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  • Hindawi Limited  (2)
  • Li, Yiqiang  (2)
  • 2015-2019  (2)
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  • Hindawi Limited  (2)
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  • 2015-2019  (2)
Year
  • 1
    Online Resource
    Online Resource
    The Preparation of a Highly Stretchable Cellulose Nanowhisker Nanocomposite Hydrogel
    Hindawi Limited ; 2015
    In:  Journal of Nanomaterials Vol. 2015 ( 2015), p. 1-8
    Details
    In: Journal of Nanomaterials, Hindawi Limited, Vol. 2015 ( 2015), p. 1-8
    Abstract: Molecules that associate to form cross-links by hydrophobic association are designed and synthesised. Hydrogels, based on cellulose nanowhiskers (CNWs), acrylamide (AM), and stearyl methacrylate (C18), were synthesised by micellar copolymerisation, using ammonium peroxydisulfate as an initiator. CNWs composite hydrogels were characterised by Fourier transform infrared spectroscopy (FTIR) and their morphologies were investigated by scanning electron microscope (SEM). The system shows the original extensibility up to about 2500%: the tensile strength and compressive strength have maximum values of 1.338 MPa and 2.835 MPa, respectively. Besides excellent mechanical properties, CNWs composite hydrogels also have the ability to self-heal and remould: this is mainly attributed to the dissociation and reassociation of the associated micelles. In contrast to conventional cellulose hydrogels, these systems, when broken or cut, can be simply repaired by bringing together fractured surfaces to self-heal at room temperature.
    Type of Medium: Online Resource
    ISSN: 1687-4110 , 1687-4129
    URL: Article
    DOI: 10.1155/2015/963436
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2015
    detail.hit.zdb_id: 2229480-6
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Binding Cellulose and Chitosan via Intermolecular Inclusion Interaction: Synthesis and Characterisation of Gel
    Hindawi Limited ; 2015
    In:  Journal of Spectroscopy Vol. 2015 ( 2015), p. 1-6
    Details
    In: Journal of Spectroscopy, Hindawi Limited, Vol. 2015 ( 2015), p. 1-6
    Abstract: A novel cellulose-chitosan gel was successfully prepared in three steps: (1) ferrocene- (Fc-) cellulose with degrees of substitution (DS) of 0.5 wt% was synthesised by ferrocenecarboxylic acid and cellulose within dimethylacetamide/lithium chloride (DMAc/LiCl); (2) the β -cyclodextrin ( β -CD) groups were introduced onto the chitosan chains by reacting chitosan with epichlorohydrin in dimethyl sulphoxide and a DS of 0.35 wt%; (3) thus, the cellulose-chitosan gel was obtained via an intermolecular inclusion interaction of Fc-cellulose and β -CD-chitosan in DMA/LiCl, that is, by an intermolecular inclusion interaction, between the Fc groups of cellulose and the β -CD groups on the chitosan backbone at room temperature. The successful synthesis of Fc-cellulose and β -CD-chitosan was characterised by 13 C-NMR spectroscopy. The gel based on β -CD-chitosan and Fc-cellulose was formed under mild conditions which can engender autonomous healing between cut surfaces after 24 hours: the gel cannot self-heal while the cut surfaces were coated with a solution of a competitive guest (adamantane acid). The cellulose-chitosan complex made by this method underwent self-healing. Therefore, this study provided a novel method of expanding the application of chitosan by binding it with another polymer.
    Type of Medium: Online Resource
    ISSN: 2314-4920 , 2314-4939
    URL: Article
    DOI: 10.1155/2015/179258
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2015
    detail.hit.zdb_id: 2068433-2
    SSG: 11
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