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    Fabrication, and characterization of polydimethylsiloxane/glycidol-grafted gelatin film

    Year: 2017

    Journal: J. Coat. Technol. Res., Volume 14, JAN, page 225–232

    Authors: Yue, Lei; Li, Jing; Zhu, Wei-Yue; Xu, Jing; Li, Tian-Duo

    Organizations: National Natural Science Funds of China [21376125]; National Natural Science Funds of Shandong Province [ZR2013BQ014, 2015GGX 108002]; Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province

    Keywords: Bio-compatible film; Polydimethylsiloxane-grafted gelatin; Glycidol-grafted gelatin; Hydrophobicity; Flexibility

    Polydimethylsiloxane or glycidol-grafted gelatin films with excellent flexibility and strong hydrophobicity were fabricated by mono epoxy-terminated polydimethylsiloxane (PDMS-E)-grafted gelatin (PGG) and glycidol-grafted gelatin (GGG). Mixed reactive aqueous solutions of PGG and GGG were poured into a Teflon mold. The solutions were dried slowly and eight films were obtained with a thickness of around 200 mu m, including gelatin film, PGG film, GGG film, and resulting films at gelatin/PGG/GGG ratios of 2.5:0.5:1.0, 5.0:1.0:1.0, 7.5:1.5:1.0, 10.0:2.0:1.0, and 5.0:1.0:3.0 (weight percentage). The microstructures of these films were confirmed by scanning electron microscopy, attenuated total reflection-Fourier transform infrared spectroscopy, atomic force microscopy, and small-angle X-ray scattering. The influence of the gelatin/PGG/GGG ratios was studied with respect to the hydrophobicity and the mechanical property of the films. The results showed that the contact angle of gelatin-based film increased from 76A degrees to 126A degrees after blending with gelatin, PGG, and GGG at 5.0:1.0:1.0 (weight percentage). Moreover, the elongation at break value of the film reached 3400%. The resulting films showed high flexibility and strong hydrophobicity, which is promising for high-performance coatings.
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