超重力旋转床用亲水涂料的制备和性能  

Preparation and Properties of Hydrophilic Coating for Supergravity Rotating Bed

作　　者：胡晨[1] 邓先和[1] 丁凯利[1] 

机构地区：[1]华南理工大学化学与化工学院,广州510641

出　　处：《表面技术》2016年第10期135-140,共6页Surface Technology

摘　　要：目的为减少多级离心雾化超重力旋转床气体出口过量的雾沫夹带现象,针对以金属丝网为填料的旋转床,制备一种具有优秀耐热性能及耐腐蚀性能,且能良好附着于金属丝网上的亲水涂层,以提升超重力旋转床的除雾性能及塔板效率。方法以具有亲水性的丙烯酸、丙烯酸羟丙酯、丙烯酰胺为共聚单体,采用水溶液聚合法合成亲水性丙烯酸树脂,系统研究了合成时亲水性单体用量、引发剂用量、反应时间、反应温度、乳化剂等参数对涂膜亲水性能的影响,通过热重分析、接触角测试、红外光谱、3D形貌仪等性能测试,对产物的综合性能进行了系统研究。结果确定了涂层亲水性的最佳反应条件为:引发剂质量分数为0.1%,AA摩尔分数为50%,反应时间为5 h,反应温度为30℃。此时产物的初期接触角为11.7°,持续接触角为16.2°且硬度为2,附着力1级,耐蚀性能良好。结论获得了符合超重力旋转床要求的亲水涂层,在多级离心雾化超重力旋转床上具有良好的应用,减少了超重力旋转床中低气速下的雾沫夹带现象。To reduce the excess entrainment phenomenon at gas outlet of multistage centrifugal spraying supergravity rotating bed, the work prepares a kind of hydrophilic coating of excellent heat and corrosion resistant ability with good adhesion to the metal mesh in respect of rotating bed filled with metal wire so as to improve defogging performance and plate efficiency of supergravity rotating bed. By taking hydrophilic acrylic acid, hydroxypropyl acrylate and acrylamide as comonomer and synthesizing hydrophilic acrylic resin in virtue of aqueous solution polymerization method, the work studied effects of such parameters as hydrophilic monomer dosage, initiator dosage, reaction time, reaction temperature and emulsifier on coating hydrophilic properties. In addition, the work studied overall performance of the product systematically through performance tests including thermal gravimetric analysis, contact angle test, infrared spectrum, 3D topography instrument. The optimum reaction conditions of hydrophilic coating were： initiator mass fraction of 0.1%, AA mole fraction of 50%, reaction time of 5 h and reaction temperature of 30 ℃. By the time, the initial contact angle was 11.7°, continuous contact angle was 16.2°and hardness was 2, adhesive force was grade 1 and acid resistance was favorable. Hydrophilic coating meeting requirements of supergravity rotating bed is obtained and has good application to multistage centrifugal spraying supergravity rotating bed, preferably reducing entrainment phenomenon at low gas velocity in supergravity rotating bed.

关 键 词：多级离心雾化超重力旋转床 雾沫夹带 水溶液聚合法 丙烯酸树脂 亲水性 附着力 性能测试 

分 类 号：TQ630.7[化学工程—精细化工]