个人信息Personal Information
副教授
博士生导师
硕士生导师
性别:男
毕业院校:吉林大学
学位:博士
所在单位:材料科学与工程学院
学科:材料表面工程
电子邮箱:ypli@dlut.edu.cn
Duty cycle dependent chemical structure and wettability of RF pulsed plasma copolymers of acrylic acid and octafluorocyclobutane
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论文类型:期刊论文
发表时间:2018-04-01
发表刊物:APPLIED SURFACE SCIENCE
收录刊物:SCIE、EI
卷号:436
页面范围:411-418
ISSN号:0169-4332
关键字:Plasma copolymerization; RF pulsed plasma; Superhydrophobicity; Superhydrophilicity; Tunable wettability; Surface adhesion
摘要:Octafluorocyclobutane and acrylic acid (C4F8-co-AA) plasma copolymer coatings are deposited using a pulsed wave (PW) radio frequency (RF) plasma on low density polyethylene (LDPE). The influence of duty cycle in pulsed process with the monomer feed rate on the surface chemistry and wettability of C4F8-co-AA plasma polymer coatings is studied. The concentration of the carboxylic acid (hydrophilic) groups increase, and that of fluorocarbon (hydrophobic) groups decrease by lowering the duty cycle. The combined effect of surface chemistry and surface morphology of the RF pulsed plasma copolymer coatings causes tunable surface wettability and surface adhesion. The gradual emergence of hydrophilic contents leads to surface heterogeneity by lowering duty cycle causing an increased surface adhesion in hydrophobic coatings. The C4F8-co-AA plasma polymer coatings on the nanotextured surfaces are tuned from repulsive superhydrophobicity to adhesive superhydrophobicity, and further to superhydrophilicity by adjusting the duty cycles with the monomer feed rates. (C) 2017 Elsevier B.V. All rights reserved.