高附着力高柔韧性水性无机富锌涂料的制备
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摘要
采用半连续乳液聚合法,以丙烯酸酯类单体,配以环氧丙烯酸酯、乙烯基硅氧烷功能单体,合成了一种硅丙乳液,以此作为有机成膜物质添加至无机硅酸钾溶液中,与锌粉混合制备高附着力高柔韧性水性无机富锌涂料。通过红外光谱(FT-IR)、透射电镜(TEM)对合成硅丙乳液的形态结构进行表征;利用扫描电镜(SEM)对改性后的杂化涂膜及其富锌涂层的表面形貌进行分析;使用电化学阻抗谱(EIS)测试了富锌涂层的耐腐蚀性。结果表明:经自制的硅丙乳液改性后的富锌涂层附着力0级,柔韧性1 mm,耐腐蚀性明显提高。
A silicone modified acrylic emulsion has been prepared by using a semicontinuous emulsion polymerization method, with acrylate monomers and other functional monomers of epoxy acrylate and vinyl siloxane, which was added as an organic film-forming material into the inorganic potassium silicate solution, which was then mixed with zinc powder to prepare a waterborne inorganic zinc-rich coatings with excellent adhesion and flexibility.The morphology and structure of the synthesized silicone modified acrylic emulsion were characterized by infrared spectroscopy(FT-IR)and transmission electron microscopy(TEM).The surface morphology of the modified hybrid coatings film and its zinc-rich coating was analyzed by scanning electron microscopy(SEM). The corrosion resistance of zinc-rich coatings was tested using electrochemical impedance spectroscopy(EIS). The results showed that the zinc-rich coatings modified by the homemaesilicone modified acrylic emulsion provided the adhesion of rate 0 and flexibility of 1 mm, and the corrosion resistance is obviously improved.
A silicone modified acrylic emulsion has been prepared by using a semicontinuous emulsion polymerization method, with acrylate monomers and other functional monomers of epoxy acrylate and vinyl siloxane, which was added as an organic film-forming material into the inorganic potassium silicate solution, which was then mixed with zinc powder to prepare a waterborne inorganic zinc-rich coatings with excellent adhesion and flexibility.The morphology and structure of the synthesized silicone modified acrylic emulsion were characterized by infrared spectroscopy(FT-IR)and transmission electron microscopy(TEM).The surface morphology of the modified hybrid coatings film and its zinc-rich coating was analyzed by scanning electron microscopy(SEM). The corrosion resistance of zinc-rich coatings was tested using electrochemical impedance spectroscopy(EIS). The results showed that the zinc-rich coatings modified by the homemaesilicone modified acrylic emulsion provided the adhesion of rate 0 and flexibility of 1 mm, and the corrosion resistance is obviously improved.
引文
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[2]周文涛.水性无机富锌涂料的进展[J].上海涂料,2006,44(8):23-25.
[3]魏向阳.新一代水性无机富锌涂料[J].涂料工业,2007,37(5):40-43.
[4]裴蒿峰,张婷,桑玮玮,等.模数对无机富锌涂料和涂层性能的影响[J].涂料工业,2006,36(12):14-16.
[5]王石青,何德良,丁庆云,等.模数对水性硅酸钾富锌涂层电化学行为的影响[J].中国腐蚀与防护学报,2008,28(6):359-368.
[6]谢德明,冯海,马晓春,等.硅烷处理对富锌涂层行为的影响[J].腐蚀科学与防护技术,2005,17(4):237-239.
[7] ZHANG L Y,MA A B,JIANG J H,et al. Anti-corrosionperformance of waterborne Zn-rich coating with modifiedsilicon-based vehicle and lamellar Zn(Al)pigments[J].Progress in Natural Science:Materials International,2012,22(4):326-333.
[8] FAN Y Y,JIANG Y H,LI Z L. Preparation and corrosionresistance of silicate passivation film formed on galvanizedZn coatings[J].稀有金属材料与工程,2012,41(S1):211-214.
[9]张留艳,江静华,马爱斌,等.硅丙乳液在鳞片状无机富锌涂料中的应用[J].腐蚀科学与防护技术,2010,22(2):142-145.
[10]谢炎坤,刘伟区,王政芳.有机-无机杂化对无机富锌涂料性能的影响[J].精细化工,2018,35(04):710-715.