期刊
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
卷 39, 期 1, 页码 55-61出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/01932691.2017.1293547
关键词
Cationic xanthan gum; chemical modification; rheological properties; viscosity; xanthan gum
资金
- Beijing Natural Science Foundation [2162031]
- National Basic Research Program of China (973 program) [2013CB733600]
- National Nature Science Foundation of China [21390202, 21436002]
In the present study, cationic xanthan gum (CXG) was synthesized to enhance the rheological property of xanthan gum (XG) by attaching quaternary amine groups to the backbone of XG. The efficacy of the substitution was confirmed by FT-IR spectra and C-13 NMR. The surface morphology was changed considerably as demonstrated by SEM. The examined rheological properties of XG and CXG include steady-state and dynamic rheological properties. The results show that quaternary amine groups are successfully grafted onto the XG molecule. Apparent viscosity, storage modulus, and loss modulus of CXG solutions are greater than those of XG solutions under the same conditions. It is moreover found that apparent viscosity and viscoelasticity increase with the degree of substitution. The data indicate that the modified XG has much better heat resistance.
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