Clay-graphene oxide liquid crystals and their aerogels: synthesis, characterization and properties

被引：11
作者：
Ye, Sisi [1 ]
Yang, Zhihong [1 ]
Xu, Jianmei [1 ]
Shang, Zehao [1 ]
Xie, Jing [1 ]
机构：
[1] China Univ Geosci, Fac Mat Sci & Chem, Wuhan 430074, Hubei, Peoples R China
来源：
ROYAL SOCIETY OPEN SCIENCE | 2019年 / 6卷 / 02期
关键词：
graphene oxide; montmorillonite; liquid crystals; aerogel; RHEOLOGICAL PROPERTIES; METHYL-ORANGE; REMOVAL; LIGHTWEIGHT; FIBERS;
D O I：
10.1098/rsos.181439
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
The dispersions containing two kinds of layered solids-graphene oxide (GO) and exfoliated montmorillonite (MMT) were mainly prepared, following which the binary aerogels were synthesized. The results indicate that the formation of liquid crystals (LCs) occurs at lower GO concentration and the birefringence becomes stronger when MMT is introduced into GO dispersion. Sol-gel transition forms in the binary suspensions with different mass fractions of MMT and GO. LCs with highly ordered alignment are observed in the gel and the fraction of LCs obviously increases with the increase in GO concentration. Moreover, the birefringence is observed in MMT-GO binary aerogels with the interconnected three-dimensional porous network, which is attributed to the ordered arrangement of MMT and GO nanosheets in pore walls. Among the aerogels with different MMT/GO ratios, the samples at the ratio of 10 :1 show better adsorption capacity and removal percentage of cationic and anionic dyes.
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页数：9
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