Carbon nanotube surface chemistry and its effects on interfacial nanomechanics

2004 ◽  
Vol 858 ◽  
Author(s):  
Asa H. Barber ◽  
Sidney R. Cohen ◽  
H. Daniel
Keyword(s):  
Carbon Nanotube ◽  
Surface Chemistry ◽  
Adhesion Strength ◽  
Polymer Matrix ◽  
Interfacial Adhesion ◽  
Epoxy Polymer ◽  
Interfacial Strength ◽  
Interfacial Mechanics ◽  
Polymer Interface ◽  
Multi Walled Carbon Nanotube

ABSTRACTIndividual multi-walled carbon nanotube pullout experiments were used to measure the adhesion strength at a nanotube-epoxy polymer interface. The interfacial strength was found, as expected, to increase when the nanotubes were chemically treated to induce strong bonding with the polymer matrix. At long nanotube embedment lengths within the polymer, the nanotubes were seen to fracture in preference to failure at their interface with the polymer. Interfacial mechanics models are applied to the data to describe interfacial adhesion at the nano-level.

Synthesis and Characterization of Poly(2,5-benzimidazole) (ABPBI) Grafted Carbon Nanotubes

2009 ◽  
Vol 1240 ◽  
Author(s):  
Ji-Ye Kang ◽  
Su-Mi Eo ◽  
Loon-Seng Tan ◽  
Jong-Beom Baek
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Interfacial Adhesion ◽  
Synthesis And Characterization ◽  
Acylation Reaction ◽  
Single Walled Carbon Nanotube ◽  
Mechanical And Electrical Properties ◽  
Multi Walled Carbon Nanotube

AbstractSingle-walled carbon nanotube (SWCNT) and multi-walled carbon nanotube (MWCNT) were functionalized with 3,4-diaminobenzoic acid via “direct” Friedel-Crafts acylation reaction in PPA/P2O5 to afford ortho-diamino-functionalized SWCNT (DIF-SWCNT) and MWCNT (DIF-MWCNT). The resultant DIF-SWCNT and DIF-MWCNT showed improved solubility and dispersibility. To improve interfacial adhesion between CNT and polymer matrix, the grafting of ABPBI onto the surface of DIF-SWCNT (10 wt%) or DIF-MWCNT (10 wt%) was conducted by simple in-situ polymerization of AB monomer, 3,4-diaminobenzoic acid dihydrochloride, in PPA. The resultant ABPBI-g-MWCNT and ABPBI-g-SWCNT showed improved the mechanical and electrical properties.

UV-Irradiation Effects on Interfacial Strength between Thin Ceramic Film and Polymer Substrate

2005 ◽  
Vol 297-300 ◽  
pp. 2284-2289 ◽  
Author(s):  
Masaki Omiya ◽  
Hirotsugu Inoue ◽  
Kikuo Kishimoto ◽  
Masaaki Yanaka ◽  
Noritaka Ihashi
Keyword(s):  
Adhesion Strength ◽  
Uv Irradiation ◽  
Interfacial Adhesion ◽  
Interfacial Strength ◽  
Ultra Violet ◽  
Peel Test ◽  
Polymeric Materials ◽  
Polymer Substrate ◽  
Ceramic Films ◽  
Interfacial Adhesion Strength

This aim of this study is to investigate the effect of UV (Ultra Violet ray) irradiation on the interfacial adhesion strength between thin ceramic films and polymer substrate. Electric conductive films based on polymer substrates have attracted attention for use in flexible optoelectronic devices. It is well known that the mechanical properties of polymeric materials are degraded by UV irradiation. Therefore, it is considered that the UV irradiation also affects the interfacial adhesion strength between ceramic coating and polymer substrate. The interfacial adhesion strength was measured by Multi-stages peel test. The results show that the interfacial strength decreases with UV irradiation. However, if a filter layer is installed between ceramic and polymer substrate, the degradation ratio becomes small.

