Obtaining Hydrophobic Aerogels of Unbleached Cellulose Nanofibers of the Species Eucalyptus sp. and Pinus elliottii
The use of natural fibers from renewable and biodegradable sources in oleophilic sorbents, such as cellulose, has become an interesting alternative due to their excellent properties and sustainability. In addition to that, the low density of the aerogels obtained from cellulose is favorable for thei...
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| Veröffentlicht in: | Journal of nanomaterials 2018-01, Vol.2018 (2018), p.1-11 |
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| creator | Baldasso, Camila Galiotto, Deise Lazzari, Lídia Kunz Lavoratti, Alessandra Zanini, Márcia Zattera, Ademir José |
| description | The use of natural fibers from renewable and biodegradable sources in oleophilic sorbents, such as cellulose, has become an interesting alternative due to their excellent properties and sustainability. In addition to that, the low density of the aerogels obtained from cellulose is favorable for their use as sorbents. In this context, the objective of this study is to develop hydrophobic aerogels of unbleached cellulose nanofibers of the Eucalyptus sp. and Pinus elliottii. Cellulose samples were submitted to mechanical fibrillation to obtain cellulose nanofiber suspensions, followed by a chemical treatment with methyltrimethoxysilane and dried by freeze-drying to prepare the aerogels. The aerogels presented hydrophobic and oleophilic characteristics, including a water contact angle of 134°, sorption capacities in a heterogeneous medium of above 21.0 g·g−1, and oil removal efficiency greater than 88.5%. The Pinus elliottii nanofiber aerogels showed higher compressive strength when compared to the nanofiber aerogels of Eucalyptus sp. |
| doi_str_mv | 10.1155/2018/4646197 |
| format | Article |
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In addition to that, the low density of the aerogels obtained from cellulose is favorable for their use as sorbents. In this context, the objective of this study is to develop hydrophobic aerogels of unbleached cellulose nanofibers of the Eucalyptus sp. and Pinus elliottii. Cellulose samples were submitted to mechanical fibrillation to obtain cellulose nanofiber suspensions, followed by a chemical treatment with methyltrimethoxysilane and dried by freeze-drying to prepare the aerogels. The aerogels presented hydrophobic and oleophilic characteristics, including a water contact angle of 134°, sorption capacities in a heterogeneous medium of above 21.0 g·g−1, and oil removal efficiency greater than 88.5%. The Pinus elliottii nanofiber aerogels showed higher compressive strength when compared to the nanofiber aerogels of Eucalyptus sp.</description><identifier>ISSN: 1687-4110</identifier><identifier>EISSN: 1687-4129</identifier><identifier>DOI: 10.1155/2018/4646197</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Aerogels ; Biodegradability ; Carbohydrates ; Caustic soda ; Cellulose ; Cellulose fibers ; Chemical spills ; Chemical treatment ; Composite materials ; Compressive strength ; Contact angle ; Eucalyptus ; Fibrillation ; Hazardous materials ; Nanofibers ; Nanomaterials ; Oil spills ; Organic chemistry ; Polymers ; Sorbents</subject><ispartof>Journal of nanomaterials, 2018-01, Vol.2018 (2018), p.1-11</ispartof><rights>Copyright © 2018 Márcia Zanini et al.</rights><rights>Copyright © 2018 Márcia Zanini et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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| subjects | Aerogels Biodegradability Carbohydrates Caustic soda Cellulose Cellulose fibers Chemical spills Chemical treatment Composite materials Compressive strength Contact angle Eucalyptus Fibrillation Hazardous materials Nanofibers Nanomaterials Oil spills Organic chemistry Polymers Sorbents |
| title | Obtaining Hydrophobic Aerogels of Unbleached Cellulose Nanofibers of the Species Eucalyptus sp. and Pinus elliottii |
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