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Construction and Mechanism Analysis of a Self-Assembled Conductive Network in DGEBA/PEI/HRGO Nanocomposites by Controlling Filler Selective Localization

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Abstract
Herein, a feasible and effective approach is developed to build an electrically conductive
and double percolation network-like structure via the incorporation of highly reduced graphene ox?ide (HRGO) into a polymer blend of diglycidyl ether of bisphenol A/polyetherimide (DGEBA/PEI).
With the assistance of the curing reaction-induced phase separation (CRIPS) technique, an intercon?nected network of HRGO is formed in the phase-separated structure of the DGEBA/PEI polymer
blend due to selective localization behavior. In this study, HRGO was prepared from a unique
chemical reduction technique. The DGEBA/PEI/HRGO nanocomposite was analyzed in terms
of phase structure by content of PEI and low weight fractions of HRGO (0.5 wt.%). The HRGO
delivered a high electrical conductivity in DGEBA/PEI polyblends, wherein the value increased
from 5.03 × 10?16 S/m to 5.88 S/m at a low content of HRGO (0.5 wt.%). Furthermore, the HRGO
accelerated the curing reaction process of CRIPS due to its amino group. Finally, dynamic mechanical
analyses (DMA) were performed to understand the CRIPS phenomenon and selective localization of
HRGO reinforcement. The storage modulus increased monotonically from 1536 MPa to 1660 MPa for
the 25 phr (parts per hundred in the DGEBA) PEI polyblend and reached 1915 MPa with 0.5 wt.%
HRGO reinforcement. These simultaneous improvements in electrical conductivity and dynamic
mechanical properties clearly demonstrate the potential of this conductive polyblend for various
engineering applications.
Author(s)
맹일명Sushant SharmaWenjun Gan허승현최원묵정진석
Issued Date
2021
Type
Article
Keyword
polyblendnanocompositesreduced graphene oxidecuring reaction-induced phase separation (CRIPS)selective localizationmicrostructural analysis
DOI
10.3390/nano11010228
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9224
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_doaj_primary_oai_doaj_org_article_61fcc72dafe64ac9969aa4a9fd1c2447&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Construction%20and%20Mechanism%20Analysis%20of%20a%20Self-Assembled%20Conductive%20Network%20in%20DGEBA%2FPEI%2FHRGO%20Nanocomposites%20by%20Controlling%20Filler%20Selective%20Localization&offset=0&pcAvailability=true
Publisher
NANOMATERIALS
Location
스위스
Language
영어
ISSN
2079-4991
Citation Volume
11
Citation Number
1
Citation Start Page
228
Citation End Page
228
Appears in Collections:
Engineering > Chemical Engineering
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