摘要
本文利用纳米TiO2粉体,以聚乙烯吡咯烷（PVP）为分散剂和结构引导剂,以正硅酸乙酯（TEOS）为纳米SiO2前驱体,在纳米TiO2粉体表面包覆纳米SiO2,制备纳米TiO2-SiO2复合粒子。将纳米TiO2-SiO2复合粒子整理到棉织物上,并通过十六烷基三甲氧基硅烷（HDTMS）低表面能修饰后,得到抗紫外和超疏水复合功能棉织物。探究制备纳米TiO2-SiO2复合粒子的最佳工艺,并对复合粒子和处理后棉织物进行表征。结果表明,当PVP用量为0.025%,硅钛比例为2∶1,氨水用量为5 m L时,纳米SiO2包覆TiO2效果较好。处理棉织物的抗紫外指数（UPF）达115.42,紫外线UVA（320420 nm）透过率为3.35%,接触角为156.54°,滚动角为8°,具有优异的抗紫外、超疏水性能。此外,处理棉织物经过24 h紫外线照射后,接触角仍为152.73°,滚动角仍可达到9°,实现了耐紫外线稳定性。
The TiO2-SiO2 composite nanoparticles（ nano-TiO2 covered by SiO2 based on nano-TiO2powder） were successfully prepared by using polyvinylpyrrolidone（ PVP） as a dispersant and structural guiding agent,and tetraethyl orthosilicate（ TEOS） as the precursor of SiO2. The anti-ultraviolet and superhydrophobic multifunctional cotton fabrics were successfully obtained by the coating of TiO2-SiO2 composite nanoparticles followed by the modification of hexadecyltrimethoxysilane（ HDTMS）. The preparation technique of TiO2-SiO2 composite nanoparticles was explored, and the composite nanoparticles and treated cotton fabrics were characterized. The results showed that nano-TiO2 was covered well by nano-SiO2 when the PVP amount was 0. 025%,the silicon and titanium ratio was 2： 1,and the ammonium hydroxide amount was 5 m L. The treated cotton fabrics had the ultraviolet protection factor（ UPF） of 115. 42,the UVA（ 320-420 nm） transmittance of 3. 35%,the water contact angle（ CA） of 156. 54° and the shedding angle（ SHA） of 8°,showing the excellent anti-ultraviolet and superhydrophobic properties. Besides,the treated cotton fabrics still had the water CA of 152. 73° andthe SHA of 9°after UV irradiation for 24 h,achieving good stability of anti-ultraviolet radiation.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2016年第3期772-778,783,共8页
Bulletin of the Chinese Ceramic Society
基金
2013年上海高校青年教师培养资助计划项目(ZZGJD13038)
上海工程技术大学科研启动项目(2014-07)
上海市科学技术委员会项目资助(13DZ2294300)
