羧甲基纤维素溶液对拉脱石分散体流变性能的影响

IF 2.3 3区工程技术 Q2 MECHANICS

Rheologica Acta Pub Date : 2023-06-15 DOI:10.1007/s00397-023-01401-3

Ingri Julieth Mancilla Corzo, Jéssica Heline Lopes da Fonsêca, Marcos Akira d’Ávila

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引用次数: 1

摘要

流变分析是研究高分子溶液、胶体和水凝胶等广泛应用于生物医学领域的材料结构特性的重要工具。在这项工作中，我们研究了由羧甲基纤维素(CMC)和拉脱石组成的胶体体系的流变性能，这两种材料都是生物相容性材料。静电相互作用和拉脱石硅醇(Si-O)基团与CMC羟基(-OH)之间的氢键影响了CMC/拉脱石水性分散体的流变性能。研究发现，CMC浓度对拉脱石流变行为的影响很大，形成了弱凝胶或强凝胶。加入CMC增强了混合网络，增加了储存\(\left({G}^{^{\prime}}\right)\)和损失\(\left(G''\right)\)模量，以及粘度。在剪切应力作用下，CMC/拉脱土凝胶由于结构重排而表现出强烈的剪切变薄和触变性。此外，时间扫描试验表明，加入CMC可以抑制拉脱石的老化。图形摘要

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Influence of carboxymethyl cellulose solutions on rheological properties of Laponite dispersions

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Influence of carboxymethyl cellulose solutions on rheological properties of Laponite dispersions

Rheological analysis is an important tool to investigate the structural characteristics of materials widely used in the biomedical field, such as polymer solutions, colloids, and hydrogels. In this work, we studied the rheological properties of a colloidal system composed of carboxymethyl cellulose (CMC) and Laponite, both biocompatible materials. Rheological properties of CMC/Laponite aqueous dispersions are influenced by electrostatic interactions and hydrogen bonds between the silanol (Si–O) groups of Laponite and hydroxyl (-OH) of CMC. It was found that the effect of Laponite rheological behavior is strongly affected by CMC concentration, resulting in weak or strong gels. Adding CMC reinforces the blended network, increasing the storage \(\left({G}^{^{\prime}}\right)\) and loss \(\left(G''\right)\) moduli, as well as viscosity. CMC/Laponite gels presented strong shear-thinning and thixotropy due to structural rearrangements when subjected to shear stresses. Moreover, time sweep tests revealed that adding CMC inhibited Laponite aging.

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来源期刊

Rheologica Acta 物理-力学

CiteScore

4.60

自引率

8.70%

发文量

审稿时长

3 months

期刊介绍： "Rheologica Acta is the official journal of The European Society of Rheology. The aim of the journal is to advance the science of rheology, by publishing high quality peer reviewed articles, invited reviews and peer reviewed short communications. The Scope of Rheologica Acta includes: - Advances in rheometrical and rheo-physical techniques, rheo-optics, microrheology - Rheology of soft matter systems, including polymer melts and solutions, colloidal dispersions, cement, ceramics, glasses, gels, emulsions, surfactant systems, liquid crystals, biomaterials and food. - Rheology of Solids, chemo-rheology - Electro and magnetorheology - Theory of rheology - Non-Newtonian fluid mechanics, complex fluids in microfluidic devices and flow instabilities - Interfacial rheology Rheologica Acta aims to publish papers which represent a substantial advance in the field, mere data reports or incremental work will not be considered. Priority will be given to papers that are methodological in nature and are beneficial to a wide range of material classes. It should also be noted that the list of topics given above is meant to be representative, not exhaustive. The editors welcome feedback on the journal and suggestions for reviews and comments."