Abstract
The present paper investigates the mixing temperature on the structure and performance of clay aerogel colloidal suspensions and their composites. Clay-polymer aerogels were prepared via an environmentally friendly freeze-drying technique and clay aerogel suspensions were subjected to various temperatures, namely room temperature (RT), 60, 70, 80 and 90°C, in order to better understand the architecturing of clay colloidal suspension and formulation mechanisms of advanced clay aerogel composites, and such develop the optimum processing parameters. This research demonstrated that the mixing temperature had a significant influence on the chemical interaction of the constituents and formulation of bonding/networking of clay aerogel colloidal suspension, and hence the microstructure and performance of the clay aerogel composites; by simply controlling the mixing temperature without altering the composition or adding any additive or increasing the solid content, it was possible to significantly increase the compressive modulus by up to 7 folds without sacrificing any of the physical property of clay aerogel composites.
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