Construction and Mechanism Analysis of a Self-Assembled Conductive Network in DGEBA/PEI/HRGO Nanocomposites by Controlling Filler Selective Localization
| Autor: | Won Mook Choi, Sushant Sharma, Seung Hyun Hur, Wenjun Gan, Yiming Meng, Jin Suk Chung |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite Diglycidyl ether Graphene General Chemical Engineering polyblend Dynamic mechanical analysis Polyetherimide reduced graphene oxide Article law.invention lcsh:Chemistry chemistry.chemical_compound Chemical engineering chemistry lcsh:QD1-999 selective localization law Phase (matter) nanocomposites microstructural analysis General Materials Science Polymer blend curing reaction-induced phase separation (CRIPS) Curing (chemistry) |
| Zdroj: | Nanomaterials Volume 11 Issue 1 Nanomaterials, Vol 11, Iss 228, p 228 (2021) |
| ISSN: | 2079-4991 |
| Popis: | 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 oxide (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 interconnected 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&minus 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. |
| Databáze: | OpenAIRE |
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