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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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Physical and chemical approaches for fabrication of composite materials of chitin with another polymeric component.
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biomolecules-05-00244-f009: Physical and chemical approaches for fabrication of composite materials of chitin with another polymeric component.

Mentions: As one of the possible applications of self-assembled chitin nanofibers, attempts have been made to fabricate composite materials with other polymeric components. Two kinds of processes, that is, physical and chemical approaches, have been conducted to fabricate composite materials from the nanofibers. In the former case, nanofibers and polymeric components are physically interacted to construct composites, whereas the latter approach exploits covalent linkages between nanofibers and polymers, leading to compatibility (Figure 9). In general, the latter approach requires the more complicated procedure, including appropriate chemical reactions, than the former approach. By the physical approach, poly(vinyl alcohol) and carboxymethyl cellulose have been compatibilized with self-assembled chitin nanofibers by means of co-regeneration and electrostatic interaction, respectively, to obtain composite films [40,42]. By the chemical approach, surface-initiated ring-opening (co)polymerizations of cyclic monomers from self-assembled chitin nanofiber films with the appropriate initiating groups have been conducted to fabricate composite films covalently grafting polyester and polypeptide chains on the nanofibers [43,44]. Surface-initiated atom-transfer radical polymerization (ATRP) of an acrylate monomer from the self-assembled chitin nanofiber film, which carried initiating groups for ATRP, was also conducted to give composite films [45].


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)

Physical and chemical approaches for fabrication of composite materials of chitin with another polymeric component.
© Copyright Policy
Related In: Results  -  Collection

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

biomolecules-05-00244-f009: Physical and chemical approaches for fabrication of composite materials of chitin with another polymeric component.
Mentions: As one of the possible applications of self-assembled chitin nanofibers, attempts have been made to fabricate composite materials with other polymeric components. Two kinds of processes, that is, physical and chemical approaches, have been conducted to fabricate composite materials from the nanofibers. In the former case, nanofibers and polymeric components are physically interacted to construct composites, whereas the latter approach exploits covalent linkages between nanofibers and polymers, leading to compatibility (Figure 9). In general, the latter approach requires the more complicated procedure, including appropriate chemical reactions, than the former approach. By the physical approach, poly(vinyl alcohol) and carboxymethyl cellulose have been compatibilized with self-assembled chitin nanofibers by means of co-regeneration and electrostatic interaction, respectively, to obtain composite films [40,42]. By the chemical approach, surface-initiated ring-opening (co)polymerizations of cyclic monomers from self-assembled chitin nanofiber films with the appropriate initiating groups have been conducted to fabricate composite films covalently grafting polyester and polypeptide chains on the nanofibers [43,44]. Surface-initiated atom-transfer radical polymerization (ATRP) of an acrylate monomer from the self-assembled chitin nanofiber film, which carried initiating groups for ATRP, was also conducted to give composite films [45].

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