剑麻纤维素微晶(壳聚糖/聚对苯乙烯磺酸钠)层层自组装及其复合材料的热性能和阻燃性能  

Construction of Sisal Fiber Cellulose Microcrystal /Chitosan /Polystyrene Sulfonate via Layer-by-Layer Assembly and Flame Retardant Properties of the Composites

作　　者：曾思华[1] 韦春[1] 刘红霞[1] 谭玉园 黄超[1] 王武[1] 付俊[1] 

机构地区：[1]桂林理工大学省部共建广西有色金属及特色材料加工国家重点实验室培育基地有色金属及材料加工新技术教育部重点实验室材料科学与工程学院,广西桂林541004

出　　处：《高分子材料科学与工程》2014年第7期76-79,共4页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(21264005;21204013;51263005;51163003);广西自然科学基金资助项目(2013GXNSFDA019008)

摘　　要：采用层层自组装法,在剑麻纤维素微晶(SFCM)表面交替吸附壳聚糖(CH)和聚对苯乙烯磺酸钠(PSS)构筑CH/PSS阻燃涂层,采用Zeta电位、热重分析、场发射扫描电镜、垂直燃烧测试和燃烧量热等手段对复合材料的结构和性能进行表征。结果表明,CH/PSS涂层已经成功包覆在SFCM表面;随着吸附CH/PSS层数增加,复合材料的初始分解温度由302℃降低至237℃,残炭率由4.76%提高至27.34%;与纯SFCM相比,SFCM(CH/PSS)5点燃时间延长了1倍,残炭率提高到35.3%,最大热释放速率峰值(pkHRR)和热释放总量(Total HR)分别减少了87%和51.6%,说明构筑的自组装涂层明显提高了SFCM的阻燃性能。flame retardant nanocoatings were constructed by layer-by-layer selfassembly where cationic chitosan （CH） and anionic polystyrene sulfonate （PSS） were alternately adsorbed on the surface of sisal fiber cellulose microcrystal （SFCM）. The structure and properties of the composites were characterized by Zeta potential, thermogravimetric analysis （TGA）, field emission scanning electronic microscopy （FESEM）, vertical flame testing （VFT）, mcroscale mombustion calorimeter（MCC） and so on. The results indicate that chitosan/ polystyrene sulfonate nanolayers were successfully coated on the fiber surface. With CH/PSS layers increasing, the initial decomposition temperature of the composites decreases from 302 ℃ to 237℃, and the residues mass increases from 4.76 % to 27.34 %. VFT results show that, compared to the control SFCM, the ignition time of SFCM（CH/PSS）5 doubles and the residues mass of SFCM（CH/PSS）5 increases by 35.3%. MCC results show that the pkHRR and total heat release of SFCM（CH/PSS）5 decrease by 87% and 51.57% respectively. The CH/PSS coatings can significantly improve the flame retardancy of SFCM.

关 键 词：层层自组装 剑麻纤维素微晶 壳聚糖/聚苯乙烯磺酸钠涂层 阻燃 

分 类 号：O636.11[理学—高分子化学]