咪唑啉季铵盐缓蚀剂改性蒙脱土/水性环氧纳米复合涂料  

Imidazoline quaternary ammonium salt corrosion inhibitor modified montmorillonite/waterborne epoxy nanocoating

作　　者：张萌 向艳丽[1] 张磊[1] 方建波[1] 任强[1] 汪称意[1] ZHANG Meng;XIANG Yanli;ZHANG Lei;FANG Jianbo;REN Qiang;WANG Chenyi(National Experimental Demonstration Center for Materials Science and Engineering,Jiangsu Key Laboratory of Environmentally Friendly Polymeric Materials,School of Materials Science and Engineering,Changzhou University,Changzhou 213164,Jiangsu,China)

机构地区：[1]常州大学材料科学与工程国家级实验教学示范中心江苏省环境友好高分子材料重点实验室材料科学与工程学院,江苏常州213164

出　　处：《精细化工》2024年第5期981-989,共9页Fine Chemicals

基　　金：国家自然科学基金项目(51873025);江苏高校品牌专业建设工程项目;江苏高校优势学科建设工程项目。

摘　　要：以油酸、二乙烯三胺和氯化苄为原料,合成了油酸基咪唑啉季铵盐缓蚀剂。通过FTIR、^(1)HNMR对其结构进行了表征,并离子交换至钠基蒙脱土(DK0)层间,制备了缓蚀剂改性蒙脱土(QACDK0)。通过XRD、TGA和UV-Vis对其结构、组成及层间缓蚀剂释放性能进行了表征。结果表明,咪唑啉季铵盐缓蚀剂约占QACDK0质量的38.96%,并将蒙脱土层间距由1.28 nm(DK0)扩大至3.98 nm(QACDK0)。利用DLS及Zeta电位对添加有QACDK0的水性环氧树脂进行了稳定性测试,其Zeta电位为–27.8 mV,具有较高的稳定性。电化学阻抗谱(EIS)测试表明,在腐蚀介质中浸泡30 d后,基于QACDK0制备的清漆漆膜仍具有2.29×10^(8)Ω·cm^(2)的高阻抗,表明涂层具有较好的耐腐蚀性。并且在耐中性盐雾测试中,QACDK0对应的防腐色漆耐盐雾时间最长,验证了该涂层具有良好的耐盐雾性能。Oleic acid imidazoline quaternary ammonium salt corrosion inhibitor,synthesized from oleic acid,diethylenetriamine and benzyl chloride,was characterized by FTIR and ^(1)HNMR and filled between Na-montmorillonite(DK0)layers through ions exchange to obtain corrosion inhibitor modified montmorillonite(QACDK0).The structure,composition and release properties of QACDK0 were then characterized and analyzed by XRD,TGA and UV-Vis.The results showed that the imidazoline quaternary ammonium salt corrosion inhibitor accounted for 38.96%of QACDK0(mass),and expanded the montmorillonite layer distance from 1.28 nm(DK0)to 3.98 nm(QACDK0).DLS and Zeta potential were further assessed to characterize the stability of aqueous epoxy emulsion with QACDK0.The Zeta potential of emulsion was–27.8 mV,showing high stability.Electrochemical impedance spectroscopy(EIS)test demonstrated that after 30 d of immersion in corrosive medium,the varnish film prepared from QACDK0 still maintained a high impedance of 2.29×10^(8)Ω·cm^(2),indicating excellent anticorrosive performance.Moreover,in the test of neutral salt spray resistance,the grey varnish film containing pigment corresponding to QACDK0 exhibited a longer salt spray resistance,

关 键 词：咪唑啉季铵盐 缓蚀剂 蒙脱土 水性环氧树脂 纳米复合防腐涂料 功能材料 

分 类 号：TQ633[化学工程—精细化工]