mz7b00014_si_002.avi (4.65 MB)
One-Pot Synthesis and Characterization of Polyrotaxane–Silica Hybrid Aerogel
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posted on 2017-03-06, 13:50 authored by Lan Jiang, Kazuaki Kato, Koichi Mayumi, Hideaki Yokoyama, Kohzo ItoA novel kind of polyrotaxane–silica
hybrid aerogel is successfully
prepared via one-pot sol–gel synthesis in this work. The polyrotaxane
can chemically interpenetrate with Si particles homogeneously in nanoscale,
so as to shorten the gelation time and construct a flexible and mechanically
strong skeleton. The supramolecular effect ascribable to the sliding
motion of cyclic components in polyrotaxane is introduced into the
hybrid aerogel for the first time. Compared with the brittle pure
silica aerogel, the obtained polyrotaxane–silica hybrid aerogels
show very low density, low thermal conductivity, and more than two
orders magnitude improvement in the compression strength without compromising
transparency.