NDLI: Titania deposition on pmr-15

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Titania deposition on pmr-15

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sutter, James K. McIlwain, Alan Frimer, Aryeh A. Gershevitz, Olga Goffer, Yossi Milhet, Xavier Sampathkumaran, Uma Meador, Mary B. Pizem, Hillel Sukenik, Chaim N.
Copyright Year	2005
Description	The formation, degree of crystallinity and adherence of dense titania (TiO2) thin film coatings on a high-temperature polyimide resin (PMR-15) can be influenced by the chemical composition of the polymer surface. Furthermore, solution deposition conditions can be adjusted to provide additional control over the morphology and crystallinity of the titania films. Recipes for solution-based titania deposition that used a slowly-hydrolyzing titanium fluoride salt in the presence of boric acid as a fluoride scavenger allowed growth of films up to 750 nm thick in 22 h. By adjusting solution pH and temperature, either amorphous titania or oriented crystalline anatase films could be formed. Surface sulfonate groups enhance the adhesion of solution-deposited oxide thin film coatings. While most sulfonation procedures severely damaged the PMR-15 surface, the use of chlorosulfonic acid followed by hydrolysis of the installed chlorosulfonyl groups provided effective surface sulfonation without significant surface damage. In some cases, the oxide deposition solution caused partial hydrolysis of the polymer surface, which itself was sufficient to allow adhesion of the titania film through chelation of titanium ions by exposed benzoic acid groups on the polymer surface.
File Size	725534
Page Count	31
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20050082126
Archival Resource Key	ark:/13960/t2j72dm0h
Language	English
Publisher Date	2005-01-01
Access Restriction	Open
Subject Keyword	Solid-state Physics Thin Films Titanium Oxides Hydrolysis Sulfonates Adhesion Deposition Polyimide Resins Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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