Tribological analysis of Titanium Oxide (TiO₂) based BioLubricants at various operating conditions / (Record no. 614893)
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| 000 -LEADER | |
|---|---|
| fixed length control field | 02423nam a22001577a 4500 |
| 082 ## - DEWEY DECIMAL CLASSIFICATION NUMBER | |
| Classification number | 621 |
| 100 ## - MAIN ENTRY--PERSONAL NAME | |
| Personal name | Shah, Muhammad Usama Habib |
| 245 ## - TITLE STATEMENT | |
| Title | Tribological analysis of Titanium Oxide (TiO₂) based BioLubricants at various operating conditions / |
| Statement of responsibility, etc. | Muhammad Usama Habib Shah |
| 264 ## - PRODUCTION, PUBLICATION, DISTRIBUTION, MANUFACTURE, AND COPYRIGHT NOTICE | |
| Place of production, publication, distribution, manufacture | Islamabad : |
| Name of producer, publisher, distributor, manufacturer | SMME- NUST; |
| Date of production, publication, distribution, manufacture, or copyright notice | 2025. |
| 300 ## - PHYSICAL DESCRIPTION | |
| Extent | 80p. |
| Other physical details | Soft Copy |
| Dimensions | 30cm |
| 500 ## - GENERAL NOTE | |
| General note | Mechanical components operating under boundary lubrication experience high friction and wear<br/>which lead to energy losses and faster equipment damage. Traditionally, mineral oil–based<br/>lubricants have been used to overcome these issues but their declining availability and<br/>environmental impact have encouraged a shift toward renewable, eco-friendly bio-lubricants.<br/>While bio-lubricants are sustainable and biodegradable, their performance often declines at high<br/>temperatures and heavy loads due to lower thermal stability and inconsistent wear resistance.<br/>Using nanoparticles in bio-lubricants helps improve their performance by forming a protective<br/>film, lowering surface contact and maintaining stable friction behavior. Titanium dioxide (TiO₂)<br/>was chosen in this study for its chemical stability, low toxicity and ability to form protective<br/>tribofilms. Cottonseed Oil (CSO), Rattan Jot Oil (RJO), Waste Cooking Oil (WCO) and synthetic<br/>Polyalphaolefin (PAO) were tested with and without 1 wt% TiO₂ using a four-ball tribometer at<br/>75°C and 100°C under 147N and 392N loads. The coefficient of friction (COF), wear scar diameter<br/>(WSD) and surface roughness were measured. Worn surface analyses were conducted using an<br/>Olympus DSX-1000 microscope. RJO+TiO₂ showed the best performance, achieving a 65%<br/>reduction in COF and 37.5% reduction in WSD at 100°C–147 N. CSO+TiO₂ also performed<br/>strongly, with a 62% reduction in WSD, while WCO+TiO₂ gave the worst results, with 111%<br/>higher WSD and 36% higher COF under 100°C–392 N due to nanoparticle agglomeration and<br/>unstable lubrication films. These results show that TiO₂ nanoparticles can significantly enhance<br/>the friction and wear performance of bio-lubricants, with RJO+TiO₂ emerging as the most reliable<br/>choice for high-load boundary lubrication applications. |
| 650 ## - SUBJECT ADDED ENTRY--TOPICAL TERM | |
| Topical term or geographic name entry element | MS Mechanical Engineering |
| 700 ## - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Supervisor : Dr. Rehan Zahid |
| 856 ## - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="http://10.250.8.41:8080/xmlui/handle/123456789/55023">http://10.250.8.41:8080/xmlui/handle/123456789/55023</a> |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | |
| Koha item type | Thesis |
| Withdrawn status | Permanent Location | Current Location | Shelving location | Date acquired | Full call number | Barcode | Koha item type |
|---|---|---|---|---|---|---|---|
| School of Mechanical & Manufacturing Engineering (SMME) | School of Mechanical & Manufacturing Engineering (SMME) | E-Books | 09/26/2025 | 621 | SMME-TH-1173 | Thesis |