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首页> 外文期刊>ACS applied materials & interfaces >Flexible Poly(vinyl chloride) Nanocomposites Reinforced with Hyperbranched Polyglycerol-Functionalized Graphene Oxide for Enhanced Gas Barrier Performance
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Flexible Poly(vinyl chloride) Nanocomposites Reinforced with Hyperbranched Polyglycerol-Functionalized Graphene Oxide for Enhanced Gas Barrier Performance

机译：柔性聚（氯乙烯）纳米复合材料加强了具有超胆总聚甘油官能化的石墨烯氧化物，用于增强阻气性能

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摘要

Herein, we describe the preparation of flexible poly(vinyl chloride) (PVC) containing hyperbranched polyglycerol(HPG)-functionalized graphene oxide (HGO) as a reinforcing filler and reveal that the obtained composites exhibit greatly improved gas barrier properties. Moreover, we show that HGO, synthesized by surface initiated ring-opening polymerization of glycidol followed by esterification with butyric anhydride, exists as individual exfoliated nanosheets possessing abundant functional groups capable of interacting with PVC. A comparative study of butyl-terminated graphene oxide (BGO) reveals that functionalization with HPG is of key importance for achieving a uniform dispersion of HGO in the PVC matrix and results in strong interfacial interactions between HGO and PVC. As a result, flexible PVC/HGO nanocomposite films exhibit significantly enhanced tensile strength and toughness compared to those of neat plasticized PVC while maintaining its inherent stretchability. Furthermore, the, two-dimensional planar structure and homogeneous distribution of HGO in PVC/HGO nanocomposites make gas molecules follow a highly tortuous path, resulting in remarkably reduced oxygen permeability, which is more than 60% lower than that of neat plasticized PVC. ansequently, HGO is demonstrated to be promising component of flexible and gas:impermeable PVC films for a wide range of applications.
机译：在此，我们描述了含有超支化聚甘油（HPG） - 官能化的石墨烯氧化物（HGo）的柔性聚（氯乙烯）（PVC）的制备作为增强填料，并揭示所得复合材料表现出极大地改善的阻气性。此外，我们表明，通过表面引发的缩水甘油的开环聚合合成的HgO，其次用丁二酸酐与丁二酸酯，作为具有能够与PVC相互作用的丰富官能团的单独的剥离纳米片存在。丁基封端的石墨烯氧化物（BGO）的比较研究表明，具有HPG的官能化对于在PVC基质中实现HGO均匀分散的重要性，并导致HGO和PVC之间的强界面相互作用。结果，与纯增塑PVC相比，柔性PVC / HgO纳米复合膜表现出显着提高的拉伸强度和韧性，同时保持其固有的拉伸性。此外，PVC / HgO纳米复合材料中HGo的二维平面结构和HgO的均匀分布使气体分子遵循高度曲折的路径，从而显着降低透氧性，其比整齐的塑化PVC低60％。然后，HGo被证明是柔性气体的有前途的组成部分：可渗透的PVC薄膜，适用于各种应用。

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