A facile and novel emulsion for efficient and convenient fabrication of durable superhydrophobic materials
作者：
Wu, Yiqiang;Jia, Shanshan;Wang, Shuang;Qing, Yan* ;Yan, Ning;...
期刊：
Chemical Engineering Journal ,2017年328:186-196 ISSN：1385-8947
通讯作者：
Qing, Yan
作者机构：
[Wu, Yiqiang; Meng, Taotao; Yan, Ning; Wang, Shuang; Wang, Qihang; Qing, Yan; 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.;[Yan, Ning] Univ Toronto, Fac Forestry, Toronto, ON M5S 3B3, Canada.
通讯机构：
[Qing, Yan] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Anti-fouling durability and stability;Emulsion;Resin anchor;Self-cleaning;Superhydrophobic surface
摘要：
There are significant challenges related to practical applications of superhydrophobic materials due to their limited durability, difficult processing conditions, and complicated synthesis procedures. In this study, a facile and novel emulsion composed of nanopartilcles (i.e. SiO2 or TiO2) and epoxy resin was synthesized to produce superhydrophobic surfaces using spraying, dipping and brushing methods, mimicking ordinary household paints. The obtained superhydrophobic materials had a water contact angle (CA) of ∼152° and a sliding angle (SA) of ∼6° at the room temperature. Interestingly, the emulsion demonstrated a great versatility for application in type of materials and application methods. The hierarchical surface structure fabricated by the emulsion was found to be independent of the substrate type and processing method, resulting in similar water repellent performance among all surfaces obtained. The superhydrophobic surfaces also exhibited excellent durability even after sustaining a series of mechanical damages including finger wiping, tape peeling and sandpaper abrasion. Moreover, they were able to maintain their superhydrophobic performance after immersion in aqueous solutions of pH ranging from 1 to 13 and boiling in water at 100°C. This study shows that the novel emulsion can be used to fabrication of superhydrophobic surfaces using a one-step method that is green, versatile, scalable and independent of operator skill, special equipment, and the type of substrate. It has an excellent promise for real life applications. © 2017 Elsevier B.V.
语种：
英文
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酸解氧化对双醛淀粉性能的影响
作者：
刘文杰;左迎峰;吴义强;肖俊华;朱颖;...
期刊：
材料导报 ,2017年31(4):41-45 ISSN：1005-023X
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[刘文杰; 左迎峰; 吴义强; 肖俊华; 朱颖; 赵星] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[刘文杰; 左迎峰; 吴义强; 肖俊华; 朱颖; 赵星] 410004, China
通讯机构：
[Wu, Y.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
玉米淀粉;酸解氧化;双醛淀粉;醛基含量;结晶结构;热性能
摘要：
以玉米淀粉为原料,盐酸为酸解剂,高碘酸钠为氧化剂,采用一步酸解氧化法合成双醛淀粉,经傅里叶变换红外光谱仪表征证明成功制得了双醛淀粉.研究了反应温度、反应时间、盐酸浓度和淀粉乳浓度对双醛淀粉醛基含量的影响,并利用X射线衍射仪和热重分析仪进行了表征.结果表明,双醛淀粉的醛基含量随着反应温度的升高和反应时间的延长而增大,55℃和4 h后,酸解氧化趋于稳定.盐酸浓度和淀粉乳浓度过高会导致双醛淀粉的醛基含量下降,分别以0.6 mol/L和8%为宜.X射线衍射仪分析表明,随着盐酸浓度的增加,双醛淀粉的结晶度升高;热重分析仪分析表明,结晶度高的双醛淀粉热分解残余量也更多,而热分解初始温度随着盐酸浓度增加而降低.
语种：
中文
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麦秸/木材三层结构无机刨花板的制备工艺
作者：
卢立;潘亚鸽;朱凌波;唐钱;吴义强;...
