Contact
    Start Publications Facile Synthesis of Highly Hydrophobic Cellulose Nanoparticles ...
    ←  Publication Finder
    Attension

    Facile Synthesis of Highly Hydrophobic Cellulose Nanoparticles through Post-Esterification Microfluidization

    Year: 2018

    Journal: Fibers, Volume 6, JUN

    Authors: Lin, Chunxiang; Ma, Qianli; Su, Qiaoquan; Bian, Huiyang; Zhu, J. Y.

    Organizations: Science and Technology Project of Fujian Province Educational Department [JZ160416]; Chinese Scholarship Council (CSC)

    Keywords: esterification; hydrophobic; cellulose nanoparticles; nanofibrils; microfluidization

    A post-esterification with a high degree of substitution (hDS) mechanical treatment (Pe(hDS)M) approach was used for the production of highly hydrophobic cellulose nanoparticles (CNPs). The process has the advantages of substantially reducing the mechanical energy input for the production of CNPs and avoiding CNP aggregation through drying or solvent exchange. A conventional esterification reaction was carried out using a mixture of acetic anhydride, acetic acid, and concentrated sulfuric acid, but at temperatures of 60-85 degrees C. The successful hDS esterification of bleached eucalyptus kraft pulp fibers was confirmed by a variety of techniques, such as Fourier transform infrared (FTIR), solid state C-13 NMR, X-ray photoelectron spectroscopy (XPS), elemental analyses, and X-ray diffraction (XRD). The CNP morphology and size were examined by atomic force microscopy (AFM) as well as dynamic light scattering. The hydrophobicity of the PeM-CNP was confirmed by the redispersion of freeze-dried CNPs into organic solvents and water contact-angle measurements. Finally, the partial conversion of cellulose I to cellulose II through esterification improved PeM-CNP thermal stability.
    View publication