Thermomechanical characterization of nanoreinforced composites

A. Sharma, J. E. Schober, Charles E. Bakis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

The objective of this investigation is to characterize the thermomechanical behavior of nanoreinforced epoxy. The resin employed in this investigation is a bisphenol F epoxide with a diamine curing agent. The nanofillers are single walled carbon nanotubes and vapor grown carbon nanofibers. The objective of the tests carried out with nanotube reinforced epoxies is to assess the effects of chemical functionalization on the behavior, whereas the objective of the tests with nanofibers is to assess the effects of mass fraction of reinforcement on behavior. Some of the nanotubes were functionalized with amine groups to improve chemical bonding with epoxy. Nanofiber mass fractions varied from 0.5 to 10%. Processing methods employed an air-release agent, surfactant, and high frequency sonic agitation, which resulted in good dispersion of the nanofibers and nanotubes. The types of thermomechanical properties evaluated were glass transition temperature (Tg), coefficient of thermal expansion (CTE), and tensile creep behavior. The composite containing amine-functionalized nanotubes showed an increase of 10°C in Tg, and a 3/°C decrease in CTE. Use of functionalized nanotubes did not increase the creep resistance of epoxy as expected. It was found that, as nanofiber content increased from 0 to 10%, the Tg of the composites decreased by 12°C, the CTE remained roughly constant, and the creep compliance decreased by about 50%.

Original languageEnglish (US)
Title of host publication20th Technical Conference of the American Society for Composites 2005
Pages790-803
Number of pages14
StatePublished - Dec 1 2005
Event20th Technical Conference of the American Society for Composites 2005 - Philadelphia, PA, United States
Duration: Sep 7 2005Sep 9 2005

Publication series

Name20th Technical Conference of the American Society for Composites 2005
Volume2

Other

Other20th Technical Conference of the American Society for Composites 2005
CountryUnited States
CityPhiladelphia, PA
Period9/7/059/9/05

Fingerprint

Nanotubes
Nanofibers
Composite materials
Thermal expansion
Amines
Creep
Creep resistance
Carbon nanofibers
Diamines
Epoxy Compounds
Single-walled carbon nanotubes (SWCN)
Surface-Active Agents
Curing
Reinforcement
Surface active agents
Resins
Vapors
Processing
Air

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Cite this

Sharma, A., Schober, J. E., & Bakis, C. E. (2005). Thermomechanical characterization of nanoreinforced composites. In 20th Technical Conference of the American Society for Composites 2005 (pp. 790-803). (20th Technical Conference of the American Society for Composites 2005; Vol. 2).
Sharma, A. ; Schober, J. E. ; Bakis, Charles E. / Thermomechanical characterization of nanoreinforced composites. 20th Technical Conference of the American Society for Composites 2005. 2005. pp. 790-803 (20th Technical Conference of the American Society for Composites 2005).
@inproceedings{6a195007f28f464581cf17c87b53dfb2,
title = "Thermomechanical characterization of nanoreinforced composites",
abstract = "The objective of this investigation is to characterize the thermomechanical behavior of nanoreinforced epoxy. The resin employed in this investigation is a bisphenol F epoxide with a diamine curing agent. The nanofillers are single walled carbon nanotubes and vapor grown carbon nanofibers. The objective of the tests carried out with nanotube reinforced epoxies is to assess the effects of chemical functionalization on the behavior, whereas the objective of the tests with nanofibers is to assess the effects of mass fraction of reinforcement on behavior. Some of the nanotubes were functionalized with amine groups to improve chemical bonding with epoxy. Nanofiber mass fractions varied from 0.5 to 10{\%}. Processing methods employed an air-release agent, surfactant, and high frequency sonic agitation, which resulted in good dispersion of the nanofibers and nanotubes. The types of thermomechanical properties evaluated were glass transition temperature (Tg), coefficient of thermal expansion (CTE), and tensile creep behavior. The composite containing amine-functionalized nanotubes showed an increase of 10°C in Tg, and a 3/°C decrease in CTE. Use of functionalized nanotubes did not increase the creep resistance of epoxy as expected. It was found that, as nanofiber content increased from 0 to 10{\%}, the Tg of the composites decreased by 12°C, the CTE remained roughly constant, and the creep compliance decreased by about 50{\%}.",
author = "A. Sharma and Schober, {J. E.} and Bakis, {Charles E.}",
year = "2005",
month = "12",
day = "1",
language = "English (US)",
isbn = "9781622762828",
series = "20th Technical Conference of the American Society for Composites 2005",
pages = "790--803",
booktitle = "20th Technical Conference of the American Society for Composites 2005",

