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A Superhydrophobic Coating : Fluorophilic Silica Nanoparticle-Doped Teflon Films

Wang, Sijia (2013) A Superhydrophobic Coating : Fluorophilic Silica Nanoparticle-Doped Teflon Films. Master's Thesis, University of Pittsburgh. (Unpublished)

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Coatings prepared from a suspension of fluoroalkyl-silane modified silica nanoparticles (FNPs) in a solution containing Teflon AF 2400 show wetting properties that depend on composition and the method of film formation. Static contact angle and sliding angle measurements revealed that adding FNPs improved their water repellency. Specifically, water droplets have static contact angles of 120-151° on FNP-containing films, compared with 114.6° on a FNP-free Teflon AF coated surface. Static contact angles increase with the weight percent of FNPs. Superhydrophobic (contact angle >150° and sliding angle <10°) states were achieved on films with 70% weight percentage of 510 nm FNPs. Surface morphologies were determined by scanning electron microscopy (SEM) and atomic force microscopy (AFM). Spin coating was later proved a better film fabrication method than solution-cast deposition, in terms of surface morphology and sliding angles.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Wang, Sijiasiw8@pitt.eduSIW8
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairWeber, Stephen Gsweber@pitt.eduSWEBER
Committee MemberLiu, Haitaohliu@pitt.eduHLIU
Committee MemberMillstone, Jilljem210@pitt.eduJEM210
Date: 18 October 2013
Date Type: Publication
Defense Date: 9 August 2013
Approval Date: 18 October 2013
Submission Date: 7 August 2013
Access Restriction: 1 year -- Restrict access to University of Pittsburgh for a period of 1 year.
Number of Pages: 36
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Chemistry
Degree: MS - Master of Science
Thesis Type: Master's Thesis
Refereed: Yes
Uncontrolled Keywords: fluorophilic nanoparticles, superhydrophobic Teflon films
Date Deposited: 18 Oct 2014 05:00
Last Modified: 13 Mar 2019 17:34

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