Plasticizing effect of choline chloride/urea eutectic-based ionic liquid on physicochemical properties of agarose films

Ahmad Adlie Shamsuri, Rusli Daik

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Agarose films were formed with the addition of 30 to 70 wt% choline chloride/urea eutectic-based ionic liquid (ChCl/Urea). The ChCl/Urea was prepared through complexation at a 1:2 mole ratio. The films were prepared by dissolving ChCl/Urea in distilled water followed by dispersion of the agarose at 95 °C. The solution was gelled at room temperature, and the formed gel was dried in an oven overnight at 70 °C. Mechanical testing indicated that the agarose film containing 60 wt% ChCl/Urea had higher tensile extension and tensile strain at break compared to the pristine agarose film. The addition of ChCl/Urea also reduced the glass transition temperature (Tg) of agarose films. Cross-section SEM images of the agarose films showed that surface roughness disappeared with the incorporation of ChCl/Urea. FTIR spectra confirmed the presence of intermolecular hydrogen bonding between agarose and ChCl/Urea. XRD patterns demonstrated that an amorphous phase was obtained when ChCl/Urea was added. Agarose films containing more ChCl/Urea exhibited higher transparency, as measured by a UV-Vis spectrometer. In summary, the physicochemical properties of agarose films were evidently affected by the incorporation of the ChCl/Urea as a plasticizing agent.

Original languageEnglish
Pages (from-to)4760-4775
Number of pages16
JournalBioResources
Volume7
Issue number4
Publication statusPublished - 2012

Fingerprint

Ionic Liquids
physicochemical property
Choline
Ionic liquids
Urea
Sepharose
Eutectics
urea
chloride
effect
ionic liquid
Ultraviolet spectrometers
Mechanical testing
Tensile strain
Ovens
Complexation
surface roughness
complexation
transparency
Transparency

Keywords

  • Agarose film
  • Choline chloride/urea
  • Eutectic-based ionic liquid
  • Plasticizer

ASJC Scopus subject areas

  • Waste Management and Disposal
  • Environmental Engineering
  • Bioengineering

Cite this

Plasticizing effect of choline chloride/urea eutectic-based ionic liquid on physicochemical properties of agarose films. / Shamsuri, Ahmad Adlie; Daik, Rusli.

In: BioResources, Vol. 7, No. 4, 2012, p. 4760-4775.

Research output: Contribution to journalArticle

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