共价果胶/阿拉伯木聚糖水凝胶：流变学和微观结构表征

Covalent Pectin/Arabinoxylan Hydrogels: Rheological and Microstructural Characterization.

作者信息

Lara-Espinoza Claudia, Rascón-Chu Agustín, Micard Valérie, Antoine-Assor Carole, Carvajal-Millan Elizabeth, Troncoso-Rojas Rosalba, Ohlmaier-Delgadillo Federico, Brown-Bojorquez Francisco

机构信息

Research Center for Food and Development, CIAD, A.C., Carretera Gustavo Enrique Astiazaran Rosas No. 46, Col. La Victoria, Hermosillo 83304, Sonora, Mexico.

IATE, INRAE, Institut SupAgro, University Montpellier, 34000 Montpellier, France.

出版信息

Polymers (Basel). 2024 Oct 20;16(20):2939. doi: 10.3390/polym16202939.

DOI:10.3390/polym16202939

PMID:39458767

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11510807/

Abstract

This research aimed to evaluate the gelation process of ferulated pectin (FP) and ferulated arabinoxylan (AXF) in a new mixed hydrogel and determine its microstructural characteristics. FP from sugar beet () and arabinoxylan from maize () bran were gelled via oxidative coupling using laccase as a crosslinking agent. The dynamic oscillatory rheology of the mixed hydrogel revealed a maximum storage modulus of 768 Pa after 60 min. The scanning electron microscopy images showed that mixed hydrogels possess a microstructure of imperfect honeycomb. The ferulic acid content of the mixed hydrogel was 3.73 mg/g, and ferulic acid dimer 8-5' was the most abundant. The presence of a trimer was also detected. This study reports the distribution and concentration of ferulic acid dimers, and the rheological and microstructural properties of a mixed hydrogel based on FP and AXF, which has promising features as a new covalent biopolymeric material.

摘要

本研究旨在评估新型混合水凝胶中阿魏酸酯化果胶（FP）和阿魏酸酯化阿拉伯木聚糖（AXF）的凝胶化过程，并确定其微观结构特征。以甜菜中的FP和玉米麸皮中的阿拉伯木聚糖为原料，使用漆酶作为交联剂通过氧化偶联使其凝胶化。混合水凝胶的动态振荡流变学显示，60分钟后储能模量最大值为768 Pa。扫描电子显微镜图像表明，混合水凝胶具有不完美蜂窝状的微观结构。混合水凝胶中阿魏酸含量为3.73 mg/g，其中阿魏酸二聚体8-5'含量最高，同时也检测到了三聚体的存在。本研究报道了阿魏酸二聚体的分布和浓度，以及基于FP和AXF的混合水凝胶的流变学和微观结构特性，该混合水凝胶作为一种新型共价生物聚合物材料具有良好的特性。