期刊：
木材科学与技术 ,2017年31(6):15-19 ISSN：2096-9694
作者机构：
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; 李新功; 唐钱; 潘亚鸽; 朱凌波; 卢立] 中南林业科技大学
关键词：
麦秸;木材;三层结构刨花板;无机胶黏剂;优化工艺参数
摘要：
以麦秸、木材碎料和无机胶黏剂制备麦秸/木材三层结构刨花板.研究麦秸与木材配比、板材密度、热压时间和温度对板材性能的影响.结果表明:随麦秸配比增加,板材抗弯性能降低,内结合强度增大,吸水厚度膨胀率(TS)减小;随密度增加和热压时间延长,板材力学性能增大,TS降低;随热压温度升高,板材力学性能先增大后减小,TS呈相反趋势.优化制板工艺为:碎料配比5∶5,密度1.2 g/cm3,热压时间30 min,温度100℃.
语种：
中文
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Thermal Degradation and Combustion Performance Comparison of Plywood Based on Inorganic Adhesive and Phenol-Formaldehyde Resin
作者：
Yang, Shoulu;Wu, Yiqiang;Ji, Ning;Qing, Yan;Li, Dan;...
期刊：
Journal of Computational and Theoretical Nanoscience ,2017年14(1):775-779 ISSN：1546-1955
通讯作者：
Wu, Y.
作者机构：
GuiZhou Academy of Forestry, Guiyang, 550005, China;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
Cone calorimeter;Inorganic adhesive;Phenol-formaldehyde resin;Poplar plywood;Scanning electron microscopy;Thermo-gravimetric analysis
摘要：
The main objective of this work was to study a new inorganic adhesive used for wood-based panel. Inorganic adhesive and its poplar plywood were prepared to investigate their properties. Thermogravimetric analysis tests revealed that the total mass loss of inorganic adhesive was 76.24%, which was higher than that of phenol-formaldehyde resin (64.97%). The results showed better thermal stability of inorganic adhesive. For inorganic adhesive plywood, approximately 30% decrease in peak of heat release rate, 62% in total smoke production and 20% in mean CO2 yield, respectively, were seen compared to the control by cone calorimeter analysis. Scanning electron microscopy imaged wider glue line of inorganic adhesives plywood, which was related to the bonding strength of plywood. Thus the inorganic adhesive of fireproofing made in lab could be better used for plywood processing. © 2017 American Scientific Publishers.
语种：
英文
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碳纳米管与石墨烯协同改性天然石墨及其电化学性能
作者：
邓凌峰;彭辉艳;覃昱焜;吴义强
期刊：
材料工程 ,2017年45(4):121-127 ISSN：1001-4381
通讯作者：
Deng, Ling-Feng(denglingfeng168@126.com)
作者机构：
[邓凌峰; 彭辉艳; Qin, Yu-Kun; 吴义强] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[邓凌峰; 彭辉艳; Qin, Yu-Kun; 吴义强] 410004, China
通讯机构：
[Deng, L.-F.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
碳纳米管;氧化石墨烯;负极材料;电化学性能;三维网络结构
摘要：
以碳纳米管和氧化石墨烯为原料,二者按5∶3混合超声分散再高温还原制备碳纳米管/石墨烯/天然石墨(CNTs/ rGO/NG)锂离子复合负极材料。采用扫描电镜(SEM)、X射线衍射(XRD)、红外光谱(FTIR)和电化学测试等分析技术对复合材料的形貌、结构、电化学进行表征。结果表明:石墨烯和碳纳米管在天然石墨表面形成三维立体网络结构。与纯天然石墨相比,CNTs/rGO/NG复合材料具有良好的倍率性能和循环寿命,在0.1C时首次放电比容量为479mAh/g,可逆容量达473mAh/g,循环100次后容量为439.5mAh/g,容量保持率为92%,在0.5,1,5C不同电流倍率时容量依次为457,433,394mAh/g。
语种：
中文
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Determination of moisture content and moisture content profiles in wood during drying by low-field nuclear magnetic resonance
作者：
Xu, Kang;Lu, Jianxiong* ;Gao, Yulei;Wu, Yiqiang;Li, Xianjun
期刊：
Drying Technology ,2017年35(15):1909-1918 ISSN：0737-3937
通讯作者：
Lu, Jianxiong
作者机构：
[Gao, Yulei; Lu, Jianxiong; Xu, Kang] Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China.;[Wu, Yiqiang; Lu, Jianxiong; Li, Xianjun] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Li, Xianjun] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha, Hunan, Peoples R China.
