筑领域具有巨大的潜在市场和广阔的应用前景。
语种：
中文
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Fe3O4 nanoparticles embedded in cellulose nanofibre/graphite carbon hybrid aerogels as advanced negative electrodes for flexible asymmetric supercapacitors
作者：
Xia, Liaoyuan;Li, Xiangling;Wu, Xian;Huang, Le;Liao, Yu;...
期刊：
Journal of Materials Chemistry A ,2018年6(36):17378-17388 ISSN：2050-7488
通讯作者：
Wu, Yiqiang;Lu, Xihong
作者机构：
[Huang, Le; Wu, Xian; Wu, Yiqiang; Liao, Yu; Xia, Liaoyuan; Li, Xiangling; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Lu, Xihong] Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.;[Lu, Xihong] Xian Univ Technol, Inst Adv Electrochem Energy, Xian 710048, Shaanxi, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;[Lu, Xihong] S;[Lu, Xihong] X;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Sun Yat Sen Univ, Sch Chem, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.
摘要：
Fe 3 O 4 is a negative electrode material with great development potential, but it remains a challenge for Fe 3 O 4 -based negative electrodes to attain excellent electrochemical performance and stability simultaneously with good flexibility, which limits their practical applications in high-performance flexible asymmetric supercapacitors (ASCs). In this study, a simple and scalable bottom-up strategy is presented to prepare three-dimensional (3D) porous CNF/MWCNT/GO-hybrid aerogels (HAs) based on one-dimensional (1D) cellulose nanofibers (CNFs) and multiwalled carbon nanotubes (MWCNTs) and two-dimensional (2D) graphene oxide (GO). After in situ embedding of Fe 3 O 4 nanoparticles (∼200 nm) into the HA substrate, a high-performance flexible CNF/MWCNT/reduced-GO (RGO)/Fe 3 O 4 electrode with a large capacitance of 1193 mF cm -2 and excellent rate capability as well as high durability has been synthesized. Moreover, when using this CNF/MWCNT/RGO/Fe 3 O 4 as a negative electrode, the as-fabricated flexible ASC device exhibited a significant capacitance and energy density of 5.82 F cm -3 and 2.35 mW h cm -3 , respectively. In addition, the flexible ASC device retained more than 94.7% of its initial capacitance after 5000 charge-discharge cycles. These results indicate that the proposed strategy can provide new opportunities for researchers to rationally design and prepare flexible ASC negative electrode materials with excellent capacitive properties, which will extend the application of such materials to the domain of portable and wearable electronics. © 2018 The Royal Society of Chemistry.
语种：
英文
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Preparation and characterization of polylactic acid-g-bamboo fiber based on in-situ solid phase polymerization
作者：
Zuo, Yingfeng;Li, Wenhao;Li, Ping;Liu, Wenjie;Li, Xingong;...
期刊：
Industrial Crops and Products ,2018年123:646-653 ISSN：0926-6690
通讯作者：
Wu, Yiqiang
作者机构：
[Li, Xingong; Wu, Yiqiang; Li, Wenhao; Zuo, Yingfeng; Li, Ping; Liu, Wenjie] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Li, Xingong; Wu, Yiqiang; Zuo, Yingfeng] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
bamboo fiber;hydrophobicity;in-situ solid phase polymerization;interfacial compatibility;polylactic acid
摘要：
This study details effort to improve the interfacial compatibility of bamboo fiber/polylactic acid composites, by attaching the molecular chain of polylactic acid (PLA) to bamboo fibers (BF). The BF was pretreated using a 1 wt% sodium hydroxide solution and the lactic acid was then grafted onto BFs using in-situ solid phase polymerization. The prepared PLA grafted BF (PLA-g-BF) was characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), the results confirmed that the grafting reaction occurred successful. The grafting ratio of the PLA-g-BF was 16.51% and the degree of substitution was 35.59%. The effect of reaction temperature and time on the degree of substitution of the PLA-g-BF was studied. The results showed that a reaction temperature of 80 °C and a reaction time of 7 h were the optimum conditions. The hydrophobicity, surface morphology, crystal structure, thermal properties and tensile properties of the PLA-g-BF were characterized. The results demonstrated that the surface and interior of BF were covered with PLA. The crystalline structure of the BF was somewhat damaged, which decreased its crystallinity and tensile strength. The grafting reaction improved the thermoplasticity and thermogravimetric performance of the PLA-g-BF. Moreover, the hydrophobicity of the PLA-g-BF was significantly increased. © 2018 Elsevier B.V.
