生物基聚氨酯抗涂鸦自清洁涂料的制备及性能  

Preparation and performance of biobased polyurethane anti⁃graffiti and self⁃cleaning coating

作　　者：韦代东 李惠枝 曾娟娟 赵传国[3] 李士强[1,2] WEI Daidong;LI Huizhi;ZENG Juanjuan;ZHAO Chuanguo;LI Shiqiang(Guangzhou Chemical Grouting Engineering Co,Ltd,CAS,Guangzhou 510650,China;Guangdong Research and Development Center of Chemical Grouting Engineering Technology,Guangzhou 510650,China;Qingdao Municipal Center for Disease Control&Prevention,Qingdao 266033,China)

机构地区：[1]中科院广州化灌工程有限公司,广州510650 [2]广东省化学灌浆工程技术研究开发中心,广州510650 [3]青岛市疾病预防控制中心,青岛266033

出　　处：《中国塑料》2023年第2期15-21,共7页China Plastics

摘　　要：以环氧大豆油和2,2⁃双(羟甲基)丙酸为原料,在无溶剂条件下通过开环法合成了1种高羟值生物基多元醇(ESOD)。以ESOD为羟基组分,六亚甲基二异氰酸酯三聚体为固化剂,单羟基封端聚二甲基硅氧烷(PDMS⁃OH)为低表面能润滑剂,制备了1种透明光滑的生物基聚氨酯抗涂鸦自清洁涂料。结果表明,只需添加1%(质量分数,下同)PDMS⁃OH,涂层即具有良好的抗涂鸦和自清洁性能。水、咖啡、白米醋、正十六烷、花生油液滴可在倾斜的涂层表面滑落而不留下痕迹。石墨粉、黏土粉和橙色颜料粉在倾斜的涂层表面能够被水滴轻松带走。油性记号笔在涂层表面划过时,墨水自动收缩成细小的液滴,且可用纸巾轻松擦除而不在涂层表面留下任何痕迹。涂层具有良好的耐磨性,记号笔在涂层表面涂写和擦除1200次循环后,涂层仍具有优异的墨水收缩能力。In this work,a vegetable oil⁃based(ESOD)polyol with a high hydroxyl value was obtained through a ring⁃opening reaction between epoxidized soybean oil and 2,2⁃bis(hydroxymethyl)propionic acid using a solvent⁃free method.To fabricate an anti⁃graffiti and self⁃cleaning coating,the ESOD polyol,mono⁃hydroxy⁃terminated polydimethylsiloxane(PDMS⁃OH),and hexamethylene diisocyanate trimer were employed as a polyol component,a low surface energy com⁃ponent,and a curing agent,respectively.The as⁃prepared biobased coatings look very smooth and transparent.With in⁃corporating only 1%of PDMS⁃OH,the resulting coatings exhibited outstanding anti⁃graffiti and self⁃cleaning perfor⁃mance.The droplets of water,coffee,rice vinegar,hexadecane,or peanut oil could slide off from the surface of the coa⁃tings without leaving any wetting footprints.Graphite powders,clay powders,and orange pigment powders could be effi⁃ciently removed by dripping water.Impressively,the coatings presented good wear resistance.Even after subjected to 1,200 cycles of writing and erasing with an oil⁃based marker pen,the coatings still exhibited a good ink shrinkage ability due to easy easing of ink traces.

关 键 词：聚氨酯涂料 抗涂鸦 自清洁 生物基多元醇 环氧大豆油 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]