2024-03-28T10:08:05Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:00027930
2023-01-16T04:20:08Z
320:321:322
Synthesis of polystyrene@silica particles through soap-free emulsion polymerization and sol-gel reaction on polymer surfaces
Yamamoto, Tetsuya
Takahashi, Yuya
open access
© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Polystyrene@silica particle
Colloidal stability
Sol-gel reaction
Surface reaction
Polystyrene@silica particles were produced through soap-free emulsion polymerization (SFEP) of styrene and N-vinylacetamide (NVA) via the sol-gel reactions of tetraethyl orthosilicate (TEOS) on polymer particle surfaces. Different amounts of NVA were used to prepare polystyrene particles using the SFEP process. The particles covered with poly-NVA then underwent the Stöber process to form an outer silica shell. NVA was found to stabilize the polymer colloids and improve their stability by steric effects, even after the positive charge on the polymer surface was partially neutralized by the electrostatically adsorbed TEOS, which tends to induce particle aggregation. Further, the –NH functional groups on NVA catalyzed the hydrolysis of TEOS in the sol-gel reaction to form silica. Consequently, small, monodisperse, and stable core-shell particles were formed despite having a low zeta potential.
ファイル公開:2021-01-01
Elsevier
2019-01
eng
journal article
AM
http://hdl.handle.net/2237/00030129
https://nagoya.repo.nii.ac.jp/records/27930
https://doi.org/10.1016/j.apt.2018.10.025
0921-8831
Advanced Powder Technology
30
1
214
218
https://nagoya.repo.nii.ac.jp/record/27930/files/APT2019YManu-V50-rev3-.pdf
application/pdf
694.6 kB
2021-01-01