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首页> 外文期刊>Polymers for advanced technologies >In-situ thermal reduction and effective reinforcement of graphene nanosheet/poly (ethylene glycol)/poly (lactic acid) Nanocomposites
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In-situ thermal reduction and effective reinforcement of graphene nanosheet/poly (ethylene glycol)/poly (lactic acid) Nanocomposites

机译：石墨烯纳米片/聚（乙二醇）/聚（乳酸）纳米复合材料的原位热还原及有效增强

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摘要

This study aims to achieve a molecule-level dispersion of graphene nanosheets (GNSs) and a maximum interfacial interaction between GNSs and a polymer matrix. GNS-reinforced poly (ethylene glycol) (PEG)/poly (lactic acid) (PLA) nanocomposites are obtained by a facile and environment-friendly preparation method. Graphite oxide and GNSs are characterized by atomic force microscopy, Raman spectroscopy, and X-ray diffraction. Scanning electron microscopy shows that the state of dispersion of the GNS in the PEG/PLA matrix is distribution. The tensile strength and Young's modulus increases by 45% and 188%, respectively, with the addition of 4.0 wt% GNSs. The thermal stability of the GNS-based nanocomposites also improves. Differential scanning calorimetry indicates that GNSs have no remarkable effect on the crystallinity of the nanocomposites. The effective reinforcement of the nanocomposites is mainly attributed to the highly strong molecular-level dispersion of the GNSs in the polymer matrix.
机译：这项研究旨在实现石墨烯纳米片（GNSs）的分子水平分散以及GNS和聚合物基质之间的最大界面相互作用。 GNS增强的聚（乙二醇）（PEG）/聚（乳酸）（PLA）纳米复合材料是通过一种简便且环保的制备方法获得的。氧化石墨和GNS的特征在于原子力显微镜，拉曼光谱和X射线衍射。扫描电子显微镜显示，GNS在PEG / PLA基质中的分散状态为分布状态。通过添加4.0 wt％的GNS，拉伸强度和杨氏模量分别增加了45％和188％。基于GNS的纳米复合材料的热稳定性也得到改善。差示扫描量热法表明，GNS对纳米复合材料的结晶度没有显着影响。纳米复合材料的有效增强主要归因于GNS在聚合物基质中的高度强大的分子水平分散。

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