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Cellulosic supergel for oil and water dual absorption and remediation. | LitMetric

Cellulosic supergel for oil and water dual absorption and remediation.

Int J Biol Macromol

Department of Textile and Fibre Engineering, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India. Electronic address:

Published: December 2024

AI Article Synopsis

  • A new binate cellulosic supergel was created to simultaneously absorb oil and water contaminants, using a high internal phase emulsion (HIPE) method.
  • The scaffold of the supergel was made from a combination of wood pulp cellulose, hydroxyethyl cellulose, and polyacrylic acid, achieving high porosity with micron-sized interconnected pores.
  • This supergel demonstrated a high oil absorption capacity and maintained its performance across multiple cycles, effectively remediating both oil and water pollutants in a single process.

Article Abstract

An oil-water absorbing binate cellulosic supergel was developed for dual remediation of oil as well as water contamination. Scaffold for supergel was developed using high internal phase emulsion (HIPE) templating of an interpenetrating network of wood pulp cellulose (WPC) and hydroxyethyl cellulose (HEC) with polyacrylic acid (PAA). The HIPE was formed by dispersing dodecane in a continuous aqueous phase of WPC, HEC, and acrylic acid (AA) stabilized using sodium dodecyl sulfate (SDS). Micron-sized, interconnected pores were uniformly formed within the scaffold thereby achieving a remarkable porosity of 96.5 ± 4.8 % and a density of 0.054 ± 0.015 g/cm. Combining emulsion templating with formation of inter-penetrating network (IPN) provided a unique approach to tailor pore size of the scaffold which unconventionally turned out to be smaller than the droplet size of the emulsion. The scaffold showed a significantly higher oil sorption value of 29.8 ± 2.9 g/g because of enhanced filling and trapping mechanism of oil in the porous structure of the scaffold. The scaffold showed persistent water or oil sorption for ten sorption-desorption cycles and successfully used to sorb both aqueous as well as oil media together thereby offering remediation for both in a single step from toxic wastes such as dyes.

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Source
http://dx.doi.org/10.1016/j.ijbiomac.2024.137943DOI Listing

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