The effect of CNT-reinforced polyurethane foam cores to flexural properties of sandwich composites

Cigdem Caglayan; Idris Gurkan; Sila Gungor; Hulya Cebeci

doi:10.1016/j.compositesa.2018.09.019

The effect of CNT-reinforced polyurethane foam cores to flexural properties of sandwich composites

Cigdem Caglayan
, Idris Gurkan
, Sila Gungor
, Hulya Cebeci^*

^*Bu çalışma için yazışmadan sorumlu yazar

Uçak Mühendisliği Bölümü

Istanbul Technical University
Turkish Armed Forces Foundation

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

68 Atıf (Scopus)

Özet

In foam cored sandwich composites, it is crucial to understand micromechanical characteristics of foam in relation with its properties to understand synergetic effects of adding nanomaterials such as CNTs. In this study, effects of CNT dispersion and distribution on cell morphology and foamability of rigid polyurethane (PU), which is directly related to microstructure and mechanical performance of overall structures were investigated. Raw and functional CNTs were added to rigid polyurethane foams up to 0.2 wt.% and their compressive strength is evaluated. The results showed that dispersion media such as PMDI with low viscosity revealed a better CNT dispersion and resulted with an enhancement of 13% in compressive strength compared to neat PU foams. This enhancement in foam core properties reflected in sandwich composites with an enhancement approximately 30% in both core shear and face ultimate strength. Hence, core shear found to be the common failure mechanism for all sandwich composites.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	187-195
Sayfa sayısı	9
Dergi	Composites Part A: Applied Science and Manufacturing
Hacim	115
DOI'lar	https://doi.org/10.1016/j.compositesa.2018.09.019
Yayın durumu	Yayınlandı - Ara 2018

Bibliyografik not

Publisher Copyright:
© 2018 Elsevier Ltd

Finansman

The authors thank to Roketsan Missiles Inc. and ITU BAP (Project No: MYL-2017-40704) for supporting this work financially. The authors also would like to thank to M.Sc. student Beyza Bozali for performing the mechanical tests and Hasan Kaşıkçı for the support received from Likrom Inc. during the rheological tests. Also special thanks to Didem Ovalı and Deniz Köken for TGA analyses.

Finansörler	Finansör numarası
Likrom Inc.
Missiles Inc. and ITU BAP	MYL-2017-40704
Roketsan Missiles Inc.

Belgeye Erişim

10.1016/j.compositesa.2018.09.019

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "The effect of CNT-reinforced polyurethane foam cores to flexural properties of sandwich composites",

abstract = "In foam cored sandwich composites, it is crucial to understand micromechanical characteristics of foam in relation with its properties to understand synergetic effects of adding nanomaterials such as CNTs. In this study, effects of CNT dispersion and distribution on cell morphology and foamability of rigid polyurethane (PU), which is directly related to microstructure and mechanical performance of overall structures were investigated. Raw and functional CNTs were added to rigid polyurethane foams up to 0.2 wt.\% and their compressive strength is evaluated. The results showed that dispersion media such as PMDI with low viscosity revealed a better CNT dispersion and resulted with an enhancement of 13\% in compressive strength compared to neat PU foams. This enhancement in foam core properties reflected in sandwich composites with an enhancement approximately 30\% in both core shear and face ultimate strength. Hence, core shear found to be the common failure mechanism for all sandwich composites.",

keywords = "Carbon nanotubes, Failure modes, Heterogeneous nucleation, Polyurethane, Rheology, Sandwich composites, Three-point bending",

author = "Cigdem Caglayan and Idris Gurkan and Sila Gungor and Hulya Cebeci",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = dec,

doi = "10.1016/j.compositesa.2018.09.019",

language = "English",

volume = "115",

pages = "187--195",

journal = "Composites Part A: Applied Science and Manufacturing",

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TY - JOUR

T1 - The effect of CNT-reinforced polyurethane foam cores to flexural properties of sandwich composites

AU - Caglayan, Cigdem

AU - Gurkan, Idris

AU - Gungor, Sila

AU - Cebeci, Hulya

PY - 2018/12

Y1 - 2018/12

N2 - In foam cored sandwich composites, it is crucial to understand micromechanical characteristics of foam in relation with its properties to understand synergetic effects of adding nanomaterials such as CNTs. In this study, effects of CNT dispersion and distribution on cell morphology and foamability of rigid polyurethane (PU), which is directly related to microstructure and mechanical performance of overall structures were investigated. Raw and functional CNTs were added to rigid polyurethane foams up to 0.2 wt.% and their compressive strength is evaluated. The results showed that dispersion media such as PMDI with low viscosity revealed a better CNT dispersion and resulted with an enhancement of 13% in compressive strength compared to neat PU foams. This enhancement in foam core properties reflected in sandwich composites with an enhancement approximately 30% in both core shear and face ultimate strength. Hence, core shear found to be the common failure mechanism for all sandwich composites.

AB - In foam cored sandwich composites, it is crucial to understand micromechanical characteristics of foam in relation with its properties to understand synergetic effects of adding nanomaterials such as CNTs. In this study, effects of CNT dispersion and distribution on cell morphology and foamability of rigid polyurethane (PU), which is directly related to microstructure and mechanical performance of overall structures were investigated. Raw and functional CNTs were added to rigid polyurethane foams up to 0.2 wt.% and their compressive strength is evaluated. The results showed that dispersion media such as PMDI with low viscosity revealed a better CNT dispersion and resulted with an enhancement of 13% in compressive strength compared to neat PU foams. This enhancement in foam core properties reflected in sandwich composites with an enhancement approximately 30% in both core shear and face ultimate strength. Hence, core shear found to be the common failure mechanism for all sandwich composites.

KW - Carbon nanotubes

KW - Failure modes

KW - Heterogeneous nucleation

KW - Polyurethane

KW - Rheology

KW - Sandwich composites

KW - Three-point bending

UR - https://www.scopus.com/pages/publications/85054197607

U2 - 10.1016/j.compositesa.2018.09.019

DO - 10.1016/j.compositesa.2018.09.019

M3 - Article

AN - SCOPUS:85054197607

SN - 1359-835X

VL - 115

SP - 187

EP - 195

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

ER -

The effect of CNT-reinforced polyurethane foam cores to flexural properties of sandwich composites

Özet

Bibliyografik not

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

Alıntı Yap