水环境对聚酰亚胺纤维分散及纸基材料性能的影响  

Effect of Water Environment on Dispersion of Polyimide Fibers and Properties of Paper-Based Materials

作　　者：党洪洋 张鑫 龙柱[1,2] 王士华 李志强 胡爱林 郭帅 Hongyang Dang;Xin Zhang;Zhu Long;Shihua Wang;Zhiqiang Li;Ailin Hu;Shuai Guo(Key Laboratory of Eco-Textiles,Ministry of Education,Jiangnan University,Wuxi 214122,China;Lianyungang Industrial Investment Group Co.,Ltd.,Lianyungang 222002,China;Lianyungang Fiber New Materials Research Institute Co.,Ltd.,Lianyungang 222002,China)

机构地区：[1]江南大学生态纺织教育部重点实验室,江苏无锡214122 [2]连云港纤维新材料研究院有限公司,江苏连云港222002 [3]连云港市工业投资集团有限公司,江苏连云港222002

出　　处：《高分子材料科学与工程》2020年第1期56-62,共7页Polymer Materials Science & Engineering

基　　金：连云港“555工程”计划(2015-13)

摘　　要：通过改变水环境的电导率、pH值、温度及纤维浓度并以正交试验加以优化,对聚酰亚胺短切纤维悬浮液的分散效果进行研究。采用纤维沉降度、吸光度、Zeta电位表征了不同水环境条件下聚酰亚胺纤维悬浮液的分散性能,确定了实验条件下最佳水环境的相关参数,优选出最适宜的纤维浓度,并对最佳水环境条件下分散后的纤维所成型的聚酰亚胺纤维纸基材料性能进行了探讨。结果表明,在实验条件下,当水体的pH值为6.0,水温为40℃,纤维浓度为4‰且水溶液电导率较低时,聚酰亚胺短切纤维的分散性能更好,成纸孔径分布更加均匀,在此分散工艺下成形的纸基材料的拉伸强度指数为35.9 N/mg,撕裂指数为40.1 mN·m 2/g。The dispersion effect of polyimide chopped fiber suspension was studied by changing the conductivity,pH,temperature and fiber concentration of the water-dispersed phase and optimizing by orthogonal test.The fiber sedimentation degree,absorbance and Zeta potential were used to characterize dispersion properties of polyimide fiber suspension under different water-dispersed phase conditions.The parameters of the best water-dispersed phase under the experimental conditions were determined,and the optimum fiber was selected.The concentration and properties of the polyimide fiber paper-based materials formed by the dispersed fibers under the optimal water-dispersed phase were discussed.The results show that under the experimental conditions,when the pH value of water is 6.0,the water temperature is 40℃,the fiber concentration is 4‰and the conductivity of the aqueous solution is low,the dispersion performance of polyimide chopped fibers is better.The pore size distribution is more uniform.The tensile strength index of the paper-based material formed under this dispersion process is 35.9 N/mg,and the tear index is 40.1 mN·m 2/g.

关 键 词：聚酰亚胺短切纤维 水环境 分散性能 纸基材料 

分 类 号：TQ342.731[化学工程—化纤工业]