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

Gofman, I. V.; Nikolaeva, Alexandra L.; Yakimansky, А. V.; Иванова, О. С.; Baranchikov, А. Е.; Иванов, В. К.

doi:10.1002/pat.4583

Cited by 13 publications

(17 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Development of such applications requires the use of a convenient matrix for efficient incorporation of the nanoparticles, to enhance the performance, avoid the cluster growth and aggregation and improve the handling and recovery of the nanoparticles. Up to now, CeO 2 particles were incorporated in various polymeric templates such as poly(meth)acrylates [ 6 , 7 , 8 ] polyurethanes [ 9 , 10 ], polyimides [ 11 ], polyamides [ 12 ] or polydimethylsiloxanes [ 13 ]. Among the plethora of polymers, one of the best candidates to immobilize CeO 2 nanoparticles (NPs), which fits both environmental and economic issues is represented by cellulose [ 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Cellulose Acetate Incorporating Organically Functionalized CeO2 NPs: Efficient Materials for UV Filtering Applications

et al. 2020

View full text Add to dashboard Cite

One of the major issues faced when constructing various materials incorporating inorganic nanoparticles (NPs) is aggregation leading to loss of their final activity. In our work, cellulose acetate (CA) has been used to serve as matrix for the synthesis of UV-shielding and transparent films containing various amounts (1–5 wt.%) of cerium oxide (CeO2) NPs. In order to attain an improved dispersion and a better connectivity between NPs and the cellulose matrix, the surface of CeO2 NPs have been previously functionalized by the reaction with 3-aminopropyl(diethoxy)methylsilane (APDMS). The uniform dispersion of the NPs in the homogeneous thin films has been evidenced by using Transmission Electron Microscopy (TEM) and Fourier Transformation Infrared Spectroscopy (FTIR) characterization. The investigation of the optical properties for the hybrid films through UV-Vis spectroscopy revealed that the presence of CeO2 NPs in the CA matrix determined the appearance of strong UV absorption bands in the region 312–317 nm, which supports their use as efficient UV absorbers. This study has shown that UV shielding ability of the nanocomposites can be easily tuned by adjusting the numberof inorganic NPs in the CA template.

show abstract

Section: Introductionmentioning

confidence: 99%

Cellulose Acetate Incorporating Organically Functionalized CeO2 NPs: Efficient Materials for UV Filtering Applications

et al. 2020

View full text Add to dashboard Cite

show abstract

“…In our previous work [ 19 , 20 ] we have investigated the impact of CeO 2 nanoparticles on the thermal properties of a number of polyimides. The thermal stability of a nanocomposite was found to be determined by the structure of a matrix PI, viz only the PIs with SO 2 -groups in the repeating subunits of macromolecules demonstrated a considerable enhancement in thermo-oxidative stability upon doping with ceria nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

et al. 2020

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…As it was repeatedly shown [1][2][3][4][5][6][7][8][9]12], the mechanical and thermal properties of the material are sensitive regarding to the introduction of active nanosized fillers into the polymer. Therefore, before studying the hydrolytic stability of PI-based composites, it was necessary to evaluate the degree of effectiveness of the fillers chosen as modifiers of the mechanical and thermal properties of the polymer.…”

Section: Resultsmentioning

confidence: 99%

“…Only for the composite films containing CeO 2 and MWCNT-COOH the pronounced depression of the thermal stability and some increase of the glass transition temperature were registered. The former effect is inherent to ceria-containing PMDA-ODA-based films [9].…”

Section: Resultsmentioning

confidence: 99%

“…It is known that, depending on the geometric characteristics of the nanofiller used and the nature of its interaction with the polymer matrix, both the "physical" modification mechanism due to the reinforcement of the polymer by rigid particles with a high aspect ratio and the "chemical" modification due to the formation of additional chemical interactions in the material can take place [3][4][5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of nanoparticles of various types as fillers on resistance to hydrolysis of films of heat-resistant polyimide

Bykova¹,

Gofman²,

Иванькова³

et al. 2019

Nanosystems: Phys. Chem. Math.

View full text Add to dashboard Cite

Impact of nanoparticles of various types as fillers on the stability of the poly(pyromellitimide)-based nanocomposite films' properties in alkaline hydrolysis was studied. It was shown that the introduction of nanoparticles into the polymer can lead to an increase in excess free volume. This fact is evidenced by scanning electron microscopy and densitometric studies. The increase of the excess free volume was shown to provoke a rise of the diffusion intensity of the hydrolyzing agent in the films volume during their exposure to an alkaline medium. This effect leads to film swelling and, thereby, to increases of the intensity of the destructive action of hydrolysis on the material. Chemical surface pretreatment of the nanofiller allows one to obtain a composite with an increased packing density compared to that for a composite with unmodified nanoparticles. However, the hydrolytic stability of such a film still remains somewhat inferior to that of the pristine polyimide.

show abstract

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

Cited by 13 publications

References 29 publications

Cellulose Acetate Incorporating Organically Functionalized CeO2 NPs: Efficient Materials for UV Filtering Applications

Cellulose Acetate Incorporating Organically Functionalized CeO2 NPs: Efficient Materials for UV Filtering Applications

Polyimide-Based Nanocomposites with Binary CeO2/Nanocarbon Fillers: Conjointly Enhanced Thermal and Mechanical Properties

Influence of nanoparticles of various types as fillers on resistance to hydrolysis of films of heat-resistant polyimide

Contact Info

Product

Resources

About