氧化石墨烯在纳米氧化镁/聚乳酸复合材料中的界面调节

摘要

Being located at the filler/matrix interfaces,Graphene oxide(GO) can act as a compatibilizer for the enhancement of interfacial adhesion. In this paper,GO,coved on the nano magnesia,can be reduced by Ethylenedi-amine. The hydrophilic surfaces of the magnesia were thus converted into hydrophobic owing to the reduced GO. The fundamental thermodynamic driving forces would make the hydrophobic GO encapsulated magnesia uniformly dispersed into the hydrophobic polylactic acid (PLA) matrix and build an excellent interfacial bonding between magnesia and PLA. The incorporation of MgO@GO significantly improved the mechanical properties, with the yield strength in-creasing from 66.4 MPa for pure PLA up to 69.4 MPa for PLA incorporated with MgO@GO.%位于填料/基体界面的氧化石墨烯(GO)可以作为提高界面粘合性的增容剂.在本文中,GO覆盖在纳米氧化镁(MgO)后,被乙二胺还原.因而氧化镁的亲水表面,可由此转化为GO的疏水表面.在热力学驱动力的作用下,疏水性包覆的MgO可以很容易地均匀分散在疏水性聚乳酸(PLA)基体中.通过GO的双亲作用,在MgO与PLA之间建立良好的界面结合.MgO@GO复合粒子的加入,提高了复合材料的机械性能,其屈服强度可从纯PLA的66.4 MPa增加至69.4 MPa.