Oriented molybdenum disulfide-silica/hydrogenated nitrile butadiene rubber composites: Effects of nanosheets on mechanical and dielectric properties

Wang, Yanan; Suo, Junying; Wang, Dongye; Li, Wei; Hou, Pingan; Pan, Jianfeng; Zhu, Hong

doi:10.1016/j.cja.2022.06.007

Cited by 5 publications

(4 citation statements)

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“…The strain S in thickness direction is defined by the following equation introduced by Pelrin et al, where E is the electric field strength, Y the elastic modulus, ε the dielectric constant of the dielectric film, and ε 0 the dielectric constant of vacuum ,, S = ε ε 0 E 2 Y . The expansion–contraction characteristics of DEs are unique, which have been exploited in various studies in an attempt to develop soft actuators and robotic assemblies. Mostly, DEs such as silicone, acrylic, nitrile-butadiene rubber (NBR), , hydrogenated nitrile-butadiene rubber (HNBR), , carboxylated nitrile-butadiene rubber (XNBR), , polyurethane, silicone rubber, , etc., have been reported for potential applications as soft actuators. ,− Among various dielectric elastomers, liquid rubbers offer benefits of fabrication ease, design flexibility, and compositional uniformity. , Such characteristics also made liquid rubbers as attractive materials for emerging fabrication technologies such as the 3D printing process for fabricating DEAs in various geometric possibilities. − The use of liquid rubbers is also advantageous for producing intricate structures such as adaptive fiber–elastomer composites with integrated actuators. Here, liquid rubbers can easily infiltrate into a woven textile structure without destroying the preferential orientations of fibers usually desirable to achieve anisotropy in the composite physical properties. − …”

Section: Introductionmentioning

confidence: 99%

Network Formation, Properties, and Actuation Performance of Functionalized Liquid Isoprene Rubber

Nirmala Suresh,

Liebscher,

Komber

et al. 2024

ACS Omega

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Due to some useful mechanical, dynamic, and dielectric properties along with the ease of processing and forming, liquid rubbers are ideal materials for fabricating dielectric elastomer actuators in various configurations and for many potential applications ranging from automation to automobile and medical industry. In this study, we present a cross-linkable liquid rubber composition where amine-catalyzed esterification reactions lead to the formation of a network structure based on anhydride functional isoprene rubber, carboxyl-terminated nitrile-butadiene rubber, and epoxy end-capped prepolymers. The success of this intricate network formation procedure was verified by HR-MAS NMR spectroscopy. The new isoprene-based elastomeric material exhibits actuation-relevant attributes including a low elastic modulus of 0.45 MPa, soft response to an applied load up to a large deformation of 300%, and a dielectric constant value (2.6) higher than the conventional Elastosil silicone (2.2). A dot actuator comprising of an isoprene dielectric elastomer film in unstretched state and carbon paste electrodes was fabricated that demonstrated an electrode deformation of 0.63%, which is nearly twice as high as for the commercial Elastosil 2030 film (∼0.30%) at 5 kV. Compared to the Elastosil silicone film, the enhanced performance is attributed to the low modulus and high dielectric constant value of the new isoprene elastomer.

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Section: Introductionmentioning

confidence: 99%

Network Formation, Properties, and Actuation Performance of Functionalized Liquid Isoprene Rubber

Nirmala Suresh,

Liebscher,

Komber

et al. 2024

ACS Omega

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“…By applying them in a polymer matrix, the problem of poor dispersion of single filler in the matrix can be alleviated, resulting in a better comprehensive performance of the matrix. 20 Thus, the preparation and application of nanocomposite fillers have been rapidly developed and popularized in recent years. Arienzo et al 21 grafted oligomeric silsesquioxane onto silanized SiO 2 and prepared SiO 2 -POSS/SBR composite materials through ectopic blending.…”

Section: Introductionmentioning

confidence: 99%

“…By preparing composite fillers, not only can the advantages of the performance of each component filler be maintained, but also the properties that a single filler does not have can be obtained through the complementary and correlational performance of each component. By applying them in a polymer matrix, the problem of poor dispersion of single filler in the matrix can be alleviated, resulting in a better comprehensive performance of the matrix 20 . Thus, the preparation and application of nanocomposite fillers have been rapidly developed and popularized in recent years.…”

