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Fabrication and characterization of polysaccharide ion gels with ionic liquids and their further conversion into value-added sustainable materials.

Takada A, Kadokawa J - Biomolecules (2015)

Bottom Line: The resulting ion gels have been characterized by suitable analytical measurements.Characterization of a pregel state by viscoelastic measurement provided the molecular weight information.Furthermore, the polysaccharide ion gels have been converted into value-added sustainable materials by appropriate procedures, such as exchange with other disperse media and regeneration.

View Article: PubMed Central - PubMed

Affiliation: Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga Koen 6-1, Kasuga, Fukuoka 816-8581, Japan. takada@mm.kyushu-u.ac.jp.

ABSTRACT
A review of the fabrication of polysaccharide ion gels with ionic liquids is presented. From various polysaccharides, the corresponding ion gels were fabricated through the dissolution with ionic liquids. As ionic liquids, in the most cases, 1-butyl-3-methylimidazolium chloride has been used, whereas 1-allyl-3methylimidazolium acetate was specifically used for chitin. The resulting ion gels have been characterized by suitable analytical measurements. Characterization of a pregel state by viscoelastic measurement provided the molecular weight information. Furthermore, the polysaccharide ion gels have been converted into value-added sustainable materials by appropriate procedures, such as exchange with other disperse media and regeneration.

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Procedures for fabrication of self-assembled chitin nanofiber dispersion and film, and their SEM images.
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biomolecules-05-00244-f008: Procedures for fabrication of self-assembled chitin nanofiber dispersion and film, and their SEM images.

Mentions: When the chitin ion gels with AMIMBr (9.1–10.7 wt%) were soaked in methanol at room temperature for 24 h to slowly regenerate chitin, followed by sonication, dispersions were produced (Figure 8) [40,41]. The SEM image of a spin-coated sample obtained by dilution of the dispersion showed the nanofiber morphology with ca. 20–60 nm in width and several hundred nm in length, indicating the self-assembled formation of chitin nanofibers by the regenerative bottom-up approach from the ion gel. The isolation of the chitin nanofibers from the dispersion by filtration gave a film (Figure 8). The SEM image of the film exhibited a surface morphology of highly entangled nanofibers. Such entangled structure from the nanofibers probably contributed to the formability of the film.


Fabrication and characterization of polysaccharide ion gels with ionic liquids and their further conversion into value-added sustainable materials.

Takada A, Kadokawa J - Biomolecules (2015)

Procedures for fabrication of self-assembled chitin nanofiber dispersion and film, and their SEM images.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4384121&req=5

biomolecules-05-00244-f008: Procedures for fabrication of self-assembled chitin nanofiber dispersion and film, and their SEM images.
Mentions: When the chitin ion gels with AMIMBr (9.1–10.7 wt%) were soaked in methanol at room temperature for 24 h to slowly regenerate chitin, followed by sonication, dispersions were produced (Figure 8) [40,41]. The SEM image of a spin-coated sample obtained by dilution of the dispersion showed the nanofiber morphology with ca. 20–60 nm in width and several hundred nm in length, indicating the self-assembled formation of chitin nanofibers by the regenerative bottom-up approach from the ion gel. The isolation of the chitin nanofibers from the dispersion by filtration gave a film (Figure 8). The SEM image of the film exhibited a surface morphology of highly entangled nanofibers. Such entangled structure from the nanofibers probably contributed to the formability of the film.

Bottom Line: The resulting ion gels have been characterized by suitable analytical measurements.Characterization of a pregel state by viscoelastic measurement provided the molecular weight information.Furthermore, the polysaccharide ion gels have been converted into value-added sustainable materials by appropriate procedures, such as exchange with other disperse media and regeneration.

View Article: PubMed Central - PubMed

Affiliation: Institute for Materials Chemistry and Engineering, Kyushu University, Kasuga Koen 6-1, Kasuga, Fukuoka 816-8581, Japan. takada@mm.kyushu-u.ac.jp.

ABSTRACT
A review of the fabrication of polysaccharide ion gels with ionic liquids is presented. From various polysaccharides, the corresponding ion gels were fabricated through the dissolution with ionic liquids. As ionic liquids, in the most cases, 1-butyl-3-methylimidazolium chloride has been used, whereas 1-allyl-3methylimidazolium acetate was specifically used for chitin. The resulting ion gels have been characterized by suitable analytical measurements. Characterization of a pregel state by viscoelastic measurement provided the molecular weight information. Furthermore, the polysaccharide ion gels have been converted into value-added sustainable materials by appropriate procedures, such as exchange with other disperse media and regeneration.

Show MeSH