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Park, Soojin
Nano-Functional Materials Lab
Research Interests
  • Block Copolymers, nanostructured materials for Lithium-Ion batteries, wearable and stretchable energy storage applications

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Preparation of silica nanospheres and porous polymer membranes with controlled morphologies via nanophase separation

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Title
Preparation of silica nanospheres and porous polymer membranes with controlled morphologies via nanophase separation
Author
Lee, Jung-PilChoi, SinhoPark, Soojin
Keywords
Carbon source; Carbonization process; Controlled morphology; Different structure; In-situ; Matrix components; Mixing ratios; Nano scale; Nanophase separation; Polymer content; Porous carbons; Porous polymers; Random network; Silica beads; Silica nanospheres; Silica sols; Silica Sphere; Silica structures; Tetraorthosilicate
Issue Date
201208
Publisher
SPRINGER
Citation
NANOSCALE RESEARCH LETTERS, v.7, no., pp. -
Abstract
We successfully synthesized two different structures, silica nanospheres and porous polymer membranes, via nanophase separation, based on a sol-gel process. Silica sol, which was in situ polymerized from tetraorthosilicate, was used as a precursor. Subsequently, it was mixed with a polymer that was used as a matrix component. It was observed that nanophase separation occurred after the mixing of polymer with silica sol and subsequent evaporation of solvents, resulting in organizing various structures, from random network silica structures to silica spheres. In particular, silica nanospheres were produced by manipulating the mixing ratio of polymer to silica sol. The size of silica beads was gradually changed from micro- to nanoscale, depending on the polymer content. At the same time, porous polymer membranes were generated by removing the silica component with hydrofluoric acid. Furthermore, porous carbon membranes were produced using carbon source polymer through the carbonization process.
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DOI
http://dx.doi.org/10.1186/1556-276X-7-440
ISSN
1556-276X
Appears in Collections:
ECHE_Journal Papers
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