Dissolution Behavior of Chitin in Ionic Liquids

Wang, Wentao; Zhu, Jiang; Wang, Xiuli; Huang, Yan; Wang, Yu‐Zhong

doi:10.1080/00222341003595634

Cited by 134 publications

(69 citation statements)

References 46 publications

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“…[15][16][17][18][19][20][21] ILs as cellulose dissolving solvents have been critically reviewed in Tom Welton's research group very recently. 22 Apart from cellulosic materials, the dissolution/regeneration of chitin/CH or AG has also been carried out in ILs, and useful materials have been prepared from these polysaccharides [23][24][25][26][27][28][29][30][31] (Note: there are many other biomaterials which have been treated with ILs but not referred to here as the present study intends to focus on AG and CH). In view of the ease of their processing in ILs, the preparation of advanced functional biopolymer composites of chitin/CH with cellulose, carbon nanotubes, or silk for different applications, such as biodegradable biosorbents, films, membranes, fibers, actuators, and composite hydrogels for cell adhesion and growth has been reported using IL technology.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of agarose–chitosan hybrid materials and nanocomposite ionogels using an ionic liquid via dissolution, regeneration and sol–gel transition

2014

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We report simultaneous dissolution of agarose (AG) and chitosan (CH) in varying proportions in an ionic liquid (IL), 1-butyl-3-methylimidazolium chloride [C 4 mim] [Cl]. Composite materials were constructed from AG-CH-IL solutions using the antisolvent methanol, and IL was recovered from the solutions. Composite materials could be uniformly decorated with silver oxide (Ag 2 O) nanoparticles (Ag NPs) to form nanocomposites in a single step by in situ synthesis of Ag NPs in AG-CH-IL sols, wherein the biopolymer moiety acted as both reducing and stabilizing agent. Cooling of Ag NPs-AG-CH-IL sols to room temperature resulted in high conductivity and high mechanical strength nanocomposite ionogels. The structure, stability and physiochemical properties of composite materials and nanocomposites were characterized by several analytical techniques, such as Fourier transform infrared (FTIR), CD spectroscopy, differential scanning colorimetric (DSC), thermogravimetric analysis (TGA), gel permeation chromatography (GPC), and scanning electron micrography (SEM). The result shows that composite materials have good thermal and conformational stability, compatibility and strong hydrogen bonding interactions between AG-CH complexes. Decoration of Ag NPs in composites and ionogels was confirmed by UV-Vis spectroscopy, SEM, TEM, EDAX and XRD. The mechanical and conducting properties of composite ionogels have been characterized by rheology and current-voltage measurements. Since Ag NPs show good antimicrobial activity, Ag NPs -AG-CH composite materials have the potential to be used in biotechnology and biomedical applications whereas nanocomposite ionogels will be suitable as precursors for applications such as quasi-solid dye sensitized solar cells, actuators, sensors or electrochromic displays.

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Section: Introductionmentioning

confidence: 99%

Facile preparation of agarose–chitosan hybrid materials and nanocomposite ionogels using an ionic liquid via dissolution, regeneration and sol–gel transition

2014

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“…A study on the dissolving behaviour of chitins with different physicochemical characteristics in series of ILs indicated that the dissolution behaviour of chitin in ILs was affected by the degree of deactylation (DD), the crystallinity, and the MW of chitin, as well as the nature of the anion of the IL (Wang et al 2010b). …”

Section: Extraction Processes Of Chitinmentioning

confidence: 99%

Biological Effects and Extraction Processes Used to Obtain Marine Chitosan

Montilla

Ruiz‐Matute

Corzo

2013

Bioactive Compounds From Marine Foods

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“…The dissolution of chitin in ILs was successfully achieved, and the mechanism was considered to be similar to the dissolution of cellulose in IL media. 317,318 Among several examined ILs, [emim][OAc]…”

Section: Green Chemistrymentioning

confidence: 99%