Study on the ozonation-modified multi-walled carbon nanotubes in polymer composites

Hao, Yingjie; Qu, Shengqi; Xiao, Yao; Sui, Zhihua; Han, Shuang; Zhu, Donglin; Wang, Chuansheng; Bian, Huiguang

doi:10.1007/s00289-022-04367-z

Cited by 4 publications

(3 citation statements)

References 21 publications

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“…Dissolution of the cross‐linked network structure of vulcanizate in organic liquids involves the diffusion of small organic liquid molecules into the rubber crosslinked network, leading to “swelling.” Conversely, the contraction of the rubber crosslinked network will “expel” small organic liquid molecules. Once an equilibrium is reached between “swelling” and “expel,” the degree of rubber swelling serves as an indicator of the crosslink density 28 …”

Section: Resultsmentioning

confidence: 99%

“…Once an equilibrium is reached between "swelling" and "expel," the degree of rubber swelling serves as an indicator of the crosslink density. 28 The data related to the measured crosslink density of the three sets of composites are shown in Table 3. Table 3 shows that the crosslink density of the composites C2 and C3, after K 2 FeO 4 modification, is higher than that of the untreated MWNTs composite C1, with the value increasing with the degree of oxidation.…”

Section: Vulcanization Characteristics and Crosslink Densitymentioning

confidence: 99%

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Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Xue,

Hao,

et al. 2024

Polymer Composites

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This study employs potassium ferrate (K2FeO4) for the oxidation treatment of multi‐walled carbon nanotubes (MWNTs) under neutral and acidic conditions. A wet flash evaporation process is utilized to prepare natural rubber/MWNTs/carbon black composites, enhancing the performance of rubber composites. The increased oxidation level of MWNTs enhances their hydrophilicity, increases the quantity of oxygen‐containing hydroxyl groups on the surface, promotes dispersion within the natural rubber matrix, and ultimately improves the performance of the rubber products. The effective dispersion of MWNTs reduces electron transport resistance, forming a favorable electron transport channel in natural rubber. Experimental results indicate that K2FeO4 achieves the highest oxidation degree and optimal performance in an acidic environment. Compared to untreated MWNTs rubber composites, the oxidized MWNTs rubber composites exhibit a 34.9% reduction in the Payne effect, a 15.7% decrease in wear, a 12.7% reduction in rolling resistance, and a two‐order‐of‐magnitude increase in conductivity. This study provides a novel approach for preparing water‐dispersible MWNTs and high‐performance rubber composites, holding potential applications in premium rubber products and conductive rubber fields.Highlights The wet flash refining process improved the dispersion of MWNTs. K2FeO4 oxidation of MWNTs was enhanced under acidic conditions. Oxidized MWNTs combined with CB to form a CB‐MWNTs‐CB filler network. Oxidized MWNTs and CB increased the “ball‐chain” arrangement in NR.

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Section: Resultsmentioning

confidence: 99%

Section: Vulcanization Characteristics and Crosslink Densitymentioning

confidence: 99%

Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Xue,

Hao,

et al. 2024

Polymer Composites

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“…It has been observed that the sensing properties of carbon nanotube depend upon the charge or electron transport features [37][38][39]. Selectivity, sensitivity, and response times of carbon nanotube derived nanomaterials have studied for the carbon nanotube based sensors [40]. For sensors based on carbon nanotube nanocomposites, uniform dispersion of nanotube inn matrices, interface formation and choice of facile processing technique have been found indispensable.…”

Section: Gas Sensing Potential Of Carbon Nanotube Nanocompositesmentioning

confidence: 99%

Carbon and graphene based nanocomposites for gas sensors—Current state and advances

Kausar,

Ahmad

2024

Charact. Appl. Nanomater.

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After the discovery of carbon nanoforms, carbon nanotube (one dimensional) and tube like nanostructure and graphene (two dimensional) nanosheets have gained immense research curiosity. Further nanotechnological developments have moved towards the formation of carbon nanotube nanocomposites and graphene nanocomposites. For the purpose, various matrices including thermoplastic polymers and conjugated polymers have been used. Methodology is the systematic gathering of the literature and development of a novel review outline, theme, and discussions regarding the discussed topics. Hence, varying conjugated polymers such as polyaniline, polythiophene, poly(3,4-ethylenedioxythiophene), and nonconjugated nylon, poly(ethylene glycol), etc. have been processed using techniques like in situ, solution, electropolymerization, spin coating, etc. In sensors, the nanocomposites need to develop fine nanoparticle dispersion, network formation, and interfacial interactions ultimately supporting the electron or charge transfer in these nanomaterials desirable for the recognition of the gaseous species. Moreover, interactions of the nanocomposite with the analyte molecules define the sensing capabilities of the nanomaterials. Consequently, nanocarbon nanocomposite based gas sensors have been analyzed for conductivity, change in resistance, sensitivity, selectivity, response time, detection limit, and other desirable properties. For future designs, it is recommended to develop high-tech combinations of conjugated polymers like polythiophene derivatives using functional forms of graphene and carbon nanotube. In addition, use of advanced manufacturing techniques like 3D/4D printing and spin coating must be applied to form efficient sensors. In conclusions, this manuscript presents not only comprehensive but also comparative analysis on different gas analysis parameters such as detection limit, concentration, response time, etc. for various nanocomposite sensors. Lastly, the encounters in preparing and applying graphene/carbon nanotube sensors, associated utilizations, and possible future prospects have been discussed.

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Preparation of low‐rolling resistance natural rubber composites from pyrolysis carbon black by plasma treatment

Gong,

Xiao,

et al. 2024

Polymer Engineering & Sci

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In this study, the surface of pyrolysis carbon black (CBp) is modified by integrating the ball milling process with plasma treatment. High‐energy mechanical ball milling enabled more uniform contact and sufficient reaction temperature for the silane coupling agent and CBp. In addition, the impact of plasma activated the ash and surface deposits of CBp, reducing its inertness. Herein, the filler dispersion grade, Payne effect, vulcanization characteristics, and mechanical and dynamic mechanical properties are investigated by considering modified CBp/natural rubber (NR) composites. The ball milling plasma process can reduce the polarity of CBp. Compared with untreated CBp/NR composites, the plasma‐treated SCA‐CBp/NR composites exhibited increased CBp dispersion grades, higher processing safety, better processing fluidity, and improved mechanical properties. The reduced Payne effect ensured more filler‐rubber network structure, resulting in a reduction in rolling resistance.HighlightsThe coupling agent and CBp are treated by low‐temperature plasma and ball milling.The process promotes the formation of the filler‐rubber network.The dispersion grade of composites increased by 26.29%.The tensile strength increased by 5.57%, and the rolling resistance decreased by 19.44%.

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Study on the ozonation-modified multi-walled carbon nanotubes in polymer composites

Cited by 4 publications

References 21 publications

Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Carbon and graphene based nanocomposites for gas sensors—Current state and advances

Preparation of low‐rolling resistance natural rubber composites from pyrolysis carbon black by plasma treatment

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Study on the ozonation-modified multi-walled carbon nanotubes in polymer composites

Cited by 4 publications

References 21 publications

Exploring the reinforcement and conductivity mechanism of K2FeO4‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Exploring the reinforcement and conductivity mechanism of K2FeO4‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Carbon and graphene based nanocomposites for gas sensors—Current state and advances

Preparation of low‐rolling resistance natural rubber composites from pyrolysis carbon black by plasma treatment

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Product

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Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites

Exploring the reinforcement and conductivity mechanism of K₂FeO₄‐modified multiwalled carbon nanotubes in carbon black/natural rubber composites