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.
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)
出处
《中国造纸》
CAS
北大核心
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)。
作者简介
通信作者:庹新林,副研究员,博士生导师,主要从事全芳香族聚酰胺纤维、薄膜、涂层、复合材料及纳米纤维的分子设计、制备方案和工业化生产技术等方面的研究,E-mail:tuoxl@tsinghua.edu.cn;董彦惠,在读硕士研究生,主要从事对位芳纶的溶解及其应用的研究。
