热压温度对热致液晶态聚芳酯纳米纤维膜性能的影响  

Effect of hot pressing temperature on properties of thermotropic liquid crystal polyarylate nanofiber membranes

作　　者：雷僮 刘雪阳 黄娇阳 白莹 王罗新 王桦 熊思维 Lei Tong;Liu Xueyang;Huang Jiaoyang;Bai Ying;Wang Luoxin;Wang Hua;Xiong Siwei(School of Materials Science and Engineering,Wuhan Textile University,Wuhan 430073,Hubei,China;Library of Wuhan Textile University,Wuhan 430073,Hubei,China;Textile Industry Science and Technology Development Center,China National Textile and Apparel Council,Beijing 100020,China)

机构地区：[1]武汉纺织大学材料科学与工程学院,湖北武汉430073 [2]武汉纺织大学图书馆,湖北武汉430073 [3]中国纺织工业联合会纺织工业科学技术发展中心,北京100020

出　　处：《产业用纺织品》2025年第1期16-21,42,共7页Technical Textiles

基　　金：国家重点研发计划(2021YFB3700101);中国纺织工业联合会应用基础研究(J202101);湖北省自然科学基金(2023AFB319);高技术有机纤维四川省重点实验室项目(202306090009)。

摘　　要：采用不同的热压温度对热致液晶态聚芳酯(PAR)纳米纤维膜进行热压处理,研究热压温度对PAR纳米纤维膜微观形貌、拉伸性能、吸水性能及表面平整度的影响。结果表明:在热压压力为10 MPa、热压时间为10 min的条件下,升高热压温度可提升PAR纳米纤维膜的拉伸性能和表面平整度。其中,当热压温度为230℃时:PAR纳米纤维膜的拉伸强度达47.39 MPa;热稳定性能优异,350℃环境中处理30 min后PAR纳米纤维膜的热收缩率仅为13.04%;阻燃性能优于商用芳纶纸;水中浸泡1 h后,吸水率低至4.4%。研究结果可为PAR纳米纤维膜产业的发展提供理论支撑和技术支持。Thermal pressing treatment was applied to thermotropic liquid crystal polyarylate(PAR)nanofiber membranes at various hot pressing temperatures to investigate the effects of hot pressing temperature on the microtopography,tensile property,water absorption and surface smoothness of the membranes.The results indicated that,under the condition that hot pressing pressure was 10 MPa and hot pressing time was 10 min,increasing the hot pressing temperature could enhance the tensile property and surface smoothness of the PAR nanofiber membranes.Specifically,when the hot pressing temperature was 230℃,the tensile strength of the PAR nanofiber membrane reached 47.39 MPa;the PAR nanofiber membrane exhibited excellent thermal stability,with thermal shrinkage rate only at 13.04%after being exposed to 350℃environment for 30 min;the flame retardancy was superior to that of commercial aramid paper;the water absorption rate was as low as 4.4%after being soaked in water for 1 h.The findings can provide theoretical support and technical assistance for the development of PAR nanofiber membrane industry.

关 键 词：热致液晶态 聚芳酯(PAR) 纳米纤维膜 热压温度 微观形貌 拉伸性能 热稳定性能 阻燃性能 吸水性能 表面平整度 

分 类 号：TQ342[化学工程—化纤工业] TS176[轻工技术与工程—纺织材料与纺织品设计]