Results 41 to 50 of about 6,997 (257)

Tribological Performance of Glycerol-Based Hydraulic Fluid Under Low-Temperature Conditions

Lubricants
This study evaluated the tribological performance of a glycerol-based hydraulic fluid as a green alternative to conventional mineral-based hydraulic lubricants under low-temperature conditions, down to −20 °C.
Paul Okhiria, Marcus Björling, Pontus Johansson, Mushfiq Hasan, Roland Larsson, Yijun Shi   +5 more
doaj   +1 more source

GREEN SUPPLY CHAIN PRACTICES FRAMEWORK FOR PETROCHEMICALS IN EGYPT

Renewable Energy and Sustainable Development, 2020
The aim of this study is to determine the extent of green supply chain management (GSCM) practices used by Shell and Co-operation (Co-op) Petroleum Companies in Egypt and to evaluate the effect of GSCM practices on the operational performance of both ...
Karim Soliman, Ghada El-Kady
doaj   +1 more source

Electrified Damage in Motion Systems

Advanced Engineering Materials, EarlyView.
The electrified damage in motion systems is a fundamental framework presenting the degradation pathway arising from the coupling of electrical energy transport with mechanical contact and interfacial chemistry. The framework positions electrified damage as a distinct degradation regime with unique characteristic surface morphologies and failures of ...
M. Humaun Kabir, Angelina Nguyen, Hong Liang   +2 more
wiley   +1 more source

Influence of graphene reinforced sunflower oil on thermo-physical, tribological and machining characteristics of inconel 718

Journal of Materials Research and Technology, 2021
Owing to the extreme heat generated during Inconel 718 machining, the application of a minimum quantity lubrication (MQL) strategy is restricted to mild cutting conditions.
Mohd Danish, Munish Kumar Gupta, Saeed Rubaiee, Anas Ahmed, Murat Sarikaya   +4 more
doaj   +1 more source

Hybrid Metal–Carbon Ink for Printed Stretchable Temperature Sensors

Advanced Engineering Materials, EarlyView.
We prepare conductive inks for temperature sensing with silver flakes and carbon or graphite flakes in a silicone elastomer matrix. Silver dominates the temperature‐dependent conductivity, while the carbon filler network ensures the stability of the conductive pathways and retains function under strain.
Makara Lay, Xue Bai, Thomas Kister, Tobias Kraus   +3 more
wiley   +1 more source

Joints are not lubricated in the way Greene et al. say they are [PDF]

Proceedings of the National Academy of Sciences, 2011
If cartilage is exposed to fluid for a long time and is then loaded, Greene et al. (1) state, “Consistent with previous reports …, an initially low, but temporally increasing friction force characteristic of elastohydrodynamic lubrication (EHL) maintained by a fluid pressurization mechanism was observed.
openaire   +2 more sources

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

Hydrogen-bond regulated NADES lubricants enable ultra-low wear in high-speed ball screw pairs

Mechanics & Industry
Ball screw pairs are susceptible to severe friction and wear under harsh operating conditions, particularly high loads and high speeds, which compromise positioning accuracy and transmission stability.
Yuan Lei, Wang Zhaoyang, Zhou Changguang, Fillon Michel, Wang Meng, Wang Yibiao, Wentao Bi, Zhang Wenling   +7 more
doaj   +1 more source

Surprising Water Slipping Performance on Highly Hydrophilic PEG‐Derived Monolayer‐Covered Surfaces: Preparation, Mechanism, and Application

Advanced Functional Materials, EarlyView.
Highly hydrophilic surfaces (water contact angle, ≈17.7°) exhibiting surprising water slipping performance (sliding angle, ≈7.3°) are successfully prepared via simple chemisorption of polyethylene glycol (PEG) organosilane and subsequent alkali‐treatment.
Hyeonjin Kim, Kouki Akaike, Jerred Wassgren, Hiroshi Kakiuchida, Masahisa Okada, Atsushi Hozumi   +5 more
wiley   +1 more source

Sustainable Electrochemical Synthesis of High‐Quality MXenes: Mechanistic Insights, Applications, Challenges, and Technological Prospects

Advanced Functional Materials, EarlyView.
Electrochemical etching provides an eco‐friendly alternative to hazardous HF methods for MXene production. This approach facilitates the selective isolation of the A‐layer from MAX phases with tunable surface terminations. Controlling voltage, electrolytes, temperature, and duration enables the optimal structural integrity. Nevertheless, existing scale
Jagdeep Singh, Madhusudhana M Devadiga, Santosh K. Tiwari, AS Dhaliwal, Gurpreet Singh Selopal   +4 more
wiley   +1 more source