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.
Highlights
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
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
Summary
A. Membran kitosan Membran kitosan adalah membran yang terbuat dari polimer alam, kitosan sebagai bahan dasar (matrik) dan pelarutnya. Sebagai pelarut dapat digunakan larutan asam asetat 1%, asam format 10% dan asam sitrat 10%, karena keterlarutan kitosan adalah paling baik dalam larutan-larutan tersebut [6]. Membran kitosan mempunyai karakteristik atau sifat yang sangat bergantung pada beberapa faktor yaitu metode atau cara pembuatan, komposisi kitosan terhadap pelarutnya, serta kondisi lingkungan pada saat membran dibuat [7]. Beberapa metode yang biasa digunakan dalam mengkarakterisasi membran diantaranya spektrofotometer FTIR (Fourier Transform Infra-Red), uji tarik dan uji daya serap air (swelling)
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