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研究亮点
使用 pH 驱动法制备 IDF-PPI-SA 三元复合水凝胶。
IDF-SA-PPI 的结构由氢键和静电作用主导。
IDF 的添加显著增强了三元体系的凝胶性能。
IDF 促进了 SA-PPI 水凝胶的结构结晶性。
研究结论
Fig. 1. Visual appearance of IDF-SA-PPI composite gels at varying IDF concentrations (0–3% w/v) and pH levels. IDF: Insoluble dietary fiber extracted from bamboo shoot by-products. SA: Sodium alginate. PPI: Pea protein isolate. IDF-SA-PPI: Ternary gels are prepared by adding varying amounts of IDF (0%–3% w/v) with SA and PPI.
Fig. 2. Fourier infrared spectra of composite gels with varying IDF concentrations at pH 1 and pH 2. (A): FTIR spectra of PPI, SA, and IDF. (B)Infrared spectra of composite gels at pH 1. (C). Infrared spectra of composite gels at pH 2.
Fig. 3. Thermogravimetric analysis (TGA) plots of composite gels with varying IDF concentrations at pH 1 and t pH 2. (A)TGA plots for IDF, PPI, and SA; (A1): DTG plots for IDF, PPI, and SA. (B): TGA plots of composite gels with varying IDF contents at pH 1. (B1): DTG plots of composite gels with varying IDF contents at pH 1. (C):TGA plots of composite gels with varying IDF contents at pH 2. (C1) DTG plots of composite gels with different varying IDF contents at pH 2.
Fig. 4. X-ray diffraction (XRD) patterns of composite gels with varying IDF concentrations at pH 1 and pH 2. (A) XRD of PPI, SA, and IDF. (B): XRD of composite gel at pH 1. (C): XRD of composite gel at pH 2.
Fig. 5. SEM of composite gels with varying IDF concentrations at pH 1 and pH 2.
Fig. 6. Variation of energy storage modules (G′) and loss modulus (G″) with the frequency of composite gels with varying IDF concentrations at pH 1 and pH 2. (A):Variation of storage modules (G′) with frequency for composite gels with different IDF contents at pH 1 and 2. (B):Variation of loss modules (G″) with frequency for composite gels with different IDF contents at pH 1 and pH 2.
Fig. 7. Impact of IDF concentration on the water-holding capacity of composite gels at pH 1 and pH 2.
Fig. 9. Effect of IDF on MRI images of composite gels at pH values of 1 and 2. The color bar is used to scale the density of protons from various water molecules: red color indicates the higher density of protons, and blue color indicates the lower density.
https://doi.org/10.1016/j.foodhyd.2024.110852
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肉与肉制品 蛋与蛋制品 水产品 奶及奶制品
豆及豆制品 果蔬及果蔬制品 大米及米制品 食用菌
炎症性肠病 糖尿病 肝病 神经疾病
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