纳米SiO_2/改性丙烯酸树脂低表面能防污涂料  

Antifouling Coating with Low Surface Energy Based on Silicone Modified Acrylic Resin and Nano SiO_2

作　　者：史洪微[1] 刘福春[1] 韩恩厚[1] 郝庆辉 邱再明 

机构地区：[1]中国科学院金属研究所国家金属腐蚀控制工程技术研究中心,辽宁沈阳110016 [2]大连裕祥科技集团有限公司,辽宁大连116033

出　　处：《中国材料进展》2014年第2期95-100,113,共7页Materials China

基　　金：国家自然科学基金项目(51001109);国家科技支撑计划项目(2009BAE70B01)

摘　　要：低表面能防污涂料是船舶涂料的一个重要分支。利用有机硅改性的丙烯酸树脂作为成膜物质,纳米SiO2为填料,制备了低表面能纳米复合防污涂料。考察了有机硅单体对改性丙烯酸树脂性能的影响,发现随着有机硅含量的增加,改性后的树脂粘度减小,水接触角增加。研究了氟硅烷改性纳米SiO2含量对涂层形貌和水接触角的影响。结果表明,添加少量的氟硅烷处理的纳米SiO2(1%和3%)可显著增大涂层的水接触角,提高涂层的防污性能。添加纳米SiO2浆的涂层的水接触角要高于添加接枝氟硅烷纳米SiO2的涂层,而后者要高于添加未接枝氟硅烷纳米SiO2的涂层。当纳米SiO2的添加量在1%和3%时,涂层的水接触角分别达到101.8°和103°。采用纳米浓缩浆工艺分散后的纳米SiO2可以使涂层的表面形成微米-纳米的特征形貌,从而实现防污的目的。Antifouling coating with low surface energy is an important branch of marine coatings. In the present work, an organosilicone modified acrylic resin was used as coating matrix and nano SiO2 was used as filler to prepare an antifouling coating with low surface energy. The effect of silicone monomer content on the properties of the modified acrylic resin was investigated. It was found that with the increase of silicone monomer content, the viscosity of the modified acrylic resin de- creases, while the water contact angle of the modified acrylic resin increases. The effect of nano SiO2 content on the coat- ing morphology and water contact angle was studied. The results show that the addition of small amount of nano SiO2 （ 1% and 3 % ） that was treated by fluorosilane can significantly increase water contact angle and improve the anti-fouling proper- ty of the coatings. The water contact angle of polyurethane coating with addition of nano SiO2 paste is higher than that of polyurethane coating with addition of fluorosilane modified SiO2 , while the later is higher than that of polyurethane coating with addition of unmodified SiO2. When the contents of nano SiO2 are 1% and 3% , the water contact angles of the coat- ings reach 101.8°and 103° , respectively. The dispersed nano SiO2 in concentrated paste contributes to the micro-nano structure of coating surface, which benefits the anti-fouling property.

关 键 词：纳米SiO2 防污涂料 氟硅烷 低表面能 

分 类 号：TQ637.2[化学工程—精细化工]