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首页> 外文期刊>Journal of Applied Polymer Science >Polymer electrolyte membrane with nanomatrix channel prepared by sulfonation of natural rubber grafted with polystyrene
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Polymer electrolyte membrane with nanomatrix channel prepared by sulfonation of natural rubber grafted with polystyrene

机译：聚苯乙烯接枝天然橡胶磺化制备的具有纳米基质通道的高分子电解质膜。

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摘要

High-proton-conductive polymer electrolyte with a nanomatrix channel was prepared by graft copolymerization of styrene onto deproteinized natural rubber followed by sulfonation with chlorosulfonic acid. First, natural rubber latex was purified with urea in the presence of surfactant to remove almost all proteins present in the rubber. Second, graft copolymerization of styrene onto deproteinized natural rubber was carried out with tert-butyl hydroperoxide/tetraethylenepentamine as an initiator at 30°C in latex stage. The graft-copolymerized natural rubber (DPNR-graft-PS) was sulfonated with chlorosulfonic acid in chloroform solution at an ambient temperature. The resulting sulfonated DPNR-graft-PS was characterized by FTIR spectroscopy, solid state 13C CP/MAS NMR spectroscopy, elemental analysis, and transmission electron microscopy. High proton conductivity of about 0.1 S/cm, less water uptake of 24 wt % and comparatively good stress at break of 9 MPa were accomplished at suitable contents of styrene units and sulfur, i.e., 32 wt % and 75 mol %, respectively. The high proton conductivity, excellent stability, and good mechanical properties were associated with not only the formation of the nanomatrix channel but also a specific concentration of sulfuric acid group.
机译：通过将苯乙烯接枝共聚到脱蛋白的天然橡胶上，然后用氯磺酸进行磺化，制备具有纳米基质通道的高质子传导性聚合物电解质。首先，在表面活性剂存在下用尿素纯化天然橡胶胶乳，以除去橡胶中几乎所有存在的蛋白质。其次，在乳胶阶段中，以叔丁基氢过氧化物/四亚乙基五胺为引发剂，将苯乙烯接枝共聚到脱蛋白的天然橡胶上。在环境温度下，用氯磺酸在氯仿溶液中磺化接枝共聚的天然橡胶（DPNR-graft-PS）。通过FTIR光谱，固态13C CP / MAS NMR光谱，元素分析和透射电子显微镜表征所得的磺化DPNR-接枝-PS。在合适的苯乙烯单元和硫含量，即分别为32wt％和75mol％的情况下，实现了约0.1S / cm的高质子传导率，更少的24wt％的吸水率和9MPa的相对较好的断裂应力。高质子传导性，优异的稳定性和良好的机械性能不仅与纳米基质通道的形成有关，而且与特定浓度的硫酸基团有关。

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