论文部分内容阅读
以多羟基为桥基增强硅烷偶联剂对纳米二氧化钛的改性效果,得到了分散性好的高浓度纳米二氧化钛水性分散浆,研究了该水性分散浆整理真丝织物后的紫外防护效果,并对整理工艺进行了优化.结果表明:多羟基为桥基可显著增强硅烷偶联剂对纳米二氧化钛的分散改性效果,所得高浓度纳米二氧化钛水性分散浆中的纳米粒子粒度小、分布均匀,在水中分散稳定性好,质量浓度达100 g/L的纳米二氧化钛水性分散浆放置4 d,沉降百分数仅为0.04%.纳米二氧化钛水性分散浆稀释后整理的真丝织物具有较强并持久的紫外屏蔽效果,优化整理工艺条件:纳米TiO2用量为6 g/L,浸渍30 min,整理液pH值为7,140℃焙烘3 min,整理后真丝织物UPF指数从整理前的7.52增加到69.52,50次洗涤后UPF指数仍达到61.47.
Polyhydroxyl was used as the bridge to enhance the modification effect of nano-TiO2 on the silane coupling agent, and a good dispersion of high concentration nano-TiO2 aqueous dispersion was obtained. The UV protection effect of the silk fabric was studied. The finishing process was optimized.The results showed that: the polyhydroxyl as a bridge can significantly enhance the dispersion modification effect of the silane coupling agent on the nano-titanium dioxide, the nano-particles in the high concentration nano-titania aqueous dispersion slurry have small particle size and uniform distribution, The dispersion stability of nano-titania aqueous dispersion with the mass concentration of 100 g / L was 4 days and the sedimentation percentage was only 0.04% .The silk fabric diluted with nano-titania aqueous dispersion had strong and durable UV shielding effect, Optimized finishing conditions: dosage of nano-TiO2 was 6 g / L, dipping for 30 min, pH value of finishing liquid was 7,140 ℃, baking for 3 min, UPF index of finishing silk fabric increased from 7.52 to 69.52 after finishing, UPF The index still reached 61.47.