Section: Introductionmentioning

confidence: 99%

“…The addition of POSS enhanced the “viscous region” and aided in creating a tight rubber network. Wang et al 20 prepared an assembly of f‐MoS 2 ‐SiO 2 composite filler with a hierarchical structure, and their collaboration effect improved the filler dispersion. The dielectric constant was also enhanced while enhancing the mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Preparation and characterization of halloysite nanotube‐silica/silicone rubber composites: Effect of HNTs on mechanical and thermal properties

Wang,

Shen,

Wang

et al. 2024

Polymer Composites

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A series of halloysite nanotube‐silica (HNTs‐SiO2) nanocomposite fillers were prepared by in‐situ assembly, and a reinforced SiO2/SR composite was obtained by filling them into silicone rubber (SR). The morphology and structural characterization of HNTs‐SiO2 and HNTs‐SiO2/SR and the properties of the HNTs‐SiO2/SR were studied. As a result, the small particle size SiO2 was firmly anchored onto the HNTs surface, and the obtained HNTs‐SiO2 nanofillers were uniformly dispersed in SR. At a 30 phr fixed filler loading, the weakest filler network and the best filler dispersion were obtained when HNTs content in HNTs‐SiO2 was 5%. This resulted in a maximum tensile strength obtained of 6.2 MPa, 1.55 times that of SiO2/SR with the same filler loading, and a maximum elongation at break of 418%, 1.67 times that of the SiO2/SR with the same filler loading, and at the same time the tearing strength and hardness are also improved. Furthermore, the silicone rubber also showed improved thermal stability, with an initial degradation temperature increase of 30°C under a nitrogen atmosphere.Highlights HNTs–SiO2 nanocomposites were successfully prepared by the self‐assembly method and used as fillers in SR as a new type of reinforcing material. The 1D HNTs act as a barrier to prevent SiO2 aggregation and improved fillers dispersion. The elongation at break and tensile strength of 5% HNTs‐SiO2/SR are 67% and 55% higher than those of SiO2/SR, respectively. The silicone rubber also showed improved thermal stability.

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Preparation and mechanical properties of natural rubber composites reinforced by modified molybdenum disulfide

Haq

Zia-Ul-Haq

Jiang

et al. 2023

J of Applied Polymer Sci

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The filler-rubber interaction and filler dispersion in natural rubber (NR) composites are important factors in determining mechanical properties. Herein, Molybdenum disulfide (MoS 2 ) and Al 2 O 3 -coated MoS 2 nanospheres are incorporated in NR/carbon black composites. The effects of MoS 2 and Al 2 O 3 -coated MoS 2 on the morphology, thermal and mechanical properties of the NR composites are investigated. The morphology analysis indicates that Al 2 O 3 -coated MoS 2 could greatly improve the dispersion of carbon black in NR composites. MoS 2 filler and carbon black show a synergetic effect on improving the properties of NR composites, leading to high abrasion resistance, tensile strength, elongation at break and expected dynamic mechanical properties. The thermal conductivity of NR composites increases with increasing the content of MoS 2 and Al 2 O 3 -coated MoS 2 . The thermal stability of the NR composites is also effectively improved by filling MoS 2 and Al 2 O 3 -coated MoS 2 . Furthermore, a small amount of Al 2 O 3 -coated MoS 2 significantly improves the abrasion resistance, wet grip and decreases rolling resistance of the composites. Al 2 O 3 -coated MoS 2 exhibits its potential application in green tires with good performance.

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Oriented molybdenum disulfide-silica/hydrogenated nitrile butadiene rubber composites: Effects of nanosheets on mechanical and dielectric properties

Cited by 5 publications

References 50 publications

Network Formation, Properties, and Actuation Performance of Functionalized Liquid Isoprene Rubber

Network Formation, Properties, and Actuation Performance of Functionalized Liquid Isoprene Rubber

Preparation and characterization of halloysite nanotube‐silica/silicone rubber composites: Effect of HNTs on mechanical and thermal properties

Preparation and mechanical properties of natural rubber composites reinforced by modified molybdenum disulfide

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