Hydrophobic cellulose aerogel from waste napkin paper for oil sorption applications

Author:

Sanguanwong Amaret1ORCID,Pavasant Prasert2,Jarunglumlert Teeraya3,Nakagawa Kyuya4,Flood Adrian1,Prommuak Chattip5

Affiliation:

1. School of Energy Science and Engineering , 423058 Vidyasirimedhi Institute of Science and Technology (VISTEC) , Wangchan , Rayong , Thailand

2. Thai Roong Rueng Research and Development Co., Ltd , Bangkok , Thailand

3. Faculty of Science, Energy, and Environment , King Mongkut’s University of Technology North Bangkok (Rayong Campus) , Rayong , Thailand

4. Department of Chemical Engineering, Faculty of Engineering , 12918 Kyoto University , Katsura, Nishikyo-ku , Kyoto , Japan

5. Energy Research Institute , Chulalongkorn University , Bangkok , Thailand

Abstract

Abstract This study is the first, to the best of our knowledge, where waste napkin paper was successfully valorized to low-density (27.2 mg cm−3) cellulose aerogels for oil sorption material. Two simple methods with different gel coagulators, ethanol and sulfuric acid, were used for preparation of the aerogel. Conditions for the alkaline treatment of the raw material and the pre-freezing temperature in the lyophilization process were optimized. It was found that the water and oil sorption capacities of the aerogels were not significantly affected by alkaline treatment, while they could be adjusted by changing the pre-freezing temperature. Although the produced aerogels were initially amphiphilic, hydrophobic surfaces were obtained by vapor deposition of methyltrimethoxysilane (MTMS) and these materials possessed high sorption capacities, up to 32.24 cm3 g−1 (28.56 g g−1) for pump oil and 26.77 cm3 g−1 (39.59 g g−1) for chloroform. This was comparable to aerogels prepared from fresh cellulosic materials via the sol-gel method, as their sorption capacities varied in the range of 14–45 g g−1.

Publisher

Walter de Gruyter GmbH

Subject

General Materials Science,Forestry

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