溶剂挥发法制备聚砜包覆桐油自修复微胶囊

以聚砜为壁材，桐油为芯材，采用溶剂挥发法制备了聚砜（PSF）包覆桐油自修复微胶囊。考查了不同种类的分散剂、搅拌速度、芯壁比（芯材与壁材的质量比）等工艺参数对微胶囊性能的影响，通过扫描电子显微镜、光学显微镜和热重分析仪等对微胶囊的表观形貌、粒径、壁厚、包覆率和热稳定性能等进行表征。采用所合成的微胶囊制备了环氧树脂基防腐蚀涂层，并对其防腐蚀性能进行了评价。结果表明，30 ℃时，以明胶/聚乙烯醇复配体系作为分散剂，芯材与壁材质量比为1.3:1，搅拌速度为700 r/min时制备出的微胶囊表面光滑致密，粒径在130 μm左右，热稳定温度为350 ℃；盐雾实验结果表明，所制备的微胶囊自修复涂层具有良好的防腐蚀性能。

Preparation of Polysulfone Containing Tung Oil Self-healing Microcapsules by Solvent Evaporation Method

Self-healing microcapsules were prepared by solvent evaporation method with polysulfone as shell, tung oil as core materials. The encapsulation parameters, including the kinds of dispersants，stirring speed, and mass ratio of core material to shell material were studied The surface morphology, particle size, shell thickness, encapsulation efficiency of microcapsules, and thermal properties were characterized by scanning electron microscopy, optical microscopy, thermo gravimetric analyzer, and other techniques. The outer surface of the microcapsules was smooth and compact when the gelatin/PVA solution acted as dispersants, the mass ratio of core to shell was 1.3:1, stirring speed was 700 r/min, and the average particle size was about 130 μm. The microcapsules was stable at 350 ℃. Epoxy resin anticorrosive coating was prepared by using the synthesized microcapsules. Salt spray test revealed that the prepared self-healing coating exhibited an excellent corrosion resistant function.