摘要
以纳米SiO_(2)为微纳结构改性剂、含氢硅油(HQGY)共混改性聚氨酯(PU)为树脂基体、片状黄铜粉为功能颜料,采用玻璃棒刮涂法制备得到了一种具有超疏水特性的低红外发射率涂层。系统研究了HQGY和PU质量比、总填料(黄铜粉+纳米SiO_(2))添加量、黄铜粉和纳米SiO_(2)质量比对涂层性能的影响规律。结果表明:HQGY和PU质量比可明显影响涂层的表面能和活性基团含量,从而影响涂层综合性能。总填料添加量的增加可明显增加涂层表面的乳突状微纳粗糙结构,从而使涂层发射率升高、光泽度降低、水接触角增大。黄铜粉和纳米SiO_(2)质量比的降低,可使涂层中片状黄铜粉的绝对含量降低,纳米SiO_(2)的绝对含量升高,进而使涂层发射率升高、光泽度降低、水接触角增大。当HQGY和PU的质量比为1∶9、总填料添加量为50%、黄铜粉和纳米SiO_(2)的质量比为6.5∶3.5时,涂层同时具备最优的发射率(0.738)、光泽度(1.8)、附着力(1级)和超疏水(水接触角152°,滚动角8°)性能。
A low infrared emissivity coating with super-hydrophobic properties was prepared by glass rod coating method using nano-SiO_(2) as the micro-nano structural modifier,hydrogen-containing silicone oil(HQGY)blending modified polyurethane(PU)as the resin matrix,and flake brass powder as the functional pigment,respectively.The influence of the mass ratio of HQGY to PU,the total filler(brass powder+nano SiO_(2))addition,and the mass ratio of brass powder to nano SiO_(2) on the coating properties was systematically studied.The results showed that the mass ratio of HQGY to PU could significantly affect the surface energy and active group content of the coating,thereby affecting the overall performance of the coating.The increase of the total filler addition could obviously increase the papillary micro-nano rough structure of the coating surface,thereby increasing the emissivity of the coating,reducing the glossiness,and increasing the water contact angle.The reduction of the mass ratio of brass powder to nano-SiO_(2) could reduce the absolute content of flake brass powder and increase the absolute content of nano-SiO_(2) in the coating,which in turn increased the emissivity of the coating,reduced the glossiness,and increased the water contact angle.When the mass ratio of HQGY to PU was 1∶9,the total filler content was 50%,and the mass ratio of brass powder to nano-SiO_(2) was 6.5∶3.5,the coating had the best emissivity(0.738),glossiness(1.8),adhesion strength(level 1),and super-hydrophobic performance(water contact angle 152°,rolling angle 8°)at the same time.
作者
吕丹丹
赵曼婷
张伟钢
Lyu Dandan;Zhao Manting;Zhang Weigang(School of Materials and Chemical Engineering,Chuzhou University,Chuzhou 239000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第7期100-105,共6页
New Chemical Materials
基金
国家自然科学基金(61705029)
安徽省高校优秀青年人才支持计划重点项目(gxyqZD2020044)
安徽省自然科学基金项目(1808085MF187)
安徽省科技重大专项(202103a05020018)。
关键词
复合涂层
红外发射率
超疏水
附着力
composite coating
infrared emissivity
super-hydrophobic
adhesion strength
