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Jurnal Kimia Unand
Published by Universitas Andalas
ISSN : 23033401     EISSN : 30262933     DOI : -
Jurnal Kimia Unand has been registered with the number online ISSN: 3026-2933 and printed ISSN: 2303-3401. Jurnal Kimia Unand is a peer-reviewed journal published by the Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Andalas, Sumatera Barat, Indonesia. This journal is devoted to publishing original contributions on chemistry, applied chemistry, chemical engineering, and materials science, both theoretical and experimental studies. Among the research areas of interest are inorganic and organic, especially in developing materials with novel and/or valuable properties. Initially, J. Kim. Unand published articles in 2012, Volume 1. Number 1. November 2012 with a printed ISSN;2303-3401. This journal publishes 4 issues in 1 year and does not yet have an online journal system in the publishing process. This journal aims to publish the articles of undergraduate students of the Chemistry Department, Faculty of Mathematics and Natural Sciences, Andalas University, as one of the graduation requirements. In 2022, J. Kim. Unand initiated using OJS with an online ISSN, and the publishing frequency is two issues per year, in May and October. The criteria of the submitted article cover the following types of articles as follows: Communications. Research articles. Review articles. The scope of this journal includes: Organic synthesis and natural product chemistry Materials synthesis and characterization Synthesis of organic and inorganic compounds Theoretical and computational chemistry Fabrication, development, and validation of analytical methods Food and medicinal chemistry
Articles 41 Documents
Synthesis of Hydrophobic Coatings on Concrete Surface Using Organosilicone/TiO2 and Organosilicone/Carbon-Based Materials Wellia, Diana Vanda; Yanni, Rahma; Hidayat, Benny
Jurnal Kimia Unand Vol. 14 No. 2 (2025): November 2025
Publisher : Departemen Kimia Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jku.14.2.8-14.2025

Abstract

Surface coating methods provide protection for porous concrete surfaces against water diffusion, which can otherwise lead to structural damage and a reduction in concrete's service life. This study aims to assess the impact of varying quantities of biosynthesized TiO2 and coconut shell-derived carbon on concrete surface hydrophobicity and to compare their effectiveness in enhancing it. SEM analysis confirmed that the Organosilicone-based hydrophobic coating with 0,20 g of TiO2 and 0,20 g of carbon was uniformly distributed, covering micropores, and increasing concrete surface roughness. EDS analysis indicated a decrease in the Ca element peak and the absence of elements like Al, Fe, and K, validating the success of the concrete surface coating. FTIR analysis revealed the emergence of new absorption bands, such as 2963 cm-1 (aliphatic C-H bonds of Organosiliconee) and 477 cm-1 (Ti-O bonds), on the hydrophobic concrete surface. Contact angle measurements demonstrated hydrophobic behavior, with the B/Organosiliconee/TiO2 sample exhibiting an angle of up to 122,4º and the B/Organosiliconee/C sample up to 138,3º. Consequently, carbon derived from coconut shell waste emerges as a viable alternative for hydrophobic surface applications due to its superior hydrophobicity properties compared to TiO2.