秸秆人造板制造及应用研究进展
作者：
李萍;左迎峰;吴义强;赵星;王健
期刊：
材料导报 ,2019年33(15):2624-2630 ISSN：1005-023X
通讯作者：
Zuo, Yingfeng(zuoyf1986@163.com)
作者机构：
[李萍; 左迎峰; 吴义强; 赵星; 王健] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha;410004, China;College of Art & Design, Xiangnan University, Chenzhou;423000, China;[李萍] 410004, China<&wdkj&>College of Art & Design, Xiangnan University, Chenzhou
关键词：
秸秆人造板;胶合界面;胶黏剂;成型工艺;改性机理
摘要：
为缓解我国木材供需矛盾,提高秸秆利用率和附加值,将秸秆用于生产人造板是一种有效的途径。本文基于几种常见的秸秆人造板及其特性,从产业发展和技术研究角度阐述了国内外秸秆人造板发展情况。针对秸秆人造板制造中存在的问题,从界面胶合机理及改性、胶黏剂制备与改性、成型工艺的选择与参数确定三个方面对提高秸秆人造板胶合强度、环保性能、生产能耗、生产成本和生产效率等进行了综述,并介绍了秸秆人造板在家具、地板、室内装饰和建筑墙体中的应用情况。同时,针对秸秆人造板在制备和改性机理研究及推广应用方面存在的不足,提出了进一步的研究建议。
语种：
中文
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基于响应曲面法优化酸解氧化制备高醛基含量的双醛淀粉的工艺条件
作者：
左迎峰;李萍;屠茹茹;赵星;袁光明;...
期刊：
材料导报 ,2019年33(1):335-341 ISSN：1005-023X
通讯作者：
Wu, Y.
作者机构：
[李萍; 屠茹茹; 赵星; 袁光明; 左迎峰; 吴义强] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 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：
酸解氧化;双醛淀粉;制备工艺;醛基含量;响应曲面法;性能表征
摘要：
本工作采用响应曲面法优化了一步酸解氧化制备双醛淀粉的工艺,以玉米淀粉为原料、盐酸（HCl）为酸解剂、高碘酸钠（NaIO4）为氧化剂,设置HCl浓度、淀粉乳浓度、反应温度和反应时间为变量。傅里叶变换红外光谱（FT-IR）和X射线光电子能谱（XPS）分析证明本实验成功制得了双醛淀粉。采用旋转黏度计、扫描电子显微镜（SEM）、X射线衍射仪（XRD）和热重分析仪（TGA）对双醛淀粉的糊化性能、颗粒形貌、结晶结构和热性能进行了表征。结果表明,对醛基含量的影响大小依次为反应温度>反应时间>淀粉乳浓度> HCl浓度。最佳制备工艺为:HCl浓度为1. 2mol/L,淀粉乳浓度为7%,反应温度为49℃,反应时间为4 h。在该条件下制得的双醛淀粉的醛基含量为85. 17%,与理论最大值86. 26%接近,说明优化结果可信。酸解氧化后,双醛淀粉的糊化黏度降至30 mPa·s,可显著提高反应活性和可操作性。SEM分析显示,双醛淀粉颗粒中间凹陷,呈现出环状结构。XRD分析表明,淀粉的结晶结构发生破坏,重结晶使结晶度增大至36. 05%。TGA分析表明,双醛淀粉受热分解起始温度降低,但分解残余率提高,说明其热塑性和热稳定性有所提高。
语种：
中文
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聚乳酸接枝淀粉原位固相聚合工艺优化研究
作者：
何啸宇;徐冰杰;李萍;吴义强;左迎峰
期刊：
功能材料 ,2019年50(3):3118-3122 ISSN：1001-9731
通讯作者：
Zuo, Y.
