Preparation and characterization of polycarbonate nanocomposites based on surface-modified halloysite nanotubes

Hui Jing; Yuji Higaki; Wei Ma; Jiang Xi; Hiroshi Jinnai; Hideyuki Otsuka; Atsushi Takahara

doi:10.1038/pj.2013.100

Preparation and characterization of polycarbonate nanocomposites based on surface-modified halloysite nanotubes

Hui Jing, Yuji Higaki, Wei Ma, Jiang Xi, Hiroshi Jinnai, Hideyuki Otsuka, Atsushi Takahara

IMRAM - Division of Measurements

Kyushu University

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

21 Citations (Scopus)

Abstract

Halloysite nanotubes (HNTs) modified by a chemical vapor adsorption (CVA) process remarkably improve the thermal stability of polycarbonate nanocomposites. HNTs were modified with N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (AEAPS) and n-octadecyltrimethoxysilane (OTMS) using a CVA process. Both Fourier-transform infrared spectroscopy and thermogravimetric analysis showed that the modifiers were immobilized on the HNT surfaces. Polycarbonate (PC)/HNT nanocomposites were prepared with the modified HNTs by a combination of solution mixing, precipitating and compression molding. The dispersion states of modified HNTs in PC nanocomposites were observed by optical microscopy, scanning electron microscopy and transmission electron microscopy. The storage modulus (E′) and thermal stability of the PC nanocomposites were enhanced by the modified HNTs. OTMS-modified HNT/PC nanocomposites showed higher performance than AEAPS-modified HNT/PC nanocomposites due to the stronger affinity of the hydrophobic alkyl groups of OTMS for the polymer matrix.

Original language	English
Pages (from-to)	307-312
Number of pages	6
Journal	Polymer Journal
Volume	46
Issue number	5
DOIs	https://doi.org/10.1038/pj.2013.100
Publication status	Published - 2014 May

Keywords

clay nanocomposites
glass transition temperature
halloysite nanotubes
polycarbonate
thermal stability

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10.1038/pj.2013.100

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title = "Preparation and characterization of polycarbonate nanocomposites based on surface-modified halloysite nanotubes",

abstract = "Halloysite nanotubes (HNTs) modified by a chemical vapor adsorption (CVA) process remarkably improve the thermal stability of polycarbonate nanocomposites. HNTs were modified with N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (AEAPS) and n-octadecyltrimethoxysilane (OTMS) using a CVA process. Both Fourier-transform infrared spectroscopy and thermogravimetric analysis showed that the modifiers were immobilized on the HNT surfaces. Polycarbonate (PC)/HNT nanocomposites were prepared with the modified HNTs by a combination of solution mixing, precipitating and compression molding. The dispersion states of modified HNTs in PC nanocomposites were observed by optical microscopy, scanning electron microscopy and transmission electron microscopy. The storage modulus (E′) and thermal stability of the PC nanocomposites were enhanced by the modified HNTs. OTMS-modified HNT/PC nanocomposites showed higher performance than AEAPS-modified HNT/PC nanocomposites due to the stronger affinity of the hydrophobic alkyl groups of OTMS for the polymer matrix.",

keywords = "clay nanocomposites, glass transition temperature, halloysite nanotubes, polycarbonate, thermal stability",

author = "Hui Jing and Yuji Higaki and Wei Ma and Jiang Xi and Hiroshi Jinnai and Hideyuki Otsuka and Atsushi Takahara",

note = "Funding Information: We thank Ms Yoshiko Tsuchiya for transmission electron microscopy sample preparation. The authors acknowledge the financial support of a Grant-in-Aid for Scientific Research (A) (No. 19205031) from Japan Society for the Promotion of Science. The present work is also supported by a Grant-in-Aid for GCOE Program, {\textquoteleft}Science for Future Molecular Systems,{\textquoteright} from the Ministry of Education, Culture, Science, Sports and Technology (MEXT) of Japan. The authors thank Applied Minerals Inc. for the HNT supply.",

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doi = "10.1038/pj.2013.100",

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AU - Jing, Hui

AU - Higaki, Yuji

AU - Ma, Wei

AU - Xi, Jiang

AU - Jinnai, Hiroshi

AU - Otsuka, Hideyuki

AU - Takahara, Atsushi

N1 - Funding Information: We thank Ms Yoshiko Tsuchiya for transmission electron microscopy sample preparation. The authors acknowledge the financial support of a Grant-in-Aid for Scientific Research (A) (No. 19205031) from Japan Society for the Promotion of Science. The present work is also supported by a Grant-in-Aid for GCOE Program, ‘Science for Future Molecular Systems,’ from the Ministry of Education, Culture, Science, Sports and Technology (MEXT) of Japan. The authors thank Applied Minerals Inc. for the HNT supply.

PY - 2014/5

Y1 - 2014/5

N2 - Halloysite nanotubes (HNTs) modified by a chemical vapor adsorption (CVA) process remarkably improve the thermal stability of polycarbonate nanocomposites. HNTs were modified with N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (AEAPS) and n-octadecyltrimethoxysilane (OTMS) using a CVA process. Both Fourier-transform infrared spectroscopy and thermogravimetric analysis showed that the modifiers were immobilized on the HNT surfaces. Polycarbonate (PC)/HNT nanocomposites were prepared with the modified HNTs by a combination of solution mixing, precipitating and compression molding. The dispersion states of modified HNTs in PC nanocomposites were observed by optical microscopy, scanning electron microscopy and transmission electron microscopy. The storage modulus (E′) and thermal stability of the PC nanocomposites were enhanced by the modified HNTs. OTMS-modified HNT/PC nanocomposites showed higher performance than AEAPS-modified HNT/PC nanocomposites due to the stronger affinity of the hydrophobic alkyl groups of OTMS for the polymer matrix.

AB - Halloysite nanotubes (HNTs) modified by a chemical vapor adsorption (CVA) process remarkably improve the thermal stability of polycarbonate nanocomposites. HNTs were modified with N-(2-aminoethyl)-3- aminopropyltrimethoxysilane (AEAPS) and n-octadecyltrimethoxysilane (OTMS) using a CVA process. Both Fourier-transform infrared spectroscopy and thermogravimetric analysis showed that the modifiers were immobilized on the HNT surfaces. Polycarbonate (PC)/HNT nanocomposites were prepared with the modified HNTs by a combination of solution mixing, precipitating and compression molding. The dispersion states of modified HNTs in PC nanocomposites were observed by optical microscopy, scanning electron microscopy and transmission electron microscopy. The storage modulus (E′) and thermal stability of the PC nanocomposites were enhanced by the modified HNTs. OTMS-modified HNT/PC nanocomposites showed higher performance than AEAPS-modified HNT/PC nanocomposites due to the stronger affinity of the hydrophobic alkyl groups of OTMS for the polymer matrix.

KW - clay nanocomposites

KW - glass transition temperature

KW - halloysite nanotubes

KW - polycarbonate

KW - thermal stability

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Preparation and characterization of polycarbonate nanocomposites based on surface-modified halloysite nanotubes

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