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Utilization of surface differences to improve dyeing properties of poly(m-phenylene isophthalamide) membranes |
Shenshen OUYANG, Tao WANG(), Longgang ZHONG, Shunli WANG, Sheng WANG() |
Key Laboratory of Advanced Textile Materials and Manufacturing Technology (Ministry of Education), Zhejiang Sci-Tech University, Hangzhou 310018, China |
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Abstract 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.
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Keywords
wettability
polymer
surface difference
electrospun
PMIA
interfaces
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Corresponding Author(s):
Tao WANG,Sheng WANG
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Online First Date: 16 May 2018
Issue Date: 29 May 2018
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