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Citation: MU Bo, LEI Zhong-Li, YANG Hong, LI Na. Preparation and Characterization of PS-b-PNIPAM/Ag Composite Particles[J]. Acta Physico-Chimica Sinica, ;2009, 25(11): 2399-2403. doi: 10.3866/PKU.WHXB20091030 shu

Preparation and Characterization of PS-b-PNIPAM/Ag Composite Particles

1.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, P. R. China

Received Date: 11 June 2009
Available Online: 8 September 2009

Amphiphilic diblock polystyrene-b-poly(N-isopropylacrylamide) (PS-b-PNIPAM) was used as a template for metal-block copolymer nanocomposite formation. Diblock copolymers were synthesized using the atom transfer radical polymerization (ATRP) method. Polyethyleneimine (PEI) acted as a crosslinking agent between Ag ions (Ag nanoparticles) and PS-b-PNIPAM colloids and was the reducing agent during the formation of Ag nanoparticles. The product was characterized by Fourier transforminfrared (FTIR) spectroscopy, X-ray diffraction (XRD), and transmission electron microscopy (TEM). Silver crystals were monocrystalline with face-centered cubic structures, which was confirmed by electron diffraction and XRD. Results revealed that the size and size distribution of the resulting silver nanoparticles based copolymer were strongly dependent on the ratio of the initial copolymer solution to silver concentration.
- Silver nanoparticle,
- Amphiphilic diblock copolymer,
- Atomtransfer radical polymerization,
- Polyethyleneimine
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