纳米ZrO_(2)的改性及其对硅烷防腐涂层的影响  

Modification of Nano-ZrO_(2)and Its Effect on Silane Anti-Corrosion Coating

作　　者：杨超[1,2] 赵晨阳 张继 杨辉 Yang Chao;Zhao Chenyang;Zhang Ji;Yang Hui(School of Materials Science and Engineering of Zhejiang University,Hangzhou Zhejiang 310058,China;Zhejiang California International NanoSystems Institute,Zhejiang University,Hangzhou Zhejiang 310058,China)

机构地区：[1]浙江大学材料科学与工程学院,浙江杭州310058 [2]浙江大学浙江加州国际纳米技术研究院,浙江杭州310058

出　　处：《上海涂料》2024年第2期1-6,共6页Shanghai Coatings

基　　金：中央高校基本科研业务费专项资金资助(226-2023-00081)。

摘　　要：硅烷材料作为一种绿色环保材料受到了广泛的关注。然而采用溶胶-凝胶法制备的硅烷涂层存在涂层厚度薄、脆性大、交联密度低等缺点,难以为金属材料提供有效的防腐保护,严重限制了硅烷涂层在防腐领域的应用。本研究采用3-(甲基丙烯酰氧)丙基三甲氧基硅烷(KH570)对平均晶粒尺寸约为20 nm的纳米氧化锆(ZrO_(2))进行了改性,探究了改性对ZrO_(2)粉体晶粒尺寸以及晶型的影响。此外,研究了改性ZrO_(2)添加量对硅烷涂层微观形貌以及防腐性能的影响。根据动电位极化曲线的结果,改性ZrO_(2)的加入可以显著提高硅烷涂层的防腐性能。采用X射线衍射、动态光散射、透射电镜、热重分析和扫描电镜对改性后的ZrO_(2)进行了表征。当改性ZrO_(2)的添加量为10%时,ZrO_(2)/硅烷复合涂层的腐蚀电位从未添加改性ZrO_(2)时的-0.591 V显著提升至-0.149 V。As a kind of green environmental protection material,silane-based material has been widely concerned.Despite their merits,silane coatings developed through the sol-gel method are plagued by several limitations,including thin coating thickness,poor mechanical strength,and inadequate toughness,etc.These deficiencies impede their effectiveness in delivering robust anti-corrosion protection for metal substrates,thereby constraining their broader application in corrosion prevention.In order to overcome these challenges,this study embarked on a modification process which involved nano-zirconia(ZrO_(2))with an average particle size of approximately 20 nm using 3-methacryloxypropyltrimethoxysilane(KH570).This modification process was scrutinized for its influence on the granular dimensions and crystalline structure of the ZrO_(2)powder.Additionally,the study delved into the effects of varying concentrations of this modified ZrO_(2)on the micro-morphology and anti-corrosion characteristics of the silane coatings.Empirical evidence,derived from potentiodynamic polarization curves,revealed that addition of modified ZrO_(2)markedly amplifies the anti-corrosion efficacy of the silane coatings.Characterization of the modified ZrO_(2)was meticulously conducted by advanced analytical techniques,including X-ray diffraction,dynamic light scattering,transmission electron microscopy,thermo gravimetric analysis,and scanning electron microscopy.A key finding was that at a 10%incorporation rate of modified ZrO_(2),the corrosion potential of the ZrO_(2)/silane composite coating witnessed a substantial enhancement,escalating from-0.591 V(in the absence of modified ZrO_(2))t o-0.149 V,thereby underscoring a significant improvement in corrosion res istance.

关 键 词：ZrO_(2) 硅烷 改性 防腐 涂层 

分 类 号：TQ630.7[化学工程—精细化工]