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摘要
以蒙脱土(MMT)为载体,通过原位聚合和阳离子吸附法制备聚苯胺/蒙脱土(PANI/MMT)和银离子负载聚苯胺/蒙脱土(Ag+-PANI/MMT)材料;以Ag+-PANI/MMT为功能填料,环氧树脂为基体,制备复合涂层。采用X射线衍射仪、傅里叶变换红外光谱仪、热重分析仪、扫描电子显微镜等表征手段对材料和涂层进行了表征。结果表明:苯胺插入膨润土层间并完成了原位聚合反应;功能填料Ag+-PANI/MMT含量在20%～30%(wt,质量分数,下同)时复合涂层的电阻变化率减慢;复合涂层的热分解温度随着功能填料的添加有升高的趋势,且涂层受热过程中更稳定;Ag＋-PANI/MMT含量为20%时,复合涂层抑菌率达95.8%,复合涂层的防腐效果最好;腐蚀前,复合涂层表面较平整光滑且相对致密,无大面积堆积现象,腐蚀后功能填料周围并未发生大面积的点腐蚀,仍保持良好的完整性,涂层无裂纹。
Abstract
Polyaniline/montmorillonite (PANI/MMT) and silver ion-loaded polyaniline/montmorillonite (Ag+-PANI/MMT) materials were prepared by in-situ polymerization and cationic adsorption using montmorillonite as carrier.Used Ag+-PANI/MMT as the functional filler and epoxy resin as the matrix,a composite coating was prepared.The materials and coatings were characterized by XRD,FT-IR,TG and SEM.The results showed that aniline was inserted into the bentonite layer and the in-situ polymerization was completed.The resistance change rate of the coating slowed down when the functional filler content was between 20wt% and 30wt%.The thermal decomposition temperature of the coating increased with the addition of functional filler.The tendency is increased,and the coating is more stable during heating;when the content of Ag+-PANI/MMT was 20wt%,the coating sterilization rate was 95.8%.When the content was 20wt%,the coating had the best anticorrosive effect before the corrosion,the surface of the coating was relatively smooth and relatively dense,and there was no large-area accumulation phenomenon.After the corrosion,there was no large-scale pitting corrosion around the functional filler,and there was still good integrity,and there was no crack on the coating.
关键词
蒙脱土
/
聚苯胺
/
银离子
/
防腐
/
抗菌
Key words
montmorillonite
/
polyaniline
/
silver ion
/
antiseptic
/
antibacterial
银离子-聚苯胺负载蒙脱土防腐抗菌涂层的制备及性能研究[J].
化工新型材料, 2020, 48(5): 223-228 DOI:
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