氟硅树脂改性紫外光固化易清洁涂层的制备及性能研究  

Preparation and Performance of UV Light Cured Fluorosilicone Modified Easy-cleaning Coating

作　　者：李志刚 吕朝龙 胡增 刘晓亚 李小杰 LI Zhi-gang;LYU Zhao-long;HU Zeng;LIU Xiao-ya;LI Xiao-jie(School of Chemical and Material Engineering,Jiangnan University,Jiangsu Wuxi 214122,China)

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122

出　　处：《表面技术》2023年第7期250-260,324,共12页Surface Technology

摘　　要：目的以聚氨酯丙烯酸酯为基体树脂、氟硅树脂为添加剂,制备一种具有疏水、防涂鸦和耐磨性能的紫外光固化易清洁光滑涂层。方法首先采用氨基甲酸酯化反应合成一种含硅氧烷结构的三官能度丙烯酸酯单体(TATES)。然后以1H,1H,2H,2H-全氟辛基三甲氧基硅烷(POTS)、丙基三甲氧基硅烷(MPMS)、TATES为原料,通过水解-缩聚法制备了一系列氟硅树脂(AFSR)。最后将AFSR添加到聚氨酯丙烯酸酯树脂中,经紫外光固化得到氟硅树脂改性的聚氨酯易清洁涂层。系统地研究了AFSR添加量对涂层润湿性、自清洁、防涂鸦及耐磨性的影响。结果氟含量为92.6%(物质的量分数)的AFSR在PUA中的添加量为2.5%时,涂层表面的水和十六烷的接触角分别为112.6°和66.3°,且拥有很低的水和十六烷滑动角。随着涂层中AFSR添加量从0.5%增加到2.5%,防污性能逐渐提高,具有明显的油性记号笔收缩和自清洁效果,并且易清洁涂层经过3000次的摩擦循环后,仍具有良好的收缩效果和持久的防污性能,表明涂层具有优异的耐磨性能。结论随着AFSR添加量的增加,涂层中氟硅含量增加,表面能降低,使得涂层拥有高的接触角与低的滑动角。AFSR添加量为2.5%时,涂层具有最佳的防污性能。三官能度的TATES的引入与硅树脂三维网络的构建,提高了涂层的硬度,使得涂层具有优异的耐久性防污性能。Ultraviolet(UV)light curing technology uses UV light to accomplish the rapid polymerization and crosslinking of active ingredients.UV light cured coatings offer many advantages over conventional coatings,such as rapid ambient curing,minimum equipment space requirements,no need for thermal drying,minimal energy consumption,and volatile organic compounds(VOCs)free.Easy-cleaning coating is a low-energy surface coating prepared by intro ducing fluorine or silicon-containing resins into polymer matrices,such as polyurethane,epoxy,acrylate and other resins.However,most silicone resins have poor solvent resistance and mechanical stability,and the modification of silicone resins with fluorinated compounds is a valuable method.Furthermore,there are few reports on UV light cured easy-cleaning coatings.Herein,the work aims to propose an easy-cleaning coating by combining UV light curing technology and fluorine-containing silicone resin.The UV light cured fluorosilicone modified easy-cleaning coating with hydrop-hobic,anti-smudge and wear-resistant properties can be prepared by incorporating fluorine-containing silicone acrylate resin into the polyurethane acrylate resin.A trifunctional acrylate monomer containing siloxane group(TATES)was firstly synthesized from pentaerythritol triacrylate(PETA)and 3-isocyanatopropyltrimethoxysilane(IPTES),and fluorine-containing silicone acrylate resin(AFSR)was then prepared by a hydrolysis polycondensation of TATES,1H,1H,2H,2H-perfluorooctyltrimethoxysilane(POTS),trimethoxy(propyl)silane(MPMS)and hexamethyldisiloxane(MM).Finally,the prepared AFSR was added to polyurethane acrylate resin and cured by UV light to afford fluorosilicone modified easy-cleaning coating.The chemical structures of TATES and AFSR were characterized by Fourier transform infrared(FT-IR)spectroscopy and nuclear magnetic resonance(NMR)spectroscopy.The molecular weight,viscosity and transmittance of AFSR with different fluorine contents were analyzed by gel permeation chromatography(GPC),rotational rheometer(RR)and ult

关 键 词：紫外光固化 氟硅树脂 聚氨酯丙烯酸酯 光滑涂层 易清洁涂层 防涂鸦 

分 类 号：TB34[一般工业技术—材料科学与工程]