Control the Surface Wettability of Thermo-Responsive Poly(Ethylene Glycol Methyl Ether methacrylate-co-Triethylene Glycol Methyl Ether Methacrylate) Thin Film by Varying Temperature

Abstract:

The surface wettability of thermo-responsive random poly (ethylene glycol methyl ether methacrylate-co-triethylene glycol methyl ether methacrylate), abbreviated as P(MEOMA-co-MEO₃MA), was investigated in thin film. UV-Vis spectroscopy shows that the LCST of P(MEOMA-co-MEO₃MA) with molar ratios of 0:20, 6:14 and 9:11 were 43°C, 32 ^oC and 25 ^oC, respectively. LCST shifts towards lower temperature when molar ratio of MEOMA increases. ATR-FTIR indicates that P(MEOMA-co-MEO₃MA) thin film experienced a collapse when the temperature passes its LCST. The contact angle of the paraffin oil on the film decreases 15^o when the temperature is above its LCST, which confirms the surface wettability can be controlled. Atomic force microscopy shows the surface of the swollen thin film becomes rougher when above it LCST.

• Periodical: Key Engineering Materials (Volume 873)
• Pages: 53-58
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.873.53
• Online since: January 2021
• Authors: Yang Yi Chen*, Min Pan, Shan Hong Hu, Qi Huan, Chu Yang Zhang
• Keywords: Oil Contact Angle, Spin-Coating, Thermo-Responsive Polymer, Thin Film

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