In this paper, a new variety of pH-sensitive polymeric hydrogels (IAE) have been developed and evaluated as biocompatible hydrogels using synergetic combinations of itaconic acid (IA), acrylic acid (AA), and ethylene glycol (EG) in water medium by free radical polymerization. The prepared hydrogels were characterised by FT-IR and SEM, which revealed the presence of functional groups and the morphological aspects of the IAE based hydrogels. The detailed swelling behaviour of various stoichiometric amounts of IAE based hydrogels has been studied at varying pH (1.2, 6.0, 7.4 and 10.0) with respect to time from 0 to 360 minutes. The comparative swelling equilibrium, biodegradation and biocompatibility studies of hydrogels have also been investigated. The antibacterial activities of the IAE based hydrogels were examined using pathogenic microorganisms viz. E. coli, S. aureus and B. cereus. Furthermore, the IAE hydrogels were also subjected to antifungal activity against Aspergillus niger & Candida albicans using the agar well diffusion method at various concentrations. The improved biocompatible properties of these gels imply that the IAE hydrogels have good potential for future biomedical applications in controlled drug release.

Traditional hydrogels have shown sub-standard multifunctional, mechanical properties in biomedical field. Gold nanoparticles can provided an expanded array of nanostructured materials with exclusive biomedical properties. The nanocomposite hydrogels have expected to exhibit both nanomaterial and hydrogel properties, which may resulted in potential applications in biomedical field. Hence, the present investigation reported simple and greener approach to the preparation and properties of pH-responsive nanocomposite hydrogels (GIAE) based on itaconic acid (IA), acrylic acid, ethylene glycol and colloidal gold nanoparticles. The obtained nanocomposite hydrogels found to have desired exfoliated surface morphology and enhanced pH-sensitive swelling and thermal stability. It also showed appreciable anti-microbial properties due to presence of gold nanoparticles and IA. The cytotoxicity nature of itaconic acid based gold nanocomposite hydrogels were also developed ~ 90% due gold nanoparticles. Moreover, the degradation property of prepared nanocomposite hydrogels have been reduced due to bacterial inhibition tendency of gold nanoparticles. This work provides viewpoints to develop pH-tunable GIAE nanocomposite hydrogels with significant biological properties. The resultant nanocomposite hydrogels may be recommended for biomedical applications mere in future such as pH-sensitive drug delivery, scaffold for tissue engineering, wound healing application, antimicrobial material and nanomedicine etc.