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

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Abstract

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/SiO2 via 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.

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

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Publication details

The article was received on 21 Mar 2017, accepted on 28 Apr 2017 and first published on 19 May 2017


Article type: Paper
DOI: 10.1039/C7TA02498C
Citation: J. Mater. Chem. A, 2017, Advance Article
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    Green one-pot synthesis and processing of polyimide–silica hybrid materials

    L. Leimhofer, B. Baumgartner, M. Puchberger, T. Prochaska, T. Konegger and M. M. Unterlass, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA02498C

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