作者机构：
[徐冰杰; 李萍; 吴义强; 何啸宇; 左迎峰] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, 410004, China
通讯机构：
[Zuo, Y.] S;School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
淀粉;乳酸;原位固相聚合;工艺优化;疏水性;分子量及分布
摘要：
为减少淀粉分子链中的亲水羟基,从而提高其与聚乳酸(PLA)树脂的界面相容性,以玉米淀粉为原料,乳酸为接枝单体,辛酸亚锡为催化剂,通过原位固相聚合法制备得到具有一定疏水性能的聚乳酸接枝淀粉(PLA-g-淀粉)。采用正交试验法研究了单体比例、反应温度和反应时间对PLA-g-淀粉接枝率的影响,通过直观分析和显著性分析优化了原位固相聚合工艺,并对疏水性、分子量及分布、糊化粘度进行了分析。结果表明,PLA-g-淀粉制备的最优工艺条件为单体比例25%、反应温度100℃和反应时间为2 h,在此工艺条件下制得PLA-g-淀粉的接枝率为20.78%。经过原位固相接枝改性后,淀粉的疏水性能得到显著改善,数均分子量(M_n)、重均分子量(M_w)、z均分子量(M_z)和分布指数(DI)都不同程度增大,糊化粘度也相应得到增大。
语种：
中文
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无机质增强木材研究进展与发展趋势
作者：
周亚;李萍;左迎峰;袁光明;李贤军;...
期刊：
材料导报 ,2019年33(17):2989-2996 ISSN：1005-023X
作者机构：
中南林业科技大学材料科学与工程学院,长沙,410004;[李贤军; 吴义强; 袁光明; 周亚; 左迎峰; 李萍] 中南林业科技大学
关键词：
人工林木材;无机质增强;直接浸注法;双剂扩散法;溶胶-凝胶法;插层复合法
摘要：
将人工林木材进行增强改性是改良木材材性和缓解木材供需矛盾的重要方法。由于常用有机物质增强木材存在环境污染和性能缺陷等问题,而无机质改性木材具有良好的力学性能、阻燃性能和耐腐性能,能最大限度地保留木材的视觉环境学特性,且其具有价格低廉、天然无毒等优良特性,逐渐成为研究者们的关注重点。本文介绍了无机质增强木材机理及特性,阐述了无机质增强木材的五种方法:直接浸注法、双剂扩散法、溶胶-凝胶法、插层复合法和其他方法,并分析了五种方法对改性木材性能的影响。提出了超声波辅助与无机质结合增强木材、无机-有机杂化和原位浸渍法增强木材的发展趋势,并指出了无机质增强木材研究仍需解决的问题。
语种：
中文
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PVA交联处理对硅酸钠胶黏剂性能的影响
作者：
左迎峰;吴义强;刘晓梅;张新荔;李新功
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
会议名称：
2015年全国无机硅化物行业年会暨新常态行业发展研讨会
会议时间：
201509
会议地点：
宜昌
会议论文集名称：
2015年全国无机硅化物行业年会暨新常态行业发展研讨会论文集
关键词：
硅酸钠胶黏剂;交联工艺;耐水性能;胶接强度
摘要：
采用聚乙烯醇(PVA)与硅酸钠进行交联处理,以改善硅酸钠胶黏剂的胶接强度和耐水性能.研究了PVA交联反应温度、时间和pH值对硅酸钠胶黏剂胶接强度和耐水性能的影响,并采用傅立叶变换红外光谱(FT-IR)研究交联改性提高胶接强度和耐水性能的机制.结果表明:交联温度为80℃,交联时间为90min,pH值为9时,PVA交联硅酸钠胶黏剂的胶接强度和耐水性能最佳;FT-IR分析显示PVA和硅酸钠成功发生交联,并促进硅酸钠胶黏剂的固化,从而使胶接强度和耐水性能得到提高.
