POSS/有机硅改性聚丙烯酸酯无氟防水剂的合成与应用

Synthesis and application of POSS/organosilicone modified polyacrylate fluoride-free waterproof agent

以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、丙烯酸羟乙酯(HEA)和功能化多面体低聚倍半硅氧烷(POSS)为原料,通过无皂乳液聚合技术合成了POSS/有机硅改性聚丙烯酸酯无氟防水剂,并将其应用于棉织物整理。考察了软硬单体配比对乳液、乳胶膜及其应用性能的影响。利用FTIR和DLS对POSS/有机硅改性聚丙烯酸酯的结构及乳液的粒径进行了表征,利用伺服材料多功能高低温控制试验机、柔软度仪、SEM对整理织物的应用性能及表面形貌进行了表征。结果表明,当m(BA)∶m(MMA)=6∶4时,单体转化率最大,为96.97%,乳液凝胶率为0.14%,乳液的粒径最小,为104.8nm,乳胶膜对水的接触角最大,可达114.3°,并具有优异的耐水性。整理棉织物表现出优异的力学性能和良好的柔软度,其对水的接触角可达161°。SEM结果表明,棉织物纤维表面存在功能化POSS纳米粒子。无氟防水剂赋予棉织物纤维表面低的表面能和一定的粗糙结构,从而使整理棉织物表现出超疏水性能。无氟防水剂对棉织物的透湿性、透气性、白度几乎没有影响,并赋予了整理棉织物良好的抗菌性。

Polyhedral oligomeric silsesquioxane(POSS)/organosilicone modified polyacrylate fluorine-free waterproof agent was synthesized by soap-free emulsion polymerization technology using methyl methacrylate(MMA),butyl acrylate(BA),hydroxyethyl acrylate(HEA)and functional POSS as raw materials.Then it was applied to cotton fabric finishing.The influence of ratio of soft and hard monomers on the emulsion,latex film and its application performance was investigated.The structure of POSS/organosilicone modified polyacrylate and the particle size of the latex were characterized by FTIR and DLS.And the application properties and surface morphology of the finished fabric were characterized by servo material multifunctional high and low temperature control testing machine,softness meter,and SEM.The results showed that when m(BA)∶m(MMA)was 6∶4,the maximum conversion rate of monomer was 96.97%,the gel rate of emulsion was 0.14%,the minimum size of the latex was 104.8 nm,as well as the latex film had the maximum water contact angle of 114.3°and excellent water resistance.The finished cotton fabric showed excellent mechanical properties and good softness with a water contact angle of 161°.SEM results revealed that there were functional POSS nanoparticles on the surface of cotton fibric.This fluorine-free waterproof agent endowed the cotton fabric with low surface energy and certain rough structure,so that the finished cotton fabric exhibited superhydrophobicity.Moreover,the fluorine-free waterproof agent had little effect on moisture permeability,air permeability and whiteness of cotton fabric,and made finished cotton fabric with good antibacterial property.