纤维素/纳米Si_3N_4复合膜的制备与性能研究  

Preparation and Properties of Cellulose/Nano-Si_3N_4 Composite Membranes

作　　者：陈帅[1] 王玮[1] 马收[1] 刘晓亚[1] 

机构地区：[1]江南大学食品胶体与生物技术教育部重点实验室 化学与材料工程学院,江苏无锡214122

出　　处：《纤维素科学与技术》2015年第1期8-13,35,共7页Journal of Cellulose Science and Technology

基　　金：国家自然科学基金项目(51273085);江苏省产学研联合创新资金―前瞻性联合研究项目(BY2014023-07)

摘　　要：以LiOH/urea/H2O为溶剂体系,采用溶胶―凝胶法制备纤维素多孔膜的过程中,引入经表面改性的纳米氮化硅(Si3N4),制得了纤维素/纳米Si3N4复合膜。采用红外光谱分析(FT-IR)、扫描电子显微镜(SEM)、应力―应变分析、热导率测定和紫外光反射测试对纳米氮化硅表面改性的效果以及复合膜的结构和性能进行了表征。结果表明,纳米氮化硅表面成功地接枝上部分醇解的聚乙酸乙烯酯,使其在水中的分散性大幅提高;当纳米氮化硅含量适中时,在复合膜的拉伸强度和杨氏模量增加的同时,其导热率提高,并具有较高的抗紫外线性能,赋予了纤维素多孔膜新的功能性。Using the sol-gel method LiOH/urea/H2O solvent system, the cellulose/Si3N4 composite membranes were successfully prepared by the introduction of the surface-modified nano-Si3N4. The surface modification of nano-Si3N4 and the structure of cellulose/nano-Si3N4 composite membranes were characterized by FT-IR, SEM, stress and strain analysis, thermal conductivity measurement and UV reflection test to study the influence of the surface-modified nano-Si3N4 on the performance of composite membranes. The results showed that the surface of nano-SisN4 was successfully grafted polyvinyl acetate which was partially alcoholysis, that improved its dispersion in water. When the nano-Si3N4 content was appropriate, the tensile strength and Young＇s modulus of the composite membranes increased. While the composite membranes had an increased thermal conductivity and a high UV resistance, that given the cellulose porous membrane of new functionality.

关 键 词：纤维素 纳米氮化硅 复合膜 性能 

分 类 号：TQ352.6[化学工程]