通讯机构：
[Lu, Jianxiong] C;Chinese Acad Forestry, Res Inst Wood Ind, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Changsha 410004, Hunan, Peoples R China.
关键词：
Bound water;CPMG sequence;free water;NMR;relaxation time;SE-SPI sequence;wood drying
摘要：
In this article, the low-field nuclear magnetic resonance was used to measure the moisture content (MC) and MC profiles in poplar wood during real-time drying. The T2 distribution curve at each drying stage measured using the Carr–Purcell–Meiboom–Gill pulse sequence provided detailed information in the dynamic change of free water as well as bound water of the whole wood sample. In addition, a new developed SE-SPI pulse sequence was first used to evaluate the spatially resolved T2 distribution of the successive nondestructive sliced layer of wood. Combined with the area integration method, the moisture content in each layer was calculated, and the change of MC profiles within wood at the MC above and below fiber saturation point was well reflected. © 2017 Taylor & Francis.
语种：
英文
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Effect of thermal treatment on functional groups and degree of cellulose crystallinity of eucalyptus wood (eucalyptus grandis × eucalyptus urophylla)
作者：
Cheng, Xi Yi;Li, Xian Jun* ;Xu, Kang;Huang, Qiong Tao;Sun, Hong Nan;...
期刊：
FOREST PRODUCTS JOURNAL ,2017年67(1-2):135-140 ISSN：0015-7473
通讯作者：
Li, Xian Jun
作者机构：
[Li, Xian Jun; Cheng, Xi Yi; Xu, Kang; Wu, Yi Qiang] Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha, Hunan, Peoples R China.;[Huang, Qiong Tao; Sun, Hong Nan] Yihua Enterprise Grp Co Ltd, Yihua Timber Ind, Shantou, Guangdong, Peoples R China.
通讯机构：
[Li, Xian Jun] C;Cent South Univ Forestry & Technol, Mat Sci & Engn Coll, Changsha, Hunan, Peoples R China.
摘要：
In this study, eucalyptus wood was subjected to thermal treatment with super-heated steam under various conditions. The effects of temperature and exposure time on the functional groups and degree of cellulose crystallinity of the eucalyptus wood (Eucalyptus grandis3Eucalyptus urophylla) were analyzed. The results showed that the thermal treatment caused significant changes in the chemical composition and structure of wood. The Fourier transform infrared spectroscopy (FTIR) absorption peaks of the hydroxyl group decreased from 3,425 to 3,250 cm1 for all thermally treated samples. Higher treatment temperature and extended exposure led to the lower methyl levels, with almost no methyl present at 2208C. The aromatic ring first increased and then decreased with increasing temperature and exposure time. The carbonyl group maintained the same intensity, with small fluctuations, across the different thermal treatment conditions. Compared with the untreated wood sample, the X-ray diffraction peak position of thermally treated samples shifted slightly left from 22.028 to 21.068, and the distance between crystal planes increased. The degree of cellulose crystallinity of eucalyptus wood was affected significantly by treatment temperature with a confidence level of 99 percent. © Forest Products Society 2017.
语种：
英文
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硅丙乳液对镁系无机胶黏剂性能和微结构的影响
作者：
肖俊华;左迎峰;吴义强;刘文杰;吴志平;...
