聚乳酸/氧化石墨烯纳米复合材料的界面调控与性能研究

doi:10.19491/j.issn.1001-9278.2019.01.016

中国塑料 ›› 2019, Vol. 33 ›› Issue (1): 93-97.DOI: 10.19491/j.issn.1001-9278.2019.01.016

聚乳酸/氧化石墨烯纳米复合材料的界面调控与性能研究

狄莹莹¹,任鹏刚²,宋丹萍²

1. 陕西工业职业技术学院
2. 西安理工大学

收稿日期:2018-08-21 修回日期:2018-10-16 出版日期:2019-01-26 发布日期:2019-02-25
基金资助:
国家自然科学基金（51573147）;陕西工业职业技术学院2018年度院级专项科研项目“石墨烯/PVDF复合材料的制备及力学性能研究”（ZK18-01）

Interface Control and Performance of Polylactide/Graphene Oxide Nanocomposites

Received:2018-08-21 Revised:2018-10-16 Online:2019-01-26 Published:2019-02-25

摘要/Abstract

摘要： 分别以乙二胺（EDA）、十二烷基胺（DA）和十八烷基胺（ODA）修饰的氧化石墨烯（GO）为填料，制备了具有不同界面结构的功能化聚乳酸(PLA)/氧化石墨烯(FGO)纳米复合薄膜。采用X射线衍射分析、扫描电子显微镜、热失重分析、差示扫描量热法对复合薄膜的材料结构、微观形貌和热性能进行表征，并研究了其力学性能及气体渗透性。结果表明，随着GO表面接枝分子链的增长，复合材料的热稳定性、力学性能及气体阻透性能提高；3种FGO中，GO-g-ODA改性体系的综合性能最佳，当其添加量为0.5 %（质量分数，下同）时，复合材料的拉伸强度和断裂伸长率分别达到88.52 MPa和9.68 %；氧气渗透系数由原来的4.21×10^13 cm3·cm/(cm2·s·Pa)下降到1.172×10^14 cm3·cm/(cm2·s·Pa)，约下降了97.2 %；此外，功能化石墨烯的加入使复合材料的热稳定性提高。

Abstract: Graphene oxide (GO) was firstly modified with ethylenediamine (EDA), dodecylamine (DA) and octadecylamine (ODA), and then functionalized graphene oxide (FGO) / poly (lactic acid) (PLA) nanocomposite films were prepared by hot pressing. The effects of GO-g-EDA, GO-g-DA and GO-g-ODA on the interfacial properties, mechanical properties, thermal stability and oxygen resistance of nanocomposites were studied. The results show that the combination property of composites is mainly depended on the chain length of the grafted molecular. the performance of composite filled with GO-g-ODA is superior to that filled with GO-g-EDA and GO-g-DA fillers . With addition of 0.5wt% GO-g-ODA loading, the tensile strength and elongation at break reach a maximum of 88.52MPa and 9.68%; the oxygen permeability coefficient decreased from 4.21×10-13 to 1.172×10-14 cm3cm/(cm2?s?Pa), about 97.2% decline. In addition, the thermal stability of PLA is also improved with the presence of functionalized graphene oxide.

狄莹莹任鹏刚宋丹萍. 聚乳酸/氧化石墨烯纳米复合材料的界面调控与性能研究[J]. 中国塑料, 2019, 33(1): 93-97.

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聚乳酸/氧化石墨烯纳米复合材料的界面调控与性能研究

Interface Control and Performance of Polylactide/Graphene Oxide Nanocomposites

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