scholarly journals Effect of Diatomaceous Biosilica and Talc on the Properties of Dielectric Elastomer Based Composites

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5828
Author(s):  
Ewa Olewnik-Kruszkowska ◽  
Weronika Brzozowska ◽  
Arkadiusz Adamczyk ◽  
Magdalena Gierszewska ◽  
Izabela Wojtczak ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Environmentally Friendly ◽  
Polymeric Materials ◽  
Dielectric Elastomer ◽  
Thermal And Mechanical Properties ◽  
Valuable Source ◽  
Natural Fillers

Currently, scientists are still looking for new polymeric materials characterized by improved mechanical, thermal as well as dielectric properties. Moreover, it should be stressed that new composites should be environmentally friendly. For this reason, the aim of this work is to establish the influence of natural fillers in the form of diatomaceous biosilica (B) and talc (T) on the properties of dielectric elastomer (DE)-based composites. The dielectric elastomer-based materials have been tested taking into account their morphology, thermal and mechanical properties. Moreover, the dielectric constant of the obtained materials was evaluated. Obtained results revealed that the presence of both diatomaceous biosilica and talc significantly increases dielectric properties while having no significant effect on the mechanical properties of the obtained composites. It should be stressed that the performed analyses constitute a valuable source of knowledge on the effective modification of the thermal and dielectric properties of newly obtained materials.

scholarly journals Preparation and Characterization of CCTO/PDMS Dielectric Elastomers with High Dielectric Constant and Low Dielectric Loss

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1075
Author(s):  
Wenqi Wang ◽  
Guanguan Ren ◽  
Ming Zhou ◽  
Wei Deng
Keyword(s):  
Mechanical Properties ◽  
Dielectric Constant ◽  
Elastic Modulus ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Electric Field ◽  
Polymer Material ◽  
Dielectric Elastomer ◽  
Electroactive Polymer ◽  
Dielectric Elastomers

Dielectric elastomer (DE) is a type of electric field type electroactive polymer material that can produce greater deformation under the action of an electric field and has a faster recovery speed. It has the advantages of high energy density, large strain, low quality, and commercialization, and has become the most widely concerned and researched electroactive polymer material. In this study, copper calcium titanate (CCTO) particles with a large dielectric constant were selected as the filling phase, and a silicone rubber (PDMS) with better biocompatibility and lower elastic modulus was used as the matrix to prepare CCTO/PDMS, which is a new type of dielectric elastomer material. The structure of the dielectric elastomer is analyzed, and its mechanical properties, dielectric properties, and driving deformation are tested. Then, KH550, KH560, and KH570 modified CCTO is used in order to improve the dispersibility of CCTO in PDMS, and modified particles with the best dispersion effect are selected to prepare dielectric elastomer materials. In addition, mechanical properties, dielectric properties, and driving deformation are tested and compared with the dielectric elastomer material before modification. The results show that as the content of CCTO increases, the dielectric constant and elastic modulus of the dielectric elastomer also increase, and the dielectric loss remains basically unchanged at a frequency of 100 Hz. When the filling amount reaches 20 wt%, the dielectric constant of the CCTO/PDMS dielectric elastomer reaches 5.8 (100 Hz), an increase of 120%, while the dielectric loss at this time is only 0.0038 and the elastic modulus is only 0.54 MPa. When the filling amount is 5 wt%, the dielectric elastomer has the largest driving deformation amount, reaching 33.8%. Three silane coupling agents have been successfully grafted onto the surface of CCTO particles, and the KH560 modified CCTO has the best dispersibility in the PDMS matrix. Based on this, a modified CCTO/PDMS dielectric elastomer was prepared. The results show that the improvement of dispersibility improves the dielectric constant. Compared with the unmodified PDMS, when the filling content is 20 wt%, the dielectric constant reaches 6.5 (100 Hz). Compared with PDMS, it has increased by 150%. However, the improvement of dispersion has a greater increase in the elastic modulus, resulting in a decrease in its strain parameters compared with CCTO/PDMS dielectric elastomers, and the electromechanical conversion efficiency has not been significantly improved. When the filling amount of modified CCTO particles is 5 wt%, the dielectric elastomer has the largest driving deformation, reaching 27.4%.

scholarly journals Comparison of How Graphite and Shungite Affect Thermal, Mechanical, and Dielectric Properties of Dielectric Elastomer-Based Composites

