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Abstract: Chitin nano-fibers with positive and negative charges have
been, respectively, produced from partially deacetylated and
2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO)-mediated oxidized α-chitin. The
average diameters and lengths of the TEMPO-oxidized chitin nano-fibers (TOChN) were
14 ± 4.3 and 190 ± 140 nm, respectively, ... read moreand the average diameters and lengths of the
partially deacetylated chitin nano-fibers (DEChN) were 6 ± 1.7 and 320 ± 105 nm,
respectively. A partially deacetylated chitin nano-fiber film (DEChN-F), a
TEMPO-mediated and oxidized chitin nano-fiber film (TOChN-F), and a composite film
(DE-TO-ChN-F) consisting of a combination of the two were prepared by drying the
dispersions at 40 °C. The DEChN-F, TOChN-F, and DE-TO-ChN-F all have similar tensile
strengths of approximately 90 MPa; however, the chitosan film (Chitosan-F) had a
tensile strength of approximately 30 MPa. In addition, TOChN-F and DE-TO-ChN-F have a
thermal weight loss at 210 °C, and DEChN-F has a thermal weight loss at 280 °C.
DEChN-F was found to have antimicrobial activity with regards to Escherichia coli.
Finally, the chitin nano-fiber films could be slightly degraded by cellulase, which
provided a novel biological performance of the chitin nano-material.
Keywords: Chitin, Nano-fiber, Films, Antimicrobial activity, Enzymatic
Springer Open.read less
- Zhang, Yan, Jie Jiang, Liang Liu, Ke Zheng, Shiyuan Yu, and
Yimin Fan. "Preparation, assessment, and comparison of α-chitin nano-fiber films with
different surface charges." Nanoscale Research Letters 10, no. 1 (12, 2015):