Journal
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
Volume 37, Issue 9, Pages 1368-1374Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2015.1101609
Keywords
Characterization; coacervate; degree of substitution; gum arabic; O-carboxymethyl chitosan
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Funding
- National Natural Science Foundation of China [31571890]
- Shandong Provincial Natural Science Foundation [ZR2015CM037]
- Innovation Plan of the Science and Technology Plan of Shenzhen [JCYJ201303311]
- Shenzhen Key Fundamental Project Program [JC201105201225A]
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Three O-carboxymethylated chitosans (O-CMCs) with degrees of substitution (DS) 0.41, 0.51, and 0.83 were synthesized and the effects of the DS of O-CMC on its coacervation with gum Arabic (GA) and partial characteristics of resultant coacervates were investigated. All the O-CMCs exhibited the same optimum pH of 3.0 for coacervation with GA and the O-CMC-GA coacervates displayed similar differential scanning calorimetry (DSC) patterns, thermogravity (TG) profiles, and porous microstructures, but differed markedly in their rheological properties. As the O-CMC DS increased, the elasticity of the coacervates raised accordingly. It was concluded that O-CMC-GA coacervates with desired viscoelasticity can be obtained by varying the DS of O-CMC.
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