Abstract
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.
Highlights
The increasing severity of global white pollution caused by food packing materials, in addition to the petroleum crisis, has promoted studies on green and eco-friendly food packaging materials that are renewable, degradable, and non-toxic
In the experiment of preparing graphene oxide (GO)-zinc oxide (ZnO)/PLLA blend compound, we found that the chloroform dissolved comparison experiment of preparing GO-ZnO/PLLA blend compound, we found that the chloroform in GO-ZnO/PLLA after 12 h statics was divided into two phases
The on hydroxyl groupwas on the surface was GO was employed theemployed preparation
Summary
The increasing severity of global white pollution caused by food packing materials, in addition to the petroleum crisis, has promoted studies on green and eco-friendly food packaging materials that are renewable, degradable, and non-toxic. Green and renewable polymers such as polylactide (PLLA), polyglycolic acids, and polyamino acids have been developed and widely applied in food packaging research. The use of green, renewable, and degradable materials in rePLLAcing conventional petroleum PLLAstics is an effective means to further ensure food safety, environmental protection, and resource conservation; it is the trend of technical development and the goal of scientists. Inorganic nanomaterial-PLLA composite films can potentially be developed as next-generation food-packaging materials. Inorganic nanoparticles and nanowires have been applied to modify materials such as PLLA and solve their barrier issues. The results have indicated that the use of nanomaterials yields effective improvements
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