Heat extraction of corn fiber hemicellulose

Zsuzsa Benko, Alexandra Andersson, Zs. Szengyel, Melinda Gáspár, K. Réczey, Henrik Stålbrand

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

Water-soluble hemicellulose was extracted from corn fiber with microwave-assisted heat treatment. The effects of treatment temperature and initial pH of the aqueous extraction media were investigated regarding hemicellulose recovery and molecular mass of the isolated polysaccharides. In treatments carried out at neutral pH (simple water extraction), it has been demonstrated that hemicellulose recovery could be increased by applying higher treatment temperatures. However, the molecular weight of isolated hemicellulose gets significantly lower. For example, 10% of the raw materials' xylan was extracted at 160°C and about 30% recovery was reached at 210°C. However, the molecular mass of the isolated polysaccharide at 210°C (5.82 × 104) was about half of that measured at 160°C (1.37 × 105). Reducing the pH with sulfuric acid resulted in shorter polymer chains (1.7 × 104) and lower hemicellulose yields (2.2%). Application of sodium hydroxide in the treatment showed that, compared with acid, considerably higher yields (11%) with longer polysaccharide chains (1.3 × 105) could be obtained.

Original languageEnglish
Pages (from-to)253-265
Number of pages13
JournalApplied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology
Volume137-140
Issue number1-12
DOIs
Publication statusPublished - Apr 2007

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Polysaccharides
Zea mays
Hot Temperature
Molecular mass
Recovery
Fibers
Sulfuric acid
Water
Raw materials
Xylans
Molecular weight
Sodium Hydroxide
Heat treatment
Microwaves
Sodium
Temperature
Acids
Polymers
Molecular Weight
hemicellulose

Keywords

  • Alkaline extraction
  • Carbohydrate analysis
  • Maize
  • Microwave-assisted fractionation
  • Size exclusion chromatography
  • Weight-average molecular weight

ASJC Scopus subject areas

  • Biochemistry
  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology
  • Molecular Biology

Cite this

Heat extraction of corn fiber hemicellulose. / Benko, Zsuzsa; Andersson, Alexandra; Szengyel, Zs.; Gáspár, Melinda; Réczey, K.; Stålbrand, Henrik.

In: Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology, Vol. 137-140, No. 1-12, 04.2007, p. 253-265.

Research output: Contribution to journalArticle

Benko, Zsuzsa ; Andersson, Alexandra ; Szengyel, Zs. ; Gáspár, Melinda ; Réczey, K. ; Stålbrand, Henrik. / Heat extraction of corn fiber hemicellulose. In: Applied Biochemistry and Biotechnology - Part A Enzyme Engineering and Biotechnology. 2007 ; Vol. 137-140, No. 1-12. pp. 253-265.
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