+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Time-resolved in situ small-angle X-ray scattering study of silica particle formation in nonionic water-in-oil microemulsions



Time-resolved in situ small-angle X-ray scattering study of silica particle formation in nonionic water-in-oil microemulsions



Langmuir 24(10): 5225-5228



The formation of silica particles by the ammonia-catalyzed hydrolysis of tetraethyl orthosilicate (TEOS) in the polyoxyethylene (5) nonylphenyl ether (NP-5)/cyclohexane/water microemulsion system was investigated by time-resolved small-angle X-ray scattering (SAXS). The SAXS data could be modeled as a combination of two species where one describes the silica-particle containing microemulsion droplets and the other the reverse droplets. The analysis allowed the determination of the evolution of the system of particles of silica and reverse droplets. A model of nucleation and growth of the silica particles is confirmed and the volume fraction versus time data for the silica particles is in agreement with first order kinetics with respect to TEOS concentration. Moreover to describe the long time evolution of the system, a correlation among the silica particles has been taken into account by introducing a structure factor with a local silica volume fraction eta = 0.1. This high local density is 2 orders of magnitude larger than the global silica fraction and can be explained in terms of depleting interaction.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 056587591

Download citation: RISBibTeXText

PMID: 18429625

DOI: 10.1021/la8001477


Related references

Monitoring early stages of silver particle formation in a polymer solution by in situ and time resolved small angle X-ray scattering. Nanoscale 2(11): 2447-2455, 2010

Time-resolved small-angle X-ray scattering studies of polymer-silica nanocomposite particles: initial formation and subsequent silica redistribution. Journal of the American Chemical Society 133(4): 826-837, 2011

Structure and dynamics of water in nonionic reverse micelles: a combined time-resolved infrared and small angle x-ray scattering study. Journal of Chemical Physics 137(4): 044503, 2012

Monodisperse Iron Oxide Nanoparticles by Thermal Decomposition: Elucidating Particle Formation by Second-Resolved in Situ Small-Angle X-ray Scattering. Chemistry of Materials 29(10): 4511-4522, 2017

Formation of hydroxysulphate and hydroxycarbonate green rusts in the presence of zinc using time-resolved in situ small and wide angle X-ray scattering. Mineralogical Magazine 72(1): 159-162, 2008

Small-angle x-ray scattering studies on nonionic microemulsions. Physical Review. A General Physics 39(8): 4125-4131, 1989

Fast nucleation and growth of ZIF-8 nanocrystals monitored by time-resolved in situ small-angle and wide-angle X-ray scattering. Angewandte Chemie 50(35): 8067-8071, 2011

Kinetics of silica particle formation in nonionic W/O microemulsions from TEOS. Aiche Journal 42(11): 3153-3163, 1996

Combined electrospray-scanning mobility particle sizer (ES-SMPS) and time-resolved synchrotron radiation-small-angle X-ray scattering (SR-SAXS) investigation of colloidal silica aggregation. Part II. Influence of aggregation initiator on gel stability. Journal of Physical Chemistry. B 115(31): 9547-9555, 2011

Growth of mesoporous silica nanoparticles monitored by time-resolved small-angle neutron scattering. Langmuir 28(9): 4425-4433, 2012

In situ tensile testing of human aortas by time-resolved small-angle X-ray scattering. Journal of Synchrotron Radiation 12(Pt 6): 727-733, 2005

Characterization of the initial stages of SBA-15 synthesis by in situ time-resolved small-angle X-ray scattering. Journal of Physical Chemistry. B 109(48): 22780-22790, 2005

In situ studies of monosaccharide gelation using the small-angle X-ray scattering time-resolved method. Langmuir 20(18): 7374-7377, 2004

In situ synchrotron small-angle X-ray scattering/X-ray diffraction study of the formation of SBA-15 mesoporous silica. Langmuir 20(12): 4885-4891, 2004

Polysiloxane network formation observed by time-resolved small-angle X-ray scattering. Polymer Gels and Networks 1(1): 45-60, 1993