语种：
英文
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悬铃木树皮美学图案分析及应用研究
作者：
孟陶陶;吴义强;罗建举
期刊：
林业工程学报 ,2018年3(1):141-147 ISSN：2096-1359
作者机构：
中南林业科技大学材料科学与工程学院,长沙,410004;广西大学林学院,南宁,530004;[罗建举] 广西大学;[吴义强; 孟陶陶] 中南林业科技大学
关键词：
悬铃木;树皮特征;木材美学;产品设计
摘要：
悬铃木生长快、树形优美,多用作行道和园林绿化树种。开展悬铃木树皮美学属性的研究,以进一步发掘其美学利用价值。该研究从美学角度分析了不同树龄时期悬铃木树皮的美学特征,采用不同的构图方式创作出多种形式的美学图案,并将这些美学图案应用于服装、皮包、家具等产品的研发设计,获得3种悬铃木树皮美学应用的设计作品。研究结果表明,不同时期的悬铃木树皮外观特征存在较大差异:幼龄期树皮表面平滑,均匀分布着由皮孔与树皮射线形成的灰白色斑点;老龄期树皮多为黄褐色,呈碎裂状条片层叠堆积。这两个时期的树皮图形单调,美学利用价值较低。成熟期的树皮多为绿褐色,凹凸不平的不规则形斑块构成丰富多变的图形,色彩丰富、层次分明、肌理粗犷朴实、构型奇异多样、线条流畅自然,是点、线、面的完美组合,具有很好的审美价值,可以作为美学素材应用于日用产品的美学设计。
语种：
中文
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竹纤维/聚乳酸可降解复合材料的增塑改性
作者：
左迎峰;李文豪;李萍;赵星;李新功;...
期刊：
林业工程学报 ,2018年3(1):77-82 ISSN：2096-1359
作者机构：
中南林业科技大学材料科学与工程学院,长沙,410004;[赵星; 李文豪; 吴义强; 李新功; 李萍; 左迎峰] 中南林业科技大学
关键词：
竹纤维;聚乳酸;复合增塑;界面相容性;机械性能;耐水性能
摘要：
以竹纤维和聚乳酸（PLA）为原料,乙二醇、甘油、聚乙二醇400、尿素、甲酰胺和柠檬酸酯为增塑剂,通过熔融共混法制备了竹纤维/PLA可降解复合材料。探讨了一元增塑、二元复合增塑和三元复合增塑对竹纤维/PLA复合材料拉伸强度、抗弯强度、断裂伸长率和耐水性能的影响。试验结果表明,不同增塑剂对竹纤维/PLA复合材料的增塑效果不同,甘油增塑复合材料的拉伸强度和抗弯强度最大,甲酰胺增塑复合材料的断裂伸长率最大,柠檬酸酯增塑复合材料的耐水性能最优。二元复合增塑具有协同增塑效果,甘油/柠檬酸脂复合增塑竹纤维/PLA复合材料的拉伸强度和抗弯强度最大,乙二醇/甲酰胺复合增塑竹纤维/PLA复合材料的断裂伸长率最大,乙二醇/柠檬酸酯复合增塑竹纤维/PLA复合材料的耐水性能最优。三元复合增塑在获得较好相容性的同时,复合材料的韧性明显提高,甘油/柠檬酸酯/乙二醇、甘油/柠檬酸脂/甲酰胺复合增塑竹纤维/PLA复合材料不仅具有较高的强度,且断裂伸长率和耐水性能均较好,优于一元和二元增塑效果。
语种：
中文
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淀粉/聚乳酸可生物降解复合材料相容界面构建研究进展
作者：
左迎峰;顾继友;张彦华;吴义强;何啸宇
期刊：
功能材料 ,2018年49(3):03054-03063,03069 ISSN：1001-9731
通讯作者：
Wu, Y.
