Title
Temperature-sensitive semi-IPN composite hydrogels for antibacterial applications
Date Issued
05 July 2019
Access level
metadata only access
Resource Type
journal article
Author(s)
Jayaramudu T.
Sadiku E.R.
Amalraj J.
Centro de Investigación de Polímeros Avanzados
Publisher(s)
Elsevier B.V.
Abstract
This investigation aims to develop bacterial-resistant temperature-sensitive semi-IPN silver composite hydrogels via a three-step method. Primarily, the temperature-sensitive semi-IPN hydrogels of N-isopropylacrylamide and various concentrations of Pluronic F-127 (PF 127), have been prepared via a free radical polymerization technique. Furthermore, silver ions were encapsulated in the temperature-sensitive semi-IPN hydrogels via the swelling process. Finally, the bacterial-resistant semi-IPN silver composite hydrogels were developed by using an aqueous neem extract as a reducing agent. Semi-IPN hydrogels with higher amount of PF-127 showed a water uptake that was three times better than the pristine poly (N-isopropylacrylamide). The phase transition temperature of the semi-IPN silver composite hydrogels was found to be 34.24 °C, which was confirmed from the swelling and the DSC studies. The resulting hydrogels were characterized by: FTIR, UV–vis, X-ray diffraction, SEM and TEM analyses. The TEM results confirmed the fact that the nanoparticles formed were of spherical shape with a dimension of ˜8 ± 2 nm. The semi-IPN silver-composite hydrogels showed excellent bacteria inhibition against gram-positive bacteria. The results demonstrated that the temperature-sensitive semi-IPN silver-composite hydrogels developed can be employed for clinical applications.
Start page
307
End page
316
Volume
572
Language
English
OCDE Knowledge area
Biotecnología ambiental
Scopus EID
2-s2.0-85064317155
Source
Colloids and Surfaces A: Physicochemical and Engineering Aspects
ISSN of the container
0927-7757
Source funding
Fondo Nacional de Desarrollo Científico y Tecnológico
Sponsor(s)
The author, Tippabattini Jayaramudu wishes to acknowledge the Fondecyt Postdoctoral Project No 3170272 and Universidad de Talca, 747, Talca, Chile. The authors acknowledge PIEI-QUIMBIO, and Proyecto de Investigacion enlace FONDECYT (N° 300061) Universidad de Talca. KVP wishes to acknowledge Fondecyt 11160073 & CIPA, CONICYT Regional, GORE BIO-BIO, R17A10003.
Sources of information: Directorio de Producción Científica Scopus