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首页> 美国卫生研究院文献>Scientific Reports >Facile approach to fabricate waterborne polyaniline nanocomposites with environmental benignity and high physical properties
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Facile approach to fabricate waterborne polyaniline nanocomposites with environmental benignity and high physical properties

机译：制备具有环境友好性和高物理性能的水性聚苯胺纳米复合材料的简便方法

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摘要

Waterborne polyaniline (PANI) dispersion has got extensive attention due to its environmental friendliness and good processability, whereas the storage stability and mechanical property have been the challenge for the waterborne PANI composites. Here we prepare for waterborne PANI dispersion through the chemical graft polymerisation of PANI into epichlorohydrin modified poly (vinyl alcohol) (EPVA). In comparison with waterborne PANI dispersion prepared through physical blend and in situ polymerisation, the storage stability of PANI-g-EPVA dispersion is greatly improved and the dispersion keeps stable for one year. In addition, the as-prepared PANI-g-EPVA film displays more uniform and smooth morphology, as well as enhanced phase compatibility. PANI is homogeneously distributed in the EPVA matrix on the nanoscale. PANI-g-EPVA displays different morphology at different aniline content. The electrical conductivity corresponds to 7.3 S/cm when only 30% PANI is incorporated into the composites, and then increases up to 20.83 S/cm with further increase in the aniline content. Simultaneously, the tensile strength increases from 35 MPa to 64 MPa. The as-prepared PANI-g-EPVA dispersion can be directly used as the conductive ink or coatings for cellulose fibre paper to prepare flexible conductive paper with high conductivity and mechanical property, which is also suitable for large scalable production.
机译：水性聚苯胺（PANI）分散体因其对环境友好和良好的加工性能而受到广泛关注，而储存稳定性和机械性能一直是水性PANI复合材料所面临的挑战。在这里，我们通过将PANI化学接枝聚合为环氧氯丙烷改性的聚乙烯醇（EPVA），为水性PANI分散体做准备。与通过物理共混和原位聚合制备的水性PANI分散体相比，PANI-g-EPVA分散体的储存稳定性大大提高，并且分散体保持稳定一年。另外，所制备的PANI-g-EPVA膜显示出更均匀和光滑的形态，以及增强的相相容性。 PANI在纳米级的EPVA基质中均匀分布。 PANI-g-EPVA在不同的苯胺含量下表现出不同的形态。当仅将30％PANI掺入复合材料时，电导率相当于7.3 S / cm，然后随着苯胺含量的进一步增加，电导率增加至20.83 S / cm。同时，抗拉强度从35 MPa增加到64 MPa。所制得的PANI-g-EPVA分散液可直接用作纤维素纤维纸的导电油墨或涂料，以制备具有高导电性和机械性能的柔性导电纸，也适用于大规模生产。

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