Structure-property behavior of novel Ti/poly(tetramethylene oxide) (PTMO) and Zr/PTMO hybrid CERAMER materials prepared by the sol gel method

Brennan, Anthony B.; Wang, B.; Rodrigues, D. E.; Wilkes, Garth L.

doi:10.1007/bf00701317

Cited by 37 publications

(20 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fractions of more than 50 vol% are not uncommon. Such high ceramics loadings of the polymer lead to a disadvantageous increase in elastic moduli of the composites 14…”

Section: Introductionmentioning

confidence: 99%

High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler

Molberg

Crespy

Rupper

et al. 2010

Adv Funct Materials

267

215

View full text Add to dashboard Cite

A novel method allowing rapid production of reliable composites with increased dielectric constant and high dielectric strength for dielectric elastomer actuators (DEA) is reported. The promising approach using composites of conductive particles and insulating polymers generally suffers from low breakdown fields when applied to DEA devices. The present publication shows how to overcome this deficiency by using conductive polyaniline (PANI) particles encapsulated into an insulating polymer shell prior to dispersion. PANI particles are encapsulated using miniemulsion polymerization (MP) of divinylbenzene (DVB). The encapsulation process is scaled up to approximately 20 g particles per batch. The resulting particles are used as high dielectric constant (ϵ′) fillers. Composites in a polydimethylsiloxane (PDMS) matrix are prepared and the resulting films characterized by dielectric spectroscopy and tensile tests, and evaluated in electromechanical actuators. The composite films show a more than threefold increase in ϵ′, breakdown field strengths above 50 V μm−1, and increased strain at break. These novel materials allow tuning the actuation strain or stress output and have potential as materials for energy harvesting.

show abstract

“…Fractions of more than 50 vol% are not uncommon. Such high ceramics loadings of the polymer lead to a disadvantageous increase in elastic moduli of the composites 14…”

Section: Introductionmentioning

confidence: 99%

High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler

Molberg

Crespy

Rupper

et al. 2010

Adv Funct Materials

267

215

View full text Add to dashboard Cite

show abstract

“…It was later verified by small angle Xray scattering (SAXS) data that the morphology of these materials was relatively homogeneous with no major phase separation (25,26,27). Unfortunately, the PDMS-TEOS hybrid materials did not provide adequate tensile properties.…”

Section: Acid and Base Catalysis Within An Organic Matrixmentioning

confidence: 93%

Inorganic/Organic Hybrid Coatings

Soucek

2006

Hybrid Materials

View full text Add to dashboard Cite

“…The composites of polymers with phthalocyanines are influenced by the humidity in the air [15], the composites with ceramics require a large volume fraction of ceramic, which increases too much the value of the Young modulus [16] and in the composites with conductive fillers as the filler concentration approaches the percolation threshold the conductivity and loss factor values increase very much, affecting the behaviour of the membrane [17]. Conductive metal particle fillers have some other unwanted characteristics: high values of Young modulus, thus stiffening the membrane in which they are used, and the high density of metal nanoparticles reduces the weight saving advantage of dielectric elastomers in comparison with mechanical actuation and energy harvesting [18].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Dielectric elastomers based on silicones filled with transitional metal complexes

Ştiubianu¹,

Soroceanu²,

Varganici³

et al. 2016

Composites Part B: Engineering

View full text Add to dashboard Cite

Please cite this article as: Ştiubianu G, Soroceanu A, Varganici C-D, Tugui C, Cazacu M, Dielectric elastomers based on silicones filled with transitional metal complexes, Composites Part B (2016), Abstract New composite dielectric elastomers with improved dielectric properties were prepared on the basis of polydimethylsiloxane rubber filled with new types of metal (Mn, Fe, Cr) complexes of the bisazomethine derived from the condensation of a siloxane diamine, 1,3-bis(aminopropyl)tetramethyldisiloxane, with 3,5-di-bromo-2-hydroxybenzaldehyde. The tetramethyldisiloxane fragment from the structure of the complexes creates the premise for a good compatibility with the silicone matrix without the need for other surface treatments while the complexed metal unit through its polar character changes the dielectric properties of the material. The resulted composites crosslinked at room temperature as dielectric elastomer films were investigated in order to establish if such materials are suitable for use in the structure of electromechanical devices.The introduction of metal complexes in the polymer matrix has led to a slight decrease of the elastic domain but increased the relative dielectric permittivity with up to 100% and the electromechanical sensitivity of the materials, with negligeable changes of the thermal behavior and overall moisture sorption capacity, thus preserving the chemical stability and hydrophobic character of siloxanes.

show abstract

Structure-property behavior of novel Ti/poly(tetramethylene oxide) (PTMO) and Zr/PTMO hybrid CERAMER materials prepared by the sol gel method

Cited by 37 publications

References 14 publications

High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler

High Breakdown Field Dielectric Elastomer Actuators Using Encapsulated Polyaniline as High Dielectric Constant Filler

Inorganic/Organic Hybrid Coatings

Dielectric elastomers based on silicones filled with transitional metal complexes

Contact Info

Product

Resources

About