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In this study, highly porous and low density silica–gelatin composite aerogels with excellent absorption capacity were obtained. The preparation process was as follows: firstly, the gel with stable network structure was formed by sol–gel method; secondly, after soaking the gel with hexamethyldisilazane solution, the aerogel was prepared by freeze-drying; finally, the aerogel was coated with hexamethyldisilazane...
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