%0 Journal Article
%T Effects of Dopamine-modifed UHMWPE Powders on the Toughness and Tribological Properties of Epoxy Coating<br>多巴胺改性UHMWPE粉末对环氧涂层韧性及摩擦性能的影响
%A HU Wei-wei
%A ZHAO Wen-jie
%A CAO Hui-jun
%A ZENG Zhi-xiang
%A ZHANG Xin
%A WU Xue-dong
%A <br>胡伟炜
%A 赵文杰
%A 曹慧军
%A 曾志翔
%A 张昕
%A 乌学东
%J 摩擦学学报
%D 2012
%I 
%X Dopamine is used to modify the inert surface of ultra high molecular weight polyethylene (UHMWPE) powders for its oxidative self-polymerical property. The compatibility between powders and epoxy resin is enhanced and then epoxy coatings with excellent anti-wear and tough properties are prepared. Scanning electron microscope, X-ray photoelectron spectroscopy and infrared spectroscopy are utilized to characterize the surface morphology and the chemical states of the dopamine-modified powders. Tribological tester is utilized to evaluate the friction coefficient and wear rate of the epoxy coatings. Results show that a polydopamine layer which is full of polar groups adhered on the surface of dopamine-modified powders. This layer reacts with the epoxy resin and this enhances the compatibility. The ratios of O to C and N to C on the surface of dopamine-modified powders first increase with the modification time and then reach a maximum at a modification time of 5 h. The impact-resistance performance of epoxy coating is enhanced by increasing the dopamine-modified powder content from 6.7% to 20%. In addition, friction coefficient and wear rate are also decreased. The comprehensive performance of epoxy coating with dopamine-modified powders is better than the one with unmodified powders.
%K UHMWPE
%K dopamine
%K surface modification
%K epoxy resin
%K tribological properties
%K toughness<br>UHMWPE
%K 多巴胺
%K 表面改性
%K 环氧树脂
%K 摩擦磨损性能
%K 韧性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=5D344E2AD54D14F8&jid=2F467A5C6371C830162AAA01D7DAD07A&aid=07D5C02CEFE37BFE781B57FA5D0AE4B3&yid=99E9153A83D4CB11&vid=9971A5E270697F23&iid=94C357A881DFC066&sid=8D75AD3BD0D1BCC5&eid=5824536C90612D67&journal_id=1004-0595&journal_name=摩擦学学报&referenced_num=0&reference_num=23