前处理工艺对毛/涤织物疏水改性效果的影响

Influence of pretreatment process on superhydrophobic modification of wool/polyester fabric

针对毛/涤织物中羊毛和涤纶表面没有足够的反应活性位点,难以进行化学改性,制约了毛/涤织物在超疏水方面的表现等问题,先采用紫外光照射,再用过氧化氢对毛/涤织物进行前处理,使用二氧化硅对毛/涤织物进行疏水改性,通过静态接触角测试、扫描电镜观察、羊毛 Allw rden 反应实验等方法分析前处理工艺对织物疏水性能的影响。结果表明:当织物经紫外光照射后再用双氧水处理时,紫外光照射先使羊毛表面拒水性细胞膜消除,双氧水处理进一步破坏了羊毛表面的鳞片层,使羊毛表面暴露出较多的化学反应位点,因此,硅颗粒更容易沉积在羊毛表面,赋予羊毛织物超疏水特性。

The surface of wool and polyester fibers in wool/ polyester fabrics does not have enough chemical reactive sites, which lead to difficult chemical modification and also restrict the superhydrophobicperformanceofwool/polyesterfabrics.Therefore,wool/polyesterfabricswereirradiated with ultraviolet firstly, then hydrogen peroxide was adopted to pretreat wool/ polyester fabrics, and silica was adopted to hydrophobically modify wool/ polyester fabrics. The influence of superhydrophobic modification of cotton/ polyester fabrics by pretreatment process were explored by the static contact angle test, scanning electron microscopy and wool fiber surface scale analysis. The results show that when fabrics are treated by UV irradiation and then oxidized by hydrogen peroxide, water repellent films of wool surfaces are eliminated by ultraviolet irradiation, and after hydrogen peroxide treatment, scale structure of wool surfaces is further damaged, wool surface exposes more chemical reaction sites, therefore, coverage of silicon particles on the fibers surface is improved to endut wool fabrics with superhydrophobic properties.