Fabrication of superhydrophobic and antibacterial surface on cotton fabric by doped silica-based sols with nanoparticles of copper

被引:147
作者
Berendjchi, Amirhosein [1 ]
Khajavi, Ramin [1 ]
Yazdanshenas, Mohammad Esmaeil [2 ]
机构
[1] Islamic Azad Univ, Dept Text Engn, S Tehran Branch, Tehran, Iran
[2] Islamic Azad Univ, Dept Text Engn, Yazd Branch, Yazd, Iran
来源
NANOSCALE RESEARCH LETTERS | 2011年 / 6卷
关键词
cotton; superhydrophobicity; antibacterial; sol-gel method; contact angle; WATER-REPELLENT; SILVER NANOPARTICLES; FIBERS;
D O I
10.1186/1556-276X-6-594
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The study discussed the synthesis of silica sol using the sol-gel method, doped with two different amounts of Cu nanoparticles. Cotton fabric samples were impregnated by the prepared sols and then dried and cured. To block hydroxyl groups, some samples were also treated with hexadecyltrimethoxysilane. The average particle size of colloidal silica nanoparticles were measured by the particle size analyzer. The morphology, roughness, and hydrophobic properties of the surface fabricated on cotton samples were analyzed and compared via the scanning electron microscopy, the transmission electron microscopy, the scanning probe microscopy, with static water contact angle (SWC), and water shedding angle measurements. Furthermore, the antibacterial efficiency of samples was quantitatively evaluated using AATCC 100 method. The addition of 0.5% (wt/wt) Cu into silica sol caused the silica nanoparticles to agglomerate in more grape-like clusters on cotton fabrics. Such fabricated surface revealed the highest value of SWC (155 degrees for a 10-mu l droplet) due to air trapping capability of its inclined structure. However, the presence of higher amounts of Cu nanoparticles (2% wt/wt) in silica sol resulted in the most slippery smooth surface on cotton fabrics. All fabricated surfaces containing Cu nanoparticles showed the perfect antibacterial activity against both of gram-negative and gram-positive bacteria.
引用
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页码:1 / 8
页数:8
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