基于TiO₂腐蚀促进活性,提出了一种新型的“钛铜”复合防污剂,即TiO₂与金属铜粉混合后TiO₂加速Cu腐蚀释放具有防污性能的Cu²⁺。通过调节TiO₂的制备工艺调控其结构和性能,实现了Cu²⁺的可控释放,进而实现海洋防污涂层的制备。以国内硫酸法钛白生产企业的中间产品一次水解产物、碱中和一次水解产物、二次水解产物和二次水解产物外加金红石晶种为煅烧前驱体,重点考察了制备工艺、晶型、形貌、尺寸分布、材料功函数、氧还原催化活性、导电性等因素对“钛铜”复合防污剂释放Cu²⁺性能的影响,通过机器学习方法进一步定量分析了影响钛铜防污剂释放Cu²⁺性能的效果。结果表明,影响“钛铜”防污剂Cu²⁺释放性能的主要因素由高到低依次为晶型、带隙、晶粒尺寸、导带电位、电子转移数;400℃加热前驱体获得的TiO₂,其“钛铜”复合防污剂在实海挂片试验中的防污效果最好。

Based on the corrosion promoting activity of TiO₂,a novel “titanium-copper” composite antifouling agent is proposed,that is,TiO₂ mixes with metal copper powder to accelerate the corrosion of Cu and release Cu²⁺ that possesses antifouling performance.The structure and properties of TiO₂ are controlled by adjusting the preparation process to realize the controllable release of Cu²⁺,and further achieve the preparation of marine antifouling coatings.The intermediate products in a certain sulfuric acid-route titanium dioxide manufacturing company in China,including primary hydrolysis products,alkali neutralization primary hydrolysis products,secondary hydrolysis products and a mixture of secondary hydrolysis products plus rutile crystal seed are respectively used as the precursors for calcination.The impacts of preparation technology,crystal form,morphology,size distribution,material work function,oxygen reduction catalytic activity,electrical conductivity and other factors on the Cu²⁺-releasing performance of titanium-copper composite antifouling agent are investigated.The effect on Cu²⁺-releasing performance of titanium-copper antifouling agent is further quantitatively analyzed through machine learning method.Study results show that the main factors affecting the Cu²⁺-release performance of titanium-copper antifouling agent,in descending order,are crystal form,band gap,grain size,conduction band potential and electron transfer number.The titanium-copper composite antifouling agent using the TiO₂ obtained by heating the precursor at 400℃ has the best antifouling effect in the real sea hanging film test.