PPTA复合纤维素纤维纸的制备及性能研究  

Preparation and Properties of PPTA Composite Cellulose Fiber Paper

作　　者：董彦惠 王元霞 赵敏 佟健闻 庹新林 DONG Yanhui;WANG Yuanxia;ZHAO Min;TONG Jianwen;TUO Xinlin(College of Materials Science and Engineering,Shenyang University of Chemical Technology,Shenyang,Liaoning Province,110142;Department of Chemical Engineering,Key Lab of Advanced Materials(MOE),Tsinghua University,Beijing,100084)

机构地区：[1]沈阳化工大学材料科学与工程学院,辽宁沈阳110142 [2]清华大学化学工程系,先进材料教育部重点实验室,北京100084

出　　处：《中国造纸》2024年第11期133-140,172,共9页China Pulp & Paper

基　　金：国家自然科学基金项目(52073154)。

摘　　要：本研究探讨了PPTA与纤维素纤维纸复合的工艺技术,将中等分子质量的聚对苯二甲酰对苯二胺(PPTA)在DMPU/LiCl中溶解并配制成稳定的溶液,采用刮涂法将其定速刮涂至普通的纤维素纤维纸表面,经凝固浴处理,使PPTA在纤维素纤维纸表面形成凝胶涂层,经干燥得到PPTA涂布纤维素纤维纸。PPTA表面涂层的引入改善了纤维素纤维纸表面的致密性和连续性,且其可以与纤维素纤维纸形成牢固的相互作用。在PPTA质量分数约5.7%的条件下,复合纸的拉伸强度从纤维素纤维纸的25.6 MPa提高至79.7 MPa,增长了211%;湿抗张强度从0.134 kN/m提高至0.731 kN/m,增长了446%;撕裂度从316.3 mN提高至662.3 mN,增长了109%,而且复合纸的阻燃性有显著增长,离火3 s内可自行熄灭,复合纸的电击穿强度达20.9 kV/mm,比纤维素纤维纸提高了90%。This paper presented an investigation into the process technology of poly(p-phenylene terephth amide)(PPTA)composite with cellulose fiber paper.The medium molecular weight PPTA was dissolved in DMPU/LiCl and formulated into a stable solution,which was then scraped onto the surface of ordinary cellulose fiber paper by the scraping method at a constant speed.The resulting gel coating was treated with a solidifying bath and subsequently dried to obtain PPTA-coated cellulose fiber paper.The introduction of PPTA surface coating resulted in an improvement in the denseness and continuity of the cellulose fiber paper surface,thereby facilitating a strong interaction with the cellulose fiber paper.The tensile strength of the composite paper increased significantly when the PPTA content was approximately 5.7%.The tensile strength of the cellulose fiber paper was 25.6 MPa,while that of the composite paper was 79.7 MPa,with a 211%increase.Similarly,the wet tensile strength increased from 0.134 kN/m to 0.731 kN/m,with a 446%increase.Additionally,the tear degree increased from 316.3 mN to 662.3 mN,with a 109%increase.Furthermore,the flame retardancy of the composite paper had increased significantly.It could self-extinguish within 3 when exposed to fire.Additionally,the electric breakdown strength of the composite paper was 20.9 kV/mm,which was an 90%increase compared to the original cellulose fiber paper.

关 键 词：PPTA 纤维素纤维纸 涂布 复合 

分 类 号：TS761.2[轻工技术与工程—制浆造纸工程] TQ317[化学工程—高聚物工业]