Open AccessAntibacterial plastic made from the composite of silica immobilized with variation of EDTA-Cu and chitosan
Author(s) -
Hermania Em Wogo,
M I B Nama,
Antonius R. B. Ola
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2017/1/012001
Subject(s) - chitosan , antibacterial activity , nuclear chemistry , staphylococcus aureus , chemistry , escherichia coli , absorption (acoustics) , absorption of water , composite number , husk , chromatography , materials science , bacteria , organic chemistry , composite material , biochemistry , biology , botany , genetics , gene
The research is aimed at examining the influence of Cu and chitosan for the antibacterial properties of the plastics made from the composite of Silica gel immobilized with EDTA-Cu and Chitosan. The production of antibacterial plastics consisted of several stages including (1) preparing rice husk ash as the precursor solutions of sodium silicate; (2) producing silica gel immobilized by various Cu concentration (0.001M, 0,0001M, and 0,00001 M); (3) producing antibacterial plastic and examining its water absorption and antibacterial activity against Staphylococcus aureus and Escherichia coli. The result showed that silica immobilized by EDTA-CU could inhibit the growth of bacteria with diameter of zone inhibition observed at 13.3 mm and 12.3 mm for Staphylococcus aureus and Escherichia coli, respectively. Furthermore, the immobilized silica was synthesized into plastics with several variation of mass from chitosan (0.3; 0.5; and 0.7 grams). The antibacterial tests revealed an increase of bacterial inhibition by plastic products with immobilized silica having diameter of zone inhibition for Escherichia coli observed at 14.2 mm greater than Staphylococcus aureus with diameter of zone inhibition at 13.3 mm when tested in total highest chitosan. In contrast, water absorption of the plastic declined (58.33%; 45.45%; 36.36%) as the mass of chitosan increased (0.3; 0.5; 0.7). This indicated that higher mass of chitosan is able to reduce the absorption of water by the plastics but it can enhance the antibacterial properties of the plastic. The research also emphasized that higher concentrations of Cu are correlated with higher antibacterial activity of the plastic.