Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage.
Porous Film Coating Enabled by Polyvinyl Pyrrolidone (PVP) for Enhanced Air Permeability of Fabrics: The Effect of PVP Molecule Weight and Dosage.
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DOI：
10.3390/polym12122961
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发表时间：
2020-12-11
期刊：
影响因子：
5
通讯作者：
Petru M
中科院分区：
文献类型：
--
作者：
Jiang J;Shen Y;Yu D;Yang T;Wu M;Yang L;Petru M
这项研究开发了一种通用且简便的方法，通过选择性蚀刻添加的功能性聚乙烯吡咯烷酮（PVP）分子来创建孔并调整聚合物乳胶膜中的多孔结构。乳胶膜中形成的孔的形态与蚀刻前的 PVP 聚集体的形态相似。这一观察结果促使我们通过改变 PVP 分子量和用量来调节决定薄膜性能的孔形态，例如透气性。为此，系统研究了PVP分子量和用量对孔形成的影响。结果表明，随着PVP分子量或用量的增加，多孔膜的平均孔径从>10μm减小到亚微米（约0.4μm）。这是由于PVP分子对乳胶颗粒表面的强吸附力，进一步阻碍了PVP分子的扩散和自组装。此外，当使用较高分子量的PVP或较高剂量的PVP时，这种相互作用变得更加强烈，导致PVP聚集体的尺寸减小，以及乳胶膜中形成的孔。此外，根据CIE L*a*b*测量结果，PVP的添加对涂层织物的颜色影响很小。所提出的简便方法可用于提高涂层织物的透气性。
This study developed a versatile and facile method for creating pores and tuning the porous structure in the polymer latex films by selectively etching the added functional polyvinyl pyrrolidone (PVP) molecules. The pore formed in the latex films had a similar morphology to that of PVP aggregation before etching. This observation promotes us to regulate the pore morphology that determines the film’s property, such as air permeability through varying the PVP molecule weight and dosage. To this end, the effects of PVP molecule weight and dosage on the pore formation were systematically studied. The results showed that the average pore size of porous film decreased from >10 μm to sub-micron (about 0.4 μm) as the molecular weight or the dosage of PVP increased. This was ascribed to the strong adsorption affinity of PVP molecule onto the latex particle surface, which further hindered the diffusion and self-assembly of PVP molecule. In addition, this interaction became much stronger when the higher molecule weight of PVP or the higher dosage of PVP was employed, leading to the decreased size of PVP aggregation, as well as the formed pores in the latex films. Furthermore, the addition of PVP had little effect on the color of coated fabric based on the results of CIE L*a*b* measurement. The proposed facile method can be used to improve the air permeability of coated fabrics.
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影响因子：
5.7
作者：
Camlibel, Nurhan Onar;Avinc, Ozan;Yakin, Ismail
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DOI：
10.1016/j.colsurfa.2009.08.003
发表时间：
2009-10-05
影响因子：
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作者：
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作者：
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影响因子：
6.6
作者：
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通讯作者：
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