纳米复合双层防垢涂层的制备及其性能研究

摘要

Nano-composite bistratal antiscale coating for large chemical equipment was preparaed with epoxy modified organosilicone resin as base course material,with nano SiO2-epoxy modified organosilicone resin composite coating as surface course material.Through analyzing the ingredient ratio of each layer,and testing integrated performance of single-deck coating and double-deck coating by experiment,the results showed that hydrophobic of the bistratal composite coating could reach the best status (contact angle was 1 53.69°)with base course coating solvent content at 40 wt%,surface course coating resin content at 40 wt%,and namame-ter SiO2 content at 9 .1 wt%.As single-deck coating,double-deck coating had good resistance to chemical corrosion,ideal hardness(3H)and could be solidified at 1 50 ℃.Besides,the metal adhesion and anti-adhe-sion property were superior to nano-composite single-deck coating.It could reach the use standard of large chemical equipment.%以环氧改性有机硅树脂作为涂层的底层材料、纳米SiO2－环氧改性有机硅树脂复合涂层作为面层材料，制备适用于大型化工设备的纳米复合双层防垢涂层．通过对涂层各层涂料主要成分配比进行分析，并分别对单、双层涂层的综合性能进行测试，结果表明：在底层溶剂含量为40 wt％，面层树脂含量为40 wt％，纳米SiO2含量为9．1 wt％时，所制备出的双层复合涂层，其疏水性能达到最佳状态（接触角为153．69°）；双层涂层具有单层涂层良好的耐化学腐蚀性、理想的硬度（3H级）与150℃较低温固化等优点，而且其金属附着力和防粘污力明显优于纳米复合单层涂层，符合大型化工设备的使用标准．