Sodium deoxycholate functionalized graphene and its composites with polyvinyl alcohol

被引：17
作者：
Wang, Lanwei [1 ]
Liao, Ruijuan [1 ]
Tang, Zhenghai [1 ]
Lei, Yanda [1 ]
Guo, Baochun [1 ,2 ]
机构：
[1] S China Univ Technol, Dept Polymer Mat & Engn, Guangzhou 510640, Peoples R China
[2] S China Univ Technol, State Key Lab Pulp & Paper Engn, Guangzhou 510640, Peoples R China
来源：
JOURNAL OF PHYSICS D-APPLIED PHYSICS | 2011年 / 44卷 / 44期
基金：
中国国家自然科学基金;
关键词：
CARBON NANOTUBES; NONCOVALENT FUNCTIONALIZATION; MECHANICAL-PROPERTIES; AQUEOUS DISPERSIONS; GRAPHITE OXIDE; FILMS; SOLUBILIZATION; EXFOLIATION; WATER; NANOCOMPOSITES;
D O I：
10.1088/0022-3727/44/44/445302
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Sodium deoxycholate (SDC), a kind of bile derivative, is used to noncovalently functionalize graphene. Stable and high concentration (up to 20 mg ml(-1)) of graphene colloid is obtained. The stabilization mechanism is revealed to be hydrophobic interaction, electrostatic repulsion and hydrogen bonding. Single-layer and few-layer graphene are obtained in the colloid. Subsequently, the obtained graphene sheets are incorporated into a polyvinyl alcohol (PVA) matrix by solution casting to fabricate PVA/graphene composites. Morphological observations substantiate the homogeneous dispersion of graphene in the PVA matrix and strong interfacial adhesion between them. Significant improvements in tensile strength and modulus of the composite films are observed.
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页数：9
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