Aromatic Polyimide/MWCNT Hybrid Nanocomposites: Structure, Dynamics, and Properties

Zhang, Baode; Bershteĭn, V. A.; Sukhanova, T. E.; Zang, Wanchen; Chen, Chunhai; Egorova, L. M.; Gofman, I. V.; Gubanova, G. N.; Volkov, A. Ya.; Вылегжанина, М. Э.; Yakushev, P. N.; Li, Yao

doi:10.1080/00222348.2012.659640

Cited by 7 publications

(5 citation statements)

References 32 publications

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“…In turn, when the concentration of ceria reaches 10 wt%, the thermal stability of the nanocomposite falls drastically compared with that of the matrix polymer. Analyzing the obtained results, one should take into account the lack of homogeneity shown by the nanoparticles' distribution, leading to the formation of relatively large aggregates of nanoparticles, which has a negative effect on the functional properties of the polymer composites . An enhancement of thermal stability at medium CeO 2 contents presumably results from an increase in the number of specific links between ceria and sulfur atoms of sulfonic groups, whereas deterioration of this property at higher concentrations may be explained by an overall growth of oxidizing catalytic activity of the nanosized dopant.…”

Section: Resultsmentioning

confidence: 99%

Unexpected selective enhancement of the thermal stability of aromatic polyimide materials by cerium dioxide nanoparticles

Gofman

Nikolaeva

Yakimansky

et al. 2019

Polymers for Advanced Techs

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The unusual effect of selective enhancement of the thermal stability of aromatic polyimide materials was established through the introduction of cerium dioxide nanoparticles into these polymers as nanofiller. Depending on the chemical structure of the polymers, a marked increase or a substantial decrease in the thermal stability of the nanocomposite material was registered by thermal analysis, as compared with that of unfilled polymer material. The positive effect was registered only for the composite materials based on the matrix polyimides containing the sulfur atoms located in the sulfonic groups arranged in the elementary units. The results of the thermogravimetric examination are compared with the data obtained during the mechanical tests of the same samples. The possible reasons for the alteration of the thermal stability of polymers by ceria nanoparticles are discussed. The effect above can be of substantial practical interest providing new options for the design of polyimide nanocomposite materials with enhanced thermal stability.

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Section: Resultsmentioning

confidence: 99%

Unexpected selective enhancement of the thermal stability of aromatic polyimide materials by cerium dioxide nanoparticles

Gofman

Nikolaeva

Yakimansky

et al. 2019

Polymers for Advanced Techs

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“…However, aggregation of the carbon nanotube in the polymer matrix leads to deterioration of properties. Methods such as functionalization and sonication have been devised to achieve good dispersion …”

Section: Introductionmentioning

confidence: 99%

“…Methods such as functionalization and sonication have been devised to achieve good dispersion. [8][9][10][11][12][13][14] Carbon nanotubes have attracted much attention worldwide, because they have superior physical and chemical properties that are suitable for applications in hydrogen storage, chemical sensor, actuators, conductive tapes, tissue engineering, biomedical devices, and as nano-reinforcement for composites. 15-18 Carbon nanotubesreinforced polymer nanocomposites are emerging as a new chemical technology in the processing of materials.…”

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confidence: 99%

Microwave‐assisted synthesis of nanocomposites from polyimides chemically cross‐linked with functionalized carbon nanotubes for aerospace applications

Govindaraj

Sarojadevi

2018

Polymers for Advanced Techs

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Polymer‐carbon nanotube nanocomposites are extensively investigated for microelectronics and aerospace applications. In this study, novel polyimide/f‐MWCNT nanocomposites made from 2,4‐bis(4‐aminophenylamido)‐6‐chloroquinazoline, pyromellitic dianhydride and functionalized‐Multi Walled Carbon Nanotubes (f‐MWCNT) by an efficient microwave assisted method were investigated. The structure of the prepared diamine monomer was confirmed by FT‐IR, 1H‐NMR, and 13C‐NMR spectral techniques. The prepared nanocomposites (Tg values from 338°C to 375°C) show improved thermal property as indicated by differential scanning calorimetry and thermogravimetric analysis. Polyimide/f‐MWCNT nanocomposites were found to have higher dielectric constant, and the limiting oxygen index values of prepared nanocomposites are in the range of 29.5 to 35.5, indicating a high flame retardancy. Additionally, the morphological studies were conducted by X‐ray diffraction and scanning electron microscopy. Overall, it is observed that chemically connected polyimide‐functionalized carbon nanotube nanocomposites could be used for aerospace and microelectronics applications that require high Tg, dielectric constant and high flame retardancy.

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“…Li Xiaodong and coworkers developed polyimide/MWCNT hybrid film with improved corona resistance from poly(amic acid) precursor and MWCNT through ultrasonic blending and in situ polymerization . Li and coworkers synthesized two series of polyimide/MWCNT nanocomposites from aromatic diamine monomer containing benzoxazole moiety, unmodified MWCNT, functionalized MWCNT and reported that the prepared nanocomposites have improved mechanical, thermal, and electrical properties .…”

Section: Introductionmentioning

confidence: 99%

Microwave-assisted synthesis and characterization of polyimide/functionalized MWCNT nanocomposites containing quinolyl moiety

Govindaraj

Sarojadevi

2015

Polym. Compos.

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Polyimide-MWCNT nanocomposites were prepared by the reaction of a heterocyclic diamine monomer of bis(4amino-3,5-dimethylphenyl)-2-chloro-3-quinolylmethane (BACQM), pyromellitic dianhydride (PMDA) with unmodified MWCNT (MWCNT), acid-functionalized MWCNT (acid-MWCNT) or amine-functionalized MWCNT (amine-MWCNT) using microwave irradiation as well as by the conventional method. The structure of the monomer was confirmed by FTIR, 1 H-NMR, and 13 C-NMR spectral techniques. The glass transition temperature (T g ) of the MWCNTs/polyimide nanocomposite was found to be higher than that of the unfilled polyimide system. The T g 's of both systems were higher when prepared with the microwave method than the conventional synthesis. The T g 's of the nanocomposites using acid and amine functionalized MWCNTs are greater than 300 C, in both methods. This is attributed to the presence of hydrogen bond and strong covalent bond in both the acid-MWCNT/polyimide and amine-MWCNT/polyimide systems. The morphological studies of the nanocomposites synthesized using microwave irradiation show that a distinct MWCNT nanofibrillar network is formed in the matrix when MWCNT or acid-MWCNT is used. A homogeneous morphology, without distinct nanotube domains is seen when the amine-MWCNT is covalently linked to the polymer. POLYM. COMPOS., 37:2417-2424, 2016

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Aromatic Polyimide/MWCNT Hybrid Nanocomposites: Structure, Dynamics, and Properties

Cited by 7 publications

References 32 publications

Unexpected selective enhancement of the thermal stability of aromatic polyimide materials by cerium dioxide nanoparticles

Unexpected selective enhancement of the thermal stability of aromatic polyimide materials by cerium dioxide nanoparticles

Microwave‐assisted synthesis of nanocomposites from polyimides chemically cross‐linked with functionalized carbon nanotubes for aerospace applications

Microwave-assisted synthesis and characterization of polyimide/functionalized MWCNT nanocomposites containing quinolyl moiety

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