Utilization of surface differences to improve dyeing properties of poly（m-phenylene isophthalamide） membranes  

作　　者：Shenshen OUYANG Tao WANG Longgang ZHONG Shunli WANG Sheng WANG 

机构地区：[1]Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Ministry of Education), Zhejiang Sci-Tech University, Hangzhou 310018, China

出　　处：《Frontiers of Materials Science》2018年第2期129-138,共10页材料学前沿（英文版）

基　　金：We thank the National Natural Science Foundation of China （Grant Nos. 51471153 and 51372227） and the 521 Talent Project of Zhejiang Sci-Tech University, Science and Technology Department of Zhejiang Province Foundation （No. 2017C37017） for providing financial support.

摘　　要：Bulk poly-m-phenylene isophthalamide （PMIA） can achieve flexibility upon dissolution by a LiCI/dimethylacetamide co-solvent, but remains hydrophobic despite the occasional emergence of cis amide groups providing a weak negative charge. In this study, based on the significant surface differences between PMIA membranes processed by nanofiber electrospinning and casting, a series of chemical analyses, in-situ Au nanoparticle depositions, and dye-adsorption experiments revealed that more cisconfiguration amide groups appeared on the surface of the electrospun PMIA membrane than on that of the cast membrane. Based on this surface difference, a strategy was proposed to improve the dyeing properties of PMIA by reversibly changing the cisltrans configurations of electrospun and cast membranes. The reversible chain-segment switch mechanism is a novel method for tuning the macroscale properties of polymer materials based on inherent molecular characteristics.Bulk poly-m-phenylene isophthalamide （PMIA） can achieve flexibility upon dissolution by a LiCI/dimethylacetamide co-solvent, but remains hydrophobic despite the occasional emergence of cis amide groups providing a weak negative charge. In this study, based on the significant surface differences between PMIA membranes processed by nanofiber electrospinning and casting, a series of chemical analyses, in-situ Au nanoparticle depositions, and dye-adsorption experiments revealed that more cisconfiguration amide groups appeared on the surface of the electrospun PMIA membrane than on that of the cast membrane. Based on this surface difference, a strategy was proposed to improve the dyeing properties of PMIA by reversibly changing the cisltrans configurations of electrospun and cast membranes. The reversible chain-segment switch mechanism is a novel method for tuning the macroscale properties of polymer materials based on inherent molecular characteristics.

关 键 词：WETTABILITY polymer surface difference ELECTROSPUN PMIA interfaces 

分 类 号：O484[理学—固体物理] TP311.56[理学—物理]