中文摘要：

以蒙脱土（MMT）和石墨烯（rGO）为填料，一步法制备了MMT-rGO／PVA纳米复合材料，并研究了不同MMT／rGO比例对PVA复合膜力学性能的影响．结果表明，剥离的MMT片层能够有效阻止石墨烯在被还原过程中的团聚．MMT—rGO二元填料与PVA间形成氢键，极大地改善了填料与聚合物间的界面结合，能够协同提高PVA复合膜的力学性能．1wt％MMT—GE（2：1）／PVA复合材料的拉伸强度和杨氏模量最高，分别为85．1MPa和1627．8MPa，比纯PVA分别提高了46％和62％．此方法为制备高性能聚合物复合材料提供了有效的途径．

英文摘要：

Exfoliated montmorillonite （MMT） and reduced graphene oxide （rGO） hybrids reinforced poly （vinyl alcohol） （PVA） nanocomposites were prepared via a one-step method. The reduction of graphene oxide （GO） was directly performed in the presence of exfoliated MMT sheets, which effectively prevented the restack of graphene sheets in PVA aqueous solution. The results showed that the interracial interaction between MMT-rGO hybrids and PVA matrix can be significantly improved by hydrogen bonds. The incorporation of MMT-rGO hybrids into PVA resulted in greatly enhanced tensile properties due to the well dispersion and strong interracial interaction, which were higher than those of PVA nanocomposites with MMT or rGO individually. The influence of the ratio between MMT and rGO was also investigated. The tensile strength and Young s modulus of the 1 wt% MMT-rGO （2：1 ）/PVA composites are 85.1 MPa and 1627.8 MPa, respectively, which increased by 46% and 62% compared to those of pure PVA films. The method developed in this study makes an effective way to fabricate hybrid reinforcements for the preparation of high-performance polymer composites.