Electrostriction of Dielectric Elastomer Based on Natural Rubber/Graphene Composites for Actuator Applications

The combination of elastic natural rubber (NR) and conductive graphene were assessed for such improved electromechanical properties that are promising material in an actuator applications. For this work, dielectric elastomer composite films were prepared with varied graphene contents. These films were fabricated by solution casting method. The morphology along with electrical and mechanical properties, and specifically the electrostrictive coefficient, were studied. The electrostrictive behavior was determined from electric field induced strain, observed with a photonic displacement apparatus in the film thickness direction. It is shown that the electrostrictive coefficient for the NR/Graphene composite has already raised over 3.7 times compared to the neat natural rubber by the reason of an interfacial polarization. The surface between NR matrix and graphene filler generates the larger permittivity. Meanwhile, the Young's modulus was quite invariant. Consequently, the enlarging of the electrostrictive coefficient under low electric field of the NR/Graphene composites is representing a potentially good actuation response base on the electrostriction phenomena.

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Crystallization and Dielectric Properties of MWCNT /Poly(1-Butene) Composite Films by a Solution Casting Method

Materials ◽

10.3390/ma13030755 ◽

2020 ◽

Vol 13 (3) ◽

pp. 755

Author(s):

Lingfei Li ◽

Qiu Sun ◽

Xiangqun Chen ◽

Yongjun Xu ◽

Zhaohua Jiang

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Dielectric Loss ◽

Breakdown Strength ◽

Composite Films ◽

Conductive Filler ◽

Interfacial Polarization ◽

Solution Casting ◽

Casting Method ◽

Solution Casting Method

In this work, poly(1-butene) (PB-1) composite films with multi-walled carbon nanotubes (MWCNT) were prepared by a solution casting method. The relationship between the dielectric properties and the crystal transformation process of the films was investigated. It was indicated that there were two crystal forms of I and II of PB-1 during the solution crystallization process. With the prolongation of the phase transition time, form II was converted into form I. The addition of the conductive filler (MWCNT) accelerated the rate of phase transformation and changed the nucleation mode of PB-1. The presence of crystal form I in the system increased the breakdown strength and the dielectric constant of the films and reduced the dielectric loss, with better stability. In addition, the dielectric constant and the dielectric loss of the MWCNT/PB-1 composite films increased with the addition of MWCNT, due to the interfacial polarization between MWCNT and PB-1 matrix. When the mass fraction of the MWCNT was 1.0%, the composite film had a dielectric constant of 43.9 at 25 °C and 103 Hz, which was 20 times that of the original film.

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Polyarylene ether nitrile and boron nitride composites: coating with sulfonated polyarylene ether nitrile

e-Polymers ◽

10.1515/epoly-2019-0009 ◽

2019 ◽

Vol 19 (1) ◽

pp. 70-78 ◽

Cited By ~ 6

Author(s):

Renbo Wei ◽

Qian Xiao ◽

Chenhao Zhan ◽

Yong You ◽

Xuefei Zhou ◽

...

Keyword(s):

Thermal Conductivity ◽

Boron Nitride ◽

Composite Films ◽

Solution Casting ◽

Casting Method ◽

Polyarylene Ether Nitrile ◽

Arylene Ether ◽

Ultrasonic Technology ◽

Solution Casting Method ◽

Sulfonated Poly

AbstractBoron nitride (BN) coated with sulfonated poly-arylene ether nitrile (SPEN) (BN@SPEN) was used as additive to enhance the thermal conductivity of polyarylene ether nitrile. BN@SPEN was prepared by coating BN micro-platelets with SPEN through ultrasonic technology combined with the post-treatment bonding process. The prepared BN@SPEN was characterized by FTIR, TGA, SEM and TEM, which confirmed the successful coating of BN micro-platelets. The obtained BN@SPEN was introduced into the PEN matrix to prepare composite films by a solution casting method. The compatibility between BN and PEN matrix was studied by using SEM observation and rheology measurement. Furthermore, thermal conductivity of BN@SPEN/PEN films were carefully characterized. Thermal conductivity of BN@SPEN/PEN films was increased to 0.69 W/(m⋅K) at 20 wt% content of BN@SPEN, having 138% increment comparing with pure PEN.

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Dielectric Properties of CCTO/PVDF Composite Films

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.816-817.276 ◽

2013 ◽

Vol 816-817 ◽

pp. 276-279 ◽

Cited By ~ 4

Author(s):

Fang Fang Wang ◽

Ya Jun Wang ◽

Zhi Bo Ren

Keyword(s):

Dielectric Constant ◽

Dielectric Properties ◽

Composite Films ◽

Solution Casting ◽

Casting Method ◽

Impedance Analyzer ◽

Composite Models ◽

Solution Casting Method ◽

Pvdf Matrix ◽

Ccto Powder

To meet the requirement of microelectronic industry, ceramic/polymer composite films made of CaCu3Ti4O12(CCTO) powder as filler and PVDF copolymer as matrix were prepared by solution casting method. The dielectric properties (DP) and morphology of the films were studied by impedance analyzer and scanning electron microscope (SEM) respectively. The dielectric constant could reach 23.96 and loss 0.1082 when mass fraction of CCTO is 50% at 100 Hz. SEM results show that CCTO particles dispersed well in the PVDF matrix. At last, three composite models were used to predict the dielectric constant of the composite films and it is proved that Yamada model fits the experimental data well.

