Abstract
The reorganization of fumed silica gel formed in sulphuric acid medium after being broken has been studied using rheological measurements including thixotropy, gelling time, and gel strength determination according to the falling rod method. The original gel formed by fumed silica particles was also studied for comparison. The results showed that the segments yielded after the original gel was broken can reorganize into a new gel although its ability was weaker than that of fresh particles. The dispersed size of silica particles influenced both the formation of the original gel and the reorganization behavior. The smaller silica particles favored a prolonged gelling time but yielded a gel with relatively low strength. Comparatively, the tendency to reorganize was weaker than in the original gel formation. The standing temperature during the fresh gel formation showed less of an effect on the reorganization process.
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Fund support from Zhejiang Chaowei Power Co., Ltd. is gratefully acknowledged.
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Sun, X., Zhao, J. Reformation of Fumed Silica Gel After Being Broken. Silicon 9, 879–884 (2017). https://doi.org/10.1007/s12633-016-9517-6
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DOI: https://doi.org/10.1007/s12633-016-9517-6