writer：Liu, BJ (Liu, Baojiang) ; Wang, LL (Wang, Lili) ; Gao, YJ (Gao, Yujie) et al.
keywords：cotton; super-hydrophobicity; photoreactive silica nanoparticles
source：期刊
specific source：TEXTILE RESEARCH JOURNAL DOI: 10.1177/0040517514557316
Issue time：2015年
In this research, a novel method was developed to improve the super-hydrophobic stability of cotton fabrics without affecting the washing ability. The cotton fabrics were treated with hybrid photoreactive silica nanoparticles (denoted as silica-N-3) and hexadecyltrimethoxysilane under ultraviolet light. Silica nanoparticles were synthesized by grafting an azido group onto silica and confirmed by proton nuclear magnetic resonance, carbon-13 nuclear magnetic resonance and Fourier transform infrared spectroscopy. Untreated and treated cotton fabrics were characterized by scanning electron microscopy, X-ray photoelectron spectroscopy and thermogravimetric analysis. Wettability was investigated by water contact angle (WCA) and water shedding angle (WSA). Moreover, the super-hydrophobic durability of coated cotton fabrics was evaluated by washing tests. The results showed that the treated cotton fabrics exhibited excellent chemical stability and outstanding non-wettability with a WCA of 154.9 degrees for a 5 mu L water droplet and a WSA of 8.7 degrees for a 15 mu L water droplet. In addition, the super-hydrophobic cotton fabric showed excellent washing durability. After 30 cycles, the contact angle was still larger than 135 degrees.