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Píška M, Sliwková P, Vnuková Z, Petrenec M, Sedláková-Valášková E. Exquisite Energy Savings at Cold Metal Forming of Threads through the Application of Polymers. Polymers (Basel) 2022; 14:polym14061084. [PMID: 35335414 PMCID: PMC8950108 DOI: 10.3390/polym14061084] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 03/04/2022] [Accepted: 03/05/2022] [Indexed: 12/04/2022] Open
Abstract
One of the global problems today is energy—its production and distribution. As the human population grows, the consumption of energy rises simultaneously. However, the natural sources are limited, and so the focus on power savings becomes more and more important. One of the ways to reduce consumption is the use of effective lubricants and tribological fluids in industry, especially in processes with high demands on energy but high quality of products as well. Forming is a typical example of such technology, and the application of polymers seems to be a very important challenge, because the application of straight oils or lubricant with extreme pressure additives seems to be prevailing in that field. Nevertheless, the polymer lubricant should fulfill all European standards as well as the environmental and ecological limitations with respect to health and the natural environment and its recycling and disposal. This paper is focused on the forming technology of threads and the application of selected polymers to the forming process. The measured and quantified criteria are torque and force loadings, energy consumption, and quality of the produced surfaces. Kistler dynamometers, scanning electron microscopy, and advanced surface topography with the use of Alicona IF-G5 were applied to assess all aspects of the tribological and energy aspects of six modern process fluids, three lubricating pastes, and two fluid modifications. The results show that the polymer synthetic lubricant (at volume concentration 20% in water) can reduce the total energy consumption by up to 40% per forming cycle (in mean values) at average surface roughness below 0.8 μm.
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Laloy J, Haguet H, Alpan L, Raichman D, Dogné JM, Lellouche JP. Impact of functional inorganic nanotubes f-INTs-WS 2 on hemolysis, platelet function and coagulation. NANO CONVERGENCE 2018; 5:31. [PMID: 30467733 PMCID: PMC6206311 DOI: 10.1186/s40580-018-0162-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 10/07/2018] [Indexed: 06/09/2023]
Abstract
Inorganic transition metal dichalcogenide nanostructures are interesting for several biomedical applications such as coating for medical devices (e.g. endodontic files, catheter stents) and reinforcement of scaffolds for tissue engineering. However, their impact on human blood is unknown. A unique nanomaterial surface-engineering chemical methodology was used to fabricate functional polyacidic polyCOOH inorganic nanotubes of tungsten disulfide towards covalent binding of any desired molecule/organic species via chemical activation/reactivity of this former polyCOOH shell. The impact of these nanotubes on hemolysis, platelet aggregation and blood coagulation has been assessed using spectrophotometric measurement, light transmission aggregometry and thrombin generation assays. The functionalized nanotubes do not induce hemolysis but decrease platelet aggregation and induce coagulation through intrinsic pathway activation. The functional nanotubes were found to be more thrombogenic than the non-functional ones, suggesting lower hemocompatibility and increased thrombotic risk with functionalized tungsten disulfide nanotubes. These functionalized nanotubes should be used with caution in blood-contacting devices.
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Affiliation(s)
- Julie Laloy
- Namur Nanosafety Centre, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
- Department of Pharmacy, NARILIS, University of Namur, Namur, Belgium
| | - Hélène Haguet
- Department of Pharmacy, NARILIS, University of Namur, Namur, Belgium
- Department of Haematology Laboratory, Université catholique de Louvain, CHU UCL Namur, NARILIS, Yvoir, Belgium
| | - Lutfiye Alpan
- Namur Nanosafety Centre, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
- Department of Pharmacy, NARILIS, University of Namur, Namur, Belgium
| | - Daniel Raichman
- Department of Chemistry & Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Max & Anna Web Street, 5290002 Ramat-Gan, Israel
| | - Jean-Michel Dogné
- Namur Nanosafety Centre, University of Namur, Rue de Bruxelles 61, 5000 Namur, Belgium
- Department of Pharmacy, NARILIS, University of Namur, Namur, Belgium
| | - Jean-Paul Lellouche
- Department of Chemistry & Institute of Nanotechnology & Advanced Materials (BINA), Bar-Ilan University, Max & Anna Web Street, 5290002 Ramat-Gan, Israel
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Liu Z, Zhang L, Wang R, Poyraz S, Cook J, Bozack MJ, Das S, Zhang X, Hu L. Ultrafast Microwave Nano-manufacturing of Fullerene-Like Metal Chalcogenides. Sci Rep 2016; 6:22503. [PMID: 26931353 PMCID: PMC4773880 DOI: 10.1038/srep22503] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Accepted: 02/16/2016] [Indexed: 01/24/2023] Open
Abstract
Metal Chalcogenides (MCs) have emerged as an extremely important class of nanomaterials with applications ranging from lubrication to energy storage devices. Here we report our discovery of a universal, ultrafast (60 seconds), energy-efficient, and facile technique of synthesizing MC nanoparticles and nanostructures, using microwave-assisted heating. A suitable combination of chemicals was selected for reactions on Polypyrrole nanofibers (PPy-NF) in presence of microwave irradiation. The PPy-NF serves as the conducting medium to absorb microwave energy to heat the chemicals that provide the metal and the chalcogenide constituents separately. The MCs are formed as nanoparticles that eventually undergo a size-dependent, multi-stage aggregation process to yield different kinds of MC nanostructures. Most importantly, this is a single-step metal chalcogenide formation process that is much faster and much more energy-efficient than all the other existing methods and can be universally employed to produce different kinds of MCs (e.g., MoS2, and WS2).
