紫外光固化漆酚铈聚合物涂层的制备与性能研究  

Preparation and Properties of UV-curable Urushiol-cerium Polymer Coatings

作　　者：赵婉 操倩文 武海棠[1,2] 黄晓华 ZHAO Wan;CAO Qianwen;WU Haitang;HUANG Xiaohua(College of Forestry, Northwest A&F University, Yangling 712100, China;Key Laboratory of Exploitation and Utilization of Economic Plant Resources in Shaanxi Province, Yangling 712100, China)

机构地区：[1]西北农林科技大学林学院,陕西杨凌712100 [2]陕西省经济植物资源开发利用重点实验室,陕西杨凌712100

出　　处：《林产化学与工业》2019年第4期113-119,共7页Chemistry and Industry of Forest Products

基　　金：国家重点研发计划资助项目(2017YFD0600705);陕西省自然科学基础研究计划项目(2019JM-449);杨凌示范区科技计划项目(2018GY-06)

摘　　要：以稀土化合物氯化铈和漆酚为原料,在无引发剂的条件下利用紫外光(UV)辐照法制备漆酚铈聚合物涂层。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、扫描电镜(SEM)、热重分析(TG)等测试方法对涂层的结构和热稳定性进行了表征。考察了氯化铈用量对涂层的物理机械性能和耐化学介质性能的影响,并对制备的漆酚铈涂层进行电化学阻抗测试(EIS),结果表明:在UV辐照条件下,漆酚羟基与铈离子发生配位作用,同时侧链不饱和键发生交联聚合反应从而固化;掺杂氯化铈可显著改善天然生漆(RL)固化膜的热稳定性和耐碱性;随着氯化铈掺杂量的增加,涂层的附着力、硬度、耐腐蚀性能呈先上升后下降的趋势。氯化铈用量为18%的漆酚铈聚合物复合涂层的硬度和附着力分别达到6H和1级,且其耐腐蚀性能最佳。Urushiol-cerium polymer (UCeP) coatings were prepared via UV-curing process without initiator using CeCl 3 and urushiol as raw materials. The structure and thermal stability of the coatings were characterized by X-ray diffraction(XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and thermal gravimetric analysis (TG). The effects of CeCl 3 amount on the physical-mechanical properties and chemical medium resistance of the polymer coatings were investigated. The electrochemical impedance spectroscopy (EIS) tests were also carried out on the prepared urushiol-cerium coatings. The results showed that under the irradiation of UV urushiol hydroxyl coordinated with cerium ions, meanwhile, the unsaturated bonds in the side chain of urushiol underwent cross-linking polymerization, resulting in the curing of the coatings. Doping CeCl 3 could significantly improve the thermal stability and alkali resistance of raw lacquer(RL) film. With the increase of CeCl 3 amount, the adhesion, hardness and corrosion resistance of the coatings first increased and then decreased. The hardness and adhesion of urushiol-cerium polymer coating with the CeCl 3 amount of 18% reached 6H and 1 grade, respectively, and its corrosion resistance was the best.

关 键 词：漆酚 氯化铈 紫外光固化 耐腐蚀性 

分 类 号：TQ35[化学工程]