期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 223, 期 -, 页码 193-201出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.11.011
关键词
Xyloglucan; Tamarind seed; Acetylation; Characterization; Physicochemical property
资金
- National Natural Science Foundation of China [31871753]
- Shanghai Science and Technology Development Fund, Domestic Science and Technology Cooperation Project, China [21015800300]
- Natural Science Foundation of Shanghai, China [20ZR1439100]
Acetylation modification can improve the water-solubility and solution properties of xyloglucan from tamarind seeds (TSX). Increasing the degree of acetylation enhances the thermal stability and water-solubility of TSX, but also induces weak gelling property.
Acetylation modification was conducted to improve the water-solubility and solution properties of xyloglucan from tamarind seeds (TSX). Three acetylated TSX with different degree of substitution (DS) were successfully prepared, and their structure and molecular parameters were investigated by FT-IR, NMR, and high-performance size exclusion chromatography (HPSEC). Further, the effects of acetylation on the thermal stability, solubility, and rheological properties of TSX were studied. Results showed that acetyl groups were mainly substituted at the O-6 position of terminal galactose with DS of 0.2, 0.47, and 0.36 for AC-2, AC-5, and AC-10, respectively. HPSEC analysis indicated that molecular weight of acetylated derivatives decreased slightly, and the solution conformation became more flexible as the DS increase. By comparing with TSX, the thermal stability, water-solubility, solution transmittance, and zeta-potential of acetylated TSX were significantly improved as the DS increase. In addition, rheological studies demonstrated that acetylation reduced the shear viscosity, but high DS of acetylation could induce the weak gelling property of TSX. In conclusion, acetylation modification could be applied to improve the physicochemical properties of TSX and promote its further application in food and pharmaceutical industries.
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