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Applied Biochemistry and Biotechnology

, Volume 177, Issue 1, pp 267–277 | Cite as

Antibacterial and Antifungal Activity of Biopolymers Modified with Ionic Liquid and Laponite

  • Anshu Sharma
  • Prem Prakash
  • Kamla Rawat
  • Pratima R. SolankiEmail author
  • H. B. BohidarEmail author
Article

Abstract

In the present study, the antimicrobial properties of modified biopolymers such as gelatin and agar have been investigated. These biopolymers (agar and gelatin) are modified by dissolving in ionic liquid (IL) [1-ethyl-3-methylimidazolium chloride ([C2mim][Cl]) and 1-octyl-3-methyl imidazolium chloride ([C8mim][Cl])] solutions. It was noticed that agar-ionogel (Ag-IL), gelatin-ionogel (GB-IL), and gelatin organogel (gelatin-glycerol solution along with laponite, nanoclay) nanocomposite (GA-NC) formed are highly stable, optically clear, and transparent without any air bubbles. The antimicrobial activity of these (Ag-IL), (GB-IL), and GA-NC were analyzed for both gram-negative (Escherichia coli, Klebsiella pneumoniae) and gram-positive bacterial strains (Staphylococcus aureus and Staphylococcus pyogenes) and fungus A. niger, C. albicans. Antibacterial and antifungal activity studies were carried out at different dilutions such as 100, 99, and 90 % (v/v). It was found that Ag-IL, GB-IL, and individual IL ([C8mim][Cl]) exhibited superior antimicrobial activities, indicating that longer IL chain enhance the cell membrane permeability of S. aureus, S. pyogenes, and E. coli cells. However, GA-NC nanocomposite and [C2mim][Cl]-based composites does not exhibit any bacterial inhibition activity for all bacterial strains.

Keywords

Gelatin ionogels Antibacterial Antifungal Nanocomposite 

Notes

Acknowledgments

AS acknowledges University Grants Commission, Government of India for research fellowship. KR acknowledges receipt of DST Inspire Faculty Award. This work was supported by a grant received from Department of Science and Technology, Government of India and University Grants Commission for start-up grant.

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Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Polymer and Biophysics Laboratory, School of Physical SciencesJawaharlal Nehru UniversityNew DelhiIndia
  2. 2.Special Center for NanosciencesJawaharlal Nehru UniversityNew DelhiIndia
  3. 3.Inter University Accelerator Centre (IUAC)New DelhiIndia

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