Preparation of poly(amic acid) nanoparticles using the reprecipitation method and their imidization

Masao Suzuki; Hitoshi Kasai; Hirohiko Miura; Shuji Okada; Hidetoshi Oikawa; Takayasu Nihira; Hiroyoshi Fukuro; Hachiro Nakanishi

doi:10.1295/koron.59.637

Preparation of poly(amic acid) nanoparticles using the reprecipitation method and their imidization

Masao Suzuki, Hitoshi Kasai, Hirohiko Miura, Shuji Okada, Hidetoshi Oikawa, Takayasu Nihira, Hiroyoshi Fukuro, Hachiro Nakanishi

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

5 Citations (Scopus)

Abstract

We have successfully fabricated polyimide (PI) nanoparticles through chemical imidization of poly(amic acid) (PAA) precursor nanoparticles, which were prepared by the reprecipitation method. PAA used as a precursor polymer was produced by polyaddition of 4,4′-oxydianiline and 4,4′ -(2,2-hexafluoroisopropylidene) diphthalic anhydride in N-methyl-2-pyrrolidinone. Chemical imidization of PAA nanoparticle was performed by adding a small amount of pyridine/acetic anhydride mixture (1:1) into the PAA nanoparticle dispersion. Almost quantitative conversion from PAA to PI was confirmed by IR spectra. According to SEM observations, both PAA and the corresponding PI nanoparticles were spherical. The particle size distribution was found by DLS measurements to be unchanged before and after the chemical imidization.

Original language	English
Pages (from-to)	637-641
Number of pages	5
Journal	KOBUNSHI RONBUNSHU
Volume	59
Issue number	10
DOIs	https://doi.org/10.1295/koron.59.637
Publication status	Published - 2002

Keywords

Chemical imidization
Nanoparticles
Poly(amic acid)
Polyimide
Reprecipitation method

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Materials Science (miscellaneous)
Environmental Science(all)
Polymers and Plastics

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title = "Preparation of poly(amic acid) nanoparticles using the reprecipitation method and their imidization",

abstract = "We have successfully fabricated polyimide (PI) nanoparticles through chemical imidization of poly(amic acid) (PAA) precursor nanoparticles, which were prepared by the reprecipitation method. PAA used as a precursor polymer was produced by polyaddition of 4,4′-oxydianiline and 4,4′ -(2,2-hexafluoroisopropylidene) diphthalic anhydride in N-methyl-2-pyrrolidinone. Chemical imidization of PAA nanoparticle was performed by adding a small amount of pyridine/acetic anhydride mixture (1:1) into the PAA nanoparticle dispersion. Almost quantitative conversion from PAA to PI was confirmed by IR spectra. According to SEM observations, both PAA and the corresponding PI nanoparticles were spherical. The particle size distribution was found by DLS measurements to be unchanged before and after the chemical imidization.",

keywords = "Chemical imidization, Nanoparticles, Poly(amic acid), Polyimide, Reprecipitation method",

author = "Masao Suzuki and Hitoshi Kasai and Hirohiko Miura and Shuji Okada and Hidetoshi Oikawa and Takayasu Nihira and Hiroyoshi Fukuro and Hachiro Nakanishi",

year = "2002",

doi = "10.1295/koron.59.637",

language = "English",

volume = "59",

pages = "637--641",

journal = "Kobunshi Ronbunshu",

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T1 - Preparation of poly(amic acid) nanoparticles using the reprecipitation method and their imidization

AU - Suzuki, Masao

AU - Kasai, Hitoshi

AU - Miura, Hirohiko

AU - Okada, Shuji

AU - Oikawa, Hidetoshi

AU - Nihira, Takayasu

AU - Fukuro, Hiroyoshi

AU - Nakanishi, Hachiro

PY - 2002

Y1 - 2002

N2 - We have successfully fabricated polyimide (PI) nanoparticles through chemical imidization of poly(amic acid) (PAA) precursor nanoparticles, which were prepared by the reprecipitation method. PAA used as a precursor polymer was produced by polyaddition of 4,4′-oxydianiline and 4,4′ -(2,2-hexafluoroisopropylidene) diphthalic anhydride in N-methyl-2-pyrrolidinone. Chemical imidization of PAA nanoparticle was performed by adding a small amount of pyridine/acetic anhydride mixture (1:1) into the PAA nanoparticle dispersion. Almost quantitative conversion from PAA to PI was confirmed by IR spectra. According to SEM observations, both PAA and the corresponding PI nanoparticles were spherical. The particle size distribution was found by DLS measurements to be unchanged before and after the chemical imidization.

AB - We have successfully fabricated polyimide (PI) nanoparticles through chemical imidization of poly(amic acid) (PAA) precursor nanoparticles, which were prepared by the reprecipitation method. PAA used as a precursor polymer was produced by polyaddition of 4,4′-oxydianiline and 4,4′ -(2,2-hexafluoroisopropylidene) diphthalic anhydride in N-methyl-2-pyrrolidinone. Chemical imidization of PAA nanoparticle was performed by adding a small amount of pyridine/acetic anhydride mixture (1:1) into the PAA nanoparticle dispersion. Almost quantitative conversion from PAA to PI was confirmed by IR spectra. According to SEM observations, both PAA and the corresponding PI nanoparticles were spherical. The particle size distribution was found by DLS measurements to be unchanged before and after the chemical imidization.

KW - Chemical imidization

KW - Nanoparticles

KW - Poly(amic acid)

KW - Polyimide

KW - Reprecipitation method

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DO - 10.1295/koron.59.637

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SP - 637

EP - 641

JO - Kobunshi Ronbunshu

JF - Kobunshi Ronbunshu

SN - 0386-2186

IS - 10

ER -

Preparation of poly(amic acid) nanoparticles using the reprecipitation method and their imidization

Abstract

Keywords

ASJC Scopus subject areas

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