语种：
中文
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Preparation and characterization of resorcinol-dialdehyde starch-formaldehyde copolycondensation resin adhesive
作者：
Li, Ping;Wu, Yiqiang;Zhou, Ya;Zuo, Yingfeng*
期刊：
International Journal of Biological Macromolecules ,2019年127:12-17 ISSN：0141-8130
通讯作者：
Zuo, Yingfeng
作者机构：
[Zhou, Ya; Wu, Yiqiang; Li, Ping; Zuo, Yingfeng] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[Li, Ping] Xiangnan Univ, Coll Art & Design, Chenzhou 423000, Hunan, Peoples R China.
通讯机构：
[Zuo, Yingfeng] C;Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.
关键词：
Resorcinol;Dialdehyde starch;Copolycondensation;Adhesive;Accelerated curing;Permeability
摘要：
A resorcinol-dialdehyde starch-formaldehyde (RDSF) copolycondensation resin adhesive was prepared by substituting high reactive dialdehyde starch fora portion of formaldehyde in the formulation. Fourier transforms infrared spectrometer (FTIR) analysis results confirmed that the copolycondensation reaction of the dialdehyde starch with resorcinol and formaldehyde was successful. The curing property, thermal stability, permeability and crystal structure of the RDSF adhesive were characterized using differential scanning calorimetry (DSC), thermo-gravimetric analysis (TGA), scanning electron microscope (SEM), X-ray diffraction (XRD). The solids content, viscosity, curing time, bonding strength were also obtained. The results showed that the RDSF adhesive had a higher solids content, moderate viscosity, shorter curing time and better bond strength than a standard resorcinol starch-formaldehyde (RSF) adhesive. It was found that dialdehyde starch could accelerate the curing rate, while decreasing the curing temperature and heat release during the curing process of RDSF. The dense cross linked structure of the dialdehyde starch and resorcinol-formaldehyde (RF) system produced improved thermal stability. SEM results showed that the RDSF adhesive formed a thin and continuous adhesive layer on the surface of a poplar board, and filled the pores of the wood, which improved the bond strength. The crystal structure of the RDSF was not altered by addition of the starch, and the physicochemical properties of the adhesive were similar to those of a normal resorcinol-formaldehyde resin. (C) 2018 Elsevier B.V. All rights reserved.
语种：
英文
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竹纤维/聚乳酸可降解复合材料相容界面构建进展
作者：
李文豪;吴义强;李萍;李新功;左迎峰
期刊：
材料导报 ,2018年32(17):3076-3082 ISSN：1005-023X
通讯作者：
Zuo, Yingfeng(zuoyf1986@163.com)
作者机构：
[李文豪; 吴义强; 李萍; 李新功; 左迎峰] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[李文豪; 吴义强; 李萍; 李新功; 左迎峰] 410004, China
通讯机构：
[Zuo, Y.] C;College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha, China
关键词：
竹纤维;聚乳酸;复合材料;相容界面
摘要：
竹纤维/聚乳酸可降解复合材料是一种性能优越、可完全生物降解的绿色生态环保材料。在针对亲水竹纤维与疏水聚乳酸界面不相容而导致竹纤维/聚乳酸复合材料性能劣化的问题,研究者通常采用三种策略来提高其界面相容性:竹纤维改性、聚乳酸树脂改性和增容剂改性。在现有研究基础上,未来可以通过引进纳米纤维改性粒子改善复合体系的界面相容性,完善两相界面基础理论,促进更深入的界面作用及其机理研究,以推动竹纤维/聚乳酸可降解复合材料的发展。
语种：
中文
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水灰比对镁系无机轻质材料性能的影响规律
作者：
左迎峰;肖俊华;李萍;王健;李贤军;...