作者机构：
[何啸宇; 左迎峰; 吴义强] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China;Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education Harbin, 150040, China;[张彦华; 顾继友] Key Laboratory of Bio-Based Material Science and Technology, Northeast Forestry University, Ministry of Education Harbin150040, China
通讯机构：
[Wu, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
淀粉;聚乳酸;可生物降解材料;相容界面;构建方法
摘要：
淀粉/聚乳酸(淀粉/PLA)可生物降解复合材料的开发能够缓解塑料工业对石油资源的依赖性和从根本上解决传统塑料所带来的“白色污染”问题。对淀粉与PLA之间的相容界面性进行构建,可以有效提高淀粉/ PLA复合材料的机械性能、耐水性能和熔融加工性能等。概述了淀粉/PLA的界面特性和构建机理,从淀粉塑化改性、增容剂改性、淀粉疏水改性和PLA亲水改性4个方面综述了淀粉/PLA复合材料相容界面构建进展。针对淀粉/PLA复合材料在构建方法和构建机理等方面研究的不足,提出了进一步开展研究的建议。
语种：
中文
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A Geologic Architecture System-Inspired Micro-/Nano-Heterostructure Design for High-Performance Energy Storage
作者：
Wan, Caichao* ;Jiao, Yue;Liang, Daxin;Wu, Yiqiang* ;Li, Jian*
期刊：
Advanced Energy Materials ,2018年8(33):1802388-null ISSN：1614-6832
通讯作者：
Wan, Caichao;Wu, Yiqiang;Li, Jian
作者机构：
[Wu, Yiqiang; Wan, CC; Wan, Caichao] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Liang, Daxin; Jiao, Yue; Li, Jian] Northwest Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Heilongjiang, Peoples R China.
通讯机构：
[Wan, CC; Wu, YQ] C;[Li, Jian] N;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;Northwest Forestry Univ, Mat Sci & Engn Coll, Harbin 150040, Heilongjiang, Peoples R China.
关键词：
functional materials;heterostructure;nature-inspired design;supercapacitors
摘要：
Nature-inspired strategies are extensively proposed as novel and effective routines to address challenges for eco-friendly and high-performance energy storage devices with high energy/power density and long cycling life. Inspired by synergistic functions and integrated form of a geologic architecture system (i.e., ground–mountain–vegetation), here a novel and hierarchical cellulose-supported Co@Co(OH)2 heterostructure based on a facile combined method of magnetron sputtering and electrooxidation is created. Thanks to the synergistic effects of this multiscale structure (i.e., the storage capacity of cellulose substrate (ground) for electrolyte ions, electron superhighway supplied by interlayered metallic Co (mountain), and ultrahigh electrochemical activity and mechanical stability of in situ grown and quasi-honeycomb Co(OH)2 (vegetation) with large surface area), the composite displays a high specific capacitance (642 mF cm−2/958 F g−1 at 2 mA cm−2), excellent rate performance, and outstanding cycling stability (only 2.1% loss after 10 000 cycles), which are significantly superior to those of other microstructure designs of Co(OH)2-based electrodes. Also, the assembled asymmetric supercapacitor exhibits highly competitive energy/power density (166 µW h cm−2 at 1.5 mW cm−2) and excellent cycling stability. Combined with the outstanding electrochemical properties, facile synthesis technology, environmental friendliness, and low cost, this ingenious nature-inspired composite holds great promise for green high-performance energy storage devices. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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