Green one-pot synthesis and processing of polyimide–silica hybrid materials

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2017
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Leimhofer, Lukas
Baumgartner, Bettina
Puchberger, Michael
Prochaska, Thomas
Konegger, Thomas
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Inorganic–organic hybrid materials allow for combining features typical of the inorganic component with those of the organic component in one material. Generally, the preparation of organic and inorganic compounds requires considerably different synthesis conditions. Hence, the development of one-pot routes to inorganic–organic hybrid materials is challenging. We herein report a fully green one-pot synthesis of polyimide/silica (PI/SiO2) hybrids. Specifically, we co-condense both components hydrothermally, using nothing but the respective precursors and water. Furthermore, we show that the PI and the SiO2 component can be covalently connected under hydrothermal conditions, using the compatibilizer (3-aminopropyl)-triethoxysilane. We thoroughly investigate the effect of different reaction conditions, including temperature, pH, precursor concentration and reaction time on the morphology and crystallinity of the final materials. The polyimide component, poly(hexamethylene pyromellitimide) was chosen for its thermoplasticity, which allows for processing both the PI and the PI/SiO2via sintering. For being a solvent-free method, sintering qualifies as a green processing technique. This work is the first report of the simultaneous hydrothermal condensation of an inorganic and an organic material.

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ISO 690LEIMHOFER, Lukas, Bettina BAUMGARTNER, Michael PUCHBERGER, Thomas PROCHASKA, Thomas KONEGGER, Miriam M. UNTERLASS, 2017. Green one-pot synthesis and processing of polyimide–silica hybrid materials. In: Journal of Materials Chemistry A. Royal Society of Chemistry (RSC). 2017, 5, pp. 16326-16335. ISSN 2050-7488. eISSN 2050-7496. Available under: doi: 10.1039/C7TA02498C
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@article{Leimhofer2017Green-54952,
  year={2017},
  doi={10.1039/C7TA02498C},
  title={Green one-pot synthesis and processing of polyimide–silica hybrid materials},
  volume={5},
  issn={2050-7488},
  journal={Journal of Materials Chemistry A},
  pages={16326--16335},
  author={Leimhofer, Lukas and Baumgartner, Bettina and Puchberger, Michael and Prochaska, Thomas and Konegger, Thomas and Unterlass, Miriam M.}
}
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