Graduate Thesis Or Dissertation

 

Stability and biological responses of zinc oxide metalworking nanofluids (ZnO MWnF™) Public Deposited

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https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/z316q493j

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  • Zinc oxide nanoparticles (ZnO NPs) have demonstrated the ability to improve lubrication and thermal conductivity, and stand as promising metalworking lubricant and coolant additives due to their low cost compared to other NPs. While nanomaterials are a focus of research due to their potential to enable advanced technologies, little is known about their effects on the environment and human health. This research investigates two main characteristics of ZnO metalworking nanofluids (MWnF™). First, the stability of ZnO NPs (20nm) is investigated in mixtures of a microemulsion (TRIM® MicroSol® 585XT) and dispersants, all of which are commercially available. Second, toxicological assessments are conducted to survey the effect of ZnO NPs on MWnF™ safety. The results revealed that none of the dispersants enhanced the stability of ZnO NPs more than the prepared microemulsion alone. Research also revealed that ZnO MWnF™ had a significantly higher toxicity than the prepared microemulsion. This demonstrates the need for precautionary development of metalworking nanofluids. 
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  • description.provenance : Approved for entry into archive by Laura Wilson(laura.wilson@oregonstate.edu) on 2014-05-29T23:18:33Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) Thesis_Faraz Niyaghi.pdf: 1452584 bytes, checksum: ceb1aa310987a5817d3ced71d485a62e (MD5)
  • description.provenance : Submitted by Faraz Niyaghi (niyaghif@onid.orst.edu) on 2014-05-27T18:55:04Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) Thesis_Faraz Niyaghi.pdf: 1452584 bytes, checksum: ceb1aa310987a5817d3ced71d485a62e (MD5)
  • description.provenance : Approved for entry into archive by Julie Kurtz(julie.kurtz@oregonstate.edu) on 2014-05-29T18:16:49Z (GMT) No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) Thesis_Faraz Niyaghi.pdf: 1452584 bytes, checksum: ceb1aa310987a5817d3ced71d485a62e (MD5)
  • description.provenance : Made available in DSpace on 2014-05-29T23:18:33Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: bb87e2fb4674c76d0d2e9ed07fbb9c86 (MD5) Thesis_Faraz Niyaghi.pdf: 1452584 bytes, checksum: ceb1aa310987a5817d3ced71d485a62e (MD5) Previous issue date: 2013-05-31

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