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Polymers 2018, 10(10), 1168;

Hydrothermal Synthesis of Cellulose Nanocrystal-Grafted-Acrylic Acid Aerogels with Superabsorbent Properties

Key Laboratory of Bio-Based Material Science and Technology of Ministry of Education, Northeast Forestry University, Hexing Road 26, Harbin 150040, China
Post-Doctoral Research Center, Yihua Lifestyle Technology Co., Ltd., Shantou 515834, China
School of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, Hunan, China
Authors to whom correspondence should be addressed.
Received: 12 September 2018 / Revised: 15 October 2018 / Accepted: 17 October 2018 / Published: 19 October 2018
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In this work, we applied a fast and simple method to synthesize cellulose nanocrystal (CNC) aerogels, via a hydrothermal strategy followed by freeze drying. The characteristics and morphology of the obtained CNC-g-AA aerogels were affected by the hydrothermal treatment time, volume of added AA (acrylic acid), and the mass fraction of the CNCs. The formation mechanism of the aerogels involved free radical graft copolymerization of AA and CNCs with the cross-linker N,N′-methylene bis(acrylamide) (MBA) during the hydrothermal process. The swelling ratio of the CNC-g-AA aerogels was as high as 495:1, which is considerably greater than that of other polysaccharide-g-AA aerogels systems. Moreover, the CNC-g-AA aerogels exhibited an excellent methyl blue (MB) adsorption capacity and the ability to undergo rapid desorption/regeneration. The maximum adsorption capacity of the CNC-g-AA aerogels for MB was greater than 400 mg/g. Excellent regeneration performance further indicates the promise of our CNC-g-AA aerogels as an adsorbent for applications in environmental remediation. View Full-Text
Keywords: cellulose nanocrystals; hydrothermal; aerogels; superabsorbent cellulose nanocrystals; hydrothermal; aerogels; superabsorbent

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Liu, X.; Yang, R.; Xu, M.; Ma, C.; Li, W.; Yin, Y.; Huang, Q.; Wu, Y.; Li, J.; Liu, S. Hydrothermal Synthesis of Cellulose Nanocrystal-Grafted-Acrylic Acid Aerogels with Superabsorbent Properties. Polymers 2018, 10, 1168.

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