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Gamma irradiation studies of composite thin films of poly vinyl alcohol and coumarin

RSC Advances ◽

10.1039/c5ra15633e ◽

2016 ◽

Vol 6 (2) ◽

pp. 1554-1561 ◽

Cited By ~ 6

Author(s):

Feroz A. Mir ◽

Adil Gani ◽

K. Asokan

Keyword(s):

Thin Films ◽

Gamma Irradiation ◽

Vinyl Alcohol ◽

Composite Films ◽

Poly Vinyl Alcohol ◽

Solution Casting ◽

Casting Method ◽

Composite Thin Films ◽

Solution Casting Method

Composite films of imperatorin (a coumarin molecule) and poly vinyl alcohol (PVA) are prepared by a solution casting method.

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Preparation and Properties of Poly(L-Lactid Acid)/Organo-Montmorillonite Composites by Solution Casting Method

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.731.578 ◽

2015 ◽

Vol 731 ◽

pp. 578-583

Author(s):

Ming Jun Niu ◽

Rui Xia Duan ◽

Li Xia Wang ◽

Xiao Qing Shen ◽

Kai Guo ◽

...

Keyword(s):

Tensile Strength ◽

Composite System ◽

Composite Films ◽

Solution Casting ◽

Casting Method ◽

Elongation At Break ◽

Steady Level ◽

Solution Casting Method ◽

Degree Of Order ◽

Thermal Stability Of

PLLA / OMMT composite films were prepared through solution casting method, in which chloroform was used as solvent. Mechanical, thermal and crystallization properties of neat PLLA and PLLA / OMMT composites films were investigated as well as morphology through scanning electron microscope. It was shown that tensile strength of PLLA / OMMT composite films gradually increased with increasing OMMT content, but reduced when more filler were added. Loading of 2wt% of OMMT seemed to benifit PLLA in tensile strength most. With the increase of montmorillonite content, the elongation at break of PLLA decreased first and then reached to a steady level. When compared with pure PLLA, the composite system showed decreased spherulite size, lower degree of order and an increase in the number of grains. Thermal analysis has proved that the addition of OMMT greatly enhanced crystability and thermal stability of PLLA.

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Polymer-based composites with improved energy density and dielectric constants by monoaxial hot-stretching for organic film capacitor applications

RSC Advances ◽

10.1039/c5ra05029d ◽

2015 ◽

Vol 5 (64) ◽

pp. 51975-51982 ◽

Cited By ~ 7

Author(s):

Xu Huang ◽

Kai Wang ◽

Kun Jia ◽

Xiaobo Liu

Keyword(s):

Carbon Nanotube ◽

Energy Density ◽

Composite Films ◽

Dielectric Constants ◽

Solution Casting ◽

Organic Film ◽

Casting Method ◽

Multiwalled Carbon ◽

Film Capacitor ◽

Solution Casting Method

Randomly oriented multiwalled carbon nanotube (MWCNT)/polyarylene ether nitrile (PEN) composite films were prepared by a solution casting method.

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The Effect of Stereocomplex Polylactide Particles on the Stereocomplexation of High Molecular Weight Polylactide Blends

Polymers ◽

10.3390/polym13122018 ◽

2021 ◽

Vol 13 (12) ◽

pp. 2018

Author(s):

Muhammad Samsuri ◽

Ihsan Iswaldi ◽

Purba Purnama

Keyword(s):

Mechanical Properties ◽

Molecular Weight ◽

High Molecular Weight ◽

Nucleating Agent ◽

Solution Casting ◽

Casting Method ◽

Crystalline Fraction ◽

Crystalline Structures ◽

Solution Casting Method

Stereocomplexation is one of several approaches for improving polylactide (PLA) properties. The high molecular weight of poly L-lactide (PLLA) and poly D-lactide (PDLA) homopolymers are a constraint during the formation of stereocomplex PLAs (s-PLAs). The presence of s-PLA particles in PLA PLLA/PDLA blends can initiate the formation of s-PLA crystalline structures. We used the solution casting method to study the utilization of s-PLA materials from high molecular weight PLLA/PDLA blends for increasing s-PLA formation. The s-PLA particles initiated the formation of high molecular weight PLLA/PDLA blends, obtaining 49.13% s-PLA and 44.34% of the total crystalline fraction. In addition, the mechanical properties were enhanced through s-PLA crystalline formation and the increasing of total crystallinity of the PLLA/PDLA blends. The s-PLA particles supported initiation for s-PLA formation and acted as a nucleating agent for PLA homopolymers. These unique characteristics of s-PLA particles show potential to overcome the molecular weight limitation for stereocomplexation of PLLA/PDLA blends.

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