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Synthesis of cellulose/silica gel polymer hybrids via in-situ hydrolysis method

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Abstract

Homogeneous cellulose/silica gel polymer hybrids were prepared by hydrolysis of acetyl cellulose (AcCL) in a sol–gel reaction mixture of alkoxysilane such as tetramethoxysilane (TMOS). To a mixture of AcCL and TMOS in a mixed solvent of THF and methanol (v/v, 7/3), an HCl aqueous solution was added to initiate hydrolysis and condensation of the alkoxysilane. The resulting mixture was constantly stirred for 5 h and heated at 60 °C for two weeks to allow evaporation of the solvents. Consequently, corresponding transparent and homogeneous polymer hybrids could be obtained in a range of mass ratios (AcCL/TMOS = 1/5–1/2). In the FT-IR spectra, the absorption peaks corresponding to the acetyl group decreased as the amount of 0.1 M aqueous HCl solution increased, which indicates hydrolysis of acetyl groups of AcCL, whereas the intensity of the Si–O-Si stretching vibration peak increased. The thermal properties of the obtained polymer hybrids were evaluated by TG/DTA and DSC measurements.

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Acknowledgements

The authors thank Ms. Emi Shindou, Mr. Naoki Hamamura, and Dr. Akira Yoshida of Nanotechnology Research Center, Tokyo City University for their help in SEM and XRD measurements.

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Correspondence to Takeru Iwamura.

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Iwamura, T., Akiyama, K., Hakozaki, T. et al. Synthesis of cellulose/silica gel polymer hybrids via in-situ hydrolysis method. Polym. Bull. 74, 4997–5009 (2017). https://doi.org/10.1007/s00289-017-2000-8

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  • DOI: https://doi.org/10.1007/s00289-017-2000-8

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