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 152
Author(s):  
Ewa Olewnik-Kruszkowska ◽  
Arkadiusz Adamczyk ◽  
Magdalena Gierszewska ◽  
Sylwia Grabska-Zielińska
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Filler Content ◽  
Dielectric Elastomer ◽  
Force Microscopy ◽  
Atomic Force ◽  
Thermal Stability Of ◽  
Scanning Electron

The aim of this work involved comparing the effect graphite and shungite have on the properties of dielectric elastomer-based materials. For this reason, dielectric elastomer–Sylgard (S) was filled with 1, 3, 5, 10, and 15 wt.% of graphite (G) and shungite (Sh). The structure of the obtained materials was studied by means of scanning electron microscopy and atomic force microscopy. The influence of the introduced additives on the thermal stability of the obtained composites was evaluated using thermogravimetry. Moreover, the mechanical properties and the dielectric constant of the elastomer with an addition of graphite and shungite were determined. Obtained results allowed us to establish that the presence of graphite as well as shungite significantly influences mechanical as well as dielectric properties. Additionally, the optimum mass of additives, allowing to increase the dielectric constant without the significant decrease of strain at break, was indicated. In the case of materials containing graphite, regardless of the filler content (1–15 wt.%), the mechanical as well as the dielectric properties are improved, while in the case of composites with an addition of shungite exceeding the 5 wt.% of filler content, a reduced tensile strength was observed.

scholarly journals Improved electromechanical properties of brominated butyl rubber filled with modified barium titanate

RSC Advances ◽  
2017 ◽  
Vol 7 (59) ◽  
pp. 37148-37157 ◽  
Author(s):  
Mengnan Ruan ◽  
Dan Yang ◽  
Wenli Guo ◽  
Shuo Huang ◽  
Yibo Wu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dielectric Constant ◽  
Barium Titanate ◽  
High Dielectric Constant ◽  
Dielectric Elastomer ◽  
Butyl Rubber ◽  
Electromechanical Properties ◽  
Brominated Butyl Rubber ◽  
High Dielectric

Barium titanate (BT) particles, BT-KH570 particles, and polar plasticizer tri-n-butyl phosphate (TBP) were added into BIIR matrix to form a dielectric elastomer composite, which had a high dielectric constant, good mechanical properties, and large actuated strain.

Effect of Functionalized MWCNT on the Mechanical and Dielectric Properties of PMMA Nanocomposites

2018 ◽  
Vol 18 (06) ◽  
pp. 1850035
Author(s):  
Punyapriya Mishra ◽  
Narasingh Deep ◽  
Sagarika Pradhan ◽  
Vikram G. Kamble
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Dielectric Constant ◽  
Tensile Strength ◽  
Electron Microscope ◽  
Dielectric Properties ◽  
Conductive Polymer ◽  
Mechanical Tests ◽  
Surface Structures ◽  
Scanning Electron

Carbon nanotubes (CNTs) are widely explained in fundamental blocks of nanotechnology. These CNTs exhibit much greater tensile strength than steel, even almost similar to copper, but they have higher ability to carry much higher currents, they seem to be a magical material with all these mentioned properties. In this paper, an attempt has been made to incorporate this wonder material, CNT, (with varying percentages) in polymeric matrix (Poly methyl methacrylate (PMMA)) to create a new conductive polymer composite. Various mechanical tests were carried out to evaluate its mechanical properties. The dielectric properties such as dielectric loss and dielectric constant were evaluated with the reference of temperature and frequency. The surface structures were analyzed by Scanning Electron Microscope (SEM).

The effect of bis allyl benzoxazine on the thermal, mechanical and dielectric properties of bismaleimide–cyanate blend polymers

RSC Advances ◽  
2015 ◽  
Vol 5 (72) ◽  
pp. 58821-58831 ◽  
Author(s):  
Yiqun Wang ◽  
Kaichang Kou ◽  
Guanglei Wu ◽  
Ailing Feng ◽  
Longhai Zhuo
Keyword(s):  
Mechanical Properties ◽  
Dielectric Properties ◽  
Polymer Composite ◽  
High Performance ◽  
Cross Linking ◽  
Thermal And Mechanical Properties ◽  
High Performance Polymer ◽  
The Cross

A high-performance polymer composite was fabricated using Bz-allyl/BMI/BADCy resin, in which the BMI/BADCy resin was modified with Bz-allyl to improve its dielectric, thermal and mechanical properties and the cross-linking degree after curing.

