Xu Lihui, Shen Yong, Ding Ying, Wang Liming
J Nanosci Nanotechnol. 2018 Oct 1;18(10):6879-6886. doi: 10.1166/jnn.2018.15463.
Superhydrophobic and ultraviolet (UV)-blocking cotton fabrics were prepared by the incorporation of TiO2/SiO2 composite nanoparticles followed by hydrophobization with hexadecyltrimethoxysilane (HDTMS). The TiO2/SiO2 composite nanoparticles were synthesized via sol-gel reaction with tetraethyl orthosilicate (TEOS) as the precursor in the presence of TiO2. As for the resulting products, characterization by Fourier-transform infrared spectrometry (FTIR), X-ray diffractometer (XRD) and scanning electron microscope (SEM) were performed respectively. The hydrophobicity measurement and ultraviolet-blocking property measurement showed that the obtained cotton fabric had a water contact angle of 159.3°, a water shedding angle of 8° and a large ultraviolet protection factor (UPF = 115.42) with UVA transmittance of 3.35%. The introduction of TiO2/SiO2 composite nanostructures onto fibers made the textiles rougher, which were highly beneficial to the formation of superhydrophobic surfaces. The high UV absorbance property of TiO2 imparted excellent UV-shielding property to the treated textiles, and effective blocking of the photoactivity of TiO2 by SiO2 resulted in the UV-durability of the superhydrophobicity on the textiles.
通过掺入TiO₂/SiO₂复合纳米颗粒，然后用十六烷基三甲氧基硅烷（HDTMS）进行疏水化处理，制备了超疏水和抗紫外线（UV）的棉织物。TiO₂/SiO₂复合纳米颗粒是在TiO₂存在的情况下，以正硅酸四乙酯（TEOS）为前驱体通过溶胶 - 凝胶反应合成的。对于所得产物，分别通过傅里叶变换红外光谱（FTIR）、X射线衍射仪（XRD）和扫描电子显微镜（SEM）进行表征。疏水性测量和抗紫外线性能测量表明，所获得的棉织物的水接触角为159.3°，水滑落角为8°，具有较大的紫外线防护系数（UPF = 115.42），UVA透过率为3.35%。在纤维上引入TiO₂/SiO₂复合纳米结构使织物更粗糙，这对超疏水表面的形成非常有利。TiO₂的高紫外线吸收性能赋予了处理后的织物优异的紫外线屏蔽性能，并且SiO₂对TiO₂光活性的有效阻断导致了织物超疏水性的紫外线耐久性。
