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All Journal BULETIN FISIKA
Wolfharditia Oktaviana Nita
Udayana University
Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Materials Science & Nanotechnology Physics

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The The Effect of UVC Irradiation on the Structure and Swelling Properties of Chitosan Membranes Exposed to Magnetic Fields Ida Wisnu Sari; Wolfharditia Oktaviana Nita; Ni Nyoman Rupiasih; Made Sumadiyasa
BULETIN FISIKA Vol 20 No 2 (2019): BULETIN FISIKA
Publisher : Departement of Physics Faculty of Mathematics and Natural Sciences, and Institute of Research and Community Services Udayana University, Kampus Bukit Jimbaran Badung Bali

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Abstract

Abstract – Research on the effect of UVC radiation exposure on the structure and swelling properties of chitosan membranes exposed to magnetic fields has been carried out. The membrane used is the 2% chitosan membrane that has been exposed to a magnetic field of 1.5 mT in a parallel direction for 2 hours at the time of its formation (formation reaction). Furthermore, the dry membrane obtained was cut to a certain size and irradiated by using UVC radiation for 5, 10, 15 and 30 minutes, each of which was given the names M1, M2, M3 and M4. A comparison is a 2% chitosan membrane with exposure to a magnetic field for 2 hours without exposure to UVC radiation, which is called the control membrane (M0). Characterizations conducted include thickness, swelling (water absorption) and FTIR spectrophotometer. FTIR analysis shows that the OH, NH, CH, C = O, CN, CO and COC functional groups observed on the M0 membrane as well as on the M1, M2, M3, and M4 membranes, with the peaks shifted to smaller or larger wavenumbers. The percentage of transmittance of these functional groups increases with increasing irradiation time from 5 to 15 minutes and decreases in 30 minutes irradiation.
Co-Authors Ida Wisnu Sari Made Sumadiyasa Ni Nyoman Rupiasih