Graphene Oxide-Graft-Poly(l-lactide)/Poly(l-lactide) Nanocomposites: Mechanical and Thermal Properties

Polymers

Jun-Chao Wei¹  Pei-Yao Guo Wang¹  Li-Na Wang² 

[1] College of Chemistry, Nanchang University, Nanchang 330031, China;College of Science, Nanchang Institute of Technology, Nanchang 330029, China;

关键词: graphene;    poly(l-lactide);    surface modification;    nanocomposite;   

DOI  :  10.3390/polym9090429

来源: DOAJ

【 摘 要 】

The surface modification of graphene sheets with polymer chains may greatly hinder its aggregation and improve its phase compatibility with a polymer matrix. In this work, poly(l-lactic acid)-grafted graphene oxide (GO-g-PLLA) was prepared via a simple condensation polymerization method, realizing its dispersion well in organic solvents, which demonstrated that the surface of GO changed from hydrophilic to hydrophobic. GO-g-PLLA can disperse homogeneously in the PLLA matrix, and the tensile test showed that the mechanical properties of GO-g-PLLA/PLLA were much better than that of GO/PLLA; compared with GO, only 3% GO-g-PLLA content can realize a 37.8% increase in the tensile strength for their PLLA composites. Furthermore, the differential scanning calorimetry (DSC) and polarized optical microscopy (POM) results demonstrated that GO-g-PLLA shows a nucleating agent effect and can promote the crystallization of PLLA.

【 授权许可】

Unknown