Results 71 to 80 of about 136,396 (361)

Predictive modelling of the impact of silica nanoparticles on fluid loss of water based drilling mud [PDF]

, 2018
Research into the use of nanoparticles for drilling mud formulation is gaining momentum but a key challenge involves predicting the effect of nanoparticles on the properties of the modified mud.
Afolabi, Richard Oyekunle, Orodu, O. D., Seteyeobot, Ifeanyi   +2 more
core   +1 more source

Supraparticles Composed of Graphitic Carbon Nitride Nanoparticles and Silica‐Supported Horseradish Peroxidase as Customizable Hybrid Catalysts for Photo‐Biocatalytic Cascade Reactions in Continuous Flow

Advanced Functional Materials, EarlyView.
Herein presented supraparticles combine the nanoparticulate photocatalyst graphitic carbon nitride with the enzyme horseradish peroxidase, which is immobilized on silica nanoparticles. In an optimized compatibility range, both catalysts operate effectively within the hybrid supraparticles and catalyze a cascade reaction consisting of the photocatalytic
Bettina Herbig, Egzon Cermjani, Doris Hanselmann, Johannes Prieschl, Angelika Schmitt, Michael S. Moritz, Christian Papp, Greta Nölke, Stefano Di Fiore, Christoph Deckers, Thomas H. Rehm, Susanne Wintzheimer   +11 more
wiley   +1 more source

The Preparation and Properties of a Gel Plugging Agent Made from Copolymerization of Modified Carbon Nanotube

Zuanjingye yu wanjingye
Gel plugging agents usually have the characteristic of good adaptiveness, but the existing drilling fluid gel plugging agents generally suffer from poor stability at elevated temperatures and poor strength.
Xiangyuan SONG, Qiang LAN, Shichao YANG
doaj   +1 more source

Functional Materials for Environmental Energy Harvesting in Smart Agriculture via Triboelectric Nanogenerators

Advanced Functional Materials, EarlyView.
This review explores functional and responsive materials for triboelectric nanogenerators (TENGs) in sustainable smart agriculture. It examines how particulate contamination and dirt affect charge transfer and efficiency. Environmental challenges and strategies to enhance durability and responsiveness are outlined, including active functional layers ...
Rafael R. A. Silva, Giulio Fatti, Emanuel Carlos, Guilherme Ferreira, Sumita Goswami, Suman Nandy, Luiz H. C. Mattoso, Elvira Fortunato, Caio G. Otoni, Rodrigo Martins   +9 more
wiley   +1 more source

Study on Compatibility of an Anti-Contamination Agent with Cement Slurries and Drilling Fluids

Zuanjingye yu wanjingye
In deep well drilling and completion in Chuanyu area, drilling fluids mixed with cement slurries generally became highly viscous because of the poor compatibility between the drilling fluids and the cement slurries. An anti-contamination agent DRP-2S has
Hailong LI, Jinghong ZHOU, Zheng ZHANG, Lei LEI, Shunping ZHANG, Hua ZHANG, Yongjin YU   +6 more
doaj   +1 more source

Covalent Organic Frameworks for Water Sorption: The Importance of Framework Physical Stability

Advanced Functional Materials, EarlyView.
This study explores the water‐vapor stability of 2D covalent organic frameworks (COFs) with varying pore sizes. Results reveal microporous COFs demonstrate superior stability compared to mesoporous ones, despite lower water uptake. Mesoporous keto‐enamine‐linked COFs show enhanced stability due to intralayer hydrogen bonds, confirmed by simulations and
Wei Zhao, He Li, Bui Duc Thuan, Weidong Chen, Qiang Zhu, Mounib Bahri, Boyu Li, Kexin Yu, Chengjun Kang, Ting Chen, Zekun Wang, Nigel D. Browning, Kian Jon Chua, Dan Zhao   +13 more
wiley   +1 more source

A Comb Polymer for Dispersing Micro-Manganese Weighting Material

Zuanjingye yu wanjingye
To ensure the dispersion of micro-manganese weighting material in a completion fluid, comb polymer dispersants PSH of different compositions were developed using sodium methacrylate and methyl allyl polyoxyethylene ether through free radical ...
Huaike LI, Zhiyong WANG, Yufei ZHANG, Binbin HAO, Zhengfu WANG, Wenhao WANG, Yebang TAN   +6 more
doaj   +1 more source

Результати впровадження розроблених протизношувальних домішок до бурових розчинів різних типів при бурінні свердловин [PDF]

, 2007
Разработана методика добавления предварительно разработанных противоизносных добавок к буровым растворам. Проведенные исследования подтвердили справедливость и эффективность полученных регрессивных уравнений оптимизации содержания соответствующих ...
Дрогомирецький, Я. М., Овецький, С. О.   +1 more
core  

Two‐Dimensional Materials as a Multiproperty Sensing Platform

Advanced Functional Materials, EarlyView.
Various sensing modalities enabled and/or enhanced by two‐dimensional (2D) materials are reviewed. The domains considered for sensing include: 1) optoelectronics, 2) quantum defects, 3) scanning probe microscopy, 4) nanomechanics, and 5) bio‐ and chemosensing.
Dipankar Jana, Shubhrasish Mukherjee, Dmitrii Litvinov, Magdalena Grzeszczyk, Sergey Grebenchuk, Makars Šiškins, Virgil Gavriliuc, Yihang Ouyang, Changyi Chen, Yuxuan Ye, Meng Yiming, Maciej Koperski   +11 more
wiley   +1 more source

Optimization of potassium Iignosulfonate drilling fluid lubricating additive [PDF]

, 2015
Оптимізовано змащувальні домішки до лігносульфонатно-калієвої бурової промивальної рідини для буріння свердловин. Із урахуванням результатів лабораторних досліджень підібрано оптимальні і робочі концентрації змащувальних домішок, розроблено рецептуру ...
Верста, О. М., Гурський, С. А., Зіньков, Р. В., Магун, М. Я.   +3 more
core