Nanoscale Damping Characteristics of Boron Nitride Nanotubes and Carbon Nanotubes Reinforced Polymer Composites

被引：87

作者：

Agrawal, Richa ^{[1
]}

Nieto, Andy ^{[1
]}

Chen, Han ^{[1
]}

Mora, Maria ^{[1
]}

Agarwal, Arvind ^{[1
]}

机构：

[1] Florida Int Univ, Nanomech & Nanotribol Lab, Dept Mech & Mat Engn, Miami, FL 33174 USA

来源：

ACS APPLIED MATERIALS & INTERFACES | 2013年 / 5卷 / 22期

关键词：

nano dynamic mechanical analysis (nanoDMA); damping; carbon nanotube; boron nitride nanotube; tan delta; ELASTIC-MODULUS; PLASMA; NANOCOMPOSITE;

D O I：

10.1021/am4038678

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

This study compares the damping behavior of boron nitride nanotubes (BNNTs) and carbon nanotubes (CNTs) as reinforcement in PLC, a biodegradable copolymer. The damping behavior of PLC composites reinforced with 2 wt% or 5 wt% nanotube filler is evaluated by nanodynamic mechanical analysis (NanoDMA). The addition of 2 wt% CNT leads to the greatest enhancement in damping (tan delta) behavior. This is attributed to pullout in CNTs because of lower interfacial shear strength with the polymer matrix and a more effective sword-in-sheath mechanism as opposed to BNNTs which have bamboo-like nodes. BNNTs however have a superior distribution in the PLC polymer matrix enabling higher contents of BNNT to further enhance the damping behavior. This is in contrast with CNTs which agglomerate at higher concentrations, thus preventing further improvement at higher concentrations. It is observed that for different compositions, tan values show no significant changes over varying dynamic loads or prolonged cycles. This shows the ability of nanotube mechanisms to function at varying strain rates and to survive long cycles.

引用

页码：12052 / 12057

页数：6

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