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Citation: PENG Shun-Jin, ZHAO Lei, WU Li-Min. Surface Properties of Fluorinated Acrylate Polymers Latex Films[J]. Acta Physico-Chimica Sinica, ;2007, 23(04): 531-536. doi: 10.1016/S1872-1508(07)60034-5 shu

Surface Properties of Fluorinated Acrylate Polymers Latex Films

1.
College of Science, Wuhan University of Science & Technology (Huangjiahu Campus), Wuhan 430065, P. R. China; College of Material & Metallurgy Science, Wuhan University of Science &Technology, Wuhan 430081, P. R. China; Department of Material Science, Fudan University, Shanghai 200433, P. R. China

Received Date: 12 October 2006
Available Online: 3 April 2007

The surface chemical compositions of fluorinated latex films and the dynamic contact angle of water were determined using X-ray photoelectron spectroscopy (XPS) and a Krüss interface tension measurement, respectively. The surface tensions of the films were calculated by the equation of state approach using the dynamic contact angles, and the effect of temperature on the wetting behavior of these films was investigated. It was shown that the F 1s signal intensity from the outermost surface of these fluorinated latex films was stronger than that from the interior surface of the film and that the surface tension showed a linear decrease with the increase of density of fluorine atom on the latex film surface to a certain extent. The surface tensions rapidly decreased with the increase of fluorinated lateral chains (Rf) content in the copolymer with longer Rf (carbon atomnumber n＞6). The water receding contact angles (θr) on the latex films sharply decreased with the increase of n value, leveled off nearly at n=10, and almost remained unchanged when n＞10. In addition, θr increased more remarkably with the increase of F content in the poly (protonated acrylate-co-fluorinated acrylate) with shorter hydrocarbon side chains. The water wetting ability of the fluorinate latex films became slightly better only when temperature was more than 40 ℃.
- Fluorinated acrylate polymer; Latex film; Surface property; XPS; Dynamic contact angle
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