期刊：
材料导报 ,2018年32(14):2370-2375 ISSN：1005-023X
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[左迎峰; 肖俊华; 李萍; 王健; 李贤军; 吴义强] College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha;410004, China;College of Art & Design, Xiangnan University, Chenzhou;423000, China;[左迎峰; 肖俊华; 王健; 李贤军; 吴义强] 410004, China
通讯机构：
[Wu, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
关键词：
镁系胶凝材料;化学发泡;无机轻质材料;水灰比;孔结构
摘要：
以镁系胶凝材料为主料,双氧水为发泡剂,二氧化锰为激发剂,硬脂酸钙为稳定剂,聚丙烯酰胺为增稠剂,通过化学发泡法制备内部含有大量密闭气孔的镁系无机轻质材料。探讨了水灰比(镁盐水用量与氧化镁粉比率)对镁质无机轻质材料表观密度、压缩强度、弯曲强度、孔结构及耐水性的影响规律。实验结果表明,水灰比不仅影响镁系无机轻质材料的孔结构和发泡成型,对晶体结构也有较大影响。随着水灰比增大,浆体稠度降低,镁系无机轻质材料的表观密度减小,孔结构形态逐渐得到改善,力学强度和耐水性则是先增大后减小。在水灰比为1.4时,强度相峰值最大,镁系无机轻质材料压缩强度和弯曲强度最大,耐水性最佳,同时平均孔径较小,孔隙率和圆度值最接近开普勒理想模型数值,表观密度仅为0.41g/cm~3,适合作为节能轻质墙体材料使用。
语种：
中文
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碱处理对竹纤维/聚乳酸可降解复合材料性能影响研究
作者：
左迎峰;李萍;刘文杰;李新功;江萍;...
期刊：
功能材料 ,2018年49(2):02006-02012 ISSN：1001-9731
通讯作者：
Wu, Y.
作者机构：
[左迎峰; 刘文杰; 李新功; 江萍; 吴义强; 李萍] 中南林业科技大学材料科学与工程学院;[李萍] 湘南学院美术与设计学院
通讯机构：
[Wu, Y.] C;College of Material Science & Engineering, Central South University of Forestry & Technology, Changsha, China
关键词：
竹纤维;碱处理;聚乳酸;可降解复合材料;相容界面
摘要：
以NaOH溶液为改性剂对竹纤维进行碱处理,再与聚乳酸(PLA)熔融共混制备竹纤维/PLA可降解复合材料。探讨了NaOH溶液浓度、碱处理时间和碱处理温度对复合材料拉伸强度、抗弯强度和耐水性能的影响规律,并采用扫描电子显微镜(SEM)对碱处理竹纤维的表面形貌进行了观测。结果表明,碱处理使竹纤维表面粗糙度增大,单纤维的强度提高,有效提高了与PLA基体的机械黏接力。但碱浓度过大、处理时间过长或处理温度过高时,纤维素分子链排列致密程度降低,整体纤维的力学性能下降。NaOH溶液浓度为3%,处理时间为4h,处理温度为60℃时,所制得竹纤维/PLA复合材料拉伸性能、弯曲性能和耐水性能均最佳。
语种：
中文
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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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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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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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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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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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三聚氰胺/纳米TiO2联合改性脲醛树脂胶粘剂研究
作者：
刘文杰;刘明;李新功;李贤军;吴义强;...
期刊：
中国胶粘剂 ,2018年27(10):10-14 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;[李贤军; 卿彦; 刘文杰; 吴义强; 李新功; 刘明; 左迎峰] 中南林业科技大学
关键词：
三聚氰胺;纳米TiO2;脲醛树脂;游离甲醛;热性能
摘要：
以甲醛、尿素为原料,纳米TiO2和三聚氰胺为改性剂,采用“碱-酸-碱”的合成工艺合成脲醛树脂,并对三聚氰胺/纳米TiO2联合改性脲醛树脂工艺进行优化。研究结果表明：当纳米TiO2用量不变,脲醛树脂的黏度、固含量、胶合强度随三聚氰胺加入量增加而增大,而固化时间和游离甲醛含量则呈现出相反的变化趋势;添加w（三聚氰胺）=1.5%（相对于尿素添加质量而言）改性后的脲醛树脂游离甲醛含量为0.41%,耐水胶合强度为1.25 MPa,对不同配比的甲醛/尿素（F/U）脲醛树脂,三聚氰胺/纳米TiO2联合改性性能相似;改性后的脲醛树脂及纳米TiO2能够均匀分布于木材表面,以保证较好的胶合强度和联合改性效果。
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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原位固相聚合法制备聚乳酸-g-竹纤维
作者：
左迎峰;何啸宇;李萍;刘文杰;李文豪;...
