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Gels
Special Issues
Stimuli-Responsive Composite Gels
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Stimuli-Responsive Composite Gels

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Processing and Engineering".

Deadline for manuscript submissions: 15 May 2024 | Viewed by 246

Special Issue Editor

Dr. Tetsu Mitsumata

E-Mail Website
Guest Editor
Department of Materials Science & Technology, Faculty of Engineering, Niigata University, Niigata 950-2181, Japan
Interests: stimuli-responsive soft materials; composite gel; magnetic responsive soft materials; biopolymers; polysaccharide
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue of “Stimuli-Responsive Composite Gels” focuses on recent advances in theoretical and fundamental aspects of the synthesis, characterization, material properties, and applications of a wide range of composite gels, including not only polymer gels containing inorganic substances, but also polymer–polymer composite gels with stimuli-responsive properties. The physicochemical properties of stimuli-responsive composite gels dramatically change in response to the external stimuli such as temperature, pH, solvent composition, physical fields, or electromagnetic waves, and they have attracted considerable attention in the past few decades. Recently, stimuli-responsive composite gels have been used in industrial products, demonstrating excellent responses to stimuli. This Special Issue welcomes submissions based on gel science and technology, from the fundamentals to applications close to practical products.

Dr. Tetsu Mitsumata
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Gels is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • stimuli-responsive property
  • composite gels
  • composite rubbers
  • composite elastomers

Published Papers (1 paper)

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Research

12 pages, 4463 KiB  
Article
Structural Analyses of Polysaccharides Extracted from Cyanobacterial Extracellular Gels and Oriented Liquid Crystalline Microfiber Processing by Poly(vinyl alcohol)-Assisted Electrospinning
by Chizu Mitani, Maiko Okajima, Tomomi Ohashira, Mohammad Asif Ali, Toshiaki Taniike and Tatsuo Kaneko
Gels 2024, 10(5), 321; https://doi.org/10.3390/gels10050321 (registering DOI) - 07 May 2024
Abstract
Sacran is a supergiant cyanobacterial polysaccharide that forms mesogenic supercoil rods that exhibit liquid crystalline (LC) gels at deficient concentrations of around 0.5 wt%, and has several bioactive stimuli-responsive functions. Here, we attempted to form oriented microfibers of sacran by electrospinning, following structural [...] Read more.
Sacran is a supergiant cyanobacterial polysaccharide that forms mesogenic supercoil rods that exhibit liquid crystalline (LC) gels at deficient concentrations of around 0.5 wt%, and has several bioactive stimuli-responsive functions. Here, we attempted to form oriented microfibers of sacran by electrospinning, following structural analyses of the sacran rods. A heterogeneous acid-hydrolysis method using a protonated cation-exchange resin was adopted to examine the short-time exposition of concentrated acid to sacran rods. From the supernatant, the oligomeric fraction that was soluble in water and methanol was isolated. The oligomeric fraction had a main sugar ratio of α-Glc:β-Glc:α-Xyl:β-Xyl:α-Rha of 2:5:1.5:1.5:4 (Glc:Xyl:Rha = 7 (=4 + 3):3:4), and it was speculated that the sacran structure includes rhamnoglucan and xyloglucan (4:3), which are generally rigid enough to exhibit LC. To make oriented microfibers of LC sacran, solubility testing was performed on sacran to find good new solvents of polyhydroxy alcohols such as ethylene glycol, 1,2-propanediol, and glycerol. The oriented film was prepared from a sacran aqueous solution where calcium compound particles deposited on the film are different from polyhydroxy alcohol solutions. Although sacran could not form microfibers by itself, polymer composite microfibers of sacran with poly(vinyl alcohol) were prepared by electrospinning. Cross-polarizing microscopy revealed the molecular orientation of the microfibers. Full article
(This article belongs to the Special Issue Stimuli-Responsive Composite Gels)
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