Based on the demand of carbon peak and carbon emission reduction strategy, divinyl-terminated polydimethylsiloxane (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.

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基于碳峰策略的有机硅皮革涂层技术

根据碳峰需求和碳减排策略，以二乙烯基封端聚二甲基硅氧烷（ViPDMSVi）、聚甲基氢硅氧烷（PMHS）、二乙烯基封端聚甲基乙烯基硅氧烷（ViPMVSVi）和气相二氧化硅为主要原料，聚二甲基硅氧烷（PDMS） ) 合成革涂层是通过热诱导氢化硅烷化聚合在合成革基材上原位构建的。ViPDMSVi的粘度、PMHS的活性氢含量、乙烯基与活性氢的摩尔比、ViPMVSVi和气相二氧化硅的用量对PDMS聚合物涂层性能的影响，包括力学性能、耐寒性、抗弯性、研究了耐磨性、疏水性和防污性。结果表明，高乙烯基含量的ViPDMSVi和低活性氢含量的PMHS更有利于获得具有更好机械性能的有机硅涂层，ViPMVSVi和气相二氧化硅的优化用量分别为7 wt%和40 wt%。在这种情况下，PDMS聚合物涂层的拉伸强度和断裂伸长率分别达到了5.96 MPa和481%，表现出合理的皮革涂层力学性能。与聚氨酯基或聚氯乙烯基合成革相比，该方法制备的硅基合成革具有优异的耐寒性、​​耐磨性、超疏水性和防污性。ViPMVSVi 和气相二氧化硅的优化用量分别为 7 wt% 和 40 wt%。在这种情况下，PDMS聚合物涂层的拉伸强度和断裂伸长率分别达到了5.96 MPa和481%，表现出合理的皮革涂层力学性能。与聚氨酯基或聚氯乙烯基合成革相比，该方法制备的硅基合成革具有优异的耐寒性、​​耐磨性、超疏水性和防污性。ViPMVSVi 和气相二氧化硅的优化用量分别为 7 wt% 和 40 wt%。在这种情况下，PDMS聚合物涂层的拉伸强度和断裂伸长率分别达到了5.96 MPa和481%，表现出合理的皮革涂层力学性能。与聚氨酯基或聚氯乙烯基合成革相比，该方法制备的硅基合成革具有优异的耐寒性、​​耐磨性、超疏水性和防污性。