Advisor

Kim, Yun Sang

Committee Member

Hassan, El Barbary M.

Committee Member

Lim, Hyungsuk (Thomas)

Committee Member

Nicholas, Darrel D.

Date of Degree

8-1-2020

Document Type

Graduate Thesis - Open Access

Major

Wood Science

Degree Name

Master of Science

College

College of Forest Resources

Department

Department of Sustainable Bioproducts

Abstract

This research investigates the efficacy of liquid-precursor thermal spray coating (TSC) as a facile wood modification technique to bring hydrophobicity and UV durability to a wooden surface. The technique was successful in depositing Cu and TiO2 particles onto southern yellow pine (SYP) veneers by using copper azole, copper quaternary, and titanium tetraisopropoxide as the precursor solutions. Using optimized settings, the average coating surface coverage of > 90% and an average coating thickness of > 5 μm were obtained. The coatings displayed up to 4H rating in the film hardness scale and up to 3B rating in adhesion strength scale, suggesting reasonable mechanical durability under mild mechanical abrasion. TSC-modified wood with TiO2 created a water repellent layer, yielding a significant increase in hydrophobicity that changed the water contact angle from 57° to 126°. Accelerated weathering test results showed that the TSC-modified wood was more resistant to discoloration compared to unmodified wood.

URI

https://hdl.handle.net/11668/18448

Comments

wood modification||thermal spray coating,||liquid precursor||particle deposition||surface modification of wood

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