期刊：
材料导报 ,2017年31(9):49-54 and 76 ISSN：1005-023X
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[肖俊华; 左迎峰; 吴义强; 刘文杰; 吴志平; 孟陶陶] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[肖俊华; 左迎峰; 吴义强; 刘文杰; 吴志平; 孟陶陶] 410004, 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：
镁系无机胶黏剂;硅丙乳液;力学强度;耐水性能;凝固时间;阻燃性能
摘要：
以硅丙乳液为改性剂,通过扫描电镜(SEM)、X射线衍射仪(XRD)等手段分析了添加量对镁系无机胶黏剂复合板材力学强度、耐水性能、阻燃性能和镁系无机胶黏剂凝固时间的影响原因。结果表明:硅丙乳液与镁系无机胶黏剂可以形成有机无机的互穿网络结构;随着添加量增大,硅丙乳液的成膜性增强,使镁系无机胶黏剂的黏结性能及材料的整体性增加,复合板材力学性能增强,耐水性能提高;添加量增加的同时也会延缓镁系无机胶黏剂的凝固时间,但不会对镁系无机胶黏剂的晶相组成产生影响;此外,镁系无机胶黏剂还赋予秸秆板较好的阻燃抑烟特性,硅丙乳液的添加对复合板材的阻燃性能没有明显影响。
语种：
中文
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A new concept of wood bonding design for strength enhanced southern yellow pine wood products
作者：
Liu, Ming;Wu, Yiqiang;Wan, Hui*
期刊：
Construction and Building Materials ,2017年157:694-699 ISSN：0950-0618
通讯作者：
Wan, Hui
作者机构：
[Liu, Ming; Wan, Hui] 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：
Bonding strength;Compression wood;Mechanical connection;Radial section
摘要：
Bonding strength in the structure of engineered wood products and composites is one of the vital properties for their application. Up to now, numerous research efforts have been made on improving durability, wettability, and strength of resins or adhesives. However, there are only a few reports on how to improve bond line strength according to wood feature itself. In this study, a new conceptual bonding design based on wood radial section feature was reported. In this design, finger-joint like bonding interfaces were generated by hot pressing two resin coated wood radial sections together at optimized pressure of 300 lb per square inch (psi). By this design, the wet bonding strength of the bond line has potential to be higher than dry bonding strength. Meanwhile, with a compression ratio of 7.3% of wood strips, the obtained dry bonding or shear strength has been significantly increased up to 33.9%, as compared to end matched tangential controls. Wood specific gravity played an important role in this design. A proper compression ratio explored here in the radial section was about 17%. This work has provided a new route to improve wood bonding strength in an environmentally friendly way. Its impact on bending strength and dimensional stability of bonded wood structures needs to be further investigated. © 2017
语种：
英文
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Preparation and characterization of dialdehyde starch by one-step acid hydrolysis and oxidation
作者：
Zuo, Yingfeng;Liu, Wenjie;Xiao, Junhua;Zhao, Xing;Zhu, Ying;...
期刊：
International Journal of Biological Macromolecules ,2017年103:1257-1264 ISSN：0141-8130
通讯作者：
Wu, Yiqiang
作者机构：
[Xiao, Junhua; Zhu, Ying; Wu, Yiqiang; Zuo, Yingfeng; Liu, Wenjie; Zhao, Xing] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Wu, Yiqiang; Zuo, Yingfeng; Zhao, Xing] 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：
Dialdehyde starch;Corn starch;Acid hydrolysis and oxidation;Sodium periodate;One-step method
摘要：
Dialdehyde starch was prepared by one-step synthesis of acid hydrolysis and oxidation, using corn starch as the raw material, sodium periodate (NaIO4) as the oxidant, and hydrochloric acid (HCl) as the acid solution. The prepared dialdehyde starch was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), and gel permeation chromatography (GPC). The results confirmed that oxidation occurred between the starch and NaIO4. The acid hydrolysis reaction reduced the molecular weight of starch and effectively improved the aldehyde group contents (92.7%). Scanning electron microscope (SEM) analysis indicated that the average particle size decreased after acid hydrolysis and oxidation reaction. X-ray diffraction (XRD) and thermal gravimetric analyzer (TGA) analysis demonstrated that the crystallinity of the obtained dialdehyde starch showed a downward trend and a decelerated thermal decomposition rate. The starch after acid hydrolysis and oxidation exhibited lower hot paste viscosity and higher reactivity.
语种：
英文
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双醛淀粉酸解氧化制备工艺优化研究
作者：
朱颖;刘文杰;左迎峰;吴义强;肖俊华;...
