Preparation of silica-silk fibroin-polyurethane composite films via a sol-gel route

Manabu Tsujino, Tetsuhiko Isobe, Mamoru Senna

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

A tetraethoxysilane (TEOS)-derived sol aged for 0 h-6 h at room temperature was mixed with a polyurethane (PU) matrix. A composite of silk fibroin (SF) powders and acrylamide (AAm) was dispersed in the sol-PU mixture and dried isothermally at temperatures between 25°C and 120°C to obtain composite films. Three competitive reactions take place, i.e., those between silica-silica, SF-PU and silica-organic phases, during formation of the composite films. These reactions determine the properties such as morphology and homogeneity of the composite films. IR absorption bands for amide groups (-CONH-), ν C double bond O (amide I, 1730 cm-1) and δ N-H (amide II, 1530 cm-1) become larger with decreasing aging time of TEOS-derived sol, or increasing drying temperature. DTA exothermic peak due to the thermal decomposition of SF-AAm composite, on the composite films prepared from the 0 h-aged sol or dried at more than 50°C, shifts toward higher temperature by 44 K or more than 63 K respectively, as compared to the SF-AAm composite. Shorter aging time of TEOS-derived sol and higher drying temperature increased the extent of dispersibility, among SF-AAm composite, PU and silica, to bring a composite film more homogeneous.

Original languageEnglish
Pages (from-to)785-789
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Volume19
Issue number1-3
DOIs
Publication statusPublished - 2000 Dec

Fingerprint

Fibroins
silk
Polyurethanes
Silk
Composite films
Polymethyl Methacrylate
Sols
Silicon Dioxide
Acrylamide
Sol-gels
Silica
routes
gels
silicon dioxide
preparation
composite materials
Amides
Composite materials
Drying
Polymers

ASJC Scopus subject areas

  • Ceramics and Composites

Cite this

Preparation of silica-silk fibroin-polyurethane composite films via a sol-gel route. / Tsujino, Manabu; Isobe, Tetsuhiko; Senna, Mamoru.

In: Journal of Sol-Gel Science and Technology, Vol. 19, No. 1-3, 12.2000, p. 785-789.

Research output: Contribution to journalArticle

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