Local current mapping of single vertically aligned multi-walled carbon nanotube in a polymer matrix

2012 ◽  
Vol 112 (8) ◽  
pp. 084327 ◽  
Author(s):  
C. Villeneuve ◽  
S. Pacchini ◽  
P. Boulanger ◽  
A. Brouzes ◽  
F. Roussel ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Matrix ◽  
Multi Walled Carbon Nanotube ◽  
Local Current ◽  
Vertically Aligned

Estimating the Cohesive Zone Model Parameters of Carbon Nanotube–Polymer Interface for Machining Simulations

2014 ◽  
Vol 136 (3) ◽  
Author(s):  
Lingyun Jiang ◽  
Chandra Nath ◽  
Johnson Samuel ◽  
Shiv G. Kapoor
Keyword(s):  
Carbon Nanotube ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Interfacial Strength ◽  
Weight Fraction ◽  
Model Parameters ◽  
Zone Model ◽  
Fe Model ◽  
Polymer Interface ◽  
Two Parameters

The failure mechanisms encountered during the machining of carbon nanotube (CNT) polymer composites are primarily governed by the strength of the CNT–polymer interface. Therefore, the interface should be explicitly modeled in microstructure-level machining simulations for these composites. One way of effectively capturing the behavior of this interface is by the use of a cohesive zone model (CZM) that is characterized by two parameters, viz., interfacial strength and interfacial fracture energy. The objective of this study is to estimate these two CZM parameters of the interface using an inverse iterative finite element (FE) approach. A microstructure-level 3D FE model for nanoindentation simulation has been developed where the composite microstructure is modeled using three distinct phases, viz., the CNT, the polymer, and the interface. The unknown CZM parameters of the interface are then determined by minimizing the root mean square (RMS) error between the simulated and the experimental nanoindentation load–displacement curves for a 2 wt. % CNT–polyvinyl alcohol (PVA) composite sample at room temperature and quasi-static strain state of up to 0.04 s−1, and then validated using the 1 wt. % and 4 wt. % CNT–PVA composites. The results indicate that for well-dispersed and aligned CNT–PVA composites, the CZM parameters of the interface are independent of the CNT loading in the weight fraction range of 1–4%.

Inclined slit-based pullout method for determining interfacial strength of multi-walled carbon nanotube–alumina composites

Carbon ◽  
2014 ◽  
Vol 78 ◽  
pp. 439-445 ◽  
Author(s):  
Yo Nozaka ◽  
Weili Wang ◽  
Keiichi Shirasu ◽  
Go Yamamoto ◽  
Toshiyuki Hashida
Keyword(s):  
Carbon Nanotube ◽  
Interfacial Strength ◽  
Multi Walled Carbon Nanotube ◽  
Alumina Composites

Rate-dependent and self-healing conductive shear stiffening nanocomposite: a novel safe-guarding material with force sensitivity

2015 ◽  
Vol 3 (39) ◽  
pp. 19790-19799 ◽  
Author(s):  
Sheng Wang ◽  
Shouhu Xuan ◽  
Wanquan Jiang ◽  
Weifeng Jiang ◽  
Lixun Yan ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Polymer Matrix ◽  
Self Healing ◽  
Conductive Composite ◽  
Rate Dependent ◽  
Force Sensitivity ◽  
Multi Walled Carbon Nanotube

A novel rate-dependent and self-healing conductive composite with well defined shear stiffening (S-ST) effect was facilely fabricated by dispersing the multi-walled carbon nanotube (MWCNT) into a shear stiffening polymer matrix.

Estimating the Cohesive Zone Model Parameters for Carbon Nanotube–Polymer Interface Using Inverse Finite Element Approach

2012 ◽  
Author(s):  
Lingyun Jiang ◽  
Chandra Nath ◽  
Johnson Samuel ◽  
Shiv G. Kapoor
Keyword(s):  
Finite Element ◽  
Carbon Nanotube ◽  
Fracture Energy ◽  
Cohesive Zone ◽  
Cohesive Zone Model ◽  
Interfacial Strength ◽  
Model Parameters ◽  
Zone Model ◽  
Displacement Curve ◽  
Polymer Interface

During machining of carbon nanotube (CNT)-polymer composites, the failure of the polymer elements occurs at the CNT-polymer interface. The interfacial behavior that can be represented by a cohesive zone model (CZM) is mainly influenced by two parameters, viz., interfacial strength and fracture energy. The objective of this study is to estimate these two specific CZM parameters using an inverse finite element (FE) simulation approach that works based on an iterative error minimization procedure. Nanoindentation tests have been conducted on a CNT-polyvinyl alcohol (PVA) composite sample containing 4 wt% multi-walled nanotubes (MWNTs). A 2D axisymmetric FE model of nanoindentation has been developed. This micro-structure based model considers the CNT, the PVA, and the cohesive zone of interface as three individual phases. The unknown interfacial parameters are determined by minimizing the error between the simulation load-displacement curve and the experimental results. The interfacial strength and the fracture energy at the CNT-PVA interface are estimated to be approximately 40 MPa and 16e−3 J/m2, respectively. This approach provides a convenient framework to understand the role of the CZM parameters at the interface between the CNT and polymer matrix.

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