Plester luka yang ada di pasaran pada umumnya masih menggunakan bahan sintetis, sehingga dapat menimbulkan reaksi hipersensitif pada luka. Oleh karena itu, dibutuhkan plester luka berbahan dasar alami. Penelitian ini bertujuan untuk mengetahui efektivitas daun sirih dan madu sebagai plester luka hidrogel PVA (Polivinil Alkohol)/kitosan yang alami dalam menghambat bakteri S. aureus dan E. coli, dan mengetahui tingkat elastisitasnya. Metode penelitian ini adalah eksperimen dengan 3 perlakuan. Ekstraksi daun sirih hijau dan madu menggunakan metode maserasi dengan variasi konsentrasi yakni 5wt%, 15wt%, dan 25wt%. Setiap konsentrasi ditambahkan dengan PVA dan kitosan lalu dipanaskan pada suhu 85ºC selama 5 jam hingga terbentuk membran. Membran tersebut diuji antibakteri, kuat tarik, dan SEM. Hasil penelitian ini menunjukkan konsentrasi 15 wt% ekstrak daun sirih hijau memiliki aktivitas antibakteri yang paling efektif pada bakteri S. aureus dan E. coli adalah (16,8 0,47) mm dan (18,4 0,35) mm. Sedangkan pada konsentrasi 25 wt% hidrogel memiliki nilai kuat tarik paling baik sebesar 0.219 MPa, modulus elastisitas 0.09 MPa, dan memiliki struktur morfologi berpori dan halus namun masih terdapat aglomerasi.
Dependence on the need for electrical energy on PLN will undoubtedly require a high cost. Energy independence around the PPPI Al-Ittihad hut as a partner can minimize expenses and realize an Islamic life based on information technology and independence in energy. This problem has prompted the Malang State University community service team to install solar panels at PPPI Al-Ittihad based on smart PLTS that can be monitored in real-time. This installation serves as a source of electrical energy to meet the electricity needs of PPPI Al-Ittihad. Community service is carried out by observing, calculating load requirements, making designs, installing solar cell systems, and installing solar panel systems. The electricity generated by the smart PLTS is used for the daily needs of PPPI Al-Ittihad. Besides that, the PLTS could be the renewable energy learning media for students and IoT-based information technology. The installation of PLTS is very useful for PPPI Al-Ittihad, which has a daily power load of 4 kWh to reduce the estimated cost of electricity consumption which previously depended on PLN.Mufti, dkk.
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