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Macromol Rapid Commun
December 2024
State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China.
Water-based lubricants have the advantages of low cost, easy cleaning, and environmental friendliness, and are suitable for various lubrication applications. However, the limited tribological properties of pure water-based lubricants restrict their use. To improve these properties, water-based lubrication additives can be employed.
View Article and Find Full Text PDFAssessment of the vaginal microbiota before and after use of hyperosmolal lubricant during transvaginal ultrasound.
Am J Obstet Gynecol
December 2024
Department of Epidemiology and Public Health, University of Maryland School of Medicine, Baltimore, MD, USA; Institute for Genome Sciences, University of Maryland School of Medicine, Baltimore, MD, USA. Electronic address:
Background: Vaginal lubricants are commonly used during sexual activity and clinical procedures such as transvaginal ultrasound (TVUS). Epidemiologic and laboratory studies indicate hyperosmolal water-based lubricants may disrupt the vaginal microbiota, particularly the beneficial Lactobacillus spp. These bacteria play a critical role in protecting against sexually transmitted infection acquisition and other adverse gynecologic and obstetric outcomes.
View Article and Find Full Text PDFIonic liquid functionalized binary montmorillonite nanomaterials as water-based lubricant additives for steel/steel contact.
Nanoscale
November 2024
Shandong Laboratory of Advanced Materials and Green Manufacturing at Yantai, Yantai, 264006, China.
Two-dimensional (2D) nanomaterials have attracted much attention for the lubrication enhancement of water. Stably dispersing nanosheets in water for an extended period is a challenging task. 2D montmorillonite (MMT) nanosheets are modified with protonic ionic liquids (PILs) with the assistance of simple and efficient mechanochemical synthesis, which can stably disperse in water.
View Article and Find Full Text PDFTheoretical study of the synergistic effect between glyceryl monooleate lubricant and carboxymethylcellulose in reducing the coefficient of friction of water-based drilling fluids.
J Mol Model
November 2024
Instituto de Química, Universidade Federal Do Rio de Janeiro, Centro de Tecnologia, Bloco A, Rio de Janeiro, RJ, 21941-909, Brazil.
Context: Drilling fluids must reduce the coefficient of friction between the drilling equipment and the drilled rock or well casing. Friction forces become particularly relevant in drilling with a high angle gain, in which cases oil-based fluids are generally used. The latter are highly lubricating, but harmful to the environment.
View Article and Find Full Text PDFEnhancing Water Lubrication in UHMWPE Using Mesoporous Polydopamine Nanoparticles: A Strategy to Mitigate Frictional Vibration.
ACS Appl Mater Interfaces
November 2024
School of Transportation and Logistics Engineering, Wuhan University of Technology, Wuhan 430063, China.
Establishing a persistent lubrication mechanism and a durable tribo-film on contact surfaces is identified as crucial for improving the tribology and vibration characteristics of polymer materials under water-lubricated conditions. This study focuses on enhancing tribological performance and reducing frictional vibrations in ultrahigh molecular weight polyethylene (UHMWPE) through the incorporation of mesoporous polydopamine (MPDA) nanoparticles. In the experiments, MPDA nanoparticles were synthesized and blended with UHMWPE to create UHMWPE/MPDA composites.
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