Influence of critical carbon nanotube loading on mechanical and electrical properties of epoxidized natural rubber nanocomposites

Krainoi, Apinya; Kummerlöwe, Claudia; Nakaramontri, Yeampon; Vennemann, Norbert; Pichaiyut, Skulrat; Wisunthorn, Suwaluk; Nakason, Charoen

doi:10.1016/j.polymertesting.2018.01.003

Cited by 54 publications

(40 citation statements)

References 21 publications

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“…It was found that the thermal stability of ENR‐50/TiO 2 composites was improved, relative to that of the neat ENR‐50 vulcanizate . In addition, the dielectric constant and the electrical conductivity of ENR/CNT nanocomposites increased with the loading level of CNT . Also, increased dielectric constant was observed in the ENR/conductive CB (i.e., extra conductive furnace) composites .…”

Section: Introductionmentioning

confidence: 99%

“…That is, the polarity of ENR increases with the degree of epoxidation . Various types of fillers have been exploited to prepare composites with ENR, including titanium dioxide (TiO 2 ), carbon nanotubes (CNTs), carbon black (CB), silica, and rice husk ash (RHA) . It was found that the thermal stability of ENR‐50/TiO 2 composites was improved, relative to that of the neat ENR‐50 vulcanizate .…”

Section: Introductionmentioning

confidence: 99%

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Mechanical, thermal, morphological, and curing properties of geopolymer filled natural rubber composites

Yangthong

Pichaiyut

Jumrat

et al. 2018

J of Applied Polymer Sci

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The main objective of this work was to investigate influence of natural rubber (NR) types on mechanical, thermal, morphological, and curing properties together with relaxation behavior of geopolymer filled NR composites with and without bis(triethoxysilylpropyl) tetrasulfide (TESPT) silane coupling agent. Three alternative types of NR: unmodified NR, and epoxidized NR with 25 (ENR-25) or 50 mol % epoxide (ENR-50) were exploited. Rubber compounds filled with GP particles were prepared in an internal mixer at 60 C and 130-150 C for the ones with and without TESPT, respectively. It was found that incorporation of GP significantly affected cure characteristics and mechanical properties of the rubber composites. That is, decreasing cure time was observed from 11.6, 3.2, and 7.0 min in gum NR, ENR-25, and ENR-50 to 6.9, 2.1, and 5.0 min in NR/GP, ENR-25/GP, and ENR-50/GP compounds, respectively. Furthermore, the ENR-25/GP and ENR-50/GP composites showed finely dispersed GP particles which indicate high fillerrubber interactions. The in situ silanization with TESPT in rubber composites enhanced the mechanical properties of NR/GP and ENR-25/GP composites but no such enhancement was found in the ENR-50/GP composite. This matched the observations of Payne effect, maximum tan δ, and stress relaxation properties of the composites. We found that the ENR-25/GP composites exhibited the best overall properties.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanical, thermal, morphological, and curing properties of geopolymer filled natural rubber composites

Yangthong

Pichaiyut

Jumrat

et al. 2018

J of Applied Polymer Sci

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“…Typically, the addition of CNT could transform NR from electric insulator to conductive material with outstanding flexibility, elasticity and mechanical properties [1][2][3]. However, the optimum electrical conductivity and other related properties of NR/CNT composites are mainly controlled by localization and three dimensional networks of CNTs in the rubber matrix [4,5].…”

Section: Introductionmentioning

confidence: 99%

Influence of carbon nanotube and ionic liquid on properties of natural rubber nanocomposites

Krainoi¹,

Kummerloewe²,

Nakaramontri³

et al. 2019

Express Polym. Lett.

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Some properties of carbon nanotube (CNT) filled natural rubber (NR) composites were improved by adding an ionic liquid (IL), 1-butyl-3-methyl imidazolium bis (trifluoromethylsulphonyl)mide (BMI). In this work, the CNT and IL (CNT-IL) were mixed with NR by latex mixing method. Cure characteristics, thermo-mechanical properties, Payne effect, electrical conductivity and thermal stability were investigated. It was found that IL (BMI) accelerated vulcanization reactions and reduced scorch time. In addition, Fourier Transform Infrared (FTIR) results confirmed the role of IL in NR composites along with the reaction between CNT and NR molecules. The temperature scanning stress relaxation (TSSR) measurement was used to assess thermo-mechanical properties, and a relaxation peak of IL was found due to interactions of cations and anions in IL (BMI). Furthermore, the Payne effect was used to qualitatively analyze the roles of IL and CNT in three-dimensional CNT networks in the NR matrix. It was found that CNT dispersion was finer in the NR/CNT composites with IL. Furthermore, the NR/CNT-IL composite had higher electrical conductivity and lower percolation threshold concentration than the NR/CNT composite.

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“…MWCNTs have distinctive mechanical and electrical properties. They provide a unique potential to improve the mechanical [3][4][5] as well as electrical properties [6][7][8][9][10] of polymer-matrix composites. MWCNT-epoxy adhesives are used for applications such as electronic devices, smart adhesive joints in buildings and bus structures [11][12][13], and gas sensors [14].…”

Section: Introductionmentioning

confidence: 99%

MWCNT–Epoxy Nanocomposite Sensors for Structural Health Monitoring

et al. 2018

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Abstract:We address multi-walled carbon nanotubes (MWCNTs) for structural health monitoring in adhesive bonds, such as in building structures. MWCNT-loaded composites are employed to sense strain changes under tension load using an AC impedance measurement setup. Different weight percentages of 1, 1.5, 2 and 3 wt % MWCNTs are added to the base epoxy resin using different dispersion times, i.e., 5, 10, and 15 min. The equivalent parallel resistance of the specimens is first measured by applying an alternating voltage at different frequencies. To determine the mechanical as well as sensory properties, the specimens are then subjected to a tensile test with concurrent impedance measurement at a fixed pre-chosen frequency. Using alternating voltage, a higher sensitivity of the impedance reading can be achieved. Employing these sensors in buildings and combining the readings of a network of such devices can significantly improve the buildings' safety. Additionally, networks of such sensors can be used to identify necessary maintenance actions and locations.

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Influence of critical carbon nanotube loading on mechanical and electrical properties of epoxidized natural rubber nanocomposites

Cited by 54 publications

References 21 publications

Mechanical, thermal, morphological, and curing properties of geopolymer filled natural rubber composites

Mechanical, thermal, morphological, and curing properties of geopolymer filled natural rubber composites

Influence of carbon nanotube and ionic liquid on properties of natural rubber nanocomposites

MWCNT–Epoxy Nanocomposite Sensors for Structural Health Monitoring

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