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Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process

Human joints support us to reduce the impact on our body and move them smoothly. As they are composed of gel-like structures, gel materials with soft and resilient properties are expected, as lubricants, to provide high efficiency and a long lifetime for mechanical parts. While double network gels i...

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Detalles Bibliográficos
Autores principales: Arafune, Hiroyuki, Watarai, Yuma, Kamijo, Toshio, Honma, Saika, Sato, Takaya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8950215/
https://www.ncbi.nlm.nih.gov/pubmed/35329565
http://dx.doi.org/10.3390/ma15062113
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author Arafune, Hiroyuki
Watarai, Yuma
Kamijo, Toshio
Honma, Saika
Sato, Takaya
author_facet Arafune, Hiroyuki
Watarai, Yuma
Kamijo, Toshio
Honma, Saika
Sato, Takaya
author_sort Arafune, Hiroyuki
collection PubMed
description Human joints support us to reduce the impact on our body and move them smoothly. As they are composed of gel-like structures, gel materials with soft and resilient properties are expected, as lubricants, to provide high efficiency and a long lifetime for mechanical parts. While double network gels including ionic liquids as swelling agents possess high mechanical strength and stable low friction under high temperature or vacuum, their fabrication process is complex and time-consuming. In this study, we applied one-pot synthesis to a double network ion gel (DNIG) to obtain a thin gel film by a simple coating method and examined its thermal, mechanical and tribological properties. The DNIG was obtained by one-pot synthesis (DNIG-1) combining polycondensation of tetraethoxysilane and radical polymerization of methyl methacrylate to form silica and poly(methyl methacrylate) as a 1st and 2nd network, respectively. Such obtained DNIG-1 was characterized and compared with DNIG obtained by a conventional two-step process (DNIG-2). Thermogravimetric analysis and the compressive stress–strain test showed high thermal stability and mechanical strength of DNIG-1. As friction at the glass/DNIG-1 interface showed high friction compared with that at glass/DNIG-2, various counterface materials were applied to examine their effect on the friction of DNIG-1. As SUS304/DNIG-1 showed much lower friction compared with glass/DNIG-1, the difference in the friction was presumably due to the different adsorption forces and compatibility between the materials.
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spelling pubmed-89502152022-03-26 Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process Arafune, Hiroyuki Watarai, Yuma Kamijo, Toshio Honma, Saika Sato, Takaya Materials (Basel) Article Human joints support us to reduce the impact on our body and move them smoothly. As they are composed of gel-like structures, gel materials with soft and resilient properties are expected, as lubricants, to provide high efficiency and a long lifetime for mechanical parts. While double network gels including ionic liquids as swelling agents possess high mechanical strength and stable low friction under high temperature or vacuum, their fabrication process is complex and time-consuming. In this study, we applied one-pot synthesis to a double network ion gel (DNIG) to obtain a thin gel film by a simple coating method and examined its thermal, mechanical and tribological properties. The DNIG was obtained by one-pot synthesis (DNIG-1) combining polycondensation of tetraethoxysilane and radical polymerization of methyl methacrylate to form silica and poly(methyl methacrylate) as a 1st and 2nd network, respectively. Such obtained DNIG-1 was characterized and compared with DNIG obtained by a conventional two-step process (DNIG-2). Thermogravimetric analysis and the compressive stress–strain test showed high thermal stability and mechanical strength of DNIG-1. As friction at the glass/DNIG-1 interface showed high friction compared with that at glass/DNIG-2, various counterface materials were applied to examine their effect on the friction of DNIG-1. As SUS304/DNIG-1 showed much lower friction compared with glass/DNIG-1, the difference in the friction was presumably due to the different adsorption forces and compatibility between the materials. MDPI 2022-03-13 /pmc/articles/PMC8950215/ /pubmed/35329565 http://dx.doi.org/10.3390/ma15062113 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Arafune, Hiroyuki
Watarai, Yuma
Kamijo, Toshio
Honma, Saika
Sato, Takaya
Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title_full Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title_fullStr Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title_full_unstemmed Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title_short Mechanical and Lubrication Properties of Double Network Ion Gels Obtained by a One-Step Process
title_sort mechanical and lubrication properties of double network ion gels obtained by a one-step process
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8950215/
https://www.ncbi.nlm.nih.gov/pubmed/35329565
http://dx.doi.org/10.3390/ma15062113
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