SYNTHESIS OF HYBRID MESOPOROUS POLYSTYRENE-SILICA MATERIALS WITH NON-SURFACTANT CITRIC ACID AS TEMPLATE VIA SOL-GEL PROCESS*

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SYNTHESIS OF HYBRID MESOPOROUS POLYSTYRENE-SILICA MATERIALS WITH NON-SURFACTANT CITRIC ACID AS TEMPLATE VIA SOL-GEL PROCESS*

Papers | Updated：2021-06-21

- SYNTHESIS OF HYBRID MESOPOROUS POLYSTYRENE-SILICA MATERIALS WITH NON-SURFACTANT CITRIC ACID AS TEMPLATE VIA SOL-GEL PROCESS*
- Vol. 20, Issue 6, Pages: 565-572(2002)
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- Published：20 December 2002
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SYNTHESIS OF HYBRID MESOPOROUS POLYSTYRENE-SILICA MATERIALS WITH NON-SURFACTANT CITRIC ACID AS TEMPLATE VIA SOL-GEL PROCESS*[J]. 2002, 20(6): 565-572.
DOI：

SYNTHESIS OF HYBRID MESOPOROUS POLYSTYRENE-SILICA MATERIALS WITH NON-SURFACTANT CITRIC ACID AS TEMPLATE VIA SOL-GEL PROCESS*[J]. 2002, 20(6): 565-572. DOI：

摘要

Hybrid mesoporous polystyrene-silica materials were successfully prepared through HCl-catalyzed sol-gelreactions of tetraethyl orthosilicate (TEOS) and triethoxysilyl-functionalized polystyrene obtained via atom transfer radicalpolymerization (ATRP) of styrene

in the presence of citric acid (CA) as non-surfactant template or pore-forming agent andfollowed by ethanol extraction to remove template molecules. The materials were characterized by infrared spectroscopy (IR)

N2 adsorption-desorption measurements

powder X-ray diffraction (XRD)

thermogravimetric analysis (TGA) and transmission electron microscopy (TEM).The results indicate that the materials prepared with 50 wt%-60 wt% template contents have average pore sized of 2-3 nm and large surface areas(ca.886 m2/g) as well as high pore volumes (ca.0.53 cm3/g) The mesoporosity arises from interconnected channels and pores with disordered arrangements.The pore diameters and pore volumes increase as the template content is increased.The pore diameters show a little change upon heating at 200℃ overnight.However

the materials do not have good hydrothermal stability.

Abstract

N2 adsorption-desorption measurements

powder X-ray diffraction (XRD)

the materials do not have good hydrothermal stability.

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