含氟环氧树脂杂化纳米二氧化硅超疏水材料的制备与性能

Preparation and Performance of Hybrid Superhydrophobic Materials from Fluorinated Epoxy Resin and Silica Nanoparticles

目前超疏水材料的制备方法大都存在着制备工艺复杂的缺点。本文采用传统自由基聚合方法,以甲基丙烯酸缩水甘油酯(GMA)和苯乙烯(St)为单体,合成具有交联性的前驱聚合物P(GMA-r-St)。再用三氟乙酸(TFA)对其进行接枝改性,制备含氟环氧聚合物P(GMA-r-St)-g-TFA。利用γ-氨丙基三乙氧基硅烷(KH-550)改性纳米二氧化硅(SiO2),对其进行傅里叶变换红外光谱(FTIR)、热重(TG)表征。氨基改性的纳米二氧化硅与含氟环氧聚合物混合制备的超疏水改性材料,棉织物表面经其浸泡,可快速构建超疏水结构。通过改变改性纳米颗粒的含量,探究其构筑的棉织物的疏水性能和耐溶剂性能。研究结果表明,经浸泡改性的棉织物,水接触角为160°,耐溶剂性时间为130min,具备很好的耐溶剂性。该方法可广泛应用于多种基底材料表面的疏水改性。

At present, there are many preparation methods for superhydrophobic materials, but most of them have the disadvantages of complicated preparation processes. In this paper, the traditional free radical polymerization method was used to prepare super-hydrophobic materials with excellent performance by simple operation using organic and inorganic materials commonly used in the market as raw materials. The method for preparing superhydrophobic materials in this study can be widely applied to hydrophobic modification of various substrate materials. The crosslinkable precursor polymer P(GMA-r-St) was synthesized by conventional radical polymerization using glycidyl methacrylate(GMA) and styrene(St) as monomers. Further , it was graft-modified with trifluoroacetic acid(TFA) to prepare a fluorine-containing epoxy polymer P(GMA-r-St)-g-TFA. Nano-silica(SiO2) was modified by γ-aminopropyltriethoxysilane(KH-550) and characterized by Fourier transform infrared spectroscopy(FTIR) and thermogravimetry(TG). A superhydrophobic modified material prepared by mixing amino-modified nano-silica with a fluorine-containing epoxy polymer, and the surface of the cotton fabric is soaked to rapidly construct a super-hydrophobic structure . By changing the content of modified nanoparticles, the hydrophobic properties and solvent resistance of the constructed cotton fabrics were investigated. The results show that the cotton fabric with immersion modification has a water contact angle of 160° and a solvent resistance time of 130 min, which has good solvent resistance.