Rheological elucidation of the viscoelastic properties and network interaction of mixed high-methoxyl pectin and kappa-carrageenan gels
Rheological elucidation of the viscoelastic properties and network interaction of mixed high-methoxyl pectin and kappa-carrageenan gels
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高甲氧基果胶和 kappa-卡拉胶混合凝胶的粘弹性和网络相互作用的流变学阐明
DOI：
10.1016/j.foodhyd.2022.107647
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发表时间：
2022
影响因子：
10.7
通讯作者：
Bacabac Rommel G.
中科院分区：
文献类型：
--
作者：
Roque Arlyn M.;Montinola Denxybel;Geonzon Lester;Matsukawa Shingo;Lobarbio Camila Flor Y.;Taboada Evelyn B.;Bacabac Rommel G.
研究了两种阴离子多糖之间的相互作用。以不同体积分数制备了高甲氧基果胶（HMP）和κ-卡拉胶（KC）的混合物。通过线性小振幅振荡剪切（SAOS）和非线性大振幅振荡剪切（LAOS）研究了样品的复杂流变特性和微观结构。纯KC和HMP/KC混合物表现出凝胶状性质，而纯HMP在实验条件下不凝胶化，被表征为粘弹性液体。HMP/KC混合物的温度依赖性流变行为表明KC链的独立聚集。HMP/KC混合物的粘弹性性能，如振荡谱和材料刚度，与纯KC相同，表明KC对最终凝胶有很大影响。HMP/KC混合物在时间扫描过程中的瞬态行为、线性扫描过程中存储模量的单调下降以及应变扫描过程中非线性流变行为的开始表明，混合物中可能存在富HMP和富KC相的分相网络结构。基于线性和非线性的流变学数据，我们提出了HMP/KC混合物中双连续网络结构的可能性，由弱HMP相组成的随机线圈构型和优势KC相组成的双螺旋聚集体。
The interaction between two anionic polysaccharides known for their gelation capability was investigated. Mixtures of high-methoxyl pectin (HMP) and κ-carrageenan (KC) were prepared at different volume fractions. The sample's complex rheological properties and microstructures were investigated by performing linear small amplitude oscillatory shear (SAOS) and nonlinear large amplitude oscillatory shear (LAOS). Pure KC and the HMP/KC mixtures exhibited gel-like properties, whereas pure HMP did not gel at the experimental conditions employed and was characterized as a viscoelastic liquid. Temperature-dependent rheological behavior of HMP/KC mixtures suggested the independent aggregation of KC chains. The viscoelastic properties of the HMP/KC mixtures, such as oscillatory spectrum, and material stiffness, followed that of pure KC, indicating that KC strongly influenced the final gel. The transient behavior of the HMP/KC mixtures in the time sweep and the monotonic decrease of the storage modulus in the linear regime, and the onset of nonlinear rheological behavior in the strain sweep measurements suggested the possibility of the phase-separated network structure of in HMP-rich and KC-rich phases in the mixtures. Based on the rheological data both in the linear and nonlinear regimes, we propose the possibility of a bicontinuous network structure in HMP/KC mixtures, composed of the weak HMP phase in random coil configuration and the dominant KC phase in double helix aggregates.
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影响因子：
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作者：
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DOI：
10.1039/c29690000701
发表时间：
1969
期刊：
Journal of The Chemical Society D: Chemical Communications
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DOI：
--
发表时间：
1998
期刊：
影响因子：
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作者：
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影响因子：
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作者：
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影响因子：
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作者：
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