The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Mobile microrobots are typically fabricated in a multi-step microfabrication process and then transported into an enclosed workspace for operation. This paper presents a new, 3D printing inspired method for in-situ fabrication of mobile magnetic microrobots with complex topology from a polymer filament on demand directly inside an enclosed operational environment. Through the use of a tip magnet on...
Thermoforming is one of the most versatile and economical processes available for polymer products. The cooling process is one of the key processes of thermoforming which effects to quality of final products. In this study, two kinds of 1-d analysis models were developed under the condition of checking the possibility of changing a 2-d to a 1-d problem in a previous study. At first, a model for stability...
Composite samples of low-density polyethylene (LDPE)/ nano-SiO2 and LDPE/ micro-SiO2 were prepared with a method of double-solution mixture, respectively. Depolarization currents of all samples were investigated with thermally-stimulated current. It is found that the currents of both composites increase with the loading level of nano-SiO2 and/or micro-SiO2, and the peak width of each composite is...
Double-solution mixture method was employed in the preparation of the composite of low density polyethylene/Nano-silver. Space charge distributions in samples with different nano-silver concentrations were measured using the pulsed electro-acoustic (PEA) method. In the experiment, samples were tested under three different levels of electrical stress, respectively: 10kV/mm, 30kV/mm and 50kV/mm. Discharge...
Nano-SiO2/ low density polyethylene composite and micro-SiO2/ LDPE composite were prepared via a method of double-solution mixture. The discharging current of all samples after being prestressed at a DC electric field were recorded via Keithley 6517A. Currents of the both composites are less than those of pure LDPE. In addition, the curve shape of the nanocomposite is different from that of pure LDPE...
High field conduction of the composite of nano Ag/low-density polyethylene (LDPE) and pure polyethylene is studied, as well as the effect of the contents of nano Ag on high field conduction. Schottky effect, Poole-Frenkel effect, space-charge-limited conduction (SCLC), and ion hopping conduction are used to fit the results. It is pointed out that both space-charge-limited conduction and Poole-Frenkel...
We investigated the influence of the surface modification of Al nanoparticles on the electrical conduction of polyethylene composites. Octyl-trimethoxysilane was used as a coupling agent for the treatment of Al nanoparticle. It was found that the incorporation of octyl groups onto the surface of Al nanoparticle altered the time dependence behaviors of polarization and depolarization current and increased...
The composite of nano-SiOx and low-density polyethylene is prepared with the double-solution method. Charging currents of the composite at different dc stress, as well as discharging currents, are recorded with Keithley 6517A. It is found that the curves of charging and discharging currents increase with electrical field. Transferring those charging and discharging currents from time domain into frequency...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.