Malaysian Journal of Analytical Sciences Vol 23 No 3 (2019): 451 - 461

POTENTIAL OF CABBAGE EXTRACT (Brassica oleracea) AS ANTI-FOULING AGENT IN ALKYD UNDERCOAT FOR MILD STEEL IN SEAWATER

(Potensi Ekstrak Kubis (Brassica oleracea) Sebagai Ejen Anti-Kotoran bagi Cat Asas Alkid untuk Keluli Lembut di dalam Air Laut)

Mohammad Fakhratul Ridwan Zulkifli¹, Norasidayu Mohd Radzi¹, Suriani Mat Jusoh¹,Jasnizat Saidin², Wan Mohd Norsani Wan Nik¹*

¹School of Ocean Engineering

²Institute of Marine Biotechnology

Universiti Malaysia Terengganu, 21030 Kuala Nerus, Terengganu, Malaysia

*Corresponding author: niksani@umt.edu.my

Received: 1 January 2019; Accepted: 22 May 2019

Abstract

An investigation was conducted on cabbage extract (Brassica oleracea) to observe its function as green antifouling agent in alkyd undercoat for mild steel in seawater. Cabbage extract shows 43.6% of inhibition efficiency towards Pseudomonas aeruginosa bacteria at 15.525 g/mL cabbage concentration. FTIR analysis shows the complexation between alkyd paint and cabbage extract where the peak in OH, C-H and C=O have shifted indicating the chain scission of the alkyd resin polymer backbone with cabbage extract. Weight gained analysis reveals that coated mild steel incorporated with cabbage extract had reduced the fouling attachment. However, weight gained value increases as the immersion period increases for all coated samples. Morphological profile of coated mild steel shows an attachment of fouling where prominent attachment can be observed on coated mild steel without cabbage extract.

Keywords: anti-fouling, alkyd undercoat, Brassica oleracea, Pseudomonas aeruginosa, mild steel

Abstrak

Kajian telah dilaksanakan terhadap ekstrak kubis untuk melihat fungsinya sebagai ejen anti-kotoran hijau di dalam cat asas alkid untuk keluli lembut di dalam air laut. Ekstrak kubis menunjukkan sebanyak 43.6% kecekapan perencatan terhadap bakteria Pseudomona aeruginosa pada ekstrak kubis berkepekatan 15.525 g/mL. Analisis FTIR menunjukkan pengkompleksan antara pelitup cat asas alkid dan ekstrak kubis di mana puncak OH, C-H dan C=O telah berubah menandakan berlaku tindakbalas guntingan pada rantai utama polimer resin alkid yang mengandungi ekstrak kubis. Analisis pertambahan berat menunjukkan keluli lembut bersadur yang mengandungi ekstrak kubis telah mengurangkan kelekatan kotoran. Walaubagaimanapun, nilai pertambahan berat telah meningkat apabila tempoh rendaman meningkat untuk kesemua sampel bersadur. Profil morfologi keluli lembut bersadur menunjukkan perlekatan kotoran di mana perlekatan ini lebih jelas kelihatan pada keluli lembut bersadur tanpa gabungan ekstrak kubis.

Kata kunci: anti-kotoran, cat asas alkid, Brassica oleracea, Pseudomonas aeruginosa, keluli lembut

References

1. Finšgar, M. and Jackson, J. (2014). Application of corrosion inhibitors for steels in acidic media for the oil and gas industry: A review. Corrosion Science, 86: 17-41.

2. Qian, P. Y., Xu, Y. and Fusetani, N. (2009). Natural products as antifouling compounds: recent progress and future perspectives. Biofouling, 26(2): 223-234.

3. Abdullah, S. H. (2012). Antifouling potential of mangrove bark condensed tannins (Rhizophora apiculata) as antifouling for mild steel in seawater. Thesis of Bachelor Degree, Universiti Malaysia Terengganu.

4. Samsudin, A. S., Khairul, W. M., and Isa, M. I. N. (2012). Characterization on the potential of carboxy methylcellulose for application as proton conducting biopolymer electrolytes. Journal of Non-Crystalline Solids, 358: 1104-1112.

5. Yayan, J., Ghebremedhin, B. and Rasche, K. (2015). Antibiotic resistance of Pseudomonas aeruginosa in pneumonia at a single university hospital center in Germany over a 10-year period. PLOS one, 10(10): 1-20.

6. Hayek, S. A. and Ibrahim, S. A. (2013). Current limitations and challenges with lactic acid bacteria: A review. Food and Nutrition Sciences, 4(11): 73-87.

7. Tiwari, B. K., Valdramidis, V. P., O’Donnell, C. P., Muthukumarappan, K., Bourke, P. and Cullen, P. J. (2009). Application of natural antimicrobials for food preservation. Journal of Agricultural and Food Chemistry, 57(14): 5987-6000.

8. Bajpai, V. K., Rahman, A., Dung, N. T., Huh, M. K., and Kang, S. C. (2008). In vitro inhibition of food spoilage and foodborne pathogenic bacteria by essential oil and leaf extracts of Magnolia liliflora Desr. Journal of Food Science, 73(6): 314-320.

9. Balasundram, N., Sundram, K. and Samman, S. (2006). Phenolic compounds in plants and agri-industrial by-products: Antioxidant activity, occurrence, and potential uses. Food Chemistry, 99(1): 191-203.

10. Nurioglu, A. G., and Esteves, A. C. C. (2015). Non-toxic, non-biocide-release antifouling coatings based on molecular structure design for marine applications. Journal of Materials Chemistry B, 3(32): 6547- 6570.

11. Teodoro, G. R., Ellepola, K., Seneviratne, C. J. and Koga-Ito, C. Y. (2015). Potential use of phenolic acids as anti-Candida agents: a review. Frontiers in Microbiology, 6: 1420.

12. Cho, J. Y., Kwon, E. H., Choi, J. S., Hong, S. Y., Shin, H. W. and Hong, Y. K. (2001). Antifouling activity of seaweed extracts on the green alga Enteromorpha prolifera and the mussel Mytilus edulis. Journal of Applied Phycology, 13(2): 117-125.

13. Dariva, C. G. and Galio, A. F. (2014). Corrosion inhibitors–principles, mechanisms and applications. In developments in corrosion protection. InTech Open Publisher.