High performance of poly(dopamine)-functionalized graphene oxide/poly(vinyl alcohol) nanocomposites
High performance of poly(dopamine)-functionalized graphene oxide/poly(vinyl alcohol) nanocomposites
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DOI：
10.1016/j.apsusc.2017.07.040
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发表时间：
2018-01-01
影响因子：
6.7
通讯作者：
Bao, Jianjun
中科院分区：
文献类型：
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作者：
Ma, Jiaojiao;Pan, Jingkai;Bao, Jianjun
本论文采用环境友好、工艺简单的方法制备了高性能的聚乙烯醇(PVA)/聚多巴胺功能化氧化石墨烯(PGO)纳米复合材料。GO首先被官能化，同时被聚多巴胺还原生成PGO。然后在水溶液中与PVA共混，制得PVA/PGO纳米复合材料。透射电子显微镜显示，PGO纳米片材在PVA基质中均匀分散，无规取向。同时，PGO的加入显著提高了PVA/PGO纳米复合材料的热性能和防水性能。加入0.7wt%的PGO后，纳米复合材料的降解温度比纯PVA高30℃以上，表现出良好的热稳定性。复合材料的水蒸气渗透率也降低到0.71×10(-12)g cm/(Cm2)S帕，相当于纯PVA的80%。此外，PVA/PGO纳米复合材料还表现出增强的导电性能。具有优异性能的PVA/PGO纳米复合材料在包装、电子、燃料电池工业、纤维等领域显示出巨大的应用前景。(C)2017年，由爱思唯尔出版。
In this paper, poly(vinyl alcohol) (PVA)/poly(dopamine)-functionalized graphene oxide (PGO) nanocomposites with high performance were prepared by an environment-friendly and facile strategy. GO was firstly functionalized and simultaneously reduced by poly(dopamine) to yield PGO. Then it was mixed with PVA in aqueous solution to make PVA/PGO nanocomposites. Transmission electron microscopy revealed that the PGO nanosheets are well dispersed and randomly oriented throughout the PVA matrix. At the same time, the thermal properties and water barrier properties of the PVA/PGO nanocomposites have been strikingly enhanced by the incorporation of PGO. The degradation temperature of the nanocomposites is more than 30 degrees C higher than that of pure PVA by the addition of 0.7 wt% PGO, which shows good thermal stability. The water vapor permeability of the nanocomposites also decreases to 0.71 x 10(-12) g cm/(cm(2) s Pa), corresponding to 80% reduction than that of pure PVA. Moreover, the PVA/PGO nanocomposites also present enhanced conductive properties. The PVA/PGO nanocomposites with such outstanding properties show great promising applications in the fields of packaging, electronics, fuel cell industry, fiber, and so on. (C) 2017 Published by Elsevier B.V.