期刊：
西南林业大学学报：自然科学 ,2017年37(3):199-203 ISSN：2095-1914
作者机构：
中南林业科技大学材料科学与工程学院,湖南 长沙,410004;[刘文杰; 赵星; 吴义强; 朱颖; 肖俊华; 左迎峰] 中南林业科技大学
关键词：
双醛淀粉;酸解氧化;醛基含量;工艺优化;玉米淀粉
摘要：
以玉米淀粉为原料,盐酸为酸解剂,高碘酸钠为氧化剂,通过酸解氧化法制备双醛淀粉.采用正交试验法研究了盐酸浓度、 反应温度和反应时间对双醛淀粉醛基含量的影响,通过效应曲线分析、 交互作用和显著性分析优化了酸解氧化工艺.结果表明:对双醛淀粉醛基含量的影响因素依次为反应温度、 反应时间、 盐酸浓度;双醛淀粉制备的最优工艺条件为盐酸浓度0.9 mol/L、反应温度55℃、 反应时间2 h,在此工艺条件下得到双醛淀粉的醛基含量为69.56%.
语种：
中文
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Nanocellulose composites with enhanced interfacial compatibility and mechanical properties using a hybrid-toughened epoxy matrix
作者：
Kuo, Pei-Yu;Barros, Luizmar de Assis;Yan, Ning* ;Sain, Mohini;Qing, Yan;...
期刊：
Carbohydrate Polymers ,2017年177:249-257 ISSN：0144-8617
通讯作者：
Yan, Ning
作者机构：
[Kuo, Pei-Yu] Natl Ilan Univ, Dept Forestry & Nat Resources, 1,Sect 1,Shennong Rd, Yilan, Yilan County, Taiwan.;[Barros, Luizmar de Assis] Univ Fed Rural Rio de Janeiro, Dept Wood Chem, Inst Forestry, Rodovia BR 465 Km7 Campus Univ, BR-23851970 Seropedica, RJ, Brazil.;[Sain, Mohini; Yan, Ning] Univ Toronto, Fac Forestry, 33 Willcocks St, Toronto, ON M5S 3B3, Canada.;[Sain, Mohini; Yan, Ning] Univ Toronto, Dept Chem Engn & Appl Chem, 200 Coll St, Toronto, ON M5S 3E5, Canada.;[Wu, Yiqiang; Yan, Ning; Qing, Yan] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Yan, Ning] U;Univ Toronto, Dept Chem Engn, 200 Coll St, Toronto, ON M5S 3E5, Canada.
关键词：
Bio-epoxy;Bio-nanocomposite;Fibre/resin interface;Hybrid-toughened epoxy;Nanocellulose fibres
摘要：
Although there is a growing interest in utilizing nanocellulose fibres (NCFs) based composites for achieving a higher sustainability, mechanical performance of these composites is limited due to the poor compatibility between fibre reinforcement and polymer matrices. Here we developed a bio-nanocomposite with an enhanced fibre/resin interface using a hybrid-toughened epoxy. A strong reinforcing effect of NCFs was achieved, demonstrating an increase up to 88% in tensile strength and 298% in tensile modulus as compared to neat petro-based P-epoxy. The toughness of neat P-epoxy was improved by 84% with the addition of 10 wt% bio-based E-epoxy monomers, which also mitigated the amount of usage of bisphenol A (BPA). The morphological analyses showed that the hybrid epoxy improved the resin penetration and fibre distribution significantly in the resulting composites. Thus, our findings demonstrated the promise of developing sustainable and high performance epoxy composites combing NCFs with a hybrid petro-based and bio-based epoxy resin system. © 2017 Elsevier Ltd
语种：
英文
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Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi-Solid-State Zn–MnO2 Battery
作者：
Zeng, Yinxiang;Zhang, Xiyue;Meng, Yue;Yu, Minghao;Yi, Jianan;...
