Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymer matrix composites

Hai-Ping Xu; Zhi-Min Dang; Dong-Hai Shi; Jin-Bo Bai

doi:10.1039/B717591D

Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymermatrix composites

Hai-Ping Xu,^a Zhi-Min Dang,*^a Dong-Hai Shi^a and Jin-Bo Bai^b

* Corresponding authors

^a Key Lab for Nanomaterials, Ministry of Education, Key Lab of Beijing City for Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing, People's Republic of China
E-mail: dangzm@mail.buct.edu.cn

^b Lab. MSSMAT, CNRS UMR 8579, Ecole Centrale de Paris, Grande Voie des Vignes, Châtenay Malabry Cedex, France

Abstract

Academic and industrial research groups are currently working on materials with high-quality positive temperature coefficient (PTC) effects. They are crucial for designing new switching sensors, self-regulating heaters and shielding structures. Such materials are in fact the basis for a new generation of cheap and large sensors. Here we present a robust and simple procedure to prepare binary-polymer matrix composites with strong PTC effect through melt-mixing and subsequent hot-pressing technology. The intuitive and detailed double-percolation structure is observed on the basis of morphological evidence. Modified nanoscaled carbon black (MNCB) is often selectively localized in one of the binary-polymer phases. When the volume ratio of the two polymers is very close to 1 : 1, we observe remarkable PTC intensity (PTCI), namely PTCI = 3.3 × 10⁷ in MNCB-high density polyethylene/polypropylene (MNCB-HDPE/PP) and PTCI = 8.3 × 10⁷ in MNCB-HDPE/polyvinylidene fluoride (MNCB-HDPE/PVDF). The process for the preparation of these binary-polymer matrix PTC composites is suitable for industrial mass production.

Article information

https://doi.org/10.1039/B717591D

Article type

Paper

Submitted

14 Nov 2007

Accepted

18 Mar 2008

First published

15 Apr 2008

Download Citation

J. Mater. Chem., 2008,18, 2685-2690

Permissions

Request permissions

Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymer matrix composites

H. Xu, Z. Dang, D. Shi and J. Bai, J. Mater. Chem., 2008, 18, 2685 DOI: 10.1039/B717591D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Journal of Materials Chemistry

Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymermatrix composites

Abstract

Article information

Download Citation

Permissions

Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymer matrix composites

Search articles by author

Spotlight

Advertisements