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(a) Stress-strain curve, solid-state MAS (b) 1H and (c) 29Si NMR spectroscopies (including the proposed molecular structure of silica-SF aerogel), and (d) thermogravimetric (TG) analysis of silica-SF aerogel scaffold. SF aerogel in (b) has undergone to the same freezing conditions as silica-SF aerogel.