期刊：
Advanced Materials ,2017年29(26):1700274- ISSN：0935-9648
通讯作者：
Lu, Xihong;Wu, Yiqiang
作者机构：
[Zhang, Xiyue; Yu, Minghao; Tong, Yexiang; Zeng, Yinxiang; Meng, Yue; Lu, Xihong] Sun Yat Sen Univ, Sch Chem, Key Lab Bioinorgan & Synthet Chem KLGHEI Environm, MOE, Guangzhou 510275, Guangdong, Peoples R China.;[Wu, Yiqiang; Yi, Jianan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Lu, Xihong] S;[Wu, Yiqiang] C;Sun Yat Sen Univ, Sch Chem, Key Lab Bioinorgan & Synthet Chem KLGHEI Environm, MOE, Guangzhou 510275, Guangdong, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Zn-MnO2 batteries;durability;flexible;rechargeable;ultrahigh energy density
摘要：
Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high-performance and stable flexible rechargeable quasi-solid-state Zn–MnO2 battery is constructed by engineering MnO2 electrodes and gel electrolyte. Benefiting from a poly(3,4-ethylenedioxythiophene) (PEDOT) buffer layer and a Mn2+-based neutral electrolyte, the fabricated Zn–MnO2@PEDOT battery presents a remarkable capacity of 366.6 mA h g−1 and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl2/MnSO4 gel as electrolyte, the as-fabricated quasi-solid-state Zn–MnO2@PEDOT battery remains highly rechargeable, maintaining more than 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles. Moreover, this flexible quasi-solid-state Zn–MnO2 battery achieves an admirable energy density of 504.9 W h kg−1 (33.95 mW h cm−3), together with a peak power density of 8.6 kW kg−1, substantially higher than most recently reported flexible energy-storage devices. With the merits of impressive energy density and durability, this highly flexible rechargeable Zn–MnO2 battery opens new opportunities for powering portable and wearable electronics. © 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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超疏水木材老化性能初步探究
作者：
王爽;刘明;贾闪闪;卿彦;吴义强
期刊：
中南林业科技大学学报 ,2017年37(4):104-108 ISSN：1673-923X
作者机构：
[王爽; 刘明; 贾闪闪; 卿彦; 吴义强] 中南林业科技大学材料科学与工程学院, 湖南, 长沙, 410004
关键词：
超疏水木材;水热法;湿热老化;化学稳定性
摘要：
以杉木为基底,采用一步水热法在木材基底上构建超疏水结构,使水滴静态接触角可达151 °,滚动角小于5 °。并采用湿热老化实验和化学稳定性测试实验初步探究超疏水木材老化性能。实验结果表明,超疏水木材经72 h 湿热老化实验之后,表面水滴静态接触角仍可达150.5 °,其滚动角小于5 °。在强酸溶液中浸泡8 h 后水滴接触角仍可达150 °,但在强碱溶液中浸泡后水滴接触角急剧下降。
语种：
中文
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Water vapor sorption properties of cellulose nanocrystals and nanofibers using dynamic vapor sorption apparatus
作者：
Guo, Xin;Wu, Yiqiang* ;Xie, Xinfeng
期刊：
Scientific Reports ,2017年7(1):14207 ISSN：2045-2322
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.;[Xie, Xinfeng] Michigan Technol Univ, Sch Forest Resources & Environm Sci, Houghton, MI 49931 USA.
通讯机构：
[Wu, Yiqiang] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
摘要：
Hygroscopic behavior is an inherent characteristic of nanocellulose which strongly affects its applications. In this study, the water vapor sorption behavior of four nanocellulose samples, such as cellulose nanocrystals and nanofibers with cellulose I and II structures (cellulose nanocrystals (CNC) I, CNC II, cellulose nanofibers (CNF) I, and CNF II) were studied by dynamic vapor sorption. The highly reproducible data including the running time, real-time sample mass, target relative humidity (RH), actual RH, and isotherm temperature were recorded during the sorption process. In analyzing these data, significant differences in the total running time, equilibrium moisture content, sorption hysteresis and sorption kinetics between these four nanocellulose samples were confirmed. It was important to note that CNC I, CNC II, CNF I, and CNF II had equilibrium moisture contents of 21.4, 28.6, 33.2, and 38.9%, respectively, at a RH of 95%. Then, the sorption kinetics behavior was accurately described by using the parallel exponential kinetics (PEK) model. Furthermore, the Kelvin-Voigt model was introduced to interpret the PEK behavior and calculate the modulus of these four nanocellulose samples.
语种：
英文
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复配比例对淀粉/酚醛树脂复合胶性能的影响
作者：
王豫立;王洁;王健;吴义强;刘文杰;...
