Effect of Poly(vinyl alcohol) Concentration on the Micro/Mesopore Structure of SBA15 Silica

In this work, a series of micro/mesoporous SBA15 silica materials were synthesized using P123 and poly(vinyl alcohol) (PVA) as co-templates. The pore structure of the prepared SBA15 was observed to be a function of the PVA concentration. When the amount of PVA was relatively small, the specific surf...

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Bibliographic Details
Published in:Materials 2022-12, Vol.15 (24), p.8900
Main Authors: Kim, Seongmin, Jung, Minuk, Han, Seongsoo, Jeon, Ho-Seok, Han, Yosep
Format: Article
Language:English
Subjects:
Adsorption
Energy dissipation
Micelles
Nitrogen
Polyethylene glycol
Polyethylene oxide
Polypropylene glycol
Polyvinyl alcohol
Pore size
Porous materials
Sensors
Silica
Silicon dioxide
Surfactants
Synthesis
Thickness
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Summary:In this work, a series of micro/mesoporous SBA15 silica materials were synthesized using P123 and poly(vinyl alcohol) (PVA) as co-templates. The pore structure of the prepared SBA15 was observed to be a function of the PVA concentration. When the amount of PVA was relatively small, the specific surface area, micropore volume, and pore wall thickness of the synthesized SBA15 were considerably large. By contrast, when a large amount of PVA was added, the pore wall thickness was greatly reduced, but the mesopore volume and size increased. This is because the added PVA interacted with the polyethylene oxide (PEO) in the shells of the P123 micelles. Furthermore, when the amount of PVA was increased, the core polypropylene oxide (PPO) block also increased, owing to the enhanced aggregation of the P123/PVA mixed micelles. This research contributes to a basic comprehension of the cooperative interactions and formation process underlying porous silica materials, assisting in the rational design and synthesis of micro/mesoporous materials.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15248900