郑禹,胡萍,李珂,李建平,黄樟华.轨腰仿生自分层防腐梯度涂料合成及影响因素和结构探究[J].表面技术,2020,49(1):245-253.
ZHENG Yu,HU Ping,LI Ke,LI Jian-ping,HUANG Zhang-hua.Synthesis, Influencing Factors and Structure of Bionic Self-layering Anti-corrosion Gradient Coating for Rail Waist.Surface Technology,2020,49(1):245-253.
轨腰仿生自分层防腐梯度涂料合成及影响因素和结构探究
Synthesis, Influencing Factors and Structure of Bionic Self-layering Anti-corrosion Gradient Coating for Rail Waist
投稿时间:2019-07-03  修订日期:2020-01-20
DOI:10.16490/j.cnki.issn.1001-3660.2020.01.029
中文关键词:  涂料  环氧树脂  丙烯酸树脂  轨腰  自分层  仿生荷藕结构  防腐蚀  涂膜结构
英文关键词:coating  epoxy resin  acrylic resin  rail waist  self-layering  bionic lotus structure  anti-corrosion  coating structure
基金项目:国家自然科学基金项目(51075311);铁路轮轨摩擦控制产品研发(611609921)
作者单位
郑禹 1.武汉理工大学 化学化工与生命科学学院,武汉 430070 
胡萍 1.武汉理工大学 化学化工与生命科学学院,武汉 430070;2.浙江宝晟铁路新材料科技有限公司,浙江 嵊州 312400 
李珂 1.武汉理工大学 化学化工与生命科学学院,武汉 430070 
李建平 3.中国铁路集团公司上海局杭州工务段,杭州 310000 
黄樟华 2.浙江宝晟铁路新材料科技有限公司,浙江 嵊州 312400 
AuthorInstitution
ZHENG Yu 1.School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China 
HU Ping 1.School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China; 2.Zhejiang Baosheng Railway New Materials Technology Co., Ltd, Shengzhou 312400, China 
LI Ke 1.School of Chemistry, Chemical Engineering and Life Sciences, Wuhan University of Technology, Wuhan 430070, China 
LI Jian-ping 3.Hangzhou Works Section of Shanghai Bureau of China Railway Group Corporation, Hangzhou 310000, China 
HUANG Zhang-hua 2.Zhejiang Baosheng Railway New Materials Technology Co., Ltd, Shengzhou 312400, China 
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中文摘要:
      目的 仿荷藕结构及功能,制备一种自分层防腐涂料。方法 合成聚氨酯改性环氧树脂(PU/EP)及氟硅改性丙烯酸树脂(氟硅改性PAA),将两种树脂共混形成自分层涂料。通过铅笔硬度测试、机械性能测试、接触角测试、耐老化测试、划格法附着力测试、电化学阻抗测试等,分别评价两种树脂比例、混合溶剂比例对涂膜自分层行为及性能的影响,并通过SEM-EDS、红外光谱等表征技术分析涂膜分层后的结构。结果 当PU/EP∶氟硅改性PAA=1∶1时,接触角达到96.0°,柔韧性为0.5 mm,耐冲击为50 cm,附着力等级为1,失光率降至19%;乙酸丁酯(NBAC)∶正丁醇(NBA)=4∶6时,涂膜分层情况良好,接触角达到107.7°,浸泡水中48 h耐水性无变化,失光率降至17%。SEM-EDS、红外光谱分析表明,自分层涂膜上层为氟硅改性PAA、底层为PU/EP,中间存在过渡涂层,过渡层两种树脂中的─COOH、─OH、环氧基发生反应,使整个涂层更具稳定性。经由EIS分析,在3.5%NaCl溶液中浸泡40天后,腐蚀介质没有渗透涂膜到达基底金属界面。结论 制备的轨腰仿生自分层涂膜的机械性能、附着力、疏水性、耐老化、防腐蚀性能优异,涂膜结构稳定。
英文摘要:
      The work aims to prepare a self-layering anticorrosive coating based on the structure and function of the lotus. Self-layering coatings were prepared by mixing polyurethane modified epoxy resin (PU/EP) and fluorosilicone modified acrylic resin (fluorosilicon modified PAA). The effects of the ratio of two resins, and the mixed solvent ratio on self-layering behavior and performance were evaluated by pencil hardness test, mechanical property test, contact angle test, aging resistance test, cross-hatch adhesion test, and EIS test, etc. The structure of the coating layer was analyzed by SEM-EDS, FTIR and other characterization techniques. When PU/EP∶fluorosilicone modified PAA was 1∶1, the contact angle reached 96.0°, the flexibility was 0.5 mm, the impact resistance was 50 cm, the adhesion level was 1, and the loss rate was reduced to 19%; When NBAC∶NBA was 4∶6, the coating film stratification was good, the contact angle reached 107.7°, water resistance had no change after immersion in water for 48 h, and the loss rate was reduced to 17%. By SEM-EDS and FTIR, the upper layer of the coating film was fluorosilicone modified PAA, the bottom layer was PU/EP, and there was a transition coating in the middle. In the transition layer, ─COOH, ─OH and epoxy groups in two reins reacted make the entire coating more stable. After immersion in 3.5% NaCl solution for 40 days, the electrolyte solution did not penetrate into the interface between the coating and the base metal by the EIS test. Therefore, the prepared rail waist bionic self-layering coating has excellent mechanical properties, adhesion, hydrophobicity, aging resistance and anti-corrosion, and the coating film structure is stable.
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