Chemical bonding heterocoagulation of nanoparticles onto polymeric spheres by two-step addition of polymerizable coupling agent

Chika Suwabe; Daisuke Nagao; Haruyuki Ishii; Mikio Konno

doi:10.1007/s00396-015-3603-y

Chemical bonding heterocoagulation of nanoparticles onto polymeric spheres by two-step addition of polymerizable coupling agent

Chika Suwabe, Daisuke Nagao, Haruyuki Ishii, Mikio Konno

ENG - Chemical Engineering

Tohoku University

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Raspberry-shaped particles of a polymethylmethacrylate (PMMA) core chemically binding silica nanoparticles (NPs) could be synthesized with heterocoagulation in combination with two-step addition of a polymerizable silane coupling agent of 3-methacryloxypropylmethoxysilane (MPTMS) before and after the heterocoagulation, respectively. Submicron-sized PMMA particles were prepared in soap-free emulsion polymerization in the presence of MPTMS that was introduced into the PMMA particles as a scaffold for the chemical bonding. The PMMA particles were mixed with silica NPs under an acidic condition of pH = 2 to cause electrostatic heterocoagulation of the PMMA cores and the silica NPs. Then, MPTMS was added to the acidic suspension, and the suspension pH of heterocoagulated particles was raised to 8 to generate strong chemical bonding between the PMMA and silica NPs in stable particle dispersion. The strong interaction between the PMMA cores and silica NPs was demonstrated in sonication experiments where desorption of silica NPs from the PMMA cores was drastically suppressed by the two-step MPTMS addition.

Original language	English
Pages (from-to)	2095-2100
Number of pages	6
Journal	Colloid and Polymer Science
Volume	293
Issue number	7
DOIs	https://doi.org/10.1007/s00396-015-3603-y
Publication status	Published - 2015 Jul 29

Keywords

Desorption
Heterocoagulation
Nanoparticle
Silane coupling agent
Sonication

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title = "Chemical bonding heterocoagulation of nanoparticles onto polymeric spheres by two-step addition of polymerizable coupling agent",

abstract = "Raspberry-shaped particles of a polymethylmethacrylate (PMMA) core chemically binding silica nanoparticles (NPs) could be synthesized with heterocoagulation in combination with two-step addition of a polymerizable silane coupling agent of 3-methacryloxypropylmethoxysilane (MPTMS) before and after the heterocoagulation, respectively. Submicron-sized PMMA particles were prepared in soap-free emulsion polymerization in the presence of MPTMS that was introduced into the PMMA particles as a scaffold for the chemical bonding. The PMMA particles were mixed with silica NPs under an acidic condition of pH = 2 to cause electrostatic heterocoagulation of the PMMA cores and the silica NPs. Then, MPTMS was added to the acidic suspension, and the suspension pH of heterocoagulated particles was raised to 8 to generate strong chemical bonding between the PMMA and silica NPs in stable particle dispersion. The strong interaction between the PMMA cores and silica NPs was demonstrated in sonication experiments where desorption of silica NPs from the PMMA cores was drastically suppressed by the two-step MPTMS addition.",

keywords = "Desorption, Heterocoagulation, Nanoparticle, Silane coupling agent, Sonication",

author = "Chika Suwabe and Daisuke Nagao and Haruyuki Ishii and Mikio Konno",

note = "Funding Information: This research was supported by Samsung R&D Institute Japan and also partially supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT 25600001 and 26286019). Publisher Copyright: {\textcopyright} 2015, Springer-Verlag Berlin Heidelberg.",

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doi = "10.1007/s00396-015-3603-y",

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AU - Suwabe, Chika

AU - Nagao, Daisuke

AU - Ishii, Haruyuki

AU - Konno, Mikio

N1 - Funding Information: This research was supported by Samsung R&D Institute Japan and also partially supported by the Ministry of Education, Culture, Sports, Science and Technology (MEXT 25600001 and 26286019). Publisher Copyright: © 2015, Springer-Verlag Berlin Heidelberg.

PY - 2015/7/29

Y1 - 2015/7/29

N2 - Raspberry-shaped particles of a polymethylmethacrylate (PMMA) core chemically binding silica nanoparticles (NPs) could be synthesized with heterocoagulation in combination with two-step addition of a polymerizable silane coupling agent of 3-methacryloxypropylmethoxysilane (MPTMS) before and after the heterocoagulation, respectively. Submicron-sized PMMA particles were prepared in soap-free emulsion polymerization in the presence of MPTMS that was introduced into the PMMA particles as a scaffold for the chemical bonding. The PMMA particles were mixed with silica NPs under an acidic condition of pH = 2 to cause electrostatic heterocoagulation of the PMMA cores and the silica NPs. Then, MPTMS was added to the acidic suspension, and the suspension pH of heterocoagulated particles was raised to 8 to generate strong chemical bonding between the PMMA and silica NPs in stable particle dispersion. The strong interaction between the PMMA cores and silica NPs was demonstrated in sonication experiments where desorption of silica NPs from the PMMA cores was drastically suppressed by the two-step MPTMS addition.

AB - Raspberry-shaped particles of a polymethylmethacrylate (PMMA) core chemically binding silica nanoparticles (NPs) could be synthesized with heterocoagulation in combination with two-step addition of a polymerizable silane coupling agent of 3-methacryloxypropylmethoxysilane (MPTMS) before and after the heterocoagulation, respectively. Submicron-sized PMMA particles were prepared in soap-free emulsion polymerization in the presence of MPTMS that was introduced into the PMMA particles as a scaffold for the chemical bonding. The PMMA particles were mixed with silica NPs under an acidic condition of pH = 2 to cause electrostatic heterocoagulation of the PMMA cores and the silica NPs. Then, MPTMS was added to the acidic suspension, and the suspension pH of heterocoagulated particles was raised to 8 to generate strong chemical bonding between the PMMA and silica NPs in stable particle dispersion. The strong interaction between the PMMA cores and silica NPs was demonstrated in sonication experiments where desorption of silica NPs from the PMMA cores was drastically suppressed by the two-step MPTMS addition.

KW - Desorption

KW - Heterocoagulation

KW - Nanoparticle

KW - Silane coupling agent

KW - Sonication

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Chemical bonding heterocoagulation of nanoparticles onto polymeric spheres by two-step addition of polymerizable coupling agent

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Keywords

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