The mini-generator of electrical energy exploiting Marangoni soluto-capillary flows is reported. The interfacial flows are created by molecules of camphor emitted by the "camphor engines" placed on floating polymer rotors bearing permanent magnets. Camphor molecules adsorbed by the water/vapor interface decrease its surface tension and create the stresses resulting in the rotation of the system. The alternative magnetic flux in turn creates the current in the stationary coil. The long-lasting nature of rotation (approximately 10-20 h) should be emphasized. The brake-specific fuel consumption of the reported generator is better than that reported for the best reported electrical generators. Various engineering implementations of the mini-generator are reported.
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http://dx.doi.org/10.1021/acsomega.9b02257 | DOI Listing |
ACS Omega
September 2019
Engineering Faculty, Chemical Engineering, Biotechnology and Materials Department and Engineering Faculty, Industrial Engineering and Management Department, Ariel University, P. O. B. 3, 407000 Ariel, Israel.
The mini-generator of electrical energy exploiting Marangoni soluto-capillary flows is reported. The interfacial flows are created by molecules of camphor emitted by the "camphor engines" placed on floating polymer rotors bearing permanent magnets. Camphor molecules adsorbed by the water/vapor interface decrease its surface tension and create the stresses resulting in the rotation of the system.
View Article and Find Full Text PDFChem Asian J
July 2019
State Key Laboratory of Chemical Resource Engineering and State Key Laboratory of Organic-Inorganic Composites, Beijing University of Chemical Technology, Beijing, 100029, China.
Mini-generators based on locomotion of small objects have aroused widespread attention because of their potential application in powering small-scale electronic devices. Although improvements have been made in the development of mini-generators, there are still some key challenges such as low power output and energy conversion efficiency, which limit the potential application of mini-generators. Herein, through integrating a superhydrophobic surface, chemical reaction and solenoid coil/magnet into a system, an innovative mini-generator is designed, which can convert chemical energy into electrical energy through mechanical form.
View Article and Find Full Text PDFAdv Healthc Mater
April 2019
Beijing Laboratory of Biomedical Materials and Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Most implantable devices rely on a power supply from batteries and require replacement surgeries once the batteries run low. Mini-generators that harvest intracorporeal energy available in the human body are promising replacements of batteries and prolong the lifetime of implantable devices, thus reducing surgery pain, risks, and cost. Although various sources of energy available in the human body are used for electricity generation using piezoelectric and triboelectric materials or intravascular turbines, concerns about material durability or thrombus risks remain, and developing novel strategies to fabricate a mini-generator to harvest the intracorporeal energy is still challenging.
View Article and Find Full Text PDFAdv Mater
July 2018
State Key Laboratory of Chemical Resource Engineering, Beijing Laboratory of Biomedical Materials, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China.
Mini-generators converting other forms of energy into electric energy are ideal power supplies for widely used microelectronic devices because they need only a low power supply in the range of µW to mW. Among various creative strategies to fabricate mini-generators, recently developed functionally integrated systems combining self-propulsion of small objects and the application of Faraday's law show advantages such as facile, noncontact, low resistance, and durability. However, wide application of such functionally integrated systems is currently restricted by artificial energy inputs, such as chemical fuels or mechanical work, and harvesting energy available in the environment or nature is urgently required.
View Article and Find Full Text PDFNitric Oxide
May 2018
Anesthesia Center for Critical Care Research, Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA; Division of Rheumatology, Allergy and Clinical Immunology, Department of Medicine, Massachusetts General Hospital, Harvard Medical School, Boston, MA, 02114, USA. Electronic address:
Objectives: To test the safety of a novel miniaturized device that produces nitric oxide (NO) from air by pulsed electrical discharge, and to demonstrate that the generated NO can be used to vasodilate the pulmonary vasculature in rabbits with chemically-induced pulmonary hypertension.
Study Design: A miniature NO (mini-NO) generator was tested for its ability to produce therapeutic levels (20-80 parts per million (ppm)) of NO, while removing potentially toxic gases and metal particles. We studied healthy 6-month-old New Zealand rabbits weighing 3.
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