Published date: Mar 27 2024

Journal Title: KnE Life Sciences

Issue title: International Conference On Mathematics And Science Education (ICMScE 2022): Life Sciences

Pages: 51–65

DOI: 10.18502/kls.v8i1.15394

Eli Rohaetieli_rohaeti@uny.ac.idDepartment of Chemistry Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, 55281, Indonesia

Amalia Sultan Nanda AnnisaDepartment of Food Science and Technology, Faculty of Agricultural Technology, Institut Pertanian Bogor, Indonesia

Rusita .Department of Chemistry Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, 55281, Indonesia

Kun Sri BudiasihDepartment of Chemistry Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, 55281, Indonesia

Nur Aeni AriyantiDepartment of Biology Education, Faculty of Mathematics and Natural Science, Universitas Negeri Yogyakarta, 55281, Indonesia

The objectives of this study were to determine the effects of modification of goat skin with silver nanoparticles prepared using brown algae (Padina sp.) and assisted microwave on hydrophobic properties, antimicrobial activity, mechanical properties, and biodegradability of goat skin. The synthesis of silver nanoparticles was carried out using the microwave method with a bioreductor of brown algae extract (Padina sp.) and a stabilizer of a starch solution. Characterization of the resulting silver nanoparticles was conducted by determining the wavelength utilizing the UV-Vis instrument and the particle size with a particle size analyzer (PSA). Characterization of the modified goat skin was conducted by measuring hydrophobicity through the sessile drop method, the antimicrobial activity test on modified goat skin was done by determining the clear zone against Escherichia coli (gram-negative bacteria) and Staphylococcus epidermidis (gram-positive bacteria). The mechanical properties of modified goat skin were analyzed by measuring the tensile strength of the skin. The characterization with UV-Vis on the resulting silver nanoparticles revealed 426 nm in maximum absorption and the diameter of silver nanoparticles by using PSA was 58.2 nm. Based on atomic absorption spectroscopy (AAS), the study showed that as many as 99.25% of silver nanoparticle has coated the surface of pickle goat skin. The modification of goatskin by adding silver nanoparticle can increase antibacterial activity of goatskin. The contact angle and the tensile strength of goatskin after modification were 81.49o and 14.63 MPa. The clear zone of goatskin after modification against Staphylococcus epidermidis and Escherichia coli were 9.33 mm and 8.87 mm, respectively. Meanwhile, the best biodegradability was the unmodified goatskin. Thus, modification by nanoparticles can decrease the biodegradability of goatskin.

Keywords: pickle goatskin, silver nanoparticles, brown algae

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