Yuan Mingwei, Xiong Chengdong, Jiang Lin, Li Hongli, Yuan Minglong
Engineering Research Center of Biopolymer Functional Materials of Yunnan, Yunnan Minzu University, Kunming 650500, China.
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China.
Materials (Basel). 2018 Feb 23;11(2):323. doi: 10.3390/ma11020323.
Graphene oxide (GO) was employed for the preparation of GO-zinc oxide (ZnO). The hydroxyl group on the surface was exploited to trigger the l-lactide ring-opening polymerization. A composite material with poly(l-lactide) (PLLA) chains grafted to the GO-ZnO surface, GO-ZnO-PLLA, was prepared. The results demonstrated that the employed method allowed one-step, rapid grafting of PLLA to the GO-ZnO surface. The chemical structure of the GO surface was altered by improved dispersion of GO-ZnO in organic solvents, thus enhancing the GO-ZnO dispersion in the PLLA matrix and the interface bonding with PLLA. Subsequently, composite films, GO-ZnO-PLLA and GO-ZnO-PLLA/PLLA, were prepared. The changes in interface properties and mechanical properties were studied. Furthermore, the antibacterial performance of nano-ZnO was investigated.
氧化石墨烯（GO）被用于制备氧化石墨烯-氧化锌（ZnO）。利用其表面的羟基引发左旋丙交酯的开环聚合反应。制备了一种复合材料，其表面接枝有聚（左旋丙交酯）（PLLA）链，即GO-ZnO-PLLA。结果表明，所采用的方法能够将PLLA一步快速接枝到GO-ZnO表面。通过改善GO-ZnO在有机溶剂中的分散性，改变了GO表面的化学结构，从而增强了GO-ZnO在PLLA基体中的分散性以及与PLLA的界面结合力。随后，制备了复合薄膜GO-ZnO-PLLA和GO-ZnO-PLLA/PLLA。研究了界面性能和力学性能的变化。此外，还研究了纳米ZnO的抗菌性能。
