数字农科院2.0

Tailoring microstructure and mechanical properties of pectin cryogels by modulate intensity of ionic interconnection

文献类型: 外文期刊

作者: Ma Y.;Bi J.;Wu Z.;Feng S.;Yi J.

作者机构:

关键词: Cryogel;Ice crystal;Low methoxyl pectin;Porous microstructure;Texture

期刊名称: International Journal of Biological Macromolecules

ISSN: 0141-8130

年卷期: 2024 年 262 卷

页码:

收录情况: SCIE(2024版) ; ; EI(2024版)

摘要: Porous morphology and mechanical properties determine the applications of cryogels. To understand the influence of the ionic network on the microstructure and mechanical properties of pectin cryogels, we prepared low-methoxyl pectin (LMP) cryogels with different Ca2+ concentrations (measured as R-value, ranging from 0 to 2) through freeze-drying (FD). Results showed that the R-values appeared to be crucial parameters that impact the pore morphology and mechanical characteristics of cryogels. It is achieved by altering the network stability and water state properties of the cryogel precursor. Cryogel precursors with a saturated R-value (R = 1) produced a low pore diameter (0.12 mm) microstructure, obtaining the highest crispness (15.00 ± 1.85) and hardness (maximum positive force and area measuring 2.36 ± 0.31 N and 12.30 ± 1.57 N·s respectively). Hardness showed a negative correlation with Ca2+ concentration when R ≤ 1 (−0.89), and a similar correlation with the porosity of the gel network when R ≥ 1 (−0.80). Given the impacts of crosslinking on the pore structure, it is confirmed that the pore diameter can be designed between 56.24 and 153.58 μm by controlling R-value in the range of 0–2. © 2024

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