Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 34, Pages 17606-17611Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta04215a
Keywords
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Funding
- NPRP award from the Qatar National Research Fund (a member of The Qatar Foundation) [NPRP 6 - 892 - 1 - 169]
- US National Science Foundation [CHE-1337700]
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We present the synthesis of polymer cross-linked silica alcogels in a matter of seconds by illuminating the solution of TEOS, hexanedioldiacrylate, Eosin Y and amine with a laser beam (lambda = 532 nm). The heat of polymerization triggers gelation instantly. We demonstrate printing of 3D letters on different substrates using this technique. The physical properties of the 3D printed samples are comparable to conventionally prepared cross-linked silica aerogels, i.e., shrinkage (10.4%), density (0.56 g cm(-3)), Young's modulus (81.3 MPa) and BET surface area (155.3 m(2) g(-1)). An important aspect of this rapid gelation is that it allows 3D printing/lithography of reinforced silica aerogel material without using a mould.
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