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Characterization of polymer monoliths containing embedded nanoparticles by scanning transmission X-ray microscopy (STXM)

Citation

Arrua, RD and Hitchcock, AP and Hon, WB and West, M and Hilder, EF, Characterization of polymer monoliths containing embedded nanoparticles by scanning transmission X-ray microscopy (STXM), Analytical Chemistry, 86, (6) pp. 2876-2881. ISSN 0003-2700 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 American Chemical Society

DOI: doi:10.1021/ac403166u

Abstract

The structural and chemical homogeneity of monolithic columns is a key parameter for high efficiency stationary phases in liquid chromatography. Improved characterization techniques are needed to better understand the polymer morphology and its optimization. Here the analysis of polymer monoliths by scanning transmission X-ray microscopy (STXM) is presented for the first time. Poly(butyl methacrylate-co-ethyleneglycoldimethacrylate) [poly(BuMA-co-EDMA)] monoliths containing encapsulated divinylbenzene (DVB) nanoparticles were characterized by STXM, which gives a comprehensive, quantitative chemical analysis of the monolith at a spatial resolution of 30 nm. The results are compared with other methods commonly used for the characterization of polymer monoliths [scanning electron microscopy (SEM), transmission electron microscopy (TEM), mercury porosimetry, and nitrogen adsorption]. The technique permitted chemical identification and mapping of the nanoparticles within the polymeric scaffold. Residual surfactant, which was used during the manufacture of the nanoparticles, was also detected. We show that STXM can give more in-depth chemical information for these types of materials and therefore lead to a better understanding of the link between polymer morphology and chromatographic performance.

Item Details

Item Type:Refereed Article
Keywords:polymer monoliths, characterisation, scanning transmission X-ray microscopy
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Separation Science
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
Author:Arrua, RD (Dr Dario Arrua)
Author:Hon, WB (Dr Wei Boon Hon)
Author:Hilder, EF (Professor Emily Hilder)
ID Code:94932
Year Published:2014
Web of Science® Times Cited:9
Deposited By:Chemistry
Deposited On:2014-09-22
Last Modified:2017-10-27
Downloads:0

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