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

Utilization of surface differences to improve dyeing properties of poly(m-phenylene isophthalamide) membranes
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利用表面差异改善聚间苯二甲酰间苯二胺膜的染色性能

DOI:
10.1007/s11706-018-0422-3
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发表时间:
2018-05
影响因子:
2.7
通讯作者:
王晟
王晟
中科院分区:
材料科学3区
文献类型:
--
作者:
欧阳申申;王騊;王晟

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大块聚间苯二苯甲酰胺(PMIA)在LiCl/二甲基乙酰胺共溶剂的溶解下可以获得柔韧性,但尽管偶尔出现提供弱负电荷的顺式酰胺基团,但仍保持疏水性。在本研究中,基于静电纺丝法和铸造法处理的PMIA膜表面的显著差异,通过一系列化学分析、原位金纳米粒子沉积和染料吸附实验发现,静电纺丝法处理的PMIA膜表面出现的顺式酰胺基团多于铸造法处理的PMIA膜。基于这种表面差异,提出了一种通过可逆地改变静电纺膜和铸膜的顺/反式构型来改善PMIA染色性能的策略。可逆链段开关机制是一种基于高分子材料固有分子特性调控高分子材料宏观性质的新方法。
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-situAu 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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