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Redispersible Gold Nanoparticle/Polymer Composite Powders Ready for Ligand Exchange Reactions
Author(s) -
Kronawitt Julia,
Fan Ziyin,
Schöttle Marius,
Agarwal Seema,
Greiner Andreas
Publication year - 2019
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201800517
Subject(s) - vinyl alcohol , materials science , colloidal gold , polymer , nanoparticle , chemical engineering , polycaprolactone , composite number , dispersion (optics) , aqueous solution , microparticle , polymer chemistry , nanotechnology , composite material , chemistry , organic chemistry , physics , optics , engineering
Dry powders embedded with gold nanoparticles (AuNPs) are produced by spray‐drying technique from an aqueous AuNP dispersion in a poly(vinyl alcohol) (PVA) or poly(vinyl pyrrolidone) (PVP) matrix. The prepared powders consist of AuNPs stabilized in hollow capsules of PVA (PVA@AuNP) or PVP (PVP@AuNP) with an average diameter of several micrometers. The AuNP powders are dispersible in water and no agglomeration triggered by the spray drying process of AuNPs is observed. The PVA@AuNP powders are coextruded with polycaprolactone to demonstrate the industrial application of dry‐state AuNPs. With PVP@AuNP the incorporation of AuNP into other stabilizing polymers via ligand exchange method is facilitated. After each step, the active surface of the AuNPs was tested by catalytic studies.