期刊：
高分子材料科学与工程 ,2018年34(8):142-148 ISSN：1000-7555
通讯作者：
Wu, Yiqiang(wuyq0506@126.com)
作者机构：
[左迎峰; 何啸宇; 李萍; 刘文杰; 李文豪; 郭鑫; 吴义强] School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[左迎峰; 何啸宇; 李萍; 刘文杰; 李文豪; 郭鑫; 吴义强] 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：
竹纤维;聚乳酸;原位固相聚合;取代度;疏水性能
摘要：
以竹纤维为原料,乳酸为接枝单体,采用固相聚合法制备了聚乳酸接枝竹纤维(PLA-g-BF).傅里叶变换红外光谱表征发现乳酸与竹纤维通过固相聚合法成功发生了接枝反应.研究了乳酸/竹纤维质量比、反应温度和反应时间对PLA-g-BF PLA取代基含量和取代度的影响,采用扫描电子显微镜(SEM)、接触角测试仪(CA)对PLA-g-BF进行了表征,并测试了120 h内的吸水率.结果表明,乳酸/竹纤维质量比为2∶1,反应温度为80℃,反应时间为7h时,PLA-g-BF的PLA取代基含量和取代度达到最大值,分别为17.71％和38.74％.SEM测试显示竹纤维细胞壁上大量的纹孔被接枝物填充,且出现了明显的层状附着物.接触角和吸水率分析表明,通过固相聚合法将乳酸接枝到竹纤维上有效提高了竹纤维的疏水性能.
语种：
中文
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Preparation and Characterization of Esterified Bamboo Flour by an In Situ Solid Phase Method
作者：
Geng, Yaqi;Pei, Xiaohan;He, Xiaoyu;Li, Ping;Wu, Yiqiang;...
期刊：
Polymers ,2018年10(8):920- ISSN：2073-4360
通讯作者：
Zuo, Yingfeng
作者机构：
[Wu, Yiqiang; Li, Ping; Zuo, Yingfeng; Geng, Yaqi; Pei, Xiaohan; He, Xiaoyu] Cent South Univ Forestry & Technol, Coll Mat Sci & Engn, Changsha 410004, Hunan, Peoples R China.;[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：
[Zuo, Yingfeng] C;Cent South Univ Forestry & Technol, Coll 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.
关键词：
bamboo flour;in situ solid phase method;esterification modification;substituting degree;hydrophobicity
摘要：
Bamboo plastic composites have become a hot research topic and a key focus of research. However, many strong, polar, hydrophilic hydroxyl groups in bamboo flour (BF) results in poor interfacial compatibility between BF and hydrophobic polymers. Maleic anhydride-esterified (MAH-e-BF) and lactic acid-esterified bamboo flour (LA-e-BF) were prepared while using an in situ solid-phase esterification method with BF as the raw material and maleic anhydride or lactic acid as the esterifying agent. Fourier transform infrared spectroscopy results confirmed that BF esterification with maleic anhydride and lactic acid was successful, with the esterification degrees of MAH-e-BF and LA-e-BF at 21.04 ± 0.23% and 14.28 ± 0.17%, respectively. Esterified BF was characterized by scanning electron microscopy, contact angle testing, X-ray diffractometry, and thermogravimetric analysis. The results demonstrated that esterified BF surfaces were covered with graft polymer and the surface roughness and bonding degree of MAH-e-BF clearly larger than those of LA-e-BF. The hydrophobicity of esterified BF was significantly higher than BF and the hydrophobicity of MAH-e-BF was better than LA-e-BF. The crystalline structure of esterified BF showed some damage, while MAH-e-BF exhibited a greater decrease in crystallinity than LA-e-BF. Overall, the esterification reaction improved BF thermoplasticity, with the thermoplasticity of MAH-e-BF appearing to be better than LA-e-BF. © 2018 by the authors.
