Organosilicon leather coating technology based on carbon peak strategy  

作　　者：Wenkai Wang Haojun Fan Lijiang Song Zhenya Wang Heng Li Jun Xiang Qiang Huang Xiangquan Chen 

机构地区：[1]Key Laboratory of Leather Chemistry and Engineering of Ministry of Education,Sichuan University,Chengdu 610065,China [2]Department of Chemistry,University of Warwick,Coventry CV47AL,UK [3]Chengdu Guibao Science and Technology Co.Ltd,Chengdu 610041,China.

出　　处：《Journal of Leather Science and Engineering》2022年第1期369-379,共11页皮革科学与工程（英文）

基　　金：the National Natural Science Foundation of China(Project No.22178238);the Pioneers&Leader Research and Development Program of Zhejiang Province(Project No.2022C01190).

摘　　要：Based on the demand of carbon peak and carbon emission reduction strategy, divinyl-terminated polydimethyl-siloxane (ViPDMSVi), poly(methylhydrosiloxane) (PMHS), divinyl-terminated polymethylvinylsiloxane (ViPMVSVi), and fumed silica were used as primary raw materials, polydimethylsiloxane (PDMS) synthetic leather coating was in situ constructed by thermally induced hydrosilylation polymerization on the synthetic leather substrate. The effect of the viscosity of ViPDMSVi, the active hydrogen content of PMHS, the molar ratio of vinyl groups to active hydrogen, the dosage of ViPMVSVi and fumed silica on the performance of PDMS polymer coating, including mechanical properties, cold resistance, flexural resistance, abrasion resistance, hydrophobic and anti-fouling properties were investigated. The results show that ViPDMSVi with high vinyl content and PMHS with low active hydrogen content is more conducive to obtaining organosilicon coating with better mechanical properties, the optimized dosage of ViPMVSVi and fumed silica was 7 wt% and 40 wt%, respectively. In this case, the tensile strength and the broken elongation of the PDMS polymer coating reached 5.96 MPa and 481%, showing reasonable mechanical properties for leather coating. Compared with polyurethane based or polyvinyl chloride based synthetic leather, the silicon based synthetic leather prepared by this method exhibits excellent cold resistance, abrasion resistance, super hydrophobicity, and anti-fouling characteristics.

关 键 词：PDMS polymer coating Synthetic leather In situ hydrosilylation Coating performance Carbon peak strategy 

分 类 号：TS544[轻工技术与工程—皮革化学与工程]