Increased Wettability and Surface Free Energy of Polyurethane by Ultraviolet Ozone Treatment Kuang, Ping Constant, Kristen Constant, Kristen
dc.contributor.department Materials Science and Engineering 2018-02-18T18:11:58.000 2020-06-30T06:07:28Z 2020-06-30T06:07:28Z Thu Jan 01 00:00:00 UTC 2015 2015-01-01
dc.description.abstract <p>The wettability of polyurethane (PU) was altered using ultraviolet ozone (UVO) treatment. The effect of UVO treatment on PU surface chemistry was investigated with various experiments. The direct measurement of sessile drops was employed to quantify the static contact angle of different wetting liquids on homogeneous PU films with various UV ozone treatment times. The contact angle of DI water droplets was decreased to 17.2º from 70.04º after 5min UVO treatment. The surface free energy of PU films was 51.46mN/m prior to treatment and was increased to 71.5mN/m after being fully treated. X-ray Photoelectron Spectroscopy (XP) analysis shows a signifi‐cant amount of polar functional species (C-O and C=O bonding) were formed on the PU surface by UVO treatment. Atomic Force Microscopy (AFM) characterization shows the PU surface morphology was different before and after UVO treatment. The effect of water washing on UVO treated surface was also investigated. An aging effect study indicates the UV ozone modification can sustain the improved wettability with limited hydrophobic recovery, where the DI water contact angle remains constant at around 22º after the UVO treatment.</p>
dc.description.comments <p>This is a chapter from Ping Kuang and Kristen Constant (2015). Increased Wettability and Surface Free Energy of Polyurethane by Ultraviolet Ozone Treatment, Wetting and Wettability, Dr. Mahmood Aliofkhazraei (Ed.), InTech, doi:<a href="" target="_blank">10.5772/60798</a>. Posted with permission.</p>
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dc.identifier archive/
dc.identifier.articleid 1223
dc.identifier.contextkey 10499881
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath mse_pubs/222
dc.language.iso en
dc.source.bitstream archive/|||Fri Jan 14 22:42:30 UTC 2022
dc.source.uri 10.5772/60798
dc.subject.disciplines Materials Science and Engineering
dc.subject.disciplines Mechanics of Materials
dc.subject.disciplines Polymer and Organic Materials
dc.subject.keywords UV ozone treatment
dc.subject.keywords Surface energy
dc.subject.keywords Contact angles
dc.subject.keywords Surface wettability
dc.title Increased Wettability and Surface Free Energy of Polyurethane by Ultraviolet Ozone Treatment
dc.type article
dc.type.genre book_chapter
dspace.entity.type Publication
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relation.isOrgUnitOfPublication bf9f7e3e-25bd-44d3-b49c-ed98372dee5e
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