Fabrication of agar/biopolymer blend aerogels in ionic liquid and co-solvent mixture

Ahmad Adlie Shamsuri, Dzulkefly Kuang Abdullah, Rusli Daik

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

In the present study, a biopolymer (cellulose, rice starch or zein protein) was dissolved in the ionic liquid (l-butyl-3methylimidazolium chloride) and co-solvent (dimethyl sulfoxide) mixture (1:1 weight ratio), and then blended with the agar solution, followed by gelation at low temperature. The blends were soaked and shaken in 250 mL distilled water, washed and freeze-dried. The agar/biopolymer contents were varied as 1:1, 1:1.5 and 1:2 weight ratios. The bulk densities, melting point temperatures (T m), FTIR spectra, surface morphologies, surface areas and pore size diameters of the blend aerogels were determined and characterized. The lowest bulk density (25.69 mg cm -3 ) was obtained for agar/rice starch, at a 1:2 weight ratio. DSC thermograms indicated depression in T m, with the addition of biopolymers. FTIR spectra showed the presence of functional groups of blend aerogels components. SEM micrographs of blend aerogels indicated the presence of pores in their internal surface. The BET surface areas and pore size diameters of the blend aerogels (1:2 weight ratio) ranged from 371 to 478 m 2 g -1 and from 34 to 63 nm, respectively. This study led to the conclusion that the mixture of l-butyl-3-methylimidazolium chloride and dimethyl sulfoxide could be used as a blend medium for the fabrication of agar/biopolymer blend aerogels.

Original languageEnglish
Pages (from-to)45-52
Number of pages8
JournalCellulose Chemistry and Technology
Volume46
Issue number1-2
Publication statusPublished - Jan 2012

Fingerprint

Ionic Liquids
Biopolymers
Aerogels
Ionic liquids
Agar
Fabrication
Dimethyl sulfoxide
Dimethyl Sulfoxide
Starch
Pore size
Zein
Gelation
Cellulose
Temperature
Functional groups
Surface morphology
Melting point
Chlorides
Proteins
Scanning electron microscopy

Keywords

  • Agar
  • Biopolymer
  • Blend aerogel
  • Co-solvent
  • Ionic liquid

ASJC Scopus subject areas

  • Materials Chemistry
  • Organic Chemistry

Cite this

Fabrication of agar/biopolymer blend aerogels in ionic liquid and co-solvent mixture. / Shamsuri, Ahmad Adlie; Abdullah, Dzulkefly Kuang; Daik, Rusli.

In: Cellulose Chemistry and Technology, Vol. 46, No. 1-2, 01.2012, p. 45-52.

Research output: Contribution to journalArticle

Shamsuri, Ahmad Adlie ; Abdullah, Dzulkefly Kuang ; Daik, Rusli. / Fabrication of agar/biopolymer blend aerogels in ionic liquid and co-solvent mixture. In: Cellulose Chemistry and Technology. 2012 ; Vol. 46, No. 1-2. pp. 45-52.
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