Stability of partially deacetylated chitin nano-fiber dispersions mediated by protonic acids

Zhiguo Wang; Hui Li; Liang Liu; Jie Jiang; Ke Zheng; Helen Ocampo; Yimin Fan

doi:10.21967/jbb.v1i3.47

Stability of partially deacetylated chitin nano-fiber dispersions mediated by protonic acids

doi: 10.21967/jbb.v1i3.47

a. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
b. Jiangsu Provincial Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;
c. Department of Chemical Engineering, University of New Brunswick, Fredericton New Brunswick, Canada

基金项目:

This research was supported by the National Forestry Public Welfare Industry Research Project (201304609), the National Natural Science Foundation of China (31100426), and Specialized Research Fund for the Doctoral Program of Higher Education of China (20133204110008). The authors are grateful for the support of Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University.

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出版历程

Stability of partially deacetylated chitin nano-fiber dispersions mediated by protonic acids

a. Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology, College of Light Industry Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;
b. Jiangsu Provincial Key Lab of Biomass-based Green Fuel & Chemicals, College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, China;
c. Department of Chemical Engineering, University of New Brunswick, Fredericton New Brunswick, Canada

Funds:

摘要

摘要: Partially deacetylated chitin nano-fiber (DAChN) dispersions were prepared using mechanical treatment of partially deacetylated crab shell α-chitin under acidic conditions mediated by various protonic acids. The representative organic acids had a better efficiency in terms of mediating the nanofibrillation of chitin fibers in comparison to the inorganic acid (HCl). The DAChN dispersed in water at a pH of 3.5 mediated by gluconic acid exhibited the highest yield of nano-fibers (88.6%), followed by succinic, itaconic, and ascorbic acids with a nano-fiber yield of 79.9%, 73.3% and 66.0%, respectively. The pH, conductivity, viscosity, and light transmittance of dispersions were assessed under different storage times. All of the tested DAChN dispersions were stable for at least 15 weeks at 4℃.
- partially deacetylated chitin nano-fiber /
- protonic acid mediation /
- dispersion stability
Abstract: Partially deacetylated chitin nano-fiber (DAChN) dispersions were prepared using mechanical treatment of partially deacetylated crab shell α-chitin under acidic conditions mediated by various protonic acids. The representative organic acids had a better efficiency in terms of mediating the nanofibrillation of chitin fibers in comparison to the inorganic acid (HCl). The DAChN dispersed in water at a pH of 3.5 mediated by gluconic acid exhibited the highest yield of nano-fibers (88.6%), followed by succinic, itaconic, and ascorbic acids with a nano-fiber yield of 79.9%, 73.3% and 66.0%, respectively. The pH, conductivity, viscosity, and light transmittance of dispersions were assessed under different storage times. All of the tested DAChN dispersions were stable for at least 15 weeks at 4℃.
- partially deacetylated chitin nano-fiber /
- protonic acid mediation /
- dispersion stability