氟硅共聚物的合成及其对环氧涂料改性的研究-高分子化学与物理专业论文.docxVIP

河北工业大学硕士学位论文 河北工业大学硕士学位论文 氟硅共聚物的合成及其对环氧涂料改性的研究 氟硅共聚物的合成及其对环氧涂料改性的研究 i i PAGE PAGE ii 氟硅共聚物的合成及其对环氧涂料改性的研究 摘 要 采用自由基乳液聚合法以丙烯酸全氟烷基乙基酯(FA)、乙烯基三乙氧基硅烷(VTES)、 苯乙烯(St)为共聚单体，制备了氟硅共聚物。 将制备的氟硅共聚物用于环氧涂料的改性，考察了共聚物加入量、溶剂用量及固化剂 种类和固化温度对改性环氧涂层疏水疏油性能的影响，发现当环氧涂料用量为 1 g，共聚 物加入量 0.05 g，溶剂用量 0.8 mL，固化剂为 TMA，用量为 0.1 g，且固化温度为 50℃×3 h + 150℃×1 h 时，改性环氧涂层的疏水角/疏油角达到最佳值。 考察了氟硅共聚物的合成条件对改性环氧涂层表面性能的影响，结果发现当含氟单体、 含硅单体、乳化剂及引发剂用量分别为单体总量的 40 wt%、10 wt%、3 wt%和 1 wt%时， 改性环氧涂层的疏水角达 118°，疏油角达 72°。 为了进一步提高环氧涂料的疏水疏油性能，将纳米二氧化硅添加到氟硅共聚物改性环 氧涂料中，当纳米二氧化硅用量为环氧涂料用量的 15 wt%，共聚物用量为 5 wt%时，涂层 表面呈现出粗糙的微纳米结构，疏水角提高到 149°，疏油角达 101°。 采用两步法制备改性环氧涂层，考察了底层表面结构对改性涂层表面性能的影响，结 果显示，底层的粗糙结构对表面的疏水疏油性能有影响。 对改性环氧涂层的力学性能和耐腐蚀性能进行了研究，测试结果表明，改性环氧涂层 的耐腐蚀性能得到了提高。 关键词： 环氧涂料，氟硅共聚物，丙烯酸全氟烷基乙基酯，乙烯基三乙氧基硅烷，疏水 疏油性，耐腐蚀性能 SYNTHESIS OF FLUOROSILICONE COPOLYMER AND ITS APPLICATION IN EPOXY COATING ABSTRACT The fluorosilicone copolymer was synthetized by free radicals emulsion polymerization and perfluoroalkyl acrylate(FA), vinyltriethoxysilane(VTES) and styrene (St) as comonomers. The copolymers were used to modifiy epoxy coating to improve the coating suface propereties. The effect of the addition of copolymer, solvent quantity, the type of curing agent and temperature on hydrophobicity and olephobicity of epoxy coating modified by copolymer were investigated. The results showed that when the epoxy coating was 1 g, copolymer addition 0.05 g, solvent consumption 0.8 mL, 0.1 g TMA as curing agent and curing temperature 50℃ for 3 hours and 150℃ for 1 hour, the water and oil contact angle of the modified epoxy coating reached the best. The effect of synthesis condition of copolymer on hydrophobicity and olephobicity of epoxy coating modified by copolymer were also investigated. The results indicated that when the amount of FA, VTES, emulsifier and initiator were 40 wt%, 10 wt%, 3 wt% and 1 wt% of the total monomers respectively, the water and oil contact angle of the epoxy coating modified by copolymer reached 118° and 72°. In order to further im