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All Journal Jurnal Riset Kimia Cendekia : Jurnal Pengabdian Masyarakat
Mochammad Purwanto
Departement Of Chemical Engineering, Institut Teknologi Kalimantan, East Kalimantan
Humanities Chemistry Economics, Econometrics & Finance Education Languange, Linguistic, Communication & Media Social Sciences

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Fabrication and Characterization of Chitosan/N-Phthaloyl Composite Membrane for DMFC Application Christine Dyta Nugraeni; Lukman Atmaja; Nur Hayati; Mochammad Purwanto; Mardi Santoso; Yuli Kusumawati
Jurnal Riset Kimia Vol. 12 No. 2 (2021): September
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrk.v12i2.408

Abstract

Modified chitosan membrane is one of the promising membranes for polymer electrolyte membrane. Chitosan/N-phthaloyl chitosan composite membranes were fabricated to obtain high proton conductivity and low methanol permeability. Membranes were fabricated by casting method and solvent evaporation. Surface morphology, mechanical analysis, methanol permeability, and proton conductivity were used to characterize the overall properties. FT-IR spectra exhibited the presence of interaction of chitosan and n-phthaloyl/chitosan. SEM analysis showed that the surface roughness of composite membrane increases as the n-phthaloyl loading increases. The highest proton conductivity of synthesized membrane is at 2.4 mS.cm-1 and is higher than pristine chitosan membrane at 1.6 mS.cm-1. Moreover, with n-phthaloyl/chitosan addition, the methanol permeability was also improved. The correlation between proton conductivity and methanol permeability in composite membranes suggests that the blend has its potential in DMFC application.
Peningkatan Kualitas Pembelajaran Kimia melalui Praktikum Titrasi di SMA Negeri 5 Balikpapan Ashadi Sasongko; Sri Sulastri; Adrian Gunawan; Moch Purwