Hydrophobicity and Adhesion of Aggregated Diamond Particles

被引:0
|
作者
Yao, Kaili [1 ,2 ]
Dai, Bing [1 ]
May, Paul W. [2 ]
Tan, Xiaojun [1 ]
Han, Jiecai [1 ]
Zhu, Jiaqi [1 ,3 ]
机构
[1] Harbin Inst Technol, Ctr Composite Mat & Struct, Harbin 150080, Peoples R China
[2] Univ Bristol, Sch Med, Bristol BS8 1TS, Avon, England
[3] Harbin Inst Technol, Key Lab Microsyst & Microstruct Mfg, Minist Educ, Harbin 150080, Peoples R China
来源
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE | 2021年 / 218卷 / 05期
基金
中国国家自然科学基金; 对外科技合作项目(国际科技项目);
关键词
adhesive force; aggregated diamond powders; etching; graphite; hydrophobicity; MICROWAVE PLASMA; WETTABILITY; FILMS; DEPOSITION; UNDERWATER; SURFACES; GROWTH; WENZEL;
D O I
10.1002/pssa.202000355
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Diamond powders with high hydrophobicity are prepared by etching graphite plates using a hydrogen/argon (H-2/Ar) plasma. The morphology and size of the diamond powders are found to vary with the proportion of Ar in H-2 from 0% to 50%. Wettability is measured using water contact angle (WCA) measurements giving values between 129.7 degrees and 146.9 degrees. The high hydrophobicity can be ascribed to the aggregated structure of the as-grown diamond powders. To check this assumption, the aggregated diamond powders are separated into individual particles by mechanical grinding; then, the WCAs of separated as-grown diamond powders and commercial dispersed diamond powders are compared. The separated diamond surfaces show the lower WCAs of 99.68 degrees and 96.96 degrees. The surface of the aggregated diamond powders also exhibits high adhesion to water. The diamond surface grown in 2% Ar suspends 40 mu L of water under a tilt angle of 180 degrees. Such aggregated diamond powders are promising for no-loss liquid transportation.
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页数:7
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