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

作者：Ouyang, Shenshen; Wang, Tao^*; Zhong, Longgang; Wang, Shunli; Wang, Sheng

来源：Frontiers of Materials Science, 2018, 12(2): 129-138.

DOI：10.1007/s11706-018-0422-3

• wettability
• polymer
• surface difference
• electrospun
• PMIA
• interfaces

Bulk poly(m-phenylene isophthalamide) (PMIA) can achieve flexibility upon dissolution by a LiCl/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 cis-configuration 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 cis/trans 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.

• 出版日期2018-6
• 单位浙江理工大学