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水和氯离子在纳米蒙脱土改性光固化涂层中的传输行为
引用本文:郑耀臣,陈芳.水和氯离子在纳米蒙脱土改性光固化涂层中的传输行为[J].腐蚀与防护,2008,29(4):189-191.
作者姓名:郑耀臣  陈芳
作者单位:1. 烟台大学化工系,烟台,264005
2. 威海鲁江实业有限公司,威海,264200
摘    要:采用静态浸泡法绘制了漆膜增重-时间曲线,考察了纳米蒙脱土(nano-MMT)改性紫外光固化涂层的吸水性,分析了纳米蒙脱土用量、环氧丙烯酸酯(EA)与合成活性稀释剂(AD)比例、光固化涂层的固化程度与介质传输行为的关系。结果表明:在浸泡初期,NaCl溶液在涂层中的传输行为符合Fick扩散定律,之后涂层吸水量达到饱和,由计算公式可求得渗透介质在涂层中的扩散系数。同时,涂层的固化程度越高、WEA:WAD越大,涂层的抗介质渗透性能越好。

关 键 词:紫外光固化涂料  纳米蒙脱土  介质传输  Cl-
文章编号:1005-748X(2008)04-0189-03
修稿时间:2007年3月26日

Diffusion Behaviors of Water and Chloride Ion through UV-cured Coatings Modified by Nano-montmorillonite
ZHENG Yao-chen,CHEN Fang.Diffusion Behaviors of Water and Chloride Ion through UV-cured Coatings Modified by Nano-montmorillonite[J].Corrosion & Protection,2008,29(4):189-191.
Authors:ZHENG Yao-chen  CHEN Fang
Abstract:Diffusion behaviors of UV-cured coatings modified by nano-montmorillonite(nano-MMT) were investigated by using static immersion method.The effects of addition amount of nano-MMT,the weight ratio of epoxy acrylate(EA) to reactive diluents(AD) and the curing degree of the UV-cured coating on the behavior of medium permeation were analyzed.The results showed that the diffusion behavior of permeation medium conformed to Fick diffusion law in early stage,and then the water percolating capacity was constant.The diffusion coefficient of permeation medium through UV-cured coatings could be obtained by correlative formula.The medium permeation behavior in the coatings was mainly determined by the curing degree and ratio of WEA to WAD.The resistance of the coatings to medium permeation increased with increase of curing degree and ratio of WEA to WAD.
Keywords:UV-curable coating  nano-montmorillonite  medium permeation  Cl
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