Preparation of SiNOf/BN High Temperature Wave-Transparent Composites by Precursor Infiltration and Pyrolysis Method

2012 ◽  
Vol 508 ◽  
pp. 11-16 ◽  
Author(s):  
Feng Cao ◽  
Zhen Yu Fang ◽  
Fei Chen ◽  
Chang Rui Zhang ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dielectric Constant ◽  
Dielectric Properties ◽  
Pyrolysis Temperature ◽  
Temperature Wave ◽  
Densification Behavior ◽  
Pyrolysis Method ◽  
Dielectric Loss Angle ◽  
Different Temperatures ◽  
Transparent Composites

Sino Fibers Reinforced BN Wave-Transparent Composites (SiNOf/BN) Were Fabricated through Precursor Infiltration and Pyrolysis (PIP) Method Using Borazine as Precursor. The Effect of Pyrolysis Temperature on the Densification Behavior, Microstructures, Mechanical Properties and Dielectric Properties of the Composites Was Investigated. The Results Suggest that with the Increase of the Pyrolysis Temperature from 800 °C to 1000 °C, the Density, Mechanical Properties and Dielectric Constant of the Composites Are Increased, but the Infiltration Efficiency Varies Little. At the Pyrolysis Temperature of 1000 °C, the Density of SiNOf/BN Composites is 1.84 g∙cm-3 and the Flexural Strength and Elastic Modulus Are 148.2 MPa and 26.2 GPa Respectively. The Dielectric Properties, Including Dielectric Constant of 3-4 and Dielectric Loss Angle Tangent of below 7×10-3, Obtained at Three Different Temperatures Are Excellent for the SiNOf/BN Composites Applied as Wave-Transparent Materials.

Dielectric Properties Of Low Dielectric Constant Polymeric Materials

1995 ◽  
Vol 381 ◽  
Author(s):  
Flora S. Ip ◽  
Chiu Ting
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
High Performance ◽  
Metal Layer ◽  
Polymeric Materials ◽  
Signal Propagation ◽  
Low Dielectric Constant ◽  
Low Dielectric ◽  
Wide Range ◽  
Metal Insulator Metal

AbstractMultilevel interconnects for high performance ULSI need low dielectric constant materials for inter-metal layer dielectric, or ILD, to reduce signal propagation delay, power consumption and cross talk noises. We have studied the physical, dielectric and processing properties of a wide variety of promising low dielectric polymeric materials for ILD applications. This paper presents capacitance values measured over a wide range of temperature, and a summary of the measured dielectric properties. The anisotropy 1,2 of dielectric properties were determined experimentally, the vertical (out-of-plane) dielectric properties were determined by MIM (Metal-Insulator-Metal) measurements, and the horizontal (in-plane) dielectric properties were determined by intra-line measurements of sub-half micron serpentine and comb test structures.

Naphthalene Containing Polyimide Nanocomposites Hybrid with Organo-Modified Montmorillonite

2006 ◽  
Vol 111 ◽  
pp. 43-46
Author(s):  
B.K. Chen ◽  
S.Y. Tsay ◽  
C.P. Chen
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Dielectric Constant ◽  
Amic Acid ◽  
Aggregate Formation ◽  
Thermal And Mechanical Properties ◽  
Modified Montmorillonite ◽  
Thermal Imidization ◽  
Tetracarboxylic Dianhydride ◽  
Acid Precursor

To improve the thermal and mechanical properties of polyimides, a nanocomposite of naphthalene containing polyimide (PI) was hybridized with Montmorillonite (MMT). The PI was synthesized from a diamine, 2,7-bis (4-aminophenoxy) naphthalene and polymerized with a 3,3’,4,4’-benzophenone tetracarboxylic dianhydride via thermal imidization. PI-MMT nanocomposites were then prepared from a DMAc solution of poly(amic acid) precursor and a DMAc dispersion of MMT which were organo-modified with various amount of n-dodecylamine. Characterization results demonstrated that the introduction of a small amount of MMT (up to 5%) led to enhanced thermal stability and mechanical properties of PI. The 5% weight loss temperature in N2 was increased by 46oC in comparison to pristine PI with an organoclay content of 5%. The CTE and dielectric constant were decreased. However, at organoclay contents higher than 5% these properties were reduced because the organoclay was poorly dispersed and resulted in aggregate formation.

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