纳米钼酸银改性水性聚氨酯防腐性能的研究  

STUDY ON ANTI-CORROSION PROPERTIES OF WATERBORNE POLYURETHANE MODIFIED WITH SILVER MOLYBDATE NANOPARTICLES

作　　者：方涛 吴邦世[2,3] 尹红 张曼 刘杰胜 谭晓明 FANG Tao;WU Bang-shi;YIN Hong;ZHANG Man;LIU Jie-sheng;TAN Xiao-ming(School of Civil Engineering and Architecture,Wuhan Polytechnic University,Wuhan 430023,China;School of Chemical and Environmental Engineering,Wuhan Polytechnic University,Wuhan 430023,China;Pilot-scale Platform of Marine Engineering Structural Protective Materials,Wuhan Polytechnic University,Wuhan 430023,China)

机构地区：[1]武汉轻工大学土木工程与建筑学院,湖北武汉430023 [2]武汉轻工大学化学与环境工程学院,湖北武汉430023 [3]武汉轻工大学海洋工程结构防护材料中试平台,湖北武汉430023

出　　处：《南阳理工学院学报》2025年第2期105-111,共7页Journal of Nanyang Institute of Technology

基　　金：湖北省自然科学基金项目(2021CFB583);湖北省教育厅科研项目(B2022235);武汉轻工大学科研项目(2023Y48和2022RZ021)。

摘　　要：近年来采用纳米粒子改性水性聚氨酯已成为研究的热点之一,但纳米粒子容易团聚,导致对水性聚氨酯防腐性能的改性效果大幅降低。为解决这一问题,采用沉淀法制备了纳米钼酸银,结合表面活性剂使其分散在水中制备得到纳米钼酸银分散液,利用纳米激光粒度仪测试粒径分布和Zeta电位,进而进行分析和筛选。将选出的纳米钼酸银分散液与水性聚氨酯均匀混合后,涂覆于马口铁板上进行耐液体介质、盐雾和电化学阻抗实验。结果表明,与纯水性聚氨酯相比,纳米钼酸银改性水性聚氨酯具有更好的耐水和耐酸碱性能,耐盐雾腐蚀时间从2 d增加到8 d,电化学阻抗模值从1.82×105Ω提高至1.11×106Ω。The modification of waterborne polyurethane with nanoparticles has become one of the hotspots in research,but the nanoparticles are easy to be agglomerated,which leads to a significant reduction in the modification effect on the anticorrosive properties of waterborne polyurethane.In this paper,silver molybdate nanoparticles were prepared by precipitation method,and silver molybdate nanoparticles dispersions were prepared by combining surfactants and dispersing them in water.The particle size distribution and Zeta potential were tested by nano laser particle sizer,and then analyzed and screened.The selected silver molybdate nanodispersions were homogeneously mixed with aqueous polyurethane and coated on tinplate for liquid medium resistance,salt spray and electrochemical impedance tests.The results showed that the nano-silver molybdate-modified waterborne polyurethane had better water and acid/alkali resistance compared with the pure waterborne polyurethane,the salt spray corrosion resistance time was increased from 2 to 8 d,and the electrochemical impedance modulus value was increased from 1.82×105Ωto 1.11×106Ω.

关 键 词：纳米钼酸银 分散 改性水性聚氨酯 防腐蚀性能 

分 类 号：Q938.8[生物学—微生物学]