Langmuir, 2007, 23, 327-331. Controllable Water Permeation on the Poly (N- isopropylacrylamide) Modified Nanostructured Copper Mesh Film,
作者:Wenlong Song, Fan Xia, Yubai Bai, Fengqi Liu, Taolei Sun, Lei Jiang
关键字:responsive permeation, PNIPAm, ATRP
论文来源:期刊
发表时间:2015年
Water permeation is important for
various applications in industry, agriculture, and daily life. However, most
research mainly focuses on the static wettability on different surfaces, and the
dynamic properties of the micro- and nanostructure-enhanced responsive
wettability is lacking. And the relevant application research is rare, which
still remains a challenge. Herein we report the temperature-controllable water
permeation on a poly(N-isopropylacrylamide)-modified nanostructured
copper mesh film. At low temperatures (below 25 °C), the film shows good water
permeability because of the highly hydrophilic nature, and as a result, the
water can easily penetrate through the film. At high temperatures (above 40 °C),
it is impermeable to water because of the superhydrophobicity and the large
negative capillary effect induced by the micro- and nanostructures. The
excellent controllability of water permeation on this film may be convenient for
use in many processes including filtration, water/oil separation, and so on. A
detailed investigation indicates that the special nanostructures and the
appropriate size of the microscale mesh pores not only influence the static
contact angles of the mesh film, but also, more importantly, greatly improve the
dynamic properties of wettability at different temperatures simultaneously,
which plays a crucial role in the excellent controllability over water
permeation on this film. This work may also provide interesting insight into the
design of novel functional devices that are relevant to surface wettability.