磁场在生物聚合物复合材料中诱导的微结构图案化：流变特性与原位光学观测之间的相关性

IF 2.3 3区工程技术 Q2 MECHANICS

Rheologica Acta Pub Date : 2025-04-05 DOI:10.1007/s00397-025-01487-x

Alberto Varela-Feijoo, Williams Brett, Souad Ammar-Merah, Alain Ponton

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引用次数: 0

摘要

本文报道了新型磁敏生物聚合物复合材料的发展及其流变特性在微观结构原位光学研究中的后续研究。带正电的氧化铁磁性纳米颗粒（IONP）通过在其表面接枝3-氨基丙基膦酸分子进行化学功能化，将其混合在海藻酸钠链的纠缠水溶液中。然后使用自制的磁光流变装置对所得纳米复合材料进行稳态剪切流动和粘弹性测量。低剪切粘度和线性粘弹性模量随磁场强度的增大而增大。这可以用IONP和聚合物链表面的-NH3+和-COO -基团之间的静电相互作用来解释。由此产生的微观结构取决于剪切速率和磁场振幅，这是第一次使用原位光学显微镜观察并深入分析。图形抽象

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Microstructure patterning induced by magnetic field in biopolymer composites: correlation between rheological properties and in situ optical observation

This paper reports the development of innovative magnetic-sensitive biopolymer composites and the subsequent investigation of their rheological properties in relation to in situ optical studies of microstructures. Positively charged iron oxide magnetic nanoparticles (IONP) that had been chemically functionalised by grafting 3-Aminopropylphosphonic acid molecules onto their surfaces were mixed in an entangled aqueous solution of sodium alginate chains. Steady shear flow and viscoelastic measurements were then performed on the resulting nanocomposites using a home-made magneto-opto-rheological device. The increase of low shear viscosity and the linear viscoelastic moduli as the magnitude of the magnetic field increased was clearly demonstrated. This is explained by electrostatic interactions between -NH₃⁺ and -COO⁻ groups at the surface of IONP and polymer chains, respectively. The resulting microstructure, which depends on both the shear rate and the magnetic field amplitude, was observed for the first time using in situ optical microscopy and deeply analysed.

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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."