Use of Sulfobetaine-Based Block Copolymer as Stabilizer in Silver Nanoparticle Production and Catalytic Activity Studies

Kocak G., Ulker D., TUNCER C., Baker S. B., BÜTÜN V.

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY, vol.18, no.4, pp.2521-2529, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 4
  • Publication Date: 2018
  • Doi Number: 10.1166/jnn.2018.14338
  • Journal Name: JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED)
  • Page Numbers: pp.2521-2529
  • Keywords: Sulfobetaine Copolymer, Silver Nanoparticle, Catalytic Activity, p-Nitrophenol, NOBLE-METAL COLLOIDS, IN-SITU FORMATION, GOLD NANOPARTICLES, BIMETALLIC NANOPARTICLES, AQUEOUS-MEDIUM, SIZE CONTROL, MICELLES, MICELLIZATION, GLYCOL), OXIDE)
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

A zwitterionic sulfobetaine-based diblock copolymer was successfully synthesized and used in the preparation and stabilization of Ag nanoparticles (AgNPs). For the related block copolymer, a precursor AB type diblock copolymer was synthesized via atom transfer radical polymerization by using a MPEG-based ATRP macroinitiator and 2-(N-dimethylamino)ethyl methacrylate (DMA) comonomer. Tertiary amine residues of PDMA blocks in poly(ethylene glycol) methyl ether-b-poly[2(N-diethylamino)ethyl methacrylate] (MPEG-b-PDMA) precursor was then converted to polybetaine structures by reacting with 1,3-propanesultone to obtain poly(ethylene glycol) methyl ether-b-poly[3-dimethyl(methacryloyloxyethyl) ammonium propane sulfonate] (MPEG-b-P beta DMA) derivative. The resulting block copolymer was successfully used as stabilizer in the chemical and sonochemical synthesis of spherical AgNPs with a diameter in the range of 7.9-9.3 nm. The average diameter of AgNPs synthesized by sonochemical method was smaller than those synthesized by chemical method. The MPEG-b-P beta DMA diblock copolymer was determined to be a good stabilizer for AgNPs. The AgNPs dispersion was stable for more than 5 months without any flocculation at room temperature. The catalytic activity of polymer-AgNP dispersion was also investigated in the reduction of p-nitrophenol to p-aminophenol and was found to be quite effective.