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Polymers 2019, 11(3), 415;

Effects of Sodium Montmorillonite on the Preparation and Properties of Cellulose Aerogels

School of Materials and Mechanical Engineering, Beijing Technology& Business University, Beijing 100048, China
Beijing Key Laboratory of Quality Evaluation Technology for Hygiene and Safety of Plastics, Beijing Technology and Business University, Beijing 100048, China
Center for Degradable and Flame-Retardant Polymeric Materials, College of Chemistry, Sichuan University, Chengdu 610064, China
Authors to whom correspondence should be addressed.
Received: 28 December 2018 / Revised: 17 February 2019 / Accepted: 20 February 2019 / Published: 4 March 2019
(This article belongs to the Special Issue Polymer and Composite Aerogels)
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In this study, first, a green and efficient NaOH/urea aqueous solution system was used to dissolve cellulose. Second, the resulting solution was mixed with sodium montmorillonite. Third, a cellulose/montmorillonite aerogel with a three-dimensional porous structure was prepared via a sol-gel process, solvent exchange and freeze-drying. The viscoelastic analysis results showed that the addition of montmorillonite accelerated the sol-gel process in the cellulose solution. During this process, montmorillonite adhered to the cellulose substrate surface via hydrogen bonding and then became embedded in the pore structure of the cellulose aerogel. As a result, the pore diameter of the aerogel decreased and the specific surface area of the aerogel increased. Furthermore, the addition of montmorillonite increased the compressive modulus and density of the cellulose aerogel and reduced volume shrinkage during the preparation process. In addition, the oil/water adsorption capacities of cellulose aerogels and cellulose/montmorillon aerogels were investigated. View Full-Text
Keywords: cellulose; montmorillonite; composite aerogel cellulose; montmorillonite; composite aerogel

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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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Long, L.-Y.; Li, F.-F.; Weng, Y.-X.; Wang, Y.-Z. Effects of Sodium Montmorillonite on the Preparation and Properties of Cellulose Aerogels. Polymers 2019, 11, 415.

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