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Abstract <p>The majority of increasingly accumulating textile waste around the globe remains underutilized due to economic and technological limitations, while the continued reliance on single-use, fossil-based packaging materials persists in the absence of viable, sustainable alternatives. Cellulose derived from cotton-based textile waste can be effectively utilized for foam production through dissolution in ionic liquids, modification with fatty acid chlorides, and precipitation of cellulose derivatives using aqueous anti-solvents. Cotton textiles were dissolved in 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]). The cellulose was esterified in bulk using palmitoyl chloride to reduce the formation of hydrogen bonds and improve plasticity. The resulting foams exhibited densities as low as 0.17&#xa0;g∙cm<sup>−3</sup>, with hardnesses ranging from 60 to 93 Shore E and compressive strengths between 0.29–0.57&#xa0;MPa, comparable to expanded polystyrene (0.07–0.41&#xa0;MPa). These findings support the potential of cellulose-based foams produced with ionic liquids as sustainable alternatives to synthetic-polymer-based foams in packaging applications.</p> Graphical Abstract <p></p>

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Denim Dream: Recycling Post-Consumer Jeans into Low-Density Water-Repellent Cellulose Foams

  • 期刊论文

  • 发表日期：

    2026年2月16日

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  • David Uslar,
  • Hans Priks,
  • Karl Jakob Levin,
  • Lancy Peter Lopes,
  • Tarmo Tamm

摘要

Abstract

The majority of increasingly accumulating textile waste around the globe remains underutilized due to economic and technological limitations, while the continued reliance on single-use, fossil-based packaging materials persists in the absence of viable, sustainable alternatives. Cellulose derived from cotton-based textile waste can be effectively utilized for foam production through dissolution in ionic liquids, modification with fatty acid chlorides, and precipitation of cellulose derivatives using aqueous anti-solvents. Cotton textiles were dissolved in 1-ethyl-3-methylimidazolium acetate ([EMIM][OAc]). The cellulose was esterified in bulk using palmitoyl chloride to reduce the formation of hydrogen bonds and improve plasticity. The resulting foams exhibited densities as low as 0.17 g∙cm−3, with hardnesses ranging from 60 to 93 Shore E and compressive strengths between 0.29–0.57 MPa, comparable to expanded polystyrene (0.07–0.41 MPa). These findings support the potential of cellulose-based foams produced with ionic liquids as sustainable alternatives to synthetic-polymer-based foams in packaging applications.

Graphical Abstract