Date of Publication

2023

Document Type

Bachelor's Thesis

Degree Name

Bachelor of Science in Chemistry

Subject Categories

Chemistry

College

College of Science

Department/Unit

Chemistry

Thesis Advisor

David P. Peñaloza, Jr.

Defense Panel Member

Joel Garcia
Hilbert S. Magpantay

Abstract (English)

Due to the various adverse effects that corrosion imposes, it is imperative to explore studies that center on developments and modifications of organic coating systems as a preventive measure. On the other hand, due to commercialization, a novel practice to recycle accumulated waste polystyrene (PS) is necessary. PS has potential as an anti-corrosion polymer coating, but its barrier and mechanical characteristics can still be further optimized by the incorporation of nanofillers. In this work, an environment-friendly and corrosion-resistant PS-based coating was synthesized through solution-casting in D-limonene with Cloisite-20 A (C20A) and CeO2. Formulations of C20A and CeO2 of varying concentrations and compositions were prepared and applied on metal coupons. The cured coatings were characterized by contact angle measurements; immersion test; cross-hatch adhesion test, and thermogravimetric analysis (TGA). Experimental runs were compared against a commercial epoxy primer as a control. Results showed that the coating treatments were successfully synthesized via solution-casting and the optimal concentration of PS in limonene is 9-wt%. Characterization of the coating revealed that the 5% C20A stood out with excellent anti-corrosion and adhesion properties and thermal stability among the coating treatments despite reduced hydrophobicity compared to the pure PS coating. With a CR and η% of 0.023263 mm y-1and 65.88%, respectively, 5% C20A performed significantly better among other treatments as well as against the commercial epoxy primer used as a positive control. The blending of 5% C20A resulted in the PS coating property enhancement which could be explained by the successful dispersion of the C20A particles.

Abstract Format

html

Language

English

Format

Electronic

Keywords

Nanocomposites (Materials); Polystyrene

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Embargo Period

7-17-2024

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