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Corncob arabinoxylan for new materials.

Itziar Egüés1, Agnes M Stepan2, Arantxa Eceiza1

  • 1Chemical and Environmental Engineering Department, University of the Basque Country, Plaza Europa, 1, 20018 Donostia-San Sebastián, Spain.

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Corncob agricultural waste yields arabinoxylan for film production. Purified arabinoxylan films show improved mechanical strength and water resistance, making them suitable for various applications.

Keywords:
AcetylationArabinoxylanCorncobFilmsPurification

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Area of Science:

  • Agricultural Science
  • Materials Science
  • Polymer Science

Background:

  • Corncob agricultural waste is a potential source of valuable biopolymers.
  • Arabinoxylan, a major component of corncob, can be extracted and modified.
  • Developing sustainable materials from agricultural waste is crucial for environmental and economic benefits.

Purpose of the Study:

  • To extract and purify arabinoxylan from corncob agricultural waste.
  • To prepare and characterize films using different arabinoxylan samples.
  • To evaluate the effect of purification and acetylation on film properties for potential applications.

Main Methods:

  • Extraction of crude arabinoxylan (CCAX) from corncob.
  • Purification of CCAX via washing and bleaching.
  • Acetylation of bleached CCAX.
  • Preparation and mechanical testing of arabinoxylan films.
  • Contact angle and thermal analysis of the films.

Main Results:

  • Crude arabinoxylan films were water-soluble with poor mechanical properties.
  • Purification significantly enhanced Young's modulus (1400-1600 MPa) and strength (53 MPa).
  • Acetylated bleached arabinoxylan films exhibited superior thermal resistance (325°C), strength (67 MPa), and flexibility (13%).

Conclusions:

  • Purified arabinoxylan from corncob is a promising material for film applications.
  • Modification through purification and acetylation improves film performance.
  • Sustainable sourcing of biopolymers from agricultural waste offers viable alternatives to conventional materials.