期刊：
中国胶粘剂 ,2017年26(6):19-22+42 ISSN：1004-2849
作者机构：
中南林业科技大学材料科学与工程学院,湖南长沙,410004;[刘文杰; 王豫立; 吴义强; 王健; 王洁; 左迎峰] 中南林业科技大学
关键词：
淀粉;酚醛树脂;胶粘剂;胶接性能;固化性能
摘要：
以玉米淀粉为原料、次氯酸钠为氧化剂和聚乙烯醇（PVA）为接枝剂,采用氧化接枝法制备了淀粉胶;然后以酚醛树脂（PF）为交联剂,制得淀粉/PF复合胶。着重考察了淀粉胶/PF胶复配比例对复合胶固含量、黏度、胶接强度、耐水性和固化性能等影响。研究结果表明:当m（淀粉胶）∶m（PF胶）=3∶7时,复合胶的固含量、黏度、胶接强度和耐水性俱佳。当淀粉胶比例较小时,复合胶的固化放热量较大、固化速率较快;当淀粉胶比例继续增加时,复合胶的固化反应趋缓。
语种：
中文
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现代竹集成材家具的特性研究
作者：
李萍;吴义强;左迎峰
期刊：
家具与室内装饰 ,2017年(03):82-83 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;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：
竹集成材;现代家具;文化特性;形态特性;环境特性;感觉特性
摘要：
随着木材资源供需矛盾激化,我国家具产业出现了原材料不足的危机.为了解决这一问题,同时发挥现有竹材资源的优势,竹集成材作为一种新的家具基材受到了广泛的关注,在此背景下现代竹集成材家具应运而生.本文从竹集成材的概念与特点入手,简述了竹集成材在现代家具设计中的应用;重点讨论了现代竹集成材家具所具有深刻的文化特性、独特的形态特性、科学的环境特性以及亲切的感觉特性;为今后竹集成材家具的设计和制造提供理论指导.
语种：
中文
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Characterizing spatial distribution of the adsorbed water in wood cell wall of Ginkgo biloba L. by mu-FTIR and confocal Raman spectroscopy
作者：
Guo, Xin;Wu, Yiqiang* ;Yan, Ning
期刊：
Holzforschung ,2017年71(5):415-423 ISSN：0018-3830
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.;[Yan, Ning] Univ Toronto, Fac Forestry, 33 Willcocks St, Toronto, ON M5S 3B3, Canada.
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：
mu-FTIR;adsorbed water;cell wall;confocal Raman spectroscopy;relative humidity;spatial distribution of water
摘要：
The adsorbed water influences significantly, the physical and mechanical properties of wood. In the present paper, the spatial distribution of adsorbed water in wood cell walls has been studied by μ-Fourier transform infrared (μ-FTIR) and confocal Raman spectroscopy. In situ μ-FTIR spectra were collected from three randomly selected areas in different cell wall regions, which were exposed to an environment with 0% to 96% relative humidity (RH). The water adsorption sites were easily detectable based on OH, C=O, and C-O group vibrations and it was shown that the adsorbed water concentration was not uniform in different regions. Confocal Raman spectroscopy images were collected from the cell corner (CC) and middle layer of the secondary wall (S2) and the non-uniformity of water distribution could also be confirmed by this approach. It was demonstrated that both μ-FTIR and confocal Raman spectroscopy provide valuable information about the spatial distribution of adsorbed water in morphologically distinct cell wall regions. ©2017 Walter de Gruyter GmbH, Berlin/Boston.
语种：
英文
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Achieving Ultrahigh Energy Density and Long Durability in a Flexible Rechargeable Quasi-Solid-State Zn–MnO2 Battery
作者：
Zeng, Yinxiang;Zhang, Xiyue;Meng, Yue;Yu, Minghao;Yi, Jianan;...
