Effect of carbon nanotube length on the piezoresistive response of poly (methyl methacrylate) nanocomposites

被引：25

作者：

Aviles, F. ^{[1
]}

Oliva, A. I. ^{[2
]}

Ventura, G. ^{[1
]}

May-Pat, A. ^{[1
]}

Oliva-Aviles, A. I. ^{[3
]}

机构：

[1] Ctr Invest Cient Yucatan AC, Unidad Mat, Calle 43 130 X 32 & 34, Merida 97205, Yucatan, Mexico

[2] IPN, Ctr Invest & Estudios Avanzados, Unidad Merida, Dept Fis Aplicada, Km 6 Antigua Carretera Progreso,AP 73 Cordemex, Merida 97310, Yucatan, Mexico

[3] Univ Anahuac Mayah, Div Ingn & Ciencias Exactas, Carretera Merida Progreso Km 15-5 AP 96 Cordemex, Merida 97310, Yucatan, Mexico

来源：

EUROPEAN POLYMER JOURNAL | 2019年 / 110卷

关键词：

Nanocomposites; Carbon nanotubes; Piezoresistivity; Ultrasonic energy; PMMA; ELECTRICAL-CONDUCTIVITY; STRAIN SENSOR; ASPECT-RATIO; COMPOSITE; BEHAVIOR; PERCOLATION; MECHANISMS; DISPERSION; STRENGTH; FILMS;

D O I：

10.1016/j.eurpolymj.2018.12.002

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Multiwall carbon nanotubes (MWCNTs) were systematically fragmented using high density ultrasonic energy and used as fillers of a poly (methyl methacrylate) matrix (PMMA). MWCNT fragmentation was confirmed by scanning electron microscopy and atomic force microscopy. Dedicated MWCNT length measurements yielded a log-normal statistical distribution, with mean value of 1.33 gm for the as-received MWCNTs and 0.66 mu m for the fragmented MWCNTs. Higher electrical percolation threshold and lower electrical conductivity were obtained for MWCNT/PMMA composites (0.01-1 wt.% MWCNT concentration) using the fragmented MWCNTs. Higher electro-mechanical (piezoresistive) sensitivity under tensile tests was measured for PMMA nanocomposites with fragmented MWCNTs, which was explained by a competition of mechanisms related to the MWCNT length.

引用

页码：394 / 402

页数：9

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