文献类型：期刊文献

英文题名：Superhydrophobic polyurea coating with excellent adhesion and abrasion resistance prepared via convenient microphase separation

作者：Zhang, Yan[1];Wang, Ting[1];Si, Haofei[1];Liu, Yujian[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Specially Funct Polymer Mat & Related Tech, Minist Educ, Shanghai, Peoples R China

年份：2022

卷号：170

外文期刊名：PROGRESS IN ORGANIC COATINGS

收录：;EI(收录号：20222612294578);WOS:【SCI-EXPANDED(收录号:WOS:000861497400003)】；

基金：Acknowledgments The work was supported by the Fundamental Research Funds for the Central Universities (JKD01211701) .

语种：英文

外文关键词：Superhydrophobic; Microphase separation; Polyurea; siloxane; Adhesion; Abrasion resistance

摘要：The alicyclic and aliphatic polyurea/siloxane block copolymer PDMS20000-PUA and PDMS3000-PUA were synthesized, respectively. And they were selected as the matrix individually and together to fabricate robust superhydrophobic coating by convenient microphase separation method. The molecules of PDMS3000-PUA formed rough spiky aggregates under strong hydrogen bond force, and its contact angle (CA) reaches 132.5 degrees. While those of PDMS20000-PUA assembled into tiny hemispheres with a diameter of 0.54 mu m, and its CA is just 114.3 degrees for low roughness. The influence of blend and solvent composition on the surface morphology was further studied. It was found that porous hierarchical structures are generated through microphase separation of partial thermodynamic compatible PDMS20000-PUA and PDMS3000-PUA. The contact angle of the coatings reaches the maximum value of 141.7 degrees in 1:1 (v/v) tetrahydrofuran/isopropanol solvent with a hydrogen bonding value of 5.95 and a solubility parameter of 10.35 x 103(Cal/m3)0.5. By further improving blade coating to spray coating, the prepared surface exhibits excellent superhydrophobicity with a contact angle of 159.6 degrees and a sliding angle of 3.1 degrees. Moreover, the coatings also possess superior adhesion and wear resistance.