Synthesis of Fluorinated Graphene Oxide and its Amphiphobic Properties

被引:111
|
作者
Mathkar, Akshay [1 ]
Narayanan, T. N. [1 ]
Alemany, Lawrence B. [2 ]
Cox, Paris [1 ]
Patrick Nguyen [1 ]
Gao, Guanhui [1 ]
Chang, Patricia [1 ]
Romero-Aburto, Rebeca [1 ,3 ]
Mani, Sendurai A. [3 ]
Ajayan, P. M. [1 ]
机构
[1] Rice Univ, Dept Mech Engn & Mat Sci, Houston, TX 77005 USA
[2] Rice Univ, Dept Chem, Shared Equipment Author, Smalley Inst Nanoscale Sci & Technol, Houston, TX 77005 USA
[3] Univ Texas MD Anderson Canc Ctr, Dept Mol Pathol, Houston, TX 77054 USA
基金
美国国家科学基金会;
关键词
graphene oxide; fluorinated graphite; superamphiphobic materials; surface wetting; chemical exfoliation; 2D nanomaterials; REDUCTION; ENERGY; FILMS;
D O I
10.1002/ppsc.201200091
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The richly functionalized basal plane bonded to polar organic moieties makes graphene oxide (GO) innately hydrophilic. Here, a methodology to synthesize fluorinated graphene oxide by oxidizing the basal plane of fluorinated graphite, allowing for tunable hydrophobicity of GO, is reported. Fluorine exists as tertiary alkyl fluorides covalently bonded to graphitic carbons, and using magic-angle spinning (MAS) 13C NMR as a primary tool chemical structures for the two types of synthesized fluorinated graphene oxides (FGOs) with significantly different fluorine contents are proposed. The low surface energy of the CF bond drastically affects GO's wetting behavior, leading to amphiphobicity in its highly fluorinated form. Ease of solution processing enables the fabrication of inks that are spray-painted on various porous/non-porous substrates. These coatings maintain amphiphobicity for solvents with surface tensions down to 59 dyn/cm, thus bypassing existing lithographic means to create similar surfaces. The approach towards fluorinating GO and fabricating graphene-based surfaces with tunable wettability opens the path towards unique, accessible, carbon-based amphiphobic coatings.
引用
收藏
页码:266 / 272
页数:7
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