Abstract
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 μm, 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 76° to 126° 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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Acknowledgment
This work is supported by the National Natural Science Funds of China (No. 21376125), the National Natural Science Funds of Shandong Province (No. ZR2013BQ014, 2015GGX108002), and supported by the Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province.
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Yue, L., Li, J., Zhu, WY. et al. Fabrication, and characterization of polydimethylsiloxane/glycidol-grafted gelatin film. J Coat Technol Res 14, 225–232 (2017). https://doi.org/10.1007/s11998-016-9846-9
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DOI: https://doi.org/10.1007/s11998-016-9846-9