TiO_2纳米晶的低温制备及其抗紫外线性能  

TiO_2 Nanocrystalline Prepared at Low Temperature and its Anti-ultraviolet Performance

作　　者：邓桦[1,2] 李秀明[1] 肖长发[2] 

机构地区：[1]天津工业大学纺织学院 [2]天津工业大学改性与功能纤维天津市重点实验室

出　　处：《东华大学学报（自然科学版）》2009年第1期69-73,共5页Journal of Donghua University(Natural Science)

基　　金：天津自然科学基金资助项目(06YFJMJC02700)

摘　　要：采用溶胶-凝胶法，在低温条件下制备纳米TiO2，用X射线衍射（XRD）对其结构和粒径进行表征，并测试分析了纳米TiO2溶胶对紫外-可见光的透射和吸收特性．结果表明，制得的纳米TiO2为锐钛矿型纳米晶，粒子尺寸小于10nm.纳米TiO2溶胶在波长250-350nm的紫外光区透射率极小，在220-340nm区域出现强吸收峰．将制得的纳米TiO2制成整理剂用于织物的整理．经过处理的棉织物对紫外线的阻隔率明显提高，紫外线防护指数（UPF值）从未处理时的6．72增加到50以上，表现出优异的抗紫外线性能．Nano-TiO2 was prepared by sol-gel method at low temperature. The microstructure and particle size were characterized by X-ray Diffraction （XRD） techniques. Ultraviolet-visible transmittance and absorbability of the nano-TiO2 sols were tested. The results show that the produced nano-TiO2 is a nanocrystalline with anatase-phase and the size of particles is less than 10 nm. The transmittance of nano TiO2 sols are very low in the ultraviolet range （250 -350 nm） and there is a strong absorption between 220 and 340 nm. Furthermore, the prepared nano-TiO2 formed a finishing agent that was used to treat the fabrics. The UV-blocking of the treated fabrics increased obviously and ultraviolet protection factor （UPF value） increased from 6. 72 to more than 50, which indicated that the fabrics treated with nano-TiO2 obtained excellent anti-ultraviolet properties.

关 键 词：纳米TIO2 紫外-可见光谱 织物 抗紫外线 

分 类 号：TS195[轻工技术与工程—纺织化学与染整工程]