Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes
We combined zeolitic imidazolate framework nanoparticles (ZIF-8: ˜150 nm diameter) with Matrimid® 5218 polymer to form permeable mixed matrix membranes, featuring different weight fractions of nanoparticles (up to 30 wt. % loading). We used ball-on-disc micro-tribological method to measure the frict...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2014-12-01
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| Series: | APL Materials |
| Online Access: | http://dx.doi.org/10.1063/1.4897280 |
| _version_ | 1818394772670251008 |
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| author | Nay Win Khun E. M. Mahdi Siqi Ying Tan Sui Alexander M. Korsunsky Jin-Chong Tan |
| author_facet | Nay Win Khun E. M. Mahdi Siqi Ying Tan Sui Alexander M. Korsunsky Jin-Chong Tan |
| author_sort | Nay Win Khun |
| collection | DOAJ |
| description | We combined zeolitic imidazolate framework nanoparticles (ZIF-8: ˜150 nm diameter) with Matrimid® 5218 polymer to form permeable mixed matrix membranes, featuring different weight fractions of nanoparticles (up to 30 wt. % loading). We used ball-on-disc micro-tribological method to measure the frictional coefficient of the nanocomposite membranes, as a function of nanoparticle loading and annealing heat treatment. The tribological results reveal that the friction and wear of the unannealed samples rise steadily with greater nanoparticle loading because ZIF-8 is relatively harder than the matrix, thus promoting abrasive wear mechanism. After annealing, however, we discover that the nanocomposites display an appreciably lower friction and wear damage compared with the unannealed counterparts. Evidence shows that the major improvement in tribological performance is associated with the greater amounts of wear debris derived from the annealed nanocomposite membranes. We propose that detached Matrimid-encapsulated ZIF-8 nanoparticles could function as “spacers,” which are capable of not only reducing direct contact between two rubbing surfaces but also enhancing free-rolling under the action of lateral forces. |
| first_indexed | 2024-12-14T06:06:31Z |
| format | Article |
| id | doaj.art-18edab46c4c543f7ba2222d0dc534eeb |
| institution | Directory Open Access Journal |
| issn | 2166-532X |
| language | English |
| last_indexed | 2024-12-14T06:06:31Z |
| publishDate | 2014-12-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | APL Materials |
| spelling | doaj.art-18edab46c4c543f7ba2222d0dc534eeb2022-12-21T23:14:16ZengAIP Publishing LLCAPL Materials2166-532X2014-12-01212124101124101-710.1063/1.4897280001494APMFine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranesNay Win Khun0E. M. Mahdi1Siqi Ying2Tan Sui3Alexander M. Korsunsky4Jin-Chong Tan5School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, SingaporeDepartment of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United KingdomDepartment of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United KingdomDepartment of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United KingdomDepartment of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United KingdomDepartment of Engineering Science, University of Oxford, Parks Road, Oxford OX1 3PJ, United KingdomWe combined zeolitic imidazolate framework nanoparticles (ZIF-8: ˜150 nm diameter) with Matrimid® 5218 polymer to form permeable mixed matrix membranes, featuring different weight fractions of nanoparticles (up to 30 wt. % loading). We used ball-on-disc micro-tribological method to measure the frictional coefficient of the nanocomposite membranes, as a function of nanoparticle loading and annealing heat treatment. The tribological results reveal that the friction and wear of the unannealed samples rise steadily with greater nanoparticle loading because ZIF-8 is relatively harder than the matrix, thus promoting abrasive wear mechanism. After annealing, however, we discover that the nanocomposites display an appreciably lower friction and wear damage compared with the unannealed counterparts. Evidence shows that the major improvement in tribological performance is associated with the greater amounts of wear debris derived from the annealed nanocomposite membranes. We propose that detached Matrimid-encapsulated ZIF-8 nanoparticles could function as “spacers,” which are capable of not only reducing direct contact between two rubbing surfaces but also enhancing free-rolling under the action of lateral forces.http://dx.doi.org/10.1063/1.4897280 |
| spellingShingle | Nay Win Khun E. M. Mahdi Siqi Ying Tan Sui Alexander M. Korsunsky Jin-Chong Tan Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes APL Materials |
| title | Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes |
| title_full | Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes |
| title_fullStr | Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes |
| title_full_unstemmed | Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes |
| title_short | Fine-scale tribological performance of zeolitic imidazolate framework (ZIF-8) based polymer nanocomposite membranes |
| title_sort | fine scale tribological performance of zeolitic imidazolate framework zif 8 based polymer nanocomposite membranes |
| url | http://dx.doi.org/10.1063/1.4897280 |
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