In order to enhance the water repellence property of cotton fabric, cotton fabric was grafted using hexafluorobutyl methacrylate( HFMT) monomer via atom transfer radical polymerization( ATRP) method. Water repellent cotton fabric was successfully prepared, and characterized by scanning electron microscopy( SEM),Fourier transform infrared spectroscopy( FTIR), and X-ray photoelectron spectroscopy( XPS). The SEM images of the HFMT-treated cotton displayed significant difference from the untreated one. FT-IR characterization of the HFMTtreated cotton indicated that HFMT was successfully grafted onto the surface of the cotton fabric. XPS analysis indicated that the fluorine element of the HFMT-treated cotton existing on the surface of the cotton fabric. The surface contact angle test as well as the water repellence rating test showed that the water repellence of the HFMTtreated cotton fabric was much better than that of the untreated cotton fabric. The surface contact angle of the HFMT-treated cotton fabric could reach( 132. 4 ± 2. 2) °,and the water repellence rating could achieve grade 3. The washing durability of the HFMT-treated fabric was also investigated. The surface contact angle of the HFMTtreated cotton fabric could reach( 121. 1 ± 2. 1) ° after 20 washing times. Furthermore, the whiteness, air permeability, breaking strength,and breaking elongation of the HFMT-treated cotton fabric decreased slightly compared with the untreated cotton fabric.Finally,cotton fabric with good water repellence property and excellent washing durability could be obtained with little effect on the intrinsic properties of cotton fabric.
以含氟丙烯酸酯类单体与大分子引发剂在催化体系作用下通过原子转移自由基聚合(ATRP)制备了ABA型含氟聚丙烯酸酯-聚醚嵌段共聚物。用红外光谱(IR)、核磁共振氢谱(1H NMR)、凝胶渗透色谱(GPC)表征了产物结构,并研究了其表面活性。结果表明,在不加乳化剂情况下,由含氟聚丙烯酸酯-聚醚嵌段共聚物可以配制出粒径低于300 nm的稳定乳液,乳液表面张力可降低至23.9 m N/m;共聚物溶于乙酸乙酯中可显著降低后者的表面张力,用量相同时,随着共聚物疏水链段增长,其降低表面张力的效果越显著。当用量为0.5%时,溶液表面张力最低可降至19.6 m N/m。
