{"title":"Rheological Behavior of Polysaccharide Hydrogels of Alginate Reinforced by a Small Amount of Halloysite Nanotubes for Extrusion 3D Printing","authors":"V. S. Molchanov, S. A. Glukhova, O. E. Philippova","doi":"10.3103/s0096392523700268","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The rheological properties of hydrogels of a natural polysaccharide sodium alginate and small amount of clay nanotubes of halloysite were investigated. Changes of rheological properties during the transition from a semidiluted polymer solution to a hydrogel upon cross-linking by calcium ions were shown. In the gel state, the samples have a yield stress, and their viscosity decreases with the shear rate, but the properties are quickly recovered after the load removal. It was discovered that the addition of up to 0.3 vol % nanotubes of natural clay halloysite leads to an increase by several times of a storage modulus and a yield stress of the hydrogels. At the same time, the practically important properties of shear thinning and the rapid recovery of properties after the load removing make the nanocomposite hydrogels of alginate and halloysite nanotubes promising for use as ink for extrusion 3D printing.</p>","PeriodicalId":19004,"journal":{"name":"Moscow University Biological Sciences Bulletin","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2024-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Moscow University Biological Sciences Bulletin","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.3103/s0096392523700268","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Agricultural and Biological Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
The rheological properties of hydrogels of a natural polysaccharide sodium alginate and small amount of clay nanotubes of halloysite were investigated. Changes of rheological properties during the transition from a semidiluted polymer solution to a hydrogel upon cross-linking by calcium ions were shown. In the gel state, the samples have a yield stress, and their viscosity decreases with the shear rate, but the properties are quickly recovered after the load removal. It was discovered that the addition of up to 0.3 vol % nanotubes of natural clay halloysite leads to an increase by several times of a storage modulus and a yield stress of the hydrogels. At the same time, the practically important properties of shear thinning and the rapid recovery of properties after the load removing make the nanocomposite hydrogels of alginate and halloysite nanotubes promising for use as ink for extrusion 3D printing.
期刊介绍：
Moscow University Biological Sciences Bulletin is forum for research in all important areas of modern biology. It publishes original work on qualitative, analytical and experimental aspects of research. The scope of articles to be considered includes plant biology, zoology, ecology, evolutionary biology, biophysics, genetics, genomics, proteomics, molecular biology, cell biology, biochemistry, endocrinology, immunology, physiology, pharmacology, neuroscience, gerontology, developmental biology, bioinformatics, bioengineering, virology, and microbiology.
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