One-step Preparation and Antibacterial Property of Poly(N-iso-propyl-acrylamide) Grafted Poly(acrylonitrile/styrene) Microspheres Immobilized with Silver Nanoparticles
✍ Scribed by Jiao FENG; Liheng FAN; Hong CHU; Wanbin XIONG; Jinqiang JIANG; Mingqing CHEN
- Publisher
- John Wiley and Sons
- Year
- 2009
- Tongue
- English
- Weight
- 91 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0256-7660
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Monodispersed silver nanoparticles were immobilized onto the surface of poly(N‐isopropylacrylamide) grafted poly(acrylonitrile/styrene) (PNIPAAm‐g‐PAN/PSt) microspheres by a one‐step method using AgNO~3~ as a silver source. This process was performed via the coordination interaction between Ag^+^ ions and amide groups on PNIPAAm‐g‐PAN/PSt microsphere surfaces with the reduction of the corresponding ions by ethanol taking place simultaneously. Fourier transform infrared (FTIR) spectroscopy and ultraviolet (UV)‐visible spectra illustrated that the silver nanoparticles were successfully immobilized onto the PNIPAAm‐g‐PAN/PSt microspheres. The size and morphology of silvered microspheres were characterized by transmission electron microscopy (TEM). The weight percent of silver nanoparticles immobilized onto the microspheres was 12% based on the determination of thermogravimetric analysis (TGA). The antibacterial tests demonstrated that the as‐prepared silvered microspheres showed activity against Gram‐negative bacteria.