Cold sintering process for fabrication of a superhydrophobic ZnO-polytetrafluoroethylene(PTFE)ceramic composite  

作　　者：Xuetong Zhao Yang Yang Li Cheng Jing Guo Shenglin Kang Yuchen Li Xilin Wang Lijun Yang Ruijin Liao 

机构地区：[1]State Key Laboratory of Power Transmission Equipment&System Security and New Technology,Chongqing University,Chongqing 400044,China [2]State Key Laboratory for Mechanical Behavior of Materials,Xi’an Jiaotong University,Xi’an 710049,China [3]Engineering Laboratory of Power Equipment Reliability in Complicated Coastal Environments,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen 518055,China

出　　处：《Journal of Advanced Ceramics》2023年第9期1758-1766,共9页先进陶瓷（英文）

基　　金：The authors acknowledge the support from the funding of the National Natural Science Foundation of China(Grant No.51877016);the Fok Ying-Tong Education Foundation,China(Grant No.171050);Science and Technology Project of State Grid Co.,Ltd.,China(Grant No.5500-202399372A-2-2-ZB).

摘　　要：Composite coatings or films with polytetrafluoroethylene(PTFE)are typically utilized to offer superhydrophobic surfaces.However,the superhydrophobic surfaces usually have limited durability and require complicated fabrication methods.Herein,we report the successful integration of PTFE with ZnO ceramics to achieve superhydrophobicity via a one-step sintering method,cold sintering process(CSP),at 300℃.(1–x)ZnO–x PTFE ceramic composites with x ranging from 0 to 70 vol%are densified with relative density of over 97%.Micro/nano-scale PTFE polymer is dispersed among ZnO grains forming polymer grain boundary phases,which modulate surface morphology and surface energy of the ZnO–PTFE ceramic composites.For the 60 vol%ZnO–40 vol%PTFE ceramic composite,superhydrophobic properties are optimized with static water contact angles(WCAs)and sliding angles(SAs)of 162°and 7°,respectively.After abrading into various thicknesses(2.52,2.26,and 1.99 mm)and contaminating with graphite powders on the surface,WCA and SA are still maintained with a high level of 157°–160°and 7°–9.3°,respectively.This work indicates that CSP provides a promising pathway to integrate polymers with ceramics to realize stable superhydrophobicity.

关 键 词：cold sintering process(CSP) ZnO-polytetrafluoroethylene(PTFE)ceramic composites contact angles sliding angles(SAs) SUPERHYDROPHOBICITY 

分 类 号：TB332[一般工业技术—材料科学与工程]