Journal
CARBOHYDRATE POLYMERS
Volume 98, Issue 1, Pages 1025-1030Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.06.074
Keywords
Bio-inspired; Ionic liquid; Ion-gel; Carbon nanotube; Self-healing; Bio-adhesive
Categories
Funding
- Council of Scientific & Industrial Research, New Delhi
- UGC
- CSIR
Ask authors/readers for more resources
Guar gum is a galactomannan extracted from the seed of the leguminous shrub Cyamopsis tetragonoloba. It was found to form a soft viscoelastic gel in 1-butyl-3-methylimidazolium chloride, an ionic liquid at an optimized concentration of 10% w/v. A nanocomposite gel of the gum with enhanced strength could be prepared with 0.2% w/v of multiwalled carbon nanotubes (MWCNTs) in the ionic liquid. When the gels thus prepared were subjected to surface fractures or bisected completely, they found to self-heal at room temperature without any external interventions. The self-healing process could be repeated several times. These viscoelastic gel systems showed thixotropic nature and recovery of the storage modulus with time for several cycles was observed upon rheological investigations. The interaction took place between ionic liquid, guar gum and MWCNT was studied by SEM, TEM, FT-IR, powder XRD and rheometry. The results suggested that, upon standing at room temperature development of electrostatic interactions and the van der Waals interactions among the ionic liquid molecules facilitated the formation of reversible noncovalent bonds and eventually activated the self-healing in the gel systems through appropriate chain entanglements. (C) 2013 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available