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Open AccessArticle

Effect of Cellulose Nanocrystals Nanofiller on the Structure and Sorption Properties of Carboxymethyl Cellulose–Glycerol–Cellulose Nanocrystals Nanocomposite Systems

Petru Poni Institute of Macromolecular Chemistry of the Romanian Academy, 700486 Iasi, Romania
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Materials 2020, 13(13), 2900; https://doi.org/10.3390/ma13132900
Received: 30 May 2020 / Revised: 17 June 2020 / Accepted: 24 June 2020 / Published: 28 June 2020
(This article belongs to the Special Issue Polymer Materials from Renewable Resources)
Biobased materials present a great interest due to their properties and biodegradability. Cellulose nanocrystals (CNC) nanofiller, in various amounts, was incorporated into a carboxymethyl cellulose (CMC)–glycerol (G) matrix in order to obtain nanocomposite systems with improved properties. The effect of the nanofiller on the structural features was investigated by Fourier transform infrared (FT-IR) spectroscopy, principal component analysis (PCA), two-dimensional correlation spectroscopy (2D-COS), and X-ray diffraction, while the sorption properties were evaluated by water vapor isotherms using the gravimetric method coupled with infrared spectroscopy. We observed the presence of the interactions taking place between the CMC-G and CNC involving the hydroxyl and carboxylate groups, which decreased the number of water sorption sites. Following this, the moisture content in the nanocomposite films decreased with the increase in the amount of CNC. Moreover, the bands associated to water molecules presented different wavenumber values separated for CMC-G and CNC components. View Full-Text
Keywords: cellulose nanocrystals; carboxymethyl cellulose; structural features; sorption properties; interactions cellulose nanocrystals; carboxymethyl cellulose; structural features; sorption properties; interactions
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Popescu, M.-C.; Dogaru, B.-I.; Popescu, C.-M. Effect of Cellulose Nanocrystals Nanofiller on the Structure and Sorption Properties of Carboxymethyl Cellulose–Glycerol–Cellulose Nanocrystals Nanocomposite Systems. Materials 2020, 13, 2900.

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