纳米纤维素室温诱导下的金红石型纳米二氧化钛制备及其紫外线屏蔽性能

Preparation and UV shielding of rutile nano-TiO_(2) by induction of nanocrystal-cellulose at room temperature

为制备具有优异紫外线防护性能的纳米纤维,采用四氯化钛为钛源,纳米纤维素(NCC)为模板,在室温条件下诱导制备了屏蔽紫外线用金红石型纳米二氧化钛。并研究了反应温度、反应时间和四氯化钛的使用量对金红石型纳米TiO_(2)质量分数的影响。通过设计正交试验优化出纳米二氧化钛最佳的制备条件:反应温度为25℃,反应时间为1 h,四氯化钛用量为3 mL,并对其微观结构及屏蔽紫外线性能进行表征。结果表明,纯金红石型纳米TiO_(2)的分散性好,呈“刺球状”,粒径为100~250 nm。通过该纳米二氧化钛整理后的棉织物抗紫外线性能优异,紫外线防护系数大于40,证明此方法制备的金红石型纳米TiO_(2)具有良好的紫外线屏蔽性能。

In order to prepare nanofiber with improved ultraviolet(UV)protection performance,rutile nano-TiO_(2) for UV shielding was prepared by using TiCl_(4) as titanium source and nanocrystal-cellulose(NCC)as template at room temperature,and the effects of reaction temperature,reaction time and the dosage of titanium tetrachloride on the mass fraction of rutile nano-TiO_(2) were studied.Orthogonal experiments were adopted to optimize the preparation conditions of nano-TiO_(2),where reaction temperature was 25℃,reaction time was 1 h and dosage of TiCl_(4) was 3 mL,and then the microstructure and UV resistance of the nano-TiO_(2) were characterized.The results showed that the pure rutile nano-TiO_(2) was well dispersed and has a spiny spherical shape with a particle size of 100-250 nm.The cotton fabric treated with nano-TiO_(2) offers UV resistance with UPF>40,which is regarded as excellent.The rutile nano-titanium dioxide prepared by this method has good UV shielding performance,indicating that rutile nano-TiO_(2) prepared by this method has good UV shielding property.