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The influences of the transfer method and particle surface chemistry on the dispersion of nanoparticles in nanocomposites

Pravaz, Olivier; Droz, Benoit; Schurtenberger, Peter LU and Dietsch, Herve (2012) In Nanoscale 4(21). p.6856-6862
Abstract
The synthesis via in situ polymerization and characterization of nanocomposites (NCs) made from silica (SiO2) nanoparticles in a methyl methacrylate (MMA) monomer matrix is reported. We first investigate the transfer of well-defined spherical silica nanoparticles (NPs) (average radius R = 24.2 +/- 3.2 nm) into the monomer solvent. We study the influence of two transfer methods and different surface chemistries on the resulting colloidal stability. The first transfer method consists of drying the silica particles into powder before dispersing them via ultrasonication in the MMA matrix. The second is based on repetitive centrifugations to exchange NPs from their synthetic milieu to pure MMA, avoiding the dried powder state. These transfer... (More)
The synthesis via in situ polymerization and characterization of nanocomposites (NCs) made from silica (SiO2) nanoparticles in a methyl methacrylate (MMA) monomer matrix is reported. We first investigate the transfer of well-defined spherical silica nanoparticles (NPs) (average radius R = 24.2 +/- 3.2 nm) into the monomer solvent. We study the influence of two transfer methods and different surface chemistries on the resulting colloidal stability. The first transfer method consists of drying the silica particles into powder before dispersing them via ultrasonication in the MMA matrix. The second is based on repetitive centrifugations to exchange NPs from their synthetic milieu to pure MMA, avoiding the dried powder state. These transfer methods are compared for two kinds of NP surface chemistry, natural silanol (Si-OH) groups of the silica NPs and an additional silane coupling agent, namely 3-(trimethoxysilyl)propyl methacrylate (TPM), which mimics the monomeric group of the MMA dispersing milieu. We then characterize the morphology of the resulting nanocomposites prepared via in situ polymerization at a fixed amount of dispersed NPs (2.2 wt%; 1 vol%) using a combination of transmission electron microscopy (TEM) from ultramicrotomed nanocomposite films, thermogravimetry (TGA) and small angle X-ray scattering (SAXS). (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nanoscale
volume
4
issue
21
pages
6856 - 6862
publisher
Royal Society of Chemistry
external identifiers
  • wos:000310940500028
  • scopus:84874437357
ISSN
2040-3372
DOI
10.1039/c2nr31846f
language
English
LU publication?
yes
id
2751b746-77a2-4896-a203-fa6e63d1bbe3 (old id 3243994)
date added to LUP
2012-12-28 10:16:53
date last changed
2017-01-01 04:08:41
@article{2751b746-77a2-4896-a203-fa6e63d1bbe3,
  abstract     = {The synthesis via in situ polymerization and characterization of nanocomposites (NCs) made from silica (SiO2) nanoparticles in a methyl methacrylate (MMA) monomer matrix is reported. We first investigate the transfer of well-defined spherical silica nanoparticles (NPs) (average radius R = 24.2 +/- 3.2 nm) into the monomer solvent. We study the influence of two transfer methods and different surface chemistries on the resulting colloidal stability. The first transfer method consists of drying the silica particles into powder before dispersing them via ultrasonication in the MMA matrix. The second is based on repetitive centrifugations to exchange NPs from their synthetic milieu to pure MMA, avoiding the dried powder state. These transfer methods are compared for two kinds of NP surface chemistry, natural silanol (Si-OH) groups of the silica NPs and an additional silane coupling agent, namely 3-(trimethoxysilyl)propyl methacrylate (TPM), which mimics the monomeric group of the MMA dispersing milieu. We then characterize the morphology of the resulting nanocomposites prepared via in situ polymerization at a fixed amount of dispersed NPs (2.2 wt%; 1 vol%) using a combination of transmission electron microscopy (TEM) from ultramicrotomed nanocomposite films, thermogravimetry (TGA) and small angle X-ray scattering (SAXS).},
  author       = {Pravaz, Olivier and Droz, Benoit and Schurtenberger, Peter and Dietsch, Herve},
  issn         = {2040-3372},
  language     = {eng},
  number       = {21},
  pages        = {6856--6862},
  publisher    = {Royal Society of Chemistry},
  series       = {Nanoscale},
  title        = {The influences of the transfer method and particle surface chemistry on the dispersion of nanoparticles in nanocomposites},
  url          = {http://dx.doi.org/10.1039/c2nr31846f},
  volume       = {4},
  year         = {2012},
}