Journal
BIOMACROMOLECULES
Volume 18, Issue 12, Pages 4196-4205Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.biomac.7b01224
Keywords
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Funding
- Funding Program for Next Generation World-Leading Researchers (NEXT Program)
- Japan Society for the Promotion of Science [26288056, 26620174, 16K14075]
- JX Nippon Oil and Energy Corporation
- Grants-in-Aid for Scientific Research [26288056, 26620174, 16K14075] Funding Source: KAKEN
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Extracted nanocellulose from natural resources commonly requires modification before it is used as an effective nanofiller. In the present study, through an enzymatic polymerization of alpha-D-glucose 1-phosphate from the primer 2(glucosyloxy)ethyl methacrylate (GEMA), a novel type of two-dimensional methacrylate-containing cellulose nanosheets (CNS) with a thickness of about 6 nm, named as GEMA-CNS, was directly synthesized under a mild condition by a bottom-up method. The structure and morphology of GEMA-CNS were characterized by H-1-nuclear magnetic resonance (NMR), matrix-assisted laser desorption/ionization time-of-flight mass spectra (MALDI-TOF MS), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). Afterward, the obtained GEMA-CNS was covalently incorporated into poly(ethylene glycol) matrix through thiol ene Michael addition, fabricating a series of GEMA-CNS-based nanocomposite hydrogels. The addition of GEMA-CNS effectively improved the mechanical strength and altered the internal network structures of hydrogels; additionally, the swelling/biodegradation behaviors of gels in phosphate buffer saline (pH 7.4) at 37 degrees C were affected to some degree. This species of property-tunable hydrogels with GEMA-CNS dosage demonstrates potential applications in tissue engineering. The current presentation opens a new road for direct enzymatic preparation of reactive nanocellulose and its novel applications in nanocomposite materials.
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