Authors:
Mimpin Ginting
;
Dasron Bulolo
;
Herlince Sihotang
and
Indra Masmur
Affiliation:
Department of Chemistry, Universitas Sumatera Utara, Medan
Keyword(s):
Schiff Base, Ethylenediamine, Furfural, Corrosion Inhibitor, Zinc
Abstract:
Schiff Base from condensation of ethylenediamine as the source of primary amine with furfural from sugarcane bagasse as the source of carbonyl has been synthesized and tested for its corrosion inhibitors activity. The yield of furfural from 100 g of sugarcane bagasse is 12.6 g. Qualitative analysis shows the existence of furfural in brick red colour by using aniline : acetic acid (1:1 v/v) as solvent. FT-IR Spectroscopy shows vibration in wavenumber 1677 cm-1 as C=O and 1573 cm-1 as cyclic C=C. Condensation 9.6 g of furfural with 2.4 g of ethylenediamine in reflux condition for 5 hours using ethanol as solvent yields 8.64 g (70.55%) of Schiff Base. FT-IR Spectroscopy for Schiff Base analysis shows vibration of –C=N- in 1647 cm-1. The test of corrosion inhibitor activity is by weighting the decrease mass of zinc in HCl 0.1 N with concentration 7000 ppm for each compound. The efficiency value of corrosion inhibitor are 69.06% for furfural, 53.67% for ethylenediamine, and 82.20% for syn
thesized Schiff Base.
1 INTRODUCTION
Sugarcane bagasse is a solid part of cane from extracted cane stem. Sugarcane bagasse consists of C (carbon) 47%, H (hydrogen) 6.5%, O (oxygen) 44%, and ash 2.5%. Based on Pritzelitz formula (Hugot, 1986) every kilogram of sugarcane bagasse contains 2.5% sugar which produce 1825 kcal/kg. Composition of sugarcane bagasse are 3.82% ash, 22.09% lignin, 37.65% cellulose, 27.97% pentosan, 3.01% silica, and 3.3% reduction sugar. Basically, fiber of sugarcane bagasse consists of cellulose, pentosan, and lignin. Composition of each component is vary depend on the variety of cane (Mubin & Ratnanto, 2005) Sugarcane bagasse also contains polysaccharides which can be converted into many industry production. One of polysaccharides components in sugarcane bagasse is pentosan (20-27%).
With high concentration, pentosan from sugarcane bagasse
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