Acid surface modified carbon nanotube-filled fluoroelastomers aging test in oil-based drilling fluids

Heidarian, Javad

doi:10.1177/0095244317695362

Cited by 9 publications

(3 citation statements)

References 39 publications

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“…[ 21 ] (ii) The interaction between MWCNT and rubber increases physical and chemical cross‐linking points, hinders the entry of oxygen from the outside and prevents the degradation of polymer chains. [ 22 ] (iii) MWCNT has the high electron affinity (2.65 eV), which can capture free radicals generated by the rubber molecular chains under the dual action of heat and oxygen. [ 23 ] (iv) The compatibilization effect of MWCNT improves the interfacial interaction between NBR and EPDM, so that the aging resistance of the EPDM part in the composites can be reflected.…”

Section: Resultsmentioning

confidence: 99%

The effect of tannic acid functional multi‐walled carbon nanotubes on the properties of nitrile rubber/ethylene propylene diene monomer composites

Song

Wang

2022

Polymer Composites

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Multi‐walled carbon nanotubes (MWCNT) were first non‐covalently functioned by tannic acid (TA), then blended with nitrile rubber (NBR) and ethylene propylene diene monomer (EPDM) with NBR:EPDM:TA‐MWCNT = 70:30:5. TA‐MWCNT and the composites had been characterized by various techniques, including Fourier transform infrared spectroscopy (FT‐IR), Raman analysis, transmission electron microscopy (TEM), mechanical properties testing, thermal‐oxidative aging testing, differential scanning calorimetry (DSC), dynamic mechanical analysis (DMA), and scanning electron microscopy (SEM). Results indicated that TA molecules were successfully absorbed to the surface of MWCNT. And compared with NBR/EPDM/MWCNT composites, the compatibility between NBR and EPDM had been significantly improved. The NBR/EPDM/TA‐MWCNT exhibited excellent mechanical properties and thermal‐oxidative aging properties due to the phenolic hydroxyl groups on the surface of TA‐MWCNT, which had high chemical reactivity and physical adhesion. These phenolic hydroxyl groups gave TA‐MWCNT better dispersion in the rubber matrixes and can participate in the vulcanization process, creating the firm interface between the rubber matrixes and the surface of MWCNT.

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Section: Resultsmentioning

confidence: 99%

The effect of tannic acid functional multi‐walled carbon nanotubes on the properties of nitrile rubber/ethylene propylene diene monomer composites

Song

Wang

2022

Polymer Composites

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“…In our previous research work, 39 acid surface-modified carbon nanotube (ACNT)-filled FE (ACNT/FE), CNT/FE and FE were prepared. The oil-based drilling (OBD) mud aging resistances of these elastomers were assessed by tests of weight gain, swelling, atomic force microscopy (AFM), and optical microscopy.…”

Section: Resultsmentioning

confidence: 99%

Characterization and comparison of fluoroelastomer unfilled, filled with carbon nanotube (unmodified, acid or base surface modified) and carbon black using TGA-GCMS

Heidarian

Hassan

2021

Journal of Elastomers & Plastics

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Carbon nanotube (CNT)-, surface-modified CNT: acid (–COOH) modified (MCNT) or base (–OH) modified (OHCNT), carbon black (CB)-filled fluoroelastomer (FE) and unfilled FE were prepared (CNT/FE, MCNT/FE, OHCNT/FE, CB/FE and FE). The thermal properties of the composites were assessed by TGA-GCMS and TGA and compared for all samples. TGA-GCMS results show that degradation products that obtained due to breakage of the CF2-CH2 bond (group A) and CF2-CF2 bond (group B) in base FE, obtained in lower temperatures and higher temperatures of TGA scan respectively, therefore CF2-CF2 bond is more thermally stable than CF2-CH2. For degradation products of group A and group B, the relative abundance decreased in the following orders respectively for all samples: CB/FE, CNT/FE, OHCNT/FE, FE, MCNT/FE; and MCNT/FE, OHCNT/FE, FE, CNT/FE, CB/FE. Therefore nanofillers and particularly surface-modified nanofillers produce less amount of group A degradation products and more amount of group B degradation products and therefore increase the thermal stability of the base FE. For all samples, the volatile degradation products that have the highest intensity are: (C6F7H2)•+, C4H6F+ and C6F11 + and the volatile degradation products are similar except for OHCNT/FE and MCNT/FE. TGA results also show that thermal stability reduced in the following orders in the lower temperature range and higher temperature range respectively: OHCNT/FE, FE, CB/FE, CNT/FE, MCNT/FE; and CB/FE, MCNT/FE, CNT/FE, FE, OHCNT/FE. Totally the results show that OHCNT/FE, MCNT/FE and CNT/FE can be used at high temperatures for making O-rings for very deep oil and gas drilling.

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“…The incorporation of carbon nanotubes as filler is widely used and usually improves electrical, thermal, and mechanical properties, mainly when well dispersed. Carbon nanotubes have higher mechanical and electrical properties in comparison to carbon nanofibers (CNFs).…”

Section: Introductionmentioning

confidence: 99%

Fluoroelastomers reinforced with carbon nanofibers: A survey on rheological, swelling, mechanical, morphological, and prediction of the thermal degradation kinetic behavior

Ornaghi

Bianchi

Ornaghi

et al. 2019

Polymer Engineering & Sci

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Fluoroelastomer (FE) reinforced with carbon nanofiber (CNF) (1 and 2 phr) was prepared using an instrumented batch mixer. A property–structure relationship was compared with the compounds containing carbon black (30 phr), neat FE, and hybrid sample (nanofiber + carbon black, 2 phr + 30 phr, respectively). Nanofiber did not improve the mechanical behavior while swelling characteristic was improved as well the initial weight loss by thermogravimetry. The compounds achieve conductive characteristic using only 1 phr. The thermal decomposition of the compounds was carried out using different kinetic approaches in order to establish consistent parameters. It has been shown that the approaches using consistent kinetic parameters can be combined in such a way as to enhance the reliability and quality of each other and consequently the overall kinetic analysis. The limited dispersion with agglomerations seems to be the crucial factor for all analyses evaluated. Finally, the synergism between nanofiber and carbon black for hybrid compound make CNFs very attractive to be used as an additive in the elastomeric composition. POLYM. ENG. SCI., 59:1223–1232 2019. © 2019 Society of Plastics Engineers

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Acid surface modified carbon nanotube-filled fluoroelastomers aging test in oil-based drilling fluids

Cited by 9 publications

References 39 publications

The effect of tannic acid functional multi‐walled carbon nanotubes on the properties of nitrile rubber/ethylene propylene diene monomer composites

The effect of tannic acid functional multi‐walled carbon nanotubes on the properties of nitrile rubber/ethylene propylene diene monomer composites

Characterization and comparison of fluoroelastomer unfilled, filled with carbon nanotube (unmodified, acid or base surface modified) and carbon black using TGA-GCMS

Fluoroelastomers reinforced with carbon nanofibers: A survey on rheological, swelling, mechanical, morphological, and prediction of the thermal degradation kinetic behavior

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