新型含硅丙烯酸酯乳液的制备及拒水应用

Preparation and Application of New Acrylate Latex Water Repellent Modified with Organic Silicon

摘要:

采用半连续种子乳液聚合法，以多乙烯基硅油〔 Si(Tri)〕、γ-甲基丙烯酰氧丙基三（三甲基硅氧基）硅烷(TRIS)、甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)为主要原料，2,2'-偶氮二异丁基脒二盐酸盐(AIBA)为引发剂，阳离子型乳化剂十八烷基聚醚丙烯酸酯三甲基氯化铵(OATAC)和非离子型乳化剂异构十三醇聚氧乙烯基醚(DNS500)为复配乳化剂，甲基丙烯酸缩水甘油酯(GMA)为交联剂，制备出具有核壳结构的含硅丙烯酸酯乳液型拒水剂。研究了有机硅组分中Si(Tri)与TRIS的配比，GMA用量以及有机硅组分用量对乳液常规性能、乳胶膜的对水接触角、吸水率以及整理后棉织物拒水效果的影响。结果表明，所合成的含硅丙烯酸酯乳液具有明显的核壳结构；当w(Si)=30%，m(Si(Tri))/m(TRIS)=25/75，w (GMA) =2%时，乳胶膜的对水接触角为115.75°，吸水率为3.23%(12h)，整理后棉织物的淋水评分达到90分，拒水效果优异。

Abstract:

Using semi-continuous seed polymerization method, a novel acrylate latex water repellent modified with organic silicon was prepared with multi-vinyl silicone oil (Si(Tri)),3-[tris(trimethylsilyloxy)silyl]propyl methacrylate (TRIS), methyl methacrylate (MMA), butyl acrylate (BA) and acrylic acid (AA) as monomers, cationic octadecyl polyether acrylate trimethylammonium chloride (OATAC) and nonionic isomeric tridecanol polyoxyethylene ether (DNS500) compound as emulsifier, 2,2'-azobis (2-methylpropionamidine) dihydrochloride (AIBA) as initiator and glycidyl methacrylate(GMA) as cross-link agent. The influence of mass ratio of Si(Tri) and TRIS，dosage of GMA and organic silicon monomer on the performance of latex ,water contact angle, water absorption of latex film, and water repellency performance of cotton fabric finished by these latexes were investigated. The results showed that this latex particles displayed core/shell morphology obviously, when the dosage of organic silicon monomer was 30%, mass ratio of Si(Tri) and TRIS was 25/75, and dosage of GMA was 2%, the water contact angle was 115.75°，water absorption was 3.23%(12h), and the cotton fabric finished by this latex exhibited excellent water repellent property with 90 points.