A Macro and Nanoconfined Tribological Study of Linear and Branched Molecules
Elucidating the lubricity of a liquid under nanoconfinement conditions and associating it with the resulting macroscopic properties are important in the design of high-performance lubricants. One of interesting elements of regulating lubrication is branched structures as potential lubricants because...
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| Veröffentlicht in: | Tribology letters 2023-06, Vol.71 (2), p.71, Article 71 |
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| creator | Iizuka, Masanori Mizukami, Masashi Kurihara, Kazue |
| description | Elucidating the lubricity of a liquid under nanoconfinement conditions and associating it with the resulting macroscopic properties are important in the design of high-performance lubricants. One of interesting elements of regulating lubrication is branched structures as potential lubricants because the most popular base lubricant, poly(α-olefin) (PAO), possesses a branched structure. However, lubricants with such specific structures have never been systematically investigated. Thus, using macro friction measurements and resonance shear measurements, we investigated the macro and nanoconfined lubricities of branched potential lubricants, isostearic acid and isostearic acid T, and compared their properties with those of a typical branched lubricant (PAO) and a linear model lubricant (hexadecane) to elucidate the differences resulting from their different structures. It was found that the viscosity parameter (
b
s
) at the smallest thickness, that called the hard wall thickness (normal load = 22.7 mN), of the confined liquid between surfaces increased in the order of isostearic acid |
| doi_str_mv | 10.1007/s11249-023-01733-4 |
| format | Article |
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b
s
) at the smallest thickness, that called the hard wall thickness (normal load = 22.7 mN), of the confined liquid between surfaces increased in the order of isostearic acid < PAO < isostearic acid T < hexadecane, and this parameter showed a similar trend to the friction coefficient in terms of the macroscopic friction under the boundary lubrication regime. These results indicate that the presence of a branched structure (possessing a lower
b
s
value than the linear hexadecane under nanoconfinement conditions) can determine the coefficient of macroscopic friction in the boundary lubrication regime, and is expected to promote the development of high-performance lubricants.
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b
s
) at the smallest thickness, that called the hard wall thickness (normal load = 22.7 mN), of the confined liquid between surfaces increased in the order of isostearic acid < PAO < isostearic acid T < hexadecane, and this parameter showed a similar trend to the friction coefficient in terms of the macroscopic friction under the boundary lubrication regime. These results indicate that the presence of a branched structure (possessing a lower
b
s
value than the linear hexadecane under nanoconfinement conditions) can determine the coefficient of macroscopic friction in the boundary lubrication regime, and is expected to promote the development of high-performance lubricants.
Graphical abstract</description><subject>Acids</subject><subject>Boundary lubrication</subject><subject>Chemistry and Materials Science</subject><subject>Coefficient of friction</subject><subject>Corrosion and Coatings</subject><subject>Friction</subject><subject>Hexadecane</subject><subject>Lubricants</subject><subject>Lubricants & lubrication</subject><subject>Lubrication</subject><subject>Lubricity</subject><subject>Materials Science</subject><subject>Nanotechnology</subject><subject>Original Paper</subject><subject>Parameters</subject><subject>Physical Chemistry</subject><subject>Surfaces and Interfaces</subject><subject>Theoretical and Applied Mechanics</subject><subject>Thin Films</subject><subject>Tribology</subject><subject>Wall thickness</subject><issn>1023-8883</issn><issn>1573-2711</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2023</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNp9kLtOAzEQRS0EEiHwA1SWqA1-7dqUIeIlbaAg1JbjHYeNFjvY2YK_x8ki0VHMQ5pzZzQXoUtGrxml6iYzxuUtoVwQypQQRB6hCauUIFwxdlz6_UhrLU7RWc4bSotMVxPUzPDCuhSxDS1-sSG6GHwXoMXL1K1iH9edsz1-2w3tN44eN2Vm04G-Sza4j0IuYg9u6CGfoxNv-wwXv3WK3h_ul_Mn0rw-Ps9nDXFc0R2RVCgOrJLcO2m58JWsQa-0g9IIxbizdp9rqKW3WtRAV9RzqEBLXYtWTNHVuHeb4tcAeWc2cUihnDRcMyZKcFYoPlLlvZwTeLNN3adN34ZRs3fNjK6ZYo05uGZkEYlRlAsc1pD-Vv-j-gFnyG3u</recordid><startdate>20230601</startdate><enddate>20230601</enddate><creator>Iizuka, Masanori</creator><creator>Mizukami, Masashi</creator><creator>Kurihara, Kazue</creator><general>Springer