Superhydrophobic and Ultraviolet-Blocking Cotton Textiles

作者：Wang, Lingling; Zhang, Xintong^*; Li, Bing; Sun, Panpan; Yang, Jikai; Xu, Haiyang; Liu, Yichun

来源：ACS Applied Materials & Interfaces, 2011, 3(4): 1277-1281.

DOI：10.1021/am200083z

• ultraviolet blocking
• superhydrophobicity
• ZnO@SiO2 core-shell nanorod
• cotton textile
• surface modification

Cotton textile was coated with ZnO@SiO2 nanorods in order to obtain superhydrophobic and ultraviolet (UV)-blocking properties. The coating process was conducted in mild conditions, which involved the low-temperature preparation of ZnO seeds, hydrothermal growth of ZnO nanorods, bioinspired layer-by-layer deposition of a SiO2 shell on the surface of ZnO nanorods, and hydrophobic modification of ZnO@SiO2 nanorods with octadecyltrimethoxysilane. Despite the highly curved morphology of cotton fibers, the ZnO@SiO2 nanorods coated the textile densely and uniformly. The treated cotton textile was found to have a large UV protection factor (UPF = 101.51) together with UV-durable superhydrophobicity, as determined by contact-angle measurement under long-term UV irradiation. The good UV-blocking property can be ascribed to the high UV absorbance and scattering properties of ZnO nanorods, and the UV-durable superhydrophobicity is a result of suppression of the photo activity of ZnO nanorods by a SiO2 shell.

• 出版日期2011-4
• 单位东北师范大学