Thermal and Rheological Properties of the Mucilage from the Fruit of Cordia lutea

Q2 Materials Science

Polymers from Renewable Resources Pub Date : 2017-08-01 DOI:10.1177/204124791700800301

O. Troncoso, B. Zamora, F. Torres

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引用次数: 6

Abstract

In recent years, natural gums and mucilages have been shown to be useful in the food and pharmacological industries. In this study, the mucilage of the fruit of Cordia lueta has been extracted and characterised in order to explore its potential applications. Thermogravimetric tests were used to measure the water content of this natural mucilage. Differential scanning calorimetry allowed assessing thermal transitions and thermal degradation of the samples. Steady flow rheometry was used to measure the viscosity of the samples as a function of the shear rate. Dynamic oscillatory rheometry was used to study the variation of the storage and loss modulus of the mucilage as function of the oscillatory frequency and stress. The results showed that this mucilage is a polysaccharide network that behaves as a pseudoplastic fluid. Its storage modulus is not completely independent from the oscillation frequency. In addition, the stress sweeps showed that C. lutea mucilage has a reversible stress softening behaviour. The findings reported in the present work suggest that this mucilage can be used as a rheology modifier for commercial foods and biomedical materials.

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木犀果实粘液的热流变特性

近年来，天然树胶和粘液已被证明在食品和制药工业中有用。在本研究中，对蓝堇果实的粘液进行了提取和表征，以探索其潜在的应用。用热重法测定了这种天然粘液的含水量。差示扫描量热法可以评估样品的热转变和热降解。使用稳定流动流变仪来测量样品的粘度作为剪切速率的函数。采用动态振荡流变仪研究了粘液的储能模量和损耗模量随振荡频率和应力的变化。结果表明，这种粘液是一种多糖网络，表现为假塑性流体。其储能模量并不完全与振荡频率无关。此外，应力扫描表明木犀粘液具有可逆的应力软化行为。本工作中报道的发现表明，这种粘液可以用作商业食品和生物医学材料的流变改性剂。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Polymers from Renewable Resources Materials Science-Polymers and Plastics

CiteScore

3.50

自引率

0.00%

发文量

期刊介绍： Polymers from Renewable Resources, launched in 2010, publishes leading peer reviewed research that is focused on the development of renewable polymers and their application in the production of industrial, consumer, and medical products. The progressive decline of fossil resources, together with the ongoing increases in oil prices, has initiated an increase in the search for alternatives based on renewable resources for the production of energy. The prevalence of petroleum and carbon based chemistry for the production of organic chemical goods has generated a variety of initiatives aimed at replacing fossil sources with renewable counterparts. In particular, major efforts are being conducted in polymer science and technology to prepare macromolecular materials based on renewable resources. Also gaining momentum is the utilisation of vegetable biomass either by the separation of its components and their development or after suitable chemical modification. This journal is a valuable addition to academic, research and industrial libraries, research institutions dealing with the use of natural resources and materials science and industrial laboratories concerned with polymer science.