Fluorine-based surface decorated cellulose nanocrystals as potential hydrophobic and oleophobic materials
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  • 作者:Abdus Salam (1) (2) (3)
    Lucian A. Lucia (1) (2) (3)
    Hasan Jameel (1)
  • 关键词:Cellulose nanocrystals ; Polyfluorination ; Dispersibility ; Hydrophobicity ; Oleophobicity
  • 刊名:Cellulose
  • 出版年:2015
  • 出版时间:February 2015
  • 年:2015
  • 卷:22
  • 期:1
  • 页码:397-406
  • 全文大小:785 KB
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  • 作者单位:Abdus Salam (1) (2) (3)
    Lucian A. Lucia (1) (2) (3)
    Hasan Jameel (1)

    1. Department of Forest Biomaterials (Wood & Paper Science), North Carolina State University, Raleigh, NC, 27695-8005, USA
    2. Key Laboratory of Pulp & Paper Science and Technology of the Ministry of Education, Qilu University of Technology, Jinan, Shandong Province, 250353, People鈥檚 Republic of China
    3. Department of Chemistry, North Carolina State University, Raleigh, NC, 27695-8204, USA
  • 刊物类别:Chemistry and Materials Science
  • 刊物主题:Chemistry
    Bioorganic Chemistry
    Physical Chemistry
    Organic Chemistry
    Polymer Sciences
  • 出版者:Springer Netherlands
  • ISSN:1572-882X
文摘
The objective of this research is to provide the first account of a simple preparation of surface fluorinated bulk cellulose nanocrystals and a characterization of their physical and chemical properties. The surface fluorinated, or polyfluorinated cellulose nanocrystals were first generated by reacting bulk cellulose with hydrochloric acid in an aqueous medium to yield cellulose nanocrystals that were subsequently purified and reacted with pentafluorobenzoyl chloride in presence of pyridine. The degree of substitution (out of a possible 3.0 hydroxyl groups/anhydroglucopyranose residue) of the polyfluorinated cellulose nanocrystals was 0.77. It was found that the dispersion of cellulose nanocrystals within an organic solvent was significantly improved following surface fluorination. Dynamic contact angle, FT-IR, NMR, TGA, DSC, XRD and XPS were used to confirm the fluorinated character of the reactant products. The polyfluorinated cellulose nanocrystals obtained and characterized demonstrated excellent hydrophobic and oleophobic properties to establish themselves as viable candidates in the consideration of a non-traditional and highly attractive conceptual paradigm for their inclusion as a nanofiller in a variety of low surface energy applications.

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