Effect of cross-link density and the healing efficiency of self-healing poly(2-hydroxyethyl methacrylate) hydrogel

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

In this study, hydrogels of poly(2-hydroxyethyl methacrylate) with different cross-link density were prepared by the free-radical polymerization method. l-Cystine, which acts as a cross-linker, was prepared at different concentrations, ranging from 0.02 to 0.08 mol/l, to identify the concentration that provided the highest mechanical strength and healing efficacy. Healing of the hydrogels was achieved by heating above their glass transition temperature. Intermolecular diffusion of the dangling chain or chain slippage led to the healing of the gels. Results showed that 0.04 mol/l of l-cystine in poly(2-hydroxyethyl methacrylate) hydrogels provided the highest ultimate tensile strength (0.780 N/mm2) and healing recovery (92%). This healing capability was also observed using optical microscopy.

Original languageEnglish
Pages (from-to)289-294
Number of pages6
JournalE-Polymers
Volume14
Issue number4
DOIs
Publication statusPublished - 1 Jul 2014

Fingerprint

Hydrogels
Hydrogel
healing
Cystines
Cystine
Free radical polymerization
Optical microscopy
Strength of materials
Tensile strength
Gels
Heating
Recovery
free radicals
tensile strength
glass transition temperature
polymerization
recovery
hydroxyethyl methacrylate
gels
microscopy

Keywords

  • Concentration
  • Cross-linking agent
  • Molecular diffusion
  • Self-healing
  • Tensile strength

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physical and Theoretical Chemistry
  • Polymers and Plastics

Cite this

Effect of cross-link density and the healing efficiency of self-healing poly(2-hydroxyethyl methacrylate) hydrogel. / Sirajuddin, Najiyyah Abdullah; Md. Jamil, Mohd. Suzeren; Mat Lazim, Mohamad Azwani Shah.

In: E-Polymers, Vol. 14, No. 4, 01.07.2014, p. 289-294.

Research output: Contribution to journalArticle

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