摘要
丙烯酸树脂基涂层具有良好的耐候性,但其力学性能较差,耐刮擦及摩擦磨损性能不足等缺点易导致其使用寿命降低。为改善其耐刮擦及摩擦磨损性能,进一步提高其耐候性和延长使用寿命,采用溶胶凝胶法合成了八乙烯基多面体低聚倍半硅氧烷(OvPOSS),进一步将其与丙烯酸树脂(PMB)原位复合改性制备了不同OvPOSS添加量的有机无机杂化树脂。利用光镜、接触角测量仪、显微硬度仪等表征了OvPOSS改性树脂制备的涂层在紫外辐照前后的表面形貌、接触角、硬度等;采用纳米划痕仪和摩擦试验机研究了涂层改性前后的耐刮擦和摩擦磨损性能。结果表明:当添加OvPOSS质量分数为10%时,改性涂层的各方面性能最佳。与未改性的丙烯酸涂层相比,OvPOSS的加入显著改善了OvPOSS/PMB复合涂层的硬度,抗紫外线性,耐刮擦和摩擦磨损等性能。
Acrylic resins based coatings have good weather resistance,but its low mechanical properties,scratch and wear resistance limits its service life.In order to further improve the weatherability of acrylic coatings,enhance their mechanical properties,scratch resistance and service life,octa-vinyl polyhedral oligomeric silsesquioxane(OvPOSS)was synthesized and added into arcylic resin(PMB).The organic-inorganic hybrid resins(OvPOSS/PMB)with different OvPOSS contents were prepared,and the effect of ultraviolet(UV)irradiation on the properties was investigated.The light microscope,contact angle measuring instrument and hardness tester were used to characterize the surface shape,contact angle and micro-hardness of POSS modified coating before and after UV irradiation.The nanoscratch and friction tester were used to study the scratch resistance and tribological properties before and after modification.Results show that when the contents of POSS is 10%,the coating has the optimal comprehensive performance.The addition of OvPOSS significantly improved the hardness,UV resistance,scratch and wear resistance of OvPOSS/PMB composite coatings compared to unmodified acrylic coatings.
作者
俞传永
鞠鹏飞
陈磊
李红轩
周惠娣
陈建敏
YU Chuanyong;JU Pengfei;CHEN Lei;LI Hongxuan;ZHOU Huidi;CHEN Jianmin(State Key Laboratory of Solid Lubrication,Lanzhou Institute of Chemical Physics,Chinese Academy of Sciences,Lanzhou 730000,China;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,China;Shanghai Aerospace Equipment Manufacture,Shanghai 200245,China)
出处
《中国表面工程》
EI
CAS
CSCD
北大核心
2019年第4期74-83,共10页
China Surface Engineering
基金
国家自然科学基金(U1637204)。
关键词
低聚倍半硅氧烷
丙烯酸树脂
耐紫外性能
耐刮擦性
摩擦学性能
polyhedral oligomeric silsesquioxane(POSS)
arcylic resin
ultraviolet resistance
scratch resistance
tribological property
