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Borate Cross-Linking Chitosan/Graphene Oxide Films: Toward the Simultaneous Enhancement of Gases Barrier and Mechanical Properties

文献类型: 会议论文

第一作者: Ning Yan

作者: Ning Yan 1 ; Filomena Capezzuto 1 ; Giovanna G. Buonocore 1 ; Fabiana Tescione 1 ; Marino Lavorgna 1 ; Hesheng Xia 2 ; Luigi Ambrosio 1 ;

作者机构: 1.Institute of Polymers, Composites and Biomaterials, National Research Council, P. le Fermi, 1-80055 Portici, NA, Italy

2.State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China

关键词: graphene oxide;tensile strength;crosslinked

会议名称: International Conference GT70

主办单位:

页码: 020018-1-020018-4

摘要: Borate adducts, originated from hydrolysis of sodium tetraborate decahydrate (borax), have been used to crosslink chitosan (CS) and graphene oxide (GO) nanosheets for the production of innovative composite sustainable materials. CS/GO film consisting of 10wt% borax and lwt% GO exhibits a significant improvement of both toughness and oxygen barrier properties in comparison to pristine chitosan. In particular the tensile strength increases by about 100% and 150% after thermal annealing of samples at 90°C for 50min whereas the oxygen permeability reduces of about 90% compared to pristine chitosan. The enhancement of both mechanical and barrier properties is ascribed to the formation of a resistant network due to the chemical crosslinking, including borate orthoester bonds and hydroxyl moieties complexes, formed among borate ions, chitosan, and GO nanoplatelets. The crosslinked graphene-based chitosan material with its enhanced mechanical and barrier properties may significantly broad the range of applications of chitosan based-materials which presently are very limited and addressed only to packaging.

分类号: o63-532

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