活性纳米TiO2改性含氟聚丙烯酸酯复合乳液的性能及应用

Preparation and Application of Fluorinated Polyacrylate Composite Emulsion Modified by Active nano TiO2

摘要:

以纳米TiO2 (Nano-TiO2)、-甲基丙烯酰氧乙基三甲氧基硅烷(KH570)、全氟辛基乙基丙烯酸酯（FM）等为主要原料，通过KH570改性纳米TiO2后，与丙烯基单体共聚制得了活性纳米TiO2改性含氟聚丙烯酸酯复合乳液。通过红外光谱（FT-IR）、原子力显微镜（AFM）及接触角测量仪等手段研究了共聚物的结构及性能。结果表明：改性纳米TiO2、含氟单体均成功引入到聚丙烯酸酯共聚物中；乳胶粒呈球形分布，表面光滑且呈单分散状态，平均粒径为184nm；与丙烯酸酯聚合物相比，改性后涂膜的粗糙度提高，有利于防水防油性能的提升。氟硅单体的加入使涂膜的接触角大大增加，对水和二碘甲烷的接触角分别为125°及110°， 复合乳液用作表面施胶剂对纸张进行测试后，纸张对水接触角为147°，对二碘甲烷接触角为133°，纸张防水防油性随着氟单体的引入而显著增加。

Abstract:

Fluorine-containing polyacrylate composite emulsion modified by active nano TiO2 was prepared with -methyl methacrylate alkoxy silane (KH570), nano - TiO2 modified by KH570, perfluorinated octyl ethyl acrylate (FM) as the main raw material, and copolymerized with propenyl monomers. The structure and performance of copolymer were studied by means of infrared spectroscopy (FT-IR), atomic force microscope (AFM) and contact angle measuring instrument. The results showed that the modified nano-TiO2 and fluorinated monomers were successfully introduced into polyacrylate copolymer. The granules were spherical, smooth and monodisperse with an average of 184nm. Compared with acrylate polymer, the roughness of modified film was improved, which was advantageous to the waterproof and oilproof. The addition of fluorine and silicon monomer largely increased the contact angle, and the contact angle of water and diiodomethane was 125° and 110° respectively. At last, the composite emulsion was used as a paper surface sizing agent, the water contact angle was 147°, the diiodomethane contact angle was 133°, the paper’s waterproof and oil repellency were significantly increased with the introduction of fluorine monomer.