Journal of Polymers and the Environment

, Volume 20, Issue 1, pp 17–22 | Cite as

A Novel Biodegradable Green Poly(l-Aspartic Acid-Citric Acid) Copolymer for Antimicrobial Applications

  • N. Mithil KumarEmail author
  • K. VaraprasadEmail author
  • K. Madhusudana Rao
  • A. Suresh Babu
  • M. Srinivasulu
  • S. Venkata NaiduEmail author
Original Paper


Poly (l-aspartic acid-citric acid) green copolymers were developed using thermal polymerization of aspartic acid (ASP) and citric acid (CA) followed by direct bulk melt condensation technique. Antibacterial properties of copolymer of aspartic acid based were investigated as a function of citric acid content. This study is focused on the microorganism inhibition performance of aspartic acid based copolymers. Results showed that inhibition properties increase with increasing citric acid content. Characterization of obtained copolymers was carried out with the help of infrared absorption spectra (FTIR), x-ray diffraction (XRD), differential scanning calorimetry (DSC) and thermo gravimetric analysis (TGA). The antibacterial activity of copolymers against bacteria like E-coli, Bacillus and pseudomonas was investigated. The copolymers showed excellent antimicrobial activities against three types of microorganisms. Overall studies indicated that the above copolymers possess a broad wound dressing activity against above three types of bacteria and may be useful as antibacterial agents.


Antibacterial activity Green copolymers and melt condensation technique 



N. Mithil Kumar thanks the University Grants Commission (UGC), Government of India, New Delhi for the financial support is the from meritorious fellowship.


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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  1. 1.Synthetic Polymer Laboratory-II, Department of Polymer Science & TechnologySri Krishnadevaraya UniversityAnantapurIndia
  2. 2.Synthetic Polymer Laboratory-I, Department of Polymer Science & TechnologySri Krishnadevaraya UniversityAnantapurIndia
  3. 3.Ion Exchange (IND) LtdHyderabadIndia
  4. 4.Department of PhysicsRayalaseema UniversityKarnoolIndia
  5. 5.Department of MicrobiologySri Krishnadevaraya UniversityAnantapurIndia

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