MXene@聚苯胺基聚氨酯复合涂层的制备及防腐性能  

Preparation and anticorrosion property of MXene@PANI based PU composite coating

作　　者：郭静静 王奇观[1] 王飞飞 王素敏[1] GUO Jingjing;WANG Qiguan;WANG Feifei;WANG Sumin(School of Materials and Chemical Engineering,Xi’anTechnological University,Xi’an 710021,China)

机构地区：[1]西安工业大学材料与化工学院,西安710021

出　　处：《材料工程》2023年第12期143-150,共8页Journal of Materials Engineering

基　　金：国家自然科学基金项目(21772152);陕西省重点研发计划一般项目-工业领域(2021GY-220,2022GY-220,2023-YBGY-169)。

摘　　要：为提高聚苯胺(PANI)/聚氨酯(PU)涂层对腐蚀介质的物理屏障性能,引入二维片层材料是有效方法之一。以2,4-二异氰酸甲苯酯(TDI)和3,3′-二氯-4,4′-二氨基二苯基甲烷(MOCA)为原料合成聚氨酯(PU)涂层基体,将PANI与二维Ti_(3)C_(2)Tx进行插层反应制成MXene@PANI复合物,再将MXene@PANI添加到PU树脂中,得到MXene@PANI/PU防护涂层。结果表明:MXene/PANI质量比为1∶1时,经盐雾实验60天后MXene@PANI/PU涂层表面无明显腐蚀现象,腐蚀电流为3.709×10^(−9)A·cm^(−2),阻抗模值为1.93×10^(8)Ω·cm^(2)。这归因于一方面MXene改善PANI的电化学活性,提高PANI的电化学防腐蚀性能;另一方面,Ti_(3)C_(2)T_(x)纳米片可作为二维屏障,抑制腐蚀性介质进入涂层内部,提高其长效防护性能。In order to enhance the physical barrier performance of polyaniline(PANI)/polyurethane(PU)coating against corrosive medium,the introduction of two-dimensional material in the coating is one of the effective methods.PU coating matrix was synthesized from 2,4-diisocyanate(TDI)and 3,3′-dichloro-4,4′-diamino diphenylmethane(MOCA),and MXene@PANI was synthesized by intercalation reaction of PANI with Ti_(3)C_(2)T_(x).Then protective coating of MXene@PANI/PU was obtained by adding MXene@PANI into PU.The results show that when the mass ratio of MXene/PANI is 1∶1,no obvious corrosion occurs on the surface of the MXene@PANI/PU coating after 60 days of salt spraying.The corrosion current is 3.709×10^(−9)A·cm^(−2),and the impedance modulus is 1.93×10^(8)Ω·cm^(2).The reason is that MXene improves the electrochemical activity of PANI and thus enhances the electrochemical anticorrosion performance of PANI.On the other hand,MXene nanoplates as a two-dimensional barrier can prevent the corrosive medium from entering into the coating,which improves the long-term protective performance of the coating.

关 键 词：聚苯胺 Ti_(3)C_(2)T_(x) 复合物 聚氨酯 防腐性能 

分 类 号：TB332[一般工业技术—材料科学与工程]