ISOLATION OF CATECHINS FROM WHITE TEA AND ANTIBACTERIAL PROPERTIES TEST AGAINST STAPHYLOCOCCUS EPIDERMIDIS
Polyaniline (PAni) is one of conductive polymers which is being subject to research because its attractive <br /> <br /> <br /> properties and can be applied for modern technology. PAni is one of the easiest synthesized polymers, <br /> <br /> <br /> either by...
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Format: | Final Project |
Language: | Indonesia |
Online Access: | https://digilib.itb.ac.id/gdl/view/27463 |
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Institution: | Institut Teknologi Bandung |
Language: | Indonesia |
Summary: | Polyaniline (PAni) is one of conductive polymers which is being subject to research because its attractive <br />
<br />
<br />
properties and can be applied for modern technology. PAni is one of the easiest synthesized polymers, <br />
<br />
<br />
either by chemical reaction or electrochemical. In this study, the polyaniline was synthesized using pulse <br />
<br />
<br />
electropolymerization method by varying the percent duty, HCl concentration, and aniline concentration. <br />
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Variation of percent duty used was 50; 60; 65; 75; 80; 83,3; and 85,7%. Variation of HCl concentration <br />
<br />
<br />
used was 1; 1,5; 2; 2,5; and 3 M. Variation of aniline concentration used was 0,25; 0,5; 0,75; 1; and 1,25 <br />
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<br />
M. PAni was characterized using FTIR ATR spectroscopy, Raman spectroscopy, SEM, and measured its <br />
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<br />
cell performance by dye-sensitized solar cell (DSSC). The results of FTIR ATR spectroscopy show that <br />
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PAni has distinctive peaks of emeraldine, namely vibration of quinonoid ring and benzenoid ring, <br />
<br />
<br />
vibration C-N, vibration bend C-H. In addition, there is a peak showing the formation of phenazine in <br />
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<br />
PANi polymer chains. In the Raman spectroscopy from variation of percent duty, more intense peak <br />
<br />
<br />
appear at 1520 cm-1 (duty 60% and 65%), 1481 cm-1 (duty 75%) and 1483 cm-1 (duty 80-85,7 %) showing <br />
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<br />
the peak of vibration C=N quinonoid. In variation of HCl concentration, Raman shifts at 1191 cm-1 and <br />
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<br />
1623 cm-1, indicating bending vibration of C-H benzenoid and vibration of C-C benzenoid, were <br />
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<br />
increased after HCl concentration was increased to 1,5 M. In variation of aniline concentration, Raman <br />
<br />
<br />
shift at 1568 cm-1, which shows the vibration of C=C quinonoid, very intense at aniline concentration <br />
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<br />
1,25 M. In the SEM, the PAni was synthesized using pulse electropolymerization method have fibershaped <br />
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morphology with a rough surface. From the FESEM, the surface of PAni's morphology is covered <br />
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by bulge like a thorn with size 6-11 nm. The diameter of polyaniline ranges from 100-550 nm. In <br />
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characterization of DSSC using solar simulator highest efficiency is 0,76% when percent duty is 50%, <br />
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concentration of HCl is 2 M, and concentration of aniline is 0,75 M. |
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