Nonsolvents-induced swelling of poly(methyl methacrylate) nanoparticles

Atsuomi Shundo, Koichiro Hori, David P. Penaloza, Kazuki Yoshihiro, Annaka Masahiko, Keiji Tanaka

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Polymer nanoparticles have been used in a wide variety of applications. In most of these applications, they are generally dispersed in a non-solvent. However, the effect of the non-solvent on the structure, physical properties and function of the nanoparticles has not yet ever taken into account. In this study, monodispersed poly(methyl methacrylate) (PMMA) nanoparticles were prepared by a surfactant-free emulsion polymerization. The PMMA nanoparticles were dispersed in water and in methanol, both typical non-solvents for PMMA, so that we could discuss the effect of the non-solvent on the nanoparticles. Dynamic light scattering measurements revealed that the hydrodynamic radius of the PMMA nanoparticles in methanol was larger than the same PMMA dispersed in water. Their DLS values were also larger than the radius of the nanoparticles measured by atomic force microscopy. When pyrene was dispersed in methanol with the PMMA nanoparticles, it was incorporated into the nanoparticles. These results clearly indicate that non-solvent molecules can be sorbed into polymer nanoparticles because the area of the interface, where polymer segments might be dissolved into liquid phases, as the total volume is quite larger for such nanoparticles. Therefore, based on our findings, it can be arguably established that the present assumption for a polymer not to be swollen in its non-solvent is not necessarily true.

Original languageEnglish
Pages (from-to)16574-16578
Number of pages5
JournalPhysical Chemistry Chemical Physics
Volume15
Issue number39
DOIs
Publication statusPublished - Oct 21 2013

Fingerprint

Polymethyl Methacrylate
polymethyl methacrylate
swelling
Swelling
Nanoparticles
nanoparticles
Polymers
Methanol
methyl alcohol
polymers
radii
Water
Emulsion polymerization
pyrenes
Dynamic light scattering
Surface-Active Agents
water
emulsions
Atomic force microscopy
liquid phases

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Cite this

Nonsolvents-induced swelling of poly(methyl methacrylate) nanoparticles. / Shundo, Atsuomi; Hori, Koichiro; Penaloza, David P.; Yoshihiro, Kazuki; Masahiko, Annaka; Tanaka, Keiji.

In: Physical Chemistry Chemical Physics, Vol. 15, No. 39, 21.10.2013, p. 16574-16578.

Research output: Contribution to journalArticle

Shundo, Atsuomi ; Hori, Koichiro ; Penaloza, David P. ; Yoshihiro, Kazuki ; Masahiko, Annaka ; Tanaka, Keiji. / Nonsolvents-induced swelling of poly(methyl methacrylate) nanoparticles. In: Physical Chemistry Chemical Physics. 2013 ; Vol. 15, No. 39. pp. 16574-16578.
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