A green method for in situ synthesis of poly(vinyl alcohol)/chitosan hydrogel thin films with entrapped silver nanoparticles

Ngoc Thang Nguyen, Jui Hsiang Liu

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

Poly(vinyl alcohol)/Chitosan (PVA/CTS) hydrogel thin films of approximately 4. μm in thickness were synthesized via ultraviolet (UV) irradiation using acrylic acid (AA) monomer as the crosslinker, without the aid of an additional photoinitiator. The prepared hydrogels with a high crosslinking density and a dense inter-porous structure were utilized both as nanoreactors and the immobilizing matrix for the formation of silver nanoparticles (AgNPs). The nanoparticles were formed through in situ reduction of silver nitrate by employing the nontoxic biochemical glucose and the accelerator sodium hydroxide in the environmentally benign medium of water. The composite films were characterized using several analysis tools, including UV-visible spectroscopy (UV/vis), Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM) and mechanical testing. The results confirmed that highly stable and uniformly distributed AgNPs were obtained over the entire hydrogel networks. The tensile test revealed that the effective incorporation of AgNPs within the hydrogel networks rendered the composite films more elastic. Because of its inter-porous structure, well distributed AgNPs, and good mechanical and biocompatible properties, as well as the green synthesis method, the AgNP-loaded PVA/CTS hydrogel thin film could be utilized as a biomaterial in medical applications.

Original languageEnglish
Pages (from-to)2827-2833
Number of pages7
JournalJournal of the Taiwan Institute of Chemical Engineers
Volume45
Issue number5
DOIs
Publication statusPublished - 2014 Jan 1

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

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