Self-Assembly of Ultralarge Graphene Oxide Nanosheets and Alginate into Layered Nanocomposites for Robust Packaging Materials

被引：21
作者：
Weng, Sunny X. [1 ]
Yousefi, Nariman [1 ]
Tufenkji, Nathalie [1 ]
机构：
[1] McGill Univ, Dept Chem Engn, 3610 Univ St, Montreal, PQ H3A 0C5, Canada
来源：
ACS APPLIED NANO MATERIALS | 2019年 / 2卷 / 03期
基金：
加拿大自然科学与工程研究理事会; 加拿大创新基金会;
关键词：
food packaging; liquid crystal; biopolymer; self-assembly; nacre; moisture barrier; nanocomposite; MECHANICAL-PROPERTIES; NACRE; WATER; FILMS; TRANSPARENT; REDUCTION; TOUGHNESS; STRENGTH; OXYGEN;
D O I：
10.1021/acsanm.8b02323
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The assembly of graphene oxide (GO) nanosheets into bioinspired nacre-like nanocomposites is a potential strategy for the development of robust alternative packaging materials. At sufficiently high concentrations, the self-assembly of ultralarge GO into liquid crystals (LC) in colloidal suspensions with alginate biopolymer is observed. Studying freeze-dried partially cast nanocomposites reveals the gradual reorientation and merging of these LC domains during evaporation. Evaporation of LC alginate-GO suspensions yields nanocomposite films with highly ordered layered microstructures, with excellent mechanical properties, thermal stability, and moisture barrier performance. Spectroscopic studies and comparison with theoretical models establish the role of hydrogen-bonding interactions between the components and confirm the parallel alignment of ultralarge GO above 2 wt %, corresponding to the formation of LC domains in aqueous suspension. The insights afforded by this study can help guide the commercial development of strong, environmentally friendly biopolymer-GO nanocomposites.
引用
收藏
页码：1431 / 1444
页数：27
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