Surface modification of engineering plastics through swelling in supercritical carbon dioxide

Toshimi Takajo, Atsushi Takahara, Takefumi Kichikawa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In order to improve the tribological characteristics of polymer materials, the authors tried to impregnate the surface of engineering plastics with the lubricating oil by using supercritical carbon dioxide. The oil impregnation ratio on crystalline polymer was influenced by both the glass transition temperature (Tg) and the degree of crystallinity. In case of using the polymer possessing lower Tg with large difference between the Tg and treatment temperature, the higher impregnation ratio was obtained, and the crystallite in crystalline polymer prevented the impregnation of lubricating oil. The results of polarized optical microscopic observations and FT-IR spectroscopy studies indicated that the lubricating oil was preferentially impregnated to the amorphous region in crystalline polymer, and the high-concentration layer of lubricating oil having the thickness of ca. 30 um was formed at the vicinity of surface area. The result obtained in this study, which reports the preferential lubricating oil impregnation to the surface of crystalline polymer under supercritical carbon dioxide, suggests that the tribological characteristics of crystalline polymer would be improved by applying this oil impregnation method without sacrificing the bulk mechanical strength.

Original languageEnglish
Pages (from-to)716-724
Number of pages9
JournalPolymer Journal
Volume40
Issue number8
DOIs
Publication statusPublished - Oct 20 2008

Fingerprint

Carbon Dioxide
Swelling
Surface treatment
Carbon dioxide
Polymers
Lubricating oils
Impregnation
Plastics
Crystalline materials
Oils
Strength of materials
Infrared spectroscopy

All Science Journal Classification (ASJC) codes

  • Polymers and Plastics
  • Materials Chemistry

Cite this

Surface modification of engineering plastics through swelling in supercritical carbon dioxide. / Takajo, Toshimi; Takahara, Atsushi; Kichikawa, Takefumi.

In: Polymer Journal, Vol. 40, No. 8, 20.10.2008, p. 716-724.

Research output: Contribution to journalArticle

@article{09b4f9dd8deb479da42481ab48b6c457,
title = "Surface modification of engineering plastics through swelling in supercritical carbon dioxide",
abstract = "In order to improve the tribological characteristics of polymer materials, the authors tried to impregnate the surface of engineering plastics with the lubricating oil by using supercritical carbon dioxide. The oil impregnation ratio on crystalline polymer was influenced by both the glass transition temperature (Tg) and the degree of crystallinity. In case of using the polymer possessing lower Tg with large difference between the Tg and treatment temperature, the higher impregnation ratio was obtained, and the crystallite in crystalline polymer prevented the impregnation of lubricating oil. The results of polarized optical microscopic observations and FT-IR spectroscopy studies indicated that the lubricating oil was preferentially impregnated to the amorphous region in crystalline polymer, and the high-concentration layer of lubricating oil having the thickness of ca. 30 um was formed at the vicinity of surface area. The result obtained in this study, which reports the preferential lubricating oil impregnation to the surface of crystalline polymer under supercritical carbon dioxide, suggests that the tribological characteristics of crystalline polymer would be improved by applying this oil impregnation method without sacrificing the bulk mechanical strength.",
author = "Toshimi Takajo and Atsushi Takahara and Takefumi Kichikawa",
year = "2008",
month = "10",
day = "20",
doi = "10.1295/polymj.PJ2007212",
language = "English",
volume = "40",
pages = "716--724",
journal = "Polymer Journal",
issn = "0032-3896",
publisher = "Nature Publishing Group",
number = "8",

}

TY - JOUR

T1 - Surface modification of engineering plastics through swelling in supercritical carbon dioxide

AU - Takajo, Toshimi

AU - Takahara, Atsushi

AU - Kichikawa, Takefumi

PY - 2008/10/20

Y1 - 2008/10/20

N2 - In order to improve the tribological characteristics of polymer materials, the authors tried to impregnate the surface of engineering plastics with the lubricating oil by using supercritical carbon dioxide. The oil impregnation ratio on crystalline polymer was influenced by both the glass transition temperature (Tg) and the degree of crystallinity. In case of using the polymer possessing lower Tg with large difference between the Tg and treatment temperature, the higher impregnation ratio was obtained, and the crystallite in crystalline polymer prevented the impregnation of lubricating oil. The results of polarized optical microscopic observations and FT-IR spectroscopy studies indicated that the lubricating oil was preferentially impregnated to the amorphous region in crystalline polymer, and the high-concentration layer of lubricating oil having the thickness of ca. 30 um was formed at the vicinity of surface area. The result obtained in this study, which reports the preferential lubricating oil impregnation to the surface of crystalline polymer under supercritical carbon dioxide, suggests that the tribological characteristics of crystalline polymer would be improved by applying this oil impregnation method without sacrificing the bulk mechanical strength.

AB - In order to improve the tribological characteristics of polymer materials, the authors tried to impregnate the surface of engineering plastics with the lubricating oil by using supercritical carbon dioxide. The oil impregnation ratio on crystalline polymer was influenced by both the glass transition temperature (Tg) and the degree of crystallinity. In case of using the polymer possessing lower Tg with large difference between the Tg and treatment temperature, the higher impregnation ratio was obtained, and the crystallite in crystalline polymer prevented the impregnation of lubricating oil. The results of polarized optical microscopic observations and FT-IR spectroscopy studies indicated that the lubricating oil was preferentially impregnated to the amorphous region in crystalline polymer, and the high-concentration layer of lubricating oil having the thickness of ca. 30 um was formed at the vicinity of surface area. The result obtained in this study, which reports the preferential lubricating oil impregnation to the surface of crystalline polymer under supercritical carbon dioxide, suggests that the tribological characteristics of crystalline polymer would be improved by applying this oil impregnation method without sacrificing the bulk mechanical strength.

UR - http://www.scopus.com/inward/record.url?scp=53849085529&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=53849085529&partnerID=8YFLogxK

U2 - 10.1295/polymj.PJ2007212

DO - 10.1295/polymj.PJ2007212

M3 - Article

VL - 40

SP - 716

EP - 724

JO - Polymer Journal

JF - Polymer Journal

SN - 0032-3896

IS - 8

ER -