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Extruded Porous Protein-Lignocellulosic Blends as Fully Bio-Based Alternative to Single-Use Absorbent Plastics.

Athanasios Latras1, Pamela F M Pereira2, Amparo Jiménez-Quero2

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This summary is machine-generated.

Researchers developed new porous absorbent materials from biomass waste. These sustainable alternatives to plastics offer high saline absorption, reducing microplastic pollution in consumer products.

Keywords:
biofillersbiopolymer blendsextrusionporous materialssingle-use absorbents

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Area of Science:

  • Biomaterials Science
  • Sustainable Chemistry
  • Waste Valorization

Background:

  • Single-use plastics (SUPs) pose environmental challenges, with a need for biodegradable alternatives.
  • Current porous disposable absorbents lack the functional performance of synthetic materials.
  • Biomass waste presents an underutilized resource for developing sustainable materials.

Purpose of the Study:

  • To develop fully biopolymer-based porous absorbent materials using continuous extrusion.
  • To enhance the saline absorption capacity of these materials by incorporating biomass waste components.
  • To create a sustainable alternative to synthetic absorbents for hygiene and sanitary applications.

Main Methods:

  • Continuous extrusion of biopolymer composites from integrated proteins and lignocellulosic residues.
  • Utilizing oat husk and wheat bran, sourced from food industry byproducts.
  • Incorporating Keratin fibers derived from food waste.

Main Results:

  • Saline absorption capacity increased 1.5 times with oat husk inclusion.
  • Delignification of biomass components further improved absorption by 2 times.
  • Addition of 20 wt % Keratin fibers achieved 6.5 g/g absorbency, retaining 2 g/g, a record for extruded protein-based materials.

Conclusions:

  • Biomass waste can be upcycled into high-performance porous absorbent materials.
  • Material chemistry, particularly delignification, significantly impacts absorption properties.
  • This advancement offers a pathway to microplastic-free, biodegradable single-use porous absorbents.