PDF Publication Title:
Text from PDF Page: 003
Materials 2020, 13, 4980 3 of 12 2. Experimental 2.1. Materials Thermoplastic elastomer styrene-ethylene/butylene-styrene (SEBS) copolymer (Calprene CH-6120, Madrid, Spain) with an ethylene-butylene/styrene ratio of 68/32 was supplied by Dynasol Gestión, S.I. (Madrid, Spain). Commercial polyvinylidene fluoride (PVDF) (Solef 6010), with density of 1.75 g/cm3 was supplied by Solvay (Paris, France). The solvent used to process SEBS was cyclopentyl methyl ether (CPME) supplied by Carlo Erba Reagents (Val de Reuil, France) (density of 0.86 g/cm3 at 20 ◦C; boiling point of 106 ◦C) and for PVDF, it was N,N-dimethylformamide (DMF, 99.5%) from Merck (Darmstadt, Germany). A commercial sheet of PVDF (PVDF-c) with 1 mm of thickness was obtained from Swami Plast Industries (Gujarat, India) and Mica, Kapton and polyurethane (PU) were obtained from Agar Scientific (Essex, UK), Dupont (Faro, Portugal) and SWM-Engineered (Genk, Belgium), respectively. Polyamide 66 and polypropylene (PP) pellets were purchased from Merck (Sigma-Aldrich, St. Louis, MO, USA). For the preparation of the polymer composite, barium titanate (BT), particles with an average size of 100 nm and a dielectric constant of 150 were obtained from Merck (Sigma-Aldrich, St. Louis, MO, USA). 2.2. Sample Preparation Three types of different processed materials were investigated: solvent cast films for pristine polymers and polymer composite with BT, hot pressing and commercial polymers in sheet form. The solvent casting method was similar for SEBS, PVDF and composites with solvent/polymer ratio of 80/20 v/v using about 1 g of polymer for 5 mL of solvent. For the SEBS dissolution, CMPE was used as the solvent, while DMF was used for the PVDF. Once the corresponding amount of polymer and solvent were added, the mixture was magnetically stirred for 3 h at 30 ◦C until complete polymer dissolution. For the PVDF composite, the corresponding amount of BT nanoparticles (30 weight percentage (wt.%) to maximize dielectric response were maintaining mechanically flexible films [23]) were homogeneously dispersed in DMF in an ultrasonic bath at 25–35 ◦C for 2 h, then the PVDF was added and the mixture was magnetically stirred for 3 h at 30 ◦C. Thin films were obtained by spreading the mixtures on a clean glass substrate using the doctor blade technique with a 200 μm blade thickness. SEBS samples were dried at 30 ◦C for 12 h, whereas PVDF samples were melted in an oven at 210 ◦C for 20 min and recrystallized by cooling down to room temperature, promoting the crystallization of the PVDF in the α-phase and achieving complete solvent evaporation [24–26]. The different processed samples are represented in Table 1. The thicknesses of the films after complete evaporation of the solvent ranged from 40 to 60 μm. The use of solvents was avoided in PA66 and PP, positive and negative triboelectric materials, respectively (Table 1). Both polymers were produced by the hot pressing method where 20 g of polymer pellets were placed in a hot-pressing machine (from Metalgrado LDA, Porto, Portugal) for 15 min at a temperature of 220 ◦C between two 40 × 40 cm sheets of Teflon. After removing, the film thickness was about 1 ± 0.1 mm. Commercial films of different materials, including Mica, PVDF-c, PU and Kapton, with a thickness of about 1 mm, were also used. Samples produced by solvent casting and hot pressing and commercially available materials were also evaluated and compared. In this way, some of the most interesting triboelectric polymers have been comparatively evaluated to understand and optimize triboelectric output. In order to collect the charge provided by the triboelectric effect, conductive silver ink (Electronic 131 paste DT1201, hunan LEED electronics Ink, Zhuzhou, China) was deposited on the outer surface of each material within a home-made screen-printing set-up using a squeegee over the screen placed at 1 mm distance from the substrate. After the printing step, the material and silver ink were dried at 60 ◦C for 60 min in an oven (Binder E, model 28, Binder, Tuttlingen, Germany). The printed electrodePDF Image | Triboelectric Energy Harvesting vs Polymer-Based Materials
PDF Search Title:
Triboelectric Energy Harvesting vs Polymer-Based MaterialsOriginal File Name Searched:
materials-13-04980-v2.pdfDIY PDF Search: Google It | Yahoo | Bing
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
IT XR Project Redstone NFT Available for Sale: NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Be part of the future with this NFT. Can be bought and sold but only one design NFT exists. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Turbine IT XR Project Redstone Design: NFT for sale... NFT for high tech turbine design with one part 3D printed counter-rotating energy turbine. Includes all rights to this turbine design, including license for Fluid Handling Block I and II for the turbine assembly and housing. The NFT includes the blueprints (cad/cam), revenue streams, and all future development of the IT XR Project Redstone... More Info
Infinity Turbine ROT Radial Outflow Turbine 24 Design and Worldwide Rights: NFT for sale... NFT for the ROT 24 energy turbine. Be part of the future with this NFT. This design can be bought and sold but only one design NFT exists. You may manufacture the unit, or get the revenues from its sale from Infinity Turbine. Royalties go to the developer (Infinity) to keep enhancing design and applications... More Info
Infinity Supercritical CO2 10 Liter Extractor Design and Worldwide Rights: The Infinity Supercritical 10L CO2 extractor is for botanical oil extraction, which is rich in terpenes and can produce shelf ready full spectrum oil. With over 5 years of development, this industry leader mature extractor machine has been sold since 2015 and is part of many profitable businesses. The process can also be used for electrowinning, e-waste recycling, and lithium battery recycling, gold mining electronic wastes, precious metals. CO2 can also be used in a reverse fuel cell with nafion to make a gas-to-liquids fuel, such as methanol, ethanol and butanol or ethylene. Supercritical CO2 has also been used for treating nafion to make it more effective catalyst. This NFT is for the purchase of worldwide rights which includes the design. More Info
NFT (Non Fungible Token): Buy our tech, design, development or system NFT and become part of our tech NFT network... More Info
Infinity Turbine Products: Special for this month, any plans are $10,000 for complete Cad/Cam blueprints. License is for one build. Try before you buy a production license. May pay by Bitcoin or other Crypto. Products Page... More Info
| CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com | RSS | AMP |