铝翅片用有机-无机杂化超亲水涂料的制备

以溶胶-凝胶法制得改性SiO2溶胶,然后与丙烯酸(AA)共聚得到有机-无机杂化材料,置换溶剂并调节pH后,制得水性有机-无机杂化超亲水涂料.研究了正硅酸乙酯(TEOS)和偶联剂KH-570的用量及pH对有机-无机杂化超亲水涂料的亲水性及水溶解率的影响.结果发现,当w(TEOS)=70％、pH=7和w (KH-570)=...

Preparation of organic-inorganic hybrid superhydrophilic coating for aluminum foil conditioner

An organic-inorganic hybrid material was synthesized by copolymerization of acrylic acid(AA) and modified SiO2 sol obtained by sol-gel method,and then used to prepare organic-inorganic hybrid superhydrophilic coatings by replacing solvent and adjusting pH.The effects of the amount of tetraethyl orthosilicate(TEOS) and coupling agent KH-570,and pH on the hydrophilicity and water dissolution rate of the coatings were studied.The results showed that the coating prepared with TEOS 70wt% and KH-570 3wt% at pH 7 has a water contact angle of 3° in early period,which is up to the demand of super-hydrophilicity.The water contact angle of the coating becomes 11.7° after dry and wet cycles for 30 times.The water dissolution rate of the coating is 16% after immersing in water for 100 h.The coating features an adhesion strength of 0 grade and a pencil hardness of 7H,and does not tarnish at 200 ℃ for 1 h.