Results 61 to 70 of about 1,588 (287)

ADN – THE NEW OXIDIZER AROUND THE CORNER FOR AN ENVIRONMENTALLY FRIENDLY SMOKELESS PROPELLANT. doi:10.5028/jatm.2009.0102153160

Journal of Aerospace Technology and Management, 2011
The search for a smokeless propellant has encouraged scientists and engineers to look for a chlorine-free oxidizer as a substitute for AP (ammonium perchlorate).
Márcio Y. Nagamachi, José Irineu S. Oliveira, Aparecida M. Kawamoto, Rita de Cássia L. Dutra   +3 more
doaj  

Development and Characterization of Hydrogen Peroxide Gels with Organic Gelling Agents for Use with Microencapsulated Fuels

Aerospace
Hydrogen peroxide is a promising oxidizer and monopropellant for space propulsion, offering a green alternative to conventional propellants. In combination with microencapsulated hydrocarbon fuels, a new type of monopropellant can be formed that unites ...
Robin Scholl, Eva Steinmann, Dominic Freudenmann, Stefan Schlechtriem   +3 more
doaj   +1 more source

Mechanisms of Degradation in Li‐Ion Batteries Under Low Temperature Exposures

Advanced Functional Materials, EarlyView.
Low‐temperature exposures, or freeze‐thaw cycles, are observed to significantly accelerate the degradation of Li‐ion batteries. A combination of electrolyte phase separation and mechanochemical stress leads to reversible and irreversible performance losses.
Mihir Ojha, Shervin Alaei, Jayanth Ramamurthy, Luke P. Lounsbury, Md Mahdi Ul Ishtiaque, Stuart Leland, Niraj P. Atale, Sourav Das, Siddhartha Pathak, Pranav Shrotriya, Steve W. Martin, Todd A. Kingston, Cary L. Pint   +12 more
wiley   +1 more source

Performance Evaluation of Ammonium Dinitramide-Based Monopropellant in a 1N Thruster

Aerospace
The development of propulsion systems based on green propellants, as an alternative to hydrazines, has been gaining interest within the space community.
Wonjae Yoon, Vikas Khandu Bhosale, Hosung Yoon   +2 more
doaj   +1 more source

Interaction‐Driven Assembly Pathways in Heterogeneous Active Microrobotic Systems

Advanced Functional Materials, EarlyView.
Peanut‐ and cube‐shaped light‐powered microrobots exhibit distinct magnetic and photocatalytic responses that determine their heterogeneous self‐assembly. In the dark, magnetic dipole interactions drive colloidal copolymerization with cubes acting as nucleation centers, whereas under light irradiation, phoretic interactions compete with magnetic ...
Domenico Calabrò, Roshan Velluvakandy, Martin Pumera, Francesco Priolo, Salvo Mirabella, Mario Urso   +5 more
wiley   +1 more source

Enhanced thermal performance and hydrochloric acid gas (HCl) emission mitigation in ammonium perchlorate (AP)-Based solid propellants with potassium permanganate (KMnO4)/AP dual oxidisers

Atmospheric Environment: X
The conventional propellant used in rocket boosters and tactical missiles commonly utilises ammonium perchlorate (AP). However, the release of harmful chloride fumes resulting from the combustion of AP during rocket launches contributes to a 1 % increase
Izzat Najmi Yaacob, Ezanee Gires, Adi Azrif Basri, Kamarul Arifin Ahmad, Kamsani Kamal, Nor Afizah Salleh, Suraya Shahedi, Fikri Rasih, Zakwan Azizi, Sharul Sham Dol, Norkhairunnisa Mazlan   +10 more
doaj   +1 more source

Molecular Rotors: From Newtonian Fluids to Functional Materials as Viscosity and Temperature Sensing Tools

Advanced Functional Materials, EarlyView.
Molecular rotors are fluorescent molecules that are sensitive to viscosity and temperature variations in the environment. They exhibit a direct correlation between fluorescence and viscosity within Newtonian fluids. However, this correlation becomes less straightforward in complex systems.
Flavia Di Scala, Alice Briole, Valerii Myndrul, Thomas J. Cleij, Hanne Diliën, Bérengère Abou, Bart van Grinsven   +6 more
wiley   +1 more source

Rapid Fabrication of Self‐Propelled and Steerable Magnetic Microcatheters for Precision Medicine

Advanced Materials, EarlyView.
A rapid Joule heating fabrication method for the production of self‐propelling, adaptive microcatheters, with tunable stiffness and integrated microfluidic channels is presented. Demonstrated through three microrobotic designs, including a steerable guiding catheter, an untethered wave‐crawling TubeBot, and a distal‐end propelled microcatheter, it was ...
Zhi Chen, Boris Rivkin, David Castellanos‐Robles, Ivan Soldatov, Lukas Beyer, Mariana Medina‐Sánchez   +5 more
wiley   +1 more source

Investigation of Combustion Performance of Hypergolic Ionic Liquid Fuels Through Injector Design

Aerospace
Hypergolic ionic liquid fuels are promising alternatives to the toxic hydrazine-based propellants. The present study investigates the combustion performance of a fuel composed of 1-ethyl-3-methylimidazolium thiocyanate ([EMIM][SCN]) and copper(I ...
Vikas Khandu Bhosale, Keonwoong Lee, Vincent Mario Pierre Ugolini, Hosung Yoon   +3 more
doaj   +1 more source

Dynamics of electrically controlled propellant valves for “green”-propellant thrusters

Technical mechanics
Recently, the leading space countries have paid much attention to searching for and using new types of untoxic “green” propellants. Developments of 0.1 N to 220 N “green”-propellant thrusters have been reported, and some of them have been successfully tested in flight conditions.
openaire   +1 more source