Results 61 to 70 of about 169,223 (266)

COFs on MOFs: Layer‐by‐Layer Synthesis of MOF@COF Nanoparticles with Synergistic Adsorption

Advanced Materials, EarlyView.
A layer‐by‐layer strategy enables the growth of crystalline covalent organic framework (COF) shells on metal–organic framework nanoparticles, creating core–shell structures with tunable porosity. Ordered interstitial mesopores are formed during shell growth, which are connected with the COF's intrinsic micropores, thereby enhancing water sorption. This
Ana Guillem‐Navajas, Lucía Torrico‐García‐Viso, Jose Antonio Suárez del Pino, Nekane Aramburu‐Merino, Pilar Segovia, Enrique G. Michel, Josep Puigmartí‐Luis, Enrique Velasco, Pedro Tarazona, Daniel Maspoch, David Rodríguez‐San‐Miguel, Félix Zamora   +11 more
wiley   +1 more source

Topology and Material Optimization in Ultra‐Soft Magneto‐Active Structures: Making Advantage of Residual Anisotropies

Advanced Materials, EarlyView.
Residual magnetization induces pronounced mechanical anisotropy in ultra‐soft magnetorheological elastomers, shaping deformation and actuation even without external magnetic fields. This study introduces a computational‐experimental framework integrating magneto‐mechanical coupling into topology optimization for designing soft magnetic actuators with ...
Carlos Perez‐Garcia, Rogelio Ortigosa, Jesús Martínez‐Frutos, Daniel Garcia‐Gonzalez   +3 more
wiley   +1 more source

Diminishing the mobility ratio and interfacial tension of a tertiary flooded sandstone reservoir using microparticles as a reinforcement agent with biopolymer composite

Journal of Petroleum Exploration and Production Technology
Approaches for enhancing oil recovery are important for maximizing the recovery factor of oil after the vanishing natural pressure of a hydrocarbon reservoir.
Samah A. M. Abou-alfitooh, M. Ramzi, Mostafa G. Temraz, Rasha Hosny, Osama M. Elnaggar   +4 more
doaj   +1 more source

Enhancing oil recovery of ultimate water-cut reservoirs with a novel methane-producing bacterial strain

Shiyou shiyan dizhi
Most of the old oil fields in eastern China are now in the ultra-high water-cut development stage characte-rized by a rapid increase in water-cut, low oil recovery rate and inefficient water flooding.
Mingshan DING, Junzhang LIN, Yun FENG, Nan SUN, Guan WANG, Yan BA, Weidong WANG   +6 more
doaj   +1 more source

Synthesis of an efficient copolymer of acrylamide and acrylic acid and determination of its swelling behavior

Journal of Petroleum Exploration and Production Technology, 2018
The main purpose of this work is to prepare an efficient series of preformed particle gels (PPGs) and to study their behaviors to control unwanted water in oil fields. To this end, 12 copolymer samples composed of acrylamide and acrylic acid [poly(AAm-co-
Samira Heidari, Feridun Esmaeilzadeh, Dariush Mowla, Sohila Ghasemi   +3 more
doaj   +1 more source

Field‐Programmed Anisotropy in Magneto‐Piezoelectric Composites for Material‐Encoded Mechanoperception

Advanced Materials, EarlyView.
Field‐programmed anisotropy imparts material‐level intelligence to soft composites. Magnetic torque dynamics drive magneto‐piezoelectric nanowires from random dispersion into deterministic axial alignment. The resulting hierarchical percolation networks confine electromechanical coupling to specific axes and intrinsically decouple superposed force ...
Yubin Kim, Yumin Kwon, Dabin Kim, Minsun Oh, Jin Young Jung, Dongyeong Gim, Kootak Hong, Jun Yeon Hwang, Sang‐Woo Kim, Minjeong Ha   +9 more
wiley   +1 more source

Experimental Simulation of Proppant Migration for Slick Water With Variable Viscosity During Fracturing

Geofluids
The migration law of proppants in slick water during fracturing is of great significance for field fracturing. A large-scale visualized experimental device was utilized to test sand patterns for varying injection parameter combinations, and sensitivity ...
Guiquan Wang, Jingyuan Zhao, Yuxue Sun, Anqi Shen   +3 more
doaj   +1 more source

Mechanically Robust and Depolymerizable Polyesters With Near‐Complete Monomer Recovery for Circular Additive Manufacturing

Advanced Materials, EarlyView.
A sustainable δ‐lactone‐based polymer platform enables multimodal additive manufacturing through DLP, DIW, and FFF, combining tunable crystallinity, photocurable networks, mechanical robustness, and functional response. The printed materials can be mechanically reprocessed and chemically depolymerized into recoverable monomers, demonstrating a closed ...
Farzad Gholami, Rampi Ramprasad, H. Jerry Qi   +2 more
wiley   +1 more source

Study on the Combustion Behavior and Kinetic Characteristics of Semi-Coke from Oil Shale

Applied Sciences
This study systematically investigates the combustion behavior and kinetic characteristics of oil shale semi-coke. Thermogravimetric analysis (TGA) experiments, combined with both model-free and model-based methods, were used to explore the thermal ...
Fajun Zhao, Lei Zhang, Sen Liu, Tianyu Wang, Peiyong Xue, Mingxuan Wu, Jiankang Yun   +6 more
doaj   +1 more source

Preparation and Characterization of Hydrophobic-Associated Microspheres for Deep Profile Control in Offshore Oilfields

International Journal of Polymer Science, 2018
Microspheres have excellent sealing performances such as injectivity, bridging-off, deep migration, and deformation performances, but their plugging effects are limited by the fast swelling rate and poor viscoelasticity.
Qin Yu, Xiangguo Lu, Yubao Jin, Cui Zhang, Kuo Liu, Xinbao Hu   +5 more
doaj   +1 more source