College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; Xi'an Key Laboratory of Green Chemicals and Functional Materials, Shaanxi University of Science and Technology, Xi'an 710021, China.
College of Bioresources Chemical and Materials Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; School of Material Science and Engineering, Shaanxi University of Science & Technology, Xi'an 710021, Shaanxi, China; College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, Shaanxi, China.
J Colloid Interface Sci. 2021 Oct;599:88-99. doi: 10.1016/j.jcis.2021.04.061. Epub 2021 Apr 16.
Amphiphilic Janus particles are characterized by their anisotropic morphology and unique physical and chemical properties. In the present research, amphiphilic Janus particles were used as stabilizing agents to prepare a fluorine-containing polyacrylate composite emulsion. The influences of the structure and dosage of amphiphilic Janus SiO particles and the amount of fluorine-containing monomer hexafluorobutyl methacrylate on the stability of the composite emulsion were investigated. It was noticed that when the hydrophilic and hydrophobic groups of Janus SiO particles were polyacrylamide and polymethyl methacrylate, respectively, the stabilization of the polyacrylate emulsion with Janus SiO particles was achieved. When 0.3 wt% of polyacrylamide/polymethyl methacrylate amphiphilic Janus SiO particles and 8 wt% of hexafluorobutyl methacrylate were used, a stable composite emulsion was obtained. The conversion rate reached 98.7% with an average particle size of 500 nm. The composite emulsion was applied for fabric finishing. The water contact angle of the fabric increased from 21.4° to 140.2°, demonstrating its greatly improved hydrophobicity. Therefore, it could be inferred that the synergistic effect of amphiphilic Janus SiO nanoparticles and hexafluorobutyl methacrylate improved the water resistance of the latex film.
两亲性 Janus 粒子具有各向异性的形态和独特的物理化学性质。本研究以两亲性 Janus SiO 粒子为稳定剂，制备含氟聚丙烯酸酯复合乳液。考察了 Janus SiO 粒子的结构和用量、含氟单体六氟丁基甲基丙烯酸酯的用量对复合乳液稳定性的影响。结果表明，当 Janus SiO 粒子的亲水和亲油基团分别为聚丙烯酰胺和聚甲基丙烯酸甲酯时，Janus SiO 粒子可以稳定聚丙烯酸酯乳液。当使用 0.3wt% 的聚丙烯酰胺/聚甲基丙烯酸甲酯两亲性 Janus SiO 粒子和 8wt% 的六氟丁基甲基丙烯酸酯时，可以得到稳定的复合乳液，转化率达到 98.7%，平均粒径为 500nm。将复合乳液应用于织物整理，织物的水接触角从 21.4°增加到 140.2°，表明其疏水性大大提高。因此，可以推断两亲性 Janus SiO 纳米粒子和六氟丁基甲基丙烯酸酯的协同作用提高了胶乳膜的耐水性。