期刊：
Advanced Materials ,2017年29(26):211-212 ISSN：0935-9648
通讯作者：
Lu, Xihong;Wu, Yiqiang
作者机构：
[Zhang, Xiyue; Yu, Minghao; Tong, Yexiang; Zeng, Yinxiang; Meng, Yue; Lu, Xihong] Sun Yat Sen Univ, Sch Chem, Key Lab Bioinorgan & Synthet Chem KLGHEI Environm, MOE, Guangzhou 510275, Guangdong, Peoples R China.;[Wu, Yiqiang; Yi, Jianan] Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Lu, Xihong] S;[Wu, Yiqiang] C;Sun Yat Sen Univ, Sch Chem, Key Lab Bioinorgan & Synthet Chem KLGHEI Environm, MOE, Guangzhou 510275, Guangdong, Peoples R China.;Cent South Univ Forestry & Technol, Hunan Prov Collaborat Innovat Ctr High Efficiency, Sch Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
会议名称：
第二届中国（国际）能源材料化学研讨会
会议时间：
2017-06-09
会议地点：
中国湖南长沙
关键词：
durability;flexible;rechargeable;ultrahigh energy density;Zn–MnO2 batteries
摘要：
Advanced flexible batteries with high energy density and long cycle life are an important research target. Herein, the first paradigm of a high-performance and stable flexible rechargeable quasi-solid-state Zn–MnO<inf>2</inf>battery is constructed by engineering MnO<inf>2</inf>electrodes and gel electrolyte. Benefiting from a poly(3,4-ethylenedioxythiophene) (PEDOT) buffer layer and a Mn<sup>2+</sup>-based neutral electrolyte, the fabricated Zn–MnO<inf>2</inf>@PEDOT battery presents a remarkable capacity of 366.6 mA h g<sup>−1</sup>and good cycling performance (83.7% after 300 cycles) in aqueous electrolyte. More importantly, when using PVA/ZnCl<inf>2</inf>/MnSO<inf>4</inf>gel as electrolyte, the as-fabricated quasi-solid-state Zn–MnO<inf>2</inf>@PEDOT battery remains highly rechargeable, maintaining more than 77.7% of its initial capacity and nearly 100% Coulombic efficiency after 300 cycles. Moreover, this flexible quasi-solid-state Zn–MnO<inf>2</inf>battery achieves an admirable energy density of 504.9 W h kg<sup>−1</sup>(33.95 mW h cm<sup>−3</sup>), together with a peak power density of 8.6 kW kg<sup>−1</sup>, substantially higher than most recently reported flexible energy-storage devices. With the merits of impressive energy density and durability, this highly flexible rechargeable Zn–MnO<inf>2</inf>battery opens new opportunities for powering portable and wearable electronics. ©2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
语种：
英文
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Progress in Conductive Polymers in Fibrous Energy Devices
作者：
Liao Chun-Rong;Xiong Feng;Li Xian-Jun;Wu Yi-Qiang;Luo Yong-Feng*
期刊：
物理化学学报 ,2017年33(2):329-343 ISSN：1000-6818
通讯作者：
Luo Yong-Feng
作者机构：
[Xiong Feng; Luo Yong-Feng; Liao Chun-Rong] Cent South Univ Forestry & Technol, Coll Sci, Changsha 410018, Peoples R China.;[Xiong Feng; Luo Yong-Feng; Liao Chun-Rong] Fudan Univ, Lab Adv Mat, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China.;[Li Xian-Jun; Wu Yi-Qiang] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410018, Peoples R China.
通讯机构：
[Luo Yong-Feng] C;[Luo Yong-Feng] F;Cent South Univ Forestry & Technol, Coll Sci, Changsha 410018, Peoples R China.;Fudan Univ, Lab Adv Mat, State Key Lab Mol Engn Polymers, Shanghai 200438, Peoples R China.
关键词：
Conductive polymer;Fiber;Supercapacitor;Solar cell;Fibrous energy device
摘要：
Conductive polymers implemented in fibrous energy devices have drawn considerable attention because of their economic importance, good environmental stability, and electrical conductivity. Conductive polymers demonstrate interesting mechanical, electronic, and optical properties, controllable chemical and electrochemical behavior, and facile processability. This review elaborates on the latest research in conductive polymers in fibrous energy devices, such as fibrous supercapacitors, fibrous solar cells, and fibrous integrated energy devices. The performance requirements of these fibrous energy devices, with specific reference to related materials, fabrication techniques, fiber structure, and electronic transport as well as mechanical functionality, are also reviewed in this paper.
语种：
英文
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