Currently used dielectric elastomers do not have the ability to self-heal after detrimental events such as tearing or electrical breakdown, which are critical issues in relation product reliability and lifetime. In this paper, we present a self-healing elastomer that additionally possesses high permittivity consists of an interpenetrating polymer network silicone ionic species cross-linked through proton exchange between amines acids. The ionically provides properties breakdown cuts made...

Alkyl chloride-functional siloxane copolymers are synthesised as the basis for a new soft matrix dielectric elastomers.

An azide-containing, trifunctional vinyl cross-linker for silicone networks has been synthesized. The through Cu(I) catalyzed 1,3-cycloaddition reacted with six different alkyne-containing chemical groups which each possess a particular functionality. functional cross-linkers have utilized to prepare novel polydimethylsiloxane (PDMS) networks. All were successfully incorporated into the and demonstrated be well distributed within PDMS films. This was substantiated by fluorescence microscopy...

Multifunctional siloxane copolymers with terminal vinyl or allyl functional groups are synthesised through the borane-catalysed polycondensation of hydrosilanes and alkoxysilanes. Copolymers varying molecular weights (w = 13 200–70 300 g mol−1), spatially well-distributed high end-group fidelity obtained in a facile robust synthetic scheme involving polycondensation, transformation different functionalisation reactions such as Cu(I)-mediated azide–alkyne cycloaddition. Pendant alkyl...

Dielectric elastomers (DEs), which represent an emerging actuator and generator technology, admittedly have many favourable properties, but their high driving voltages are one of the main obstacles to commercialisation.

The existence of short-chain domains in heterogeneous bimodal PDMS networks has been confirmed visually, for the first time, through confocal fluorescence microscopy. were prepared using a controlled reaction scheme where short chains reacted below gelation point into hyperbranched structures fluorescent silicone compatible cross-linker. formation was by FTIR, 1H-NMR and size exclusion chromatography (SEC). thereafter mixed with long-chain to form within network. average sizes found vary...

Dipole grafted cross-linkers were utilized to prepare polydimethylsiloxane (PDMS) elastomers with various chain lengths and concentrations of functional cross-linker. The prepared by reaction two alkyne-functional dipoles, 1-ethynyl-4-nitrobenzene 3-(4-((4-nitrophenyl)diazenyl)phenoxy)-prop-1-yn-1-ylium, a synthesized silicone compatible azide-functional cross-linker click chemistry. thermal, mechanical electromechanical properties investigated for PDMS films 0 3.6 wt% dipole-cross-linker....

Post curing can be used to facilitate volatile removal and thus produce polydimethylsiloxane (PDMS) films with stable elastic electrical properties over time. In this study, the effect of post was investigated for commercial silicone elastomer thin as a means improving long-term film reliability. The Young's moduli breakdown strengths (silica-reinforced) PDMS films, without additional 35 parts per hundred rubber titanium dioxide (TiO2), were after high-temperature (200°C) various time spans....

Commercial viability of dielectric elastomers (DEs) is currently limited by a few obstacles, including high driving voltages (in the kV range). Driving voltage can be lowered either decreasing Young's modulus or increasing permittivity silicone elastomers, combination thereof. A decrease in modulus, however, often accompanied loss mechanical stability, whereas increases are usually followed large increase breakdown strength and thereby lifetime DE. new soft elastomer matrix, with low aligned...

Dielectric elastomer materials for actuators need to be soft and stretchable while possessing high dielectric permittivity. Soft silicone elastomers can obtained through the use of oils, enhanced permittivity dipolar groups on polymer backbone. Such are prepared by adding fillers a strong relatively stiff elastomer, Elastosil LR3043/50. The long‐term stability is tested straining 60% statically up 3 months. results show that significantly influence elastomers, with electrical breakdown...

There are several cannabidiol (CBD) transdermal patches available on the market. However, none FDA-approved. Furthermore, not much evidence has been published about CBD release and skin permeation from such patches, so effectiveness reliability remain unclear.We aimed to develop a method determine in vitro of using Franz cell diffusion combination with quantitative 1 H-NMR (qNMR).The study was conducted known content six different commercially or market-ready Strat-M™ membrane samples taken...

For improved wound healing, antimicrobial adhesives are one path forward. However, with the current challenge of bacterial resistance, it is essential to choose included drug carefully. Octenidine an obvious choice due its broad efficacy and no reported resistance. In pure form, octenidine complexes efficiently platinum catalyst in silicone composition, inhibiting targeted hydrosilylation reaction hindering curing. This obstacle overcome by screening cyclodextrins homogeneously dispersed...

Abstract Photoreversible, color‐changing films have great potential in various optical applications. In this study, we developed a photochromic film by embedding droplets of metatitanic acid (hydrous TiO 2 ) and glycerol commercially available poly(dimethylsiloxane) (PDMS) silicone elastomers. Benefiting from the electron–hole pair scavenging abilities glycerol, resulting exhibited rapid photoresponse, high photoreversible stability, excellent antiaging capability, remarkable stretchability....

Silicone elastomers have been heavily investigated as candidates for the flexible insulator material in dielectric elastomer transducers and are such almost ideal because of their inherent softness compliance. However, silicone suffer from low permittivity. This shortcoming has attempted optimized through different approaches during recent years. Material optimization with sole purpose increasing permittivity may lead to introduction problematic phenomena premature electrical breakdown due...

Dielectric elastomers (DEs) have many favourable properties. The obstacle of high driving voltages, however, limits the commercial viability technology at present. Driving voltage can be lowered by decreasing Young's modulus and increasing dielectric permittivity silicone elastomers. A decrease in modulus, is often accompanied loss mechanical stability thereby lifetime DE. New soft elastomer matrices with low no stability, were prepared two different approaches using chloropropyl-functional...

The energy density of dielectric elastomers (DEs) is sought increased for better exploitation the DE technology since an means that driving voltage a certain strain can be lowered in actuation mode or alternatively more harvested generator mode. One way to increase permittivity elastomer. A novel silicone elastomer system with high was prepared through development interpenetrating networks from ionically assembled polymers and covalently crosslinked silicones. has many degrees freedom ionic...

Polydimethylsiloxane (PDMS) elastomers are excellent materials for dielectric electroactive polymers (DEAPs) due to their high efficiency and fast response. PDMS suffers, however, from low permittivity voltages therefore required when the material is used DEAP actuators. In order improve properties of a novel system developed where push-pull dipoles grafted new silicone compatible cross-linker. The cross-linkers prepared by reaction two different dipole alkynes as well fluorescent alkyne...

High driving voltages currently limit the commercial potential of dielectric elastomers (DEs). One method used to lower voltage is increase permittivity elastomer. A novel silicone elastomer system with high was prepared through synthesis siloxane copolymers, thereby allowing for attachment molecules copper-catalyzed azide-alkyne 1,3-dipolar cycloaddition (CuAAC). The synthesized copolymers allow a degree chemical freedom, as several parameters can be varied during preparation phase. Thus,...

Abstract Magnetochromic materials change color upon variation in an external magnetic field. A magnetochromic elastomer resulting from the dispersion of nanoparticles (MNPs) a liquid and subsequent emulsification crosslinkable polydimethylsiloxane (PDMS) is presented. The MNPs form rod‐like structures under field, aligning with field allowing light to pass through elastomer. thus changes dark grey transparent/light grey. Polyethylene glycol 200 (PEG200) selected as carrier due faster...

This review aims to provide an overview of the advancements and status clinical studies potential permeation-enhancing strategies in transdermal delivery cannabinoids.