Environmentally Friendly Hydrophobic Sponges for Oil Removal

  • Author: ChemistryViews
  • Published: 13 December 2021
  • Copyright: Wiley-VCH GmbH
  • Associated Societies: American Chemical Society (ACS), USA
thumbnail image: Environmentally Friendly Hydrophobic Sponges for Oil Removal

Water can be polluted by, e.g., oil, organic compounds, or heavy metals. Removing those contaminants is important for both the environment and human health. Absorbent materials provide a simple way to do this, but existing materials can be challenging to recycle or biodegrade. Nontoxic, biodegradable absorbents based on renewable materials that have suitable absorption properties would, thus, be useful. Chitosan-based sponges, for example, could be a promising candidate, but their hydrophilicity and mechanical properties limit applications.

Jinpeng Wang, Beijing Technology and Business University (BTBU), China, and colleagues have developed porous hydrophobic chitosan-based sponges that were grafted with β-cyclodextrin, citronellal, and palmitic acid to optimize their properties as absorbents. The team first prepared sponges from chitosan, aminoethyl-β-cyclodextrin, and sodium phytate as a crosslinking agent. The resulting sponges were dipped in a citronellal solution and dried. Immersion in a palmitic acid solution and another drying step gave the desired functionalized sponges.

The modifications of the chitosan increase the material's hydrophobicity and absorption properties, as well as the mechanical stability. The preparation is environmentally friendly and the sponges show good absorption capacities for n-hexane, trichloromethane, vacuum pump oil, and peanut oil. The material selectively removes, e.g., peanut oil or chloroform from water. It also shows good biodegradability.



Article Views: 1842

Sign in Area

Please sign in below

Additional Sign In options

Please note that to comment on an article you must be registered and logged in.
Registration is for free, you may already be registered to receive, e.g., the newsletter. When you register on this website, please ensure you view our terms and conditions. All comments are subject to moderation.

Article Comments - To add a comment please sign in

If you would like to reuse any content, in print or online, from ChemistryViews.org, please contact us first for permission and consult our permission guidance prior to making your request

Follow on Facebook Follow on Twitter Follow on YouTube Follow on LinkedIn Follow on Instagram RSS Sign up for newsletters

Magazine of Chemistry Europe (16 European Chemical Societies) published by Wiley-VCH