US</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope></search><sort><creationdate>20230601</creationdate><title>A Macro and Nanoconfined Tribological Study of Linear and Branched Molecules</title><author>Iizuka, Masanori ; Mizukami, Masashi ; Kurihara, Kazue</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c270t-40372e1542fc4a23f546e8b8ce5463712caa712c6e64fa836e0b0f2e5e84863d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2023</creationdate><topic>Acids</topic><topic>Boundary lubrication</topic><topic>Chemistry and Materials Science</topic><topic>Coefficient of friction</topic><topic>Corrosion and Coatings</topic><topic>Friction</topic><topic>Hexadecane</topic><topic>Lubricants</topic><topic>Lubricants & lubrication</topic><topic>Lubrication</topic><topic>Lubricity</topic><topic>Materials Science</topic><topic>Nanotechnology</topic><topic>Original Paper</topic><topic>Parameters</topic><topic>Physical Chemistry</topic><topic>Surfaces and Interfaces</topic><topic>Theoretical and Applied Mechanics</topic><topic>Thin Films</topic><topic>Tribology</topic><topic>Wall thickness</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Iizuka, Masanori</creatorcontrib><creatorcontrib>Mizukami, Masashi</creatorcontrib><creatorcontrib>Kurihara, Kazue</creatorcontrib><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central UK/Ireland</collection><collection>ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central Korea</collection><collection>SciTech Premium Collection</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><jtitle>Tribology letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Iizuka, Masanori</au><au>Mizukami, Masashi</au><au>Kurihara, Kazue</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A Macro and Nanoconfined Tribological Study of Linear and Branched Molecules</atitle><jtitle>Tribology letters</jtitle><stitle>Tribol Lett</stitle><date>2023-06-01</date><risdate>2023</risdate><volume>71</volume><issue>2</issue><spage>71</spage><pages>71-</pages><artnum>71</artnum><issn>1023-8883</issn><eissn>1573-2711</eissn><abstract>Elucidating the lubricity of a liquid under nanoconfinement conditions and associating it with the resulting macroscopic properties are important in the design of high-performance lubricants. One of interesting elements of regulating lubrication is branched structures as potential lubricants because the most popular base lubricant, poly(α-olefin) (PAO), possesses a branched structure. However, lubricants with such specific structures have never been systematically investigated. Thus, using macro friction measurements and resonance shear measurements, we investigated the macro and nanoconfined lubricities of branched potential lubricants, isostearic acid and isostearic acid T, and compared their properties with those of a typical branched lubricant (PAO) and a linear model lubricant (hexadecane) to elucidate the differences resulting from their different structures. It was found that the viscosity parameter (
b
s
) at the smallest thickness, that called the hard wall thickness (normal load = 22.7 mN), of the confined liquid between surfaces increased in the order of isostearic acid < PAO < isostearic acid T < hexadecane, and this parameter showed a similar trend to the friction coefficient in terms of the macroscopic friction under the boundary lubrication regime. These results indicate that the presence of a branched structure (possessing a lower
b
s
value than the linear hexadecane under nanoconfinement conditions) can determine the coefficient of macroscopic friction in the boundary lubrication regime, and is expected to promote the development of high-performance lubricants.
Graphical abstract</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s11249-023-01733-4</doi></addata></record> |
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| subjects | Acids Boundary lubrication Chemistry and Materials Science Coefficient of friction Corrosion and Coatings Friction Hexadecane Lubricants Lubricants & lubrication Lubrication Lubricity Materials Science Nanotechnology Original Paper Parameters Physical Chemistry Surfaces and Interfaces Theoretical and Applied Mechanics Thin Films Tribology Wall thickness |
| title | A Macro and Nanoconfined Tribological Study of Linear and Branched Molecules |
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