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Hydrophobic high quality ring PMOs with an extremely high stability

Frederik Goethals UGent, Benjamin Meeus, An Verberckmoes UGent, Pascal Van Der Voort UGent and Isabel Van Driessche UGent (2010) JOURNAL OF MATERIALS CHEMISTRY. 20(9). p.1709-1716
abstract
Ordered mesoporous organosilicas with a high organic loading lead to a more hydrophobic character and can result in better mechanical, hydrothermal and chemical stability. In this paper, we first present an optimized synthesis method of periodic mesoporous organosilicas containing interconnected [Si(CH2)](3) rings in the presence of surfactant Brij-76. Therefore, two important synthesis parameters, which are the acid and surfactant concentration, were systematically varied. This optimization method results in highly ordered mesoporous materials with very high surface areas, high pore volumes, uniform cylindrical pores and thick walls. Further, it was found that the porosity can be controlled by the surfactant concentration without changing the pore diameter. In the second part, it is demonstrated that a post modification with HMDS or an auto-hydrophobization step leads to PMOs which are totally hydrophobic without losing their mesoporosity. In the last part, the impact of the hydrophobization on the (a) hydrothermal, (b) mechanical and (c) chemical stability is investigated. The results reveal that post modification with HMDS creates ordered materials that can withstand (a) steaming at 130 degrees C, (b) a mechanical compression of 272 MPa and (c) a treatment with 1 M NaOH for 2.5 h without any degradation of the silica network.
Please use this url to cite or link to this publication:
author
organization
year
type
journalArticle (original)
publication status
published
subject
keyword
ADSORPTION, PERIODIC MESOPOROUS ORGANOSILICAS, SILICA, COPOLYMER, TRIBLOCK, SURFACE, ETHYLENESILICA, MOLECULAR-SIEVES, FRAMEWORKS, ORGANIC GROUPS
journal title
JOURNAL OF MATERIALS CHEMISTRY
J. Mater. Chem.
volume
20
issue
9
pages
1709 - 1716
Web of Science type
Article
Web of Science id
000274581000012
JCR category
MATERIALS SCIENCE, MULTIDISCIPLINARY
JCR impact factor
5.099 (2010)
JCR rank
16/219 (2010)
JCR quartile
1 (2010)
ISSN
0959-9428
DOI
10.1039/b920072j
language
English
UGent publication?
yes
classification
A1
copyright statement
I have transferred the copyright for this publication to the publisher
id
920601
handle
http://hdl.handle.net/1854/LU-920601
date created
2010-04-02 11:27:25
date last changed
2014-03-17 14:30:46
@article{920601,
  abstract     = {Ordered mesoporous organosilicas with a high organic loading lead to a more hydrophobic character and can result in better mechanical, hydrothermal and chemical stability. In this paper, we first present an optimized synthesis method of periodic mesoporous organosilicas containing interconnected [Si(CH2)](3) rings in the presence of surfactant Brij-76. Therefore, two important synthesis parameters, which are the acid and surfactant concentration, were systematically varied. This optimization method results in highly ordered mesoporous materials with very high surface areas, high pore volumes, uniform cylindrical pores and thick walls. Further, it was found that the porosity can be controlled by the surfactant concentration without changing the pore diameter. In the second part, it is demonstrated that a post modification with HMDS or an auto-hydrophobization step leads to PMOs which are totally hydrophobic without losing their mesoporosity. In the last part, the impact of the hydrophobization on the (a) hydrothermal, (b) mechanical and (c) chemical stability is investigated. The results reveal that post modification with HMDS creates ordered materials that can withstand (a) steaming at 130 degrees C, (b) a mechanical compression of 272 MPa and (c) a treatment with 1 M NaOH for 2.5 h without any degradation of the silica network.},
  author       = {Goethals, Frederik and Meeus, Benjamin and Verberckmoes, An and Van Der Voort, Pascal and Van Driessche, Isabel},
  issn         = {0959-9428},
  journal      = {JOURNAL OF MATERIALS CHEMISTRY},
  keyword      = {ADSORPTION,PERIODIC MESOPOROUS ORGANOSILICAS,SILICA,COPOLYMER,TRIBLOCK,SURFACE,ETHYLENESILICA,MOLECULAR-SIEVES,FRAMEWORKS,ORGANIC GROUPS},
  language     = {eng},
  number       = {9},
  pages        = {1709--1716},
  title        = {Hydrophobic high quality ring PMOs with an extremely high stability},
  url          = {http://dx.doi.org/10.1039/b920072j},
  volume       = {20},
  year         = {2010},
}

Chicago
Goethals, Frederik, Benjamin Meeus, An Verberckmoes, Pascal Van Der Voort, and Isabel Van Driessche. 2010. “Hydrophobic High Quality Ring PMOs with an Extremely High Stability.” Journal of Materials Chemistry 20 (9): 1709–1716.
APA
Goethals, Frederik, Meeus, B., Verberckmoes, A., Van Der Voort, P., & Van Driessche, I. (2010). Hydrophobic high quality ring PMOs with an extremely high stability. JOURNAL OF MATERIALS CHEMISTRY, 20(9), 1709–1716.
Vancouver
1.
Goethals F, Meeus B, Verberckmoes A, Van Der Voort P, Van Driessche I. Hydrophobic high quality ring PMOs with an extremely high stability. JOURNAL OF MATERIALS CHEMISTRY. 2010;20(9):1709–16.
MLA
Goethals, Frederik, Benjamin Meeus, An Verberckmoes, et al. “Hydrophobic High Quality Ring PMOs with an Extremely High Stability.” JOURNAL OF MATERIALS CHEMISTRY 20.9 (2010): 1709–1716. Print.