TY - JOUR

T1 - Polyimide-based nanocomposites with binary CeO2/nanocarbon fillers

T2 - Conjointly enhanced thermal and mechanical properties

AU - Nikolaeva, Alexandra L.

AU - Gofman, Iosif V.

AU - Yakimansky, Alexander V.

AU - Ivan’kova, Elena M.

AU - Abalov, Ivan V.

AU - Baranchikov, Alexander E.

AU - Ivanov, Vladimir K.

N1 - Funding Information: Funding: The work was supported by the Russian Science Foundation (project No. 18-13-00305). Publisher Copyright: © 2020 by the authors. Licensee MDPI, Basel, Switzerland. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.

PY - 2020/9

Y1 - 2020/9

N2 - To design novel polymer materials with optimal properties relevant to industrial usage, it would seem logical to modify polymers with reportedly good functionality, such as polyimides (PIs). We have created a set of PI-based nanocomposites containing binary blends of CeO2 with carbon nanoparticles (nanocones/discs or nanofibres), to improve a number of functional characteristics of the PIs. The prime novelty of this study is in a search for a synergistic effect amidst the nanofiller moieties regarding the thermal and the mechanical properties of PIs. In this paper, we report on the structure, thermal, and mechanical characteristics of the PI-based nanocomposites with binary fillers. We have found that, with a certain composition, the functional performance of a material can be substantially improved. For example, a PI containing SO2-groups in its macrochains not only had its thermal stability enhanced (by ~20◦C, 10% weight loss up to 533◦C) but also had its stiffness increased by more than 10% (Young’s modulus as high as 2.9–3.0 GPa) in comparison with the matrix PI. In the case of a PI with no sulfonic groups, binary fillers increased stiffness of the polymer above its glass transition temperature, thereby widening its working temperature range. The mechanisms of these phenomena are discussed. Thus, this study could contribute to the design of new composite materials with controllable and improved functionality.

AB - To design novel polymer materials with optimal properties relevant to industrial usage, it would seem logical to modify polymers with reportedly good functionality, such as polyimides (PIs). We have created a set of PI-based nanocomposites containing binary blends of CeO2 with carbon nanoparticles (nanocones/discs or nanofibres), to improve a number of functional characteristics of the PIs. The prime novelty of this study is in a search for a synergistic effect amidst the nanofiller moieties regarding the thermal and the mechanical properties of PIs. In this paper, we report on the structure, thermal, and mechanical characteristics of the PI-based nanocomposites with binary fillers. We have found that, with a certain composition, the functional performance of a material can be substantially improved. For example, a PI containing SO2-groups in its macrochains not only had its thermal stability enhanced (by ~20◦C, 10% weight loss up to 533◦C) but also had its stiffness increased by more than 10% (Young’s modulus as high as 2.9–3.0 GPa) in comparison with the matrix PI. In the case of a PI with no sulfonic groups, binary fillers increased stiffness of the polymer above its glass transition temperature, thereby widening its working temperature range. The mechanisms of these phenomena are discussed. Thus, this study could contribute to the design of new composite materials with controllable and improved functionality.

KW - Binary nanofillers

KW - Carbon nanocones/discs

KW - Carbon nanofibres

KW - Nanoceria

KW - Nanocomposites

KW - Polyimides

KW - GRAPHENE OXIDE

KW - carbon nanocones

KW - polyimides

KW - nanoceria

KW - carbon nanofibres

KW - discs

KW - nanocomposites

KW - CARBON NANOTUBES

KW - FILMS

KW - CERIUM OXIDE NANOPARTICLES

KW - binary nanofillers

UR - http://www.scopus.com/inward/record.url?scp=85093969693&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/1ee48f9b-30c8-3555-9053-47a1bc9149c5/

U2 - 10.3390/polym12091952

DO - 10.3390/polym12091952

M3 - Article

AN - SCOPUS:85093969693

VL - 12

SP - 1

EP - 17

JO - Polymers

JF - Polymers

SN - 2073-4360

IS - 9

M1 - 1952

ER -