Dissolution of Biopolymers Using Ionic Liquids

Mantz, Robert A.; Fox, Douglas M.; Green, J. Marshall; Fylstra, Paul; Long, Hugh C. De; Trulove, Paul C.

doi:10.1515/zna-2007-5-608

Cited by 56 publications

(47 citation statements)

References 13 publications

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“…Dissolution of biopolymers, cellulose, [37][38][39] and silk fibroin, [40][41][42][43] in ILs is another interesting topic. Chloride anion-based ILs dissolve cellulose more than other IL systems because chloride anions with strong hydrogen-bonding basicity can readily interact with the hydroxyl groups on cellulose.…”

Section: Advanced Functional Solventmentioning

confidence: 99%

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New Frontiers in Materials Science Opened by Ionic Liquids

et al. 2010

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Ionic liquids (ILs) including ambient-temperature molten salts, which exist in the liquid state even at room temperature, have a long research history. However, their applications were once limited because ILs were considered as highly moisture-sensitive solvents that should be handled in a glove box. After the first synthesis of moisture-stable ILs in 1992, their unique physicochemical properties became known in all scientific fields. ILs are composed solely of ions and exhibit several specific liquid-like properties, e.g., some ILs enable dissolution of insoluble bio-related materials and the use as tailor-made lubricants in industrial applications under extreme physicochemical conditions. Hybridization of ILs and other materials provides quasi-solid materials, which can be used to fabricate highly functional devices. ILs are also used as reaction media for electrochemical and chemical synthesis of nanomaterials. In addition, the negligible vapor pressure of ILs allows the fabrication of electrochemical devices that are operated under ambient conditions, and many liquid-vacuum technologies, such as X-ray photoelectron spectroscopy (XPS) analysis of liquids, electron microscopy of liquids, and sputtering and physical vapor deposition onto liquids. In this article, we review recent studies on ILs that are employed as functional advanced materials, advanced mediums for materials production, and components for preparing highly functional materials.

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Section: Advanced Functional Solventmentioning

confidence: 99%

“…[41] Mantz et al have recently found that ILs with amino-acid-based anions can dissolve silk fibroin in the ILs, like Cl À -based ILs. [43] …”

Section: Advanced Functional Solventmentioning

confidence: 99%

New Frontiers in Materials Science Opened by Ionic Liquids

et al. 2010

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“…Previous studies have demonstrated processing methods involving the dissolution of biopolymers such as cellulose, silk, chitin, and chitosan. [1][2][3][4][5][6][7][8][9] Unfortunately, the reconstitution process of the dissolved biopolymers often fails to regenerate the original ''native'' structure, and this frequently leads to significant degradation of the physical and chemical properties of the resulting natural material. [10][11][12] In this paper, a process we term ''natural fiber welding'' is described.…”

Section: Introductionmentioning

confidence: 99%

Natural Fiber Welding

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et al. 2010

Macro Materials & Eng

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A process we term “natural fiber welding” is demonstrated by which loose fibers are transformed to create a congealed network using an IL solvent. Several examples are discussed that include cellulosic and protein‐based materials. SEM shows the fusion of fibers upon treatment. XRD and FT‐IR spectroscopy of cellulosic materials show that significant amounts of the native polymer structure are retained after the process is completed. Data suggest that material at the fiber exterior is preferentially transformed while material in the fiber core is left in the native state. Data also demonstrate that the amount of material modified can be tailored by control of variables such as the IL solvent concentration, the process temperature, and the processing time.

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“…As the recent result in the course of the work, we reported the formation of the gel from a solution of cellulose in 1 [10,11], which was obtained by keeping a solution at room temperature for several days. On the other hand, little has been reported regarding the dissolution of chitin with ionic liquids [12][13][14]. Although Xie et al reported that 1 dissolved chitin in 10 wt%, the complicated and strict purification procedure of 1 was necessarily carried out prior to use for the dissolution experiment [12].…”

Section: Introductionmentioning

confidence: 99%