}

Sharma, A, Schober, JE & Bakis, CE 2005, Thermomechanical characterization of nanoreinforced composites. in 20th Technical Conference of the American Society for Composites 2005. 20th Technical Conference of the American Society for Composites 2005, vol. 2, pp. 790-803, 20th Technical Conference of the American Society for Composites 2005, Philadelphia, PA, United States, 9/7/05.

Thermomechanical characterization of nanoreinforced composites. / Sharma, A.; Schober, J. E.; Bakis, Charles E.

20th Technical Conference of the American Society for Composites 2005. 2005. p. 790-803 (20th Technical Conference of the American Society for Composites 2005; Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - Thermomechanical characterization of nanoreinforced composites

AU - Sharma, A.

AU - Schober, J. E.

AU - Bakis, Charles E.

PY - 2005/12/1

Y1 - 2005/12/1

N2 - The objective of this investigation is to characterize the thermomechanical behavior of nanoreinforced epoxy. The resin employed in this investigation is a bisphenol F epoxide with a diamine curing agent. The nanofillers are single walled carbon nanotubes and vapor grown carbon nanofibers. The objective of the tests carried out with nanotube reinforced epoxies is to assess the effects of chemical functionalization on the behavior, whereas the objective of the tests with nanofibers is to assess the effects of mass fraction of reinforcement on behavior. Some of the nanotubes were functionalized with amine groups to improve chemical bonding with epoxy. Nanofiber mass fractions varied from 0.5 to 10%. Processing methods employed an air-release agent, surfactant, and high frequency sonic agitation, which resulted in good dispersion of the nanofibers and nanotubes. The types of thermomechanical properties evaluated were glass transition temperature (Tg), coefficient of thermal expansion (CTE), and tensile creep behavior. The composite containing amine-functionalized nanotubes showed an increase of 10°C in Tg, and a 3/°C decrease in CTE. Use of functionalized nanotubes did not increase the creep resistance of epoxy as expected. It was found that, as nanofiber content increased from 0 to 10%, the Tg of the composites decreased by 12°C, the CTE remained roughly constant, and the creep compliance decreased by about 50%.

AB - The objective of this investigation is to characterize the thermomechanical behavior of nanoreinforced epoxy. The resin employed in this investigation is a bisphenol F epoxide with a diamine curing agent. The nanofillers are single walled carbon nanotubes and vapor grown carbon nanofibers. The objective of the tests carried out with nanotube reinforced epoxies is to assess the effects of chemical functionalization on the behavior, whereas the objective of the tests with nanofibers is to assess the effects of mass fraction of reinforcement on behavior. Some of the nanotubes were functionalized with amine groups to improve chemical bonding with epoxy. Nanofiber mass fractions varied from 0.5 to 10%. Processing methods employed an air-release agent, surfactant, and high frequency sonic agitation, which resulted in good dispersion of the nanofibers and nanotubes. The types of thermomechanical properties evaluated were glass transition temperature (Tg), coefficient of thermal expansion (CTE), and tensile creep behavior. The composite containing amine-functionalized nanotubes showed an increase of 10°C in Tg, and a 3/°C decrease in CTE. Use of functionalized nanotubes did not increase the creep resistance of epoxy as expected. It was found that, as nanofiber content increased from 0 to 10%, the Tg of the composites decreased by 12°C, the CTE remained roughly constant, and the creep compliance decreased by about 50%.

UR - http://www.scopus.com/inward/record.url?scp=84871016159&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84871016159&partnerID=8YFLogxK

M3 - Conference contribution

AN - SCOPUS:84871016159

SN - 9781622762828

T3 - 20th Technical Conference of the American Society for Composites 2005

SP - 790

EP - 803

BT - 20th Technical Conference of the American Society for Composites 2005

ER -

Sharma A, Schober JE, Bakis CE. Thermomechanical characterization of nanoreinforced composites. In 20th Technical Conference of the American Society for Composites 2005. 2005. p. 790-803. (20th Technical Conference of the American Society for Composites 2005).