Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films

Keiji Tanaka, Yoshihisa Fujii, Hironori Atarashi, Kei Ichi Akabori, Masahiro Hino, Toshihiko Nagamura

Research output: Contribution to journalArticle

72 Citations (Scopus)

Abstract

Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane, and methanol, which are "nonsolvents" for dPMMA, were examined along the direction normal to the interface by specular neutron reflectivity (NR). The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. To conserve mass, the swelling of the film by the nonsolvents is accompanied by an increase in the film thickness. The change in the film thickness estimated by NR was in excellent accord with the results of direct observations using atomic force microscopy (AFM). The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by AFM. The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.

Original languageEnglish
Pages (from-to)296-301
Number of pages6
JournalLangmuir
Volume24
Issue number1
DOIs
Publication statusPublished - Jan 1 2008

Fingerprint

Polymethyl Methacrylate
Polymethyl methacrylates
polymethyl methacrylate
swelling
Swelling
Hexanes
Hexane
causes
Water
water
Methanol
Film thickness
Atomic force microscopy
Neutrons
Liquids
film thickness
methyl alcohol
liquids
atomic force microscopy
reflectance

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Cite this

Tanaka, K., Fujii, Y., Atarashi, H., Akabori, K. I., Hino, M., & Nagamura, T. (2008). Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films. Langmuir, 24(1), 296-301. https://doi.org/10.1021/la702132t

Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films. / Tanaka, Keiji; Fujii, Yoshihisa; Atarashi, Hironori; Akabori, Kei Ichi; Hino, Masahiro; Nagamura, Toshihiko.

In: Langmuir, Vol. 24, No. 1, 01.01.2008, p. 296-301.

Research output: Contribution to journalArticle

Tanaka, K, Fujii, Y, Atarashi, H, Akabori, KI, Hino, M & Nagamura, T 2008, 'Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films', Langmuir, vol. 24, no. 1, pp. 296-301. https://doi.org/10.1021/la702132t
Tanaka, Keiji ; Fujii, Yoshihisa ; Atarashi, Hironori ; Akabori, Kei Ichi ; Hino, Masahiro ; Nagamura, Toshihiko. / Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films. In: Langmuir. 2008 ; Vol. 24, No. 1. pp. 296-301.
@article{da59831b54054f49af84ae68295fc021,
title = "Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films",
abstract = "Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane, and methanol, which are {"}nonsolvents{"} for dPMMA, were examined along the direction normal to the interface by specular neutron reflectivity (NR). The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. To conserve mass, the swelling of the film by the nonsolvents is accompanied by an increase in the film thickness. The change in the film thickness estimated by NR was in excellent accord with the results of direct observations using atomic force microscopy (AFM). The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by AFM. The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.",
author = "Keiji Tanaka and Yoshihisa Fujii and Hironori Atarashi and Akabori, {Kei Ichi} and Masahiro Hino and Toshihiko Nagamura",
year = "2008",
month = "1",
day = "1",
doi = "10.1021/la702132t",
language = "English",
volume = "24",
pages = "296--301",
journal = "Langmuir",
issn = "0743-7463",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Nonsolvents cause swelling at the interface with poly(methyl methacrylate) films

AU - Tanaka, Keiji

AU - Fujii, Yoshihisa

AU - Atarashi, Hironori

AU - Akabori, Kei Ichi

AU - Hino, Masahiro

AU - Nagamura, Toshihiko

PY - 2008/1/1

Y1 - 2008/1/1

N2 - Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane, and methanol, which are "nonsolvents" for dPMMA, were examined along the direction normal to the interface by specular neutron reflectivity (NR). The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. To conserve mass, the swelling of the film by the nonsolvents is accompanied by an increase in the film thickness. The change in the film thickness estimated by NR was in excellent accord with the results of direct observations using atomic force microscopy (AFM). The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by AFM. The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.

AB - Density profiles of a perdeuterated poly(methyl methacrylate) (dPMMA) film spin-coated on a substrate in water, hexane, and methanol, which are "nonsolvents" for dPMMA, were examined along the direction normal to the interface by specular neutron reflectivity (NR). The interfaces of dPMMA with the liquids were diffuse in comparison with the pristine interface with air; the interfacial width with water was thicker than that with hexane. Interestingly, in water, the dPMMA film was composed of a swollen layer and the interior region, which also contained water, in addition to the diffused layer. The interface of dPMMA with hexane was sharper than that with water. Although there were slight indications of a swollen layer for the dPMMA in hexane, the solvent molecules did not penetrate significantly into the film. On the other hand, in methanol, the whole region of the dPMMA film was strikingly swollen. To conserve mass, the swelling of the film by the nonsolvents is accompanied by an increase in the film thickness. The change in the film thickness estimated by NR was in excellent accord with the results of direct observations using atomic force microscopy (AFM). The modulus of dPMMA in the vicinity of the interfaces with liquids was also examined on the basis of force-distance curves measured by AFM. The modulus decreased closer to the outermost region of the film. The extent to which the modulus decreased in the interfacial region was consistent with the amount of liquid sorbed into the film.

UR - http://www.scopus.com/inward/record.url?scp=38349171737&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=38349171737&partnerID=8YFLogxK

U2 - 10.1021/la702132t

DO - 10.1021/la702132t

M3 - Article

C2 - 18052221

AN - SCOPUS:38349171737

VL - 24

SP - 296

EP - 301

JO - Langmuir

JF - Langmuir

SN - 0743-7463

IS - 1

ER -