语种：
英文
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Preparation and characterization of fire retardant straw/magnesium cement composites with an organic-inorganic network structure
作者：
Zuo, Yingfeng;Xiao, Junhua;Wang, Jian;Liu, Wenjie;Li, Xingong;...
期刊：
Construction and Building Materials ,2018年171:404-413 ISSN：0950-0618
通讯作者：
Wu, Yiqiang
作者机构：
[Xiao, Junhua; Wang, Jian; Li, Xingong; Wu, Yiqiang; Zuo, Yingfeng; Liu, Wenjie] 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：
Fire-retardant;Magnesium cement;Mechanical property;Organic-inorganic network structure;Silicone-acrylate emulsion;Straw;Water resistance
摘要：
Magnesium cement product is an excellent fire-retardant material that has been extensively used in the building materials industry. But their strength and ability to withstand humid conditions still yet to be improved. The silicone-acrylate emulsion was utilized in this study to improve the water resistance and mechanical strength of the straw-magnesium cement (SMC) composites. The properties improvement mechanism and fire-retardant performances was also analyzed. For the SMC composites containing 6% silicone-acrylate emulsion, the modulus of rupture, internal bond strength and the strength retention coefficient after immersion have all increased significantly. In contrast, the thickness swelling, water absorption decreased dramatically. The analysis results showed that an organic-inorganic network structure was formed in the novel magnesium cement, which enhanced the integrity of the material and played a role in protecting the crystals against hydrolysis. With the enhanced water resistance and mechanical strength, the novel SMC composites broadened the use in humid environments and increased the service life. Their excellent fire-resistant properties make the novel SMC composites an ideal candidate for use in public venues. © 2018 Elsevier Ltd
语种：
英文
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Modification of Bamboo Fiber/Polylactic Acid Composites by Ternary Compound Plasticization
作者：
Li, Wenhao;He, Xiaoyu;Wu, Yiqiang;Li, Ping;Xu, Bingjie;...
期刊：
材料导报 ,2018年32:207-212 ISSN：1005-023X
通讯作者：
Zuo, Yingfeng(zuoyf1986@163.com)
作者机构：
[Li, Wenhao; He, Xiaoyu; Wu, Yiqiang; Li, Ping; Xu, Bingjie; Zuo, Yingfeng] College of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha;410004, China;[Li, Wenhao; He, Xiaoyu; Wu, Yiqiang; Li, Ping; Xu, Bingjie; Zuo, Yingfeng] 410004, China
摘要：
In view of the incompatibility between bamboo fiber and polylactic acid (PLA) and the brittleness of the obtained material, the plasticizing modification method was used to modify the bamboo fiber/PLA composite. Ternary compound plasticization was prepared by mixing glycerol, citrate and formamide. The effects of the compound ratio and addition ratio of ternary compound plasticizer on the interfacial compatibility of bamboo fiber/PLA composites were investigated. The bamboo fiber/PLA composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The bending properties, tensile properties and water absorption of the composites were also tes-ted. The experimental results showed that the best interfacial adhesion between bamboo fiber and PLA was obtained when the mass ratio of glycerol, citrate and formamide was 2:3:1, and the addition ratio was 10%. The bending strength, modulus of elasticity, tensile strength and elongation at break of bamboo fiber/PLA composites all reached the maximum, and the water resistance and thermal stability were the best. © 2018, Materials Review Magazine. All right reserved.
语种：
中文
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