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Affiliation(s)
- Zhen Liu
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA.,Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA
| | - Lin Zhang
- Materials Research and Education Center, Auburn University, Auburn, AL 36849, USA
| | - Ruigang Wang
- Department of Chemistry, Youngstown State University, Youngstown, OH 44555, USA
| | - Selcuk Poyraz
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Jonathan Cook
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Michael J Bozack
- Surface Science Laboratory, Department of Physics, Auburn University, Auburn, AL 36849, USA
| | - Siddhartha Das
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742-4111, USA
| | - Xinyu Zhang
- Department of Chemical Engineering, Auburn University, Auburn, AL 36849, USA
| | - Liangbing Hu
- Department of Materials Science and Engineering, University of Maryland, College Park, MD 20742-4111, USA
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O'Neal KR, Cherian JG, Zak A, Tenne R, Liu Z, Musfeldt JL. High Pressure Vibrational Properties of WS2 Nanotubes. NANO LETTERS 2016; 16:993-999. [PMID: 26675342 DOI: 10.1021/acs.nanolett.5b03996] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We bring together synchrotron-based infrared and Raman spectroscopies, diamond anvil cell techniques, and an analysis of frequency shifts and lattice dynamics to unveil the vibrational properties of multiwall WS2 nanotubes under compression. While most of the vibrational modes display similar hardening trends, the Raman-active A1g breathing mode is almost twice as responsive, suggesting that the nanotube breakdown pathway under strain proceeds through this displacement. At the same time, the previously unexplored high pressure infrared response provides unexpected insight into the electronic properties of the multiwall WS2 tubes. The development of the localized absorption is fit to a percolation model, indicating that the nanotubes display a modest macroscopic conductivity due to hopping from tube to tube.
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Affiliation(s)
- K R O'Neal
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - J G Cherian
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
| | - A Zak
- Faculty of Sciences, Holon Institute of Technology , Holon 58102, Israel
| | - R Tenne
- Department of Materials and Interfaces, Weizmann Institute , Rehovot 76100, Israel
| | - Z Liu
- Geophysical Laboratory, Carnegie Institution of Washington , Washington D.C. 20015, United States
| | - J L Musfeldt
- Department of Chemistry, University of Tennessee , Knoxville, Tennessee 37996, United States
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Ben Ishay R, Harel Y, Lavi R, Lellouche JP. Multiple functionalization of tungsten disulfide inorganic nanotubes by covalently grafted conductive polythiophenes. RSC Adv 2016. [DOI: 10.1039/c6ra19628d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Covalently grafted nanometric polythiophene adlayers have been generated towards morphologically well-defined core–shell WS2 INTs/polymer composites achieving high charge conductivity.
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Affiliation(s)
- Rivka Ben Ishay
- Department of Chemistry
- Nanomaterials Research Center
- Institute of Nanotechnology & Advanced Materials
- Bar-Ilan University
- Ramat-Gan 5290002
| | - Yifat Harel
- Department of Chemistry
- Nanomaterials Research Center
- Institute of Nanotechnology & Advanced Materials
- Bar-Ilan University
- Ramat-Gan 5290002
| | - Ronit Lavi
- Department of Chemistry
- Nanomaterials Research Center
- Institute of Nanotechnology & Advanced Materials
- Bar-Ilan University
- Ramat-Gan 5290002
| | - Jean-Paul Lellouche
- Department of Chemistry
- Nanomaterials Research Center
- Institute of Nanotechnology & Advanced Materials
- Bar-Ilan University
- Ramat-Gan 5290002
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