POSS/有机硅改性聚丙烯酸酯无氟防水剂的合成与应用研究

Synthesis and Application of POSS/ Silicone Modified Polyacrylate Fluoride-free Waterproof Agent

摘要:

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。利用傅里叶红外光谱(FT-IR)和傅里叶红外光谱(DLS)对聚丙烯酸酯的结构及乳胶粒的粒径大小进行了表征，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)为6:4时，单体的转化率最大为96.97%，乳液的凝胶率为0.14%，乳胶粒的粒径最小为104.8 nm，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纳米颗粒。无氟防水剂赋予棉织物纤维表面低的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。

Abstract:

POSS/silicone modified polyacrylate fluorine-free waterproofing agent was synthesized by soap-free emulsion polymerization technology and applied to cotton fabric finishing. The effect of the ratio of soft and hard monomers on the emulsion, latex film and its application performance was investigated. The structure of polyacrylate and the size of latex particles were characterized by fourier transform infrared spectrum (FT-IR) and dynamic laser scatterometer (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 scanning electron microscope (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 latex particles 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, good softness, and its water contact angle was 161?. SEM results showed that functional POSS nanoparticles existed on the surface of cotton fiber. The fluorine-free waterproofing agent endows the cotton fabric with low surface energy and certain rough structure, so that the finished cotton fabric exhibits superhydrophobicity.