Issue 37, 2014
From the journal:

RSC Advances

Surface phthaloylation of chitin nanofiber in aqueous media to improve dispersibility in aromatic solvents and give thermo-responsive and ultraviolet protection properties

S. Ifuku,*a   N. Suzuki,a   H. Izawa,a   M. Morimotoa  and  H. Saimotoa  

* Corresponding authors

a Department of Chemistry and Biotechnology, Tottori University, Tottori 680-8552, Japan
E-mail: sifuku@chem.tottori-u.ac.jp
Fax: +81 857 31 5592
Tel: +81 857 31 5592

Abstract

Phthaloylation of chitin nanofiber (NF) was achieved by reaction with phthalic anhydride in aqueous media. The phthaloyl group was quantitatively introduced into an amino group of a surface-deacetylated chitin NF surface. The characteristic nanofiber network structure was maintained after phthaloylation. The NFs were dispersed homogeneously in organic solvents, and even in several aromatic solvents, due to the high solvation interactions with the phthaloyl group. In addition, the homogeneous dispersions in aromatic solvents had reversible thermo-responsive properties and exhibited a dispersive-to-precipitate phase transition response at approximately 25 °C. Due to the presence of the phthaloyl group, the NF dispersion and the nano-composite film cut harmful ultraviolet light.

Graphical abstract: Surface phthaloylation of chitin nanofiber in aqueous media to improve dispersibility in aromatic solvents and give thermo-responsive and ultraviolet protection properties

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Article information

DOI
https://doi.org/10.1039/C4RA01975J
Article type
Paper
Submitted
07 Mar 2014
Accepted
14 Apr 2014
First published
16 Apr 2014

RSC Adv., 2014,4, 19246-19250

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Surface phthaloylation of chitin nanofiber in aqueous media to improve dispersibility in aromatic solvents and give thermo-responsive and ultraviolet protection properties

S. Ifuku, N. Suzuki, H. Izawa, M. Morimoto and H. Saimoto, RSC Adv., 2014, 4, 19246 DOI: 10.1039/C4RA01975J

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