期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 6, 期 8, 页码 9966-9978出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.8b01202
关键词
Cellulose nanocrystals; Lignin nanoparticles; Citric acid; Esterification; Solvent dispersion
资金
- Chinese Scholarship Council (CSC)
This paper proposes one straightforward route for citric acid modification of two different lignocellulosic products, cellulose nanocrystals (CNC) and lignin nanoparticles (LNP). Modified cellulose nanocrystals (MCNC) and lignin nanoparticles (MLNP) were characterized by means of Fourier Transform Infrared Spectroscopy (FT-IR), C-13 and H-1 nuclear magnetic resonance (NMR), scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet visible/near-infrared (UV vis/NIR) spectrometry and thermogravimetric analysis (TGA). The reaction mechanism between citric acid and both CNC and LNP was discussed. The resultant MCNC exhibited improved dispersion in polar solvents, better thermal stability as compared with CNC while, in the case of LNP, a slight increase in thermal stability and alteration of MLNP dispersibility in polar solvents were proved. These results confirmed how esterified (MCNC) and etherified (MLNP) biobased nanoparticles with tuned hydrophilicity, obtained by a treatment with a low cost, sustainable and easily soluble cross-linker, have potential for widespread applicability in the field of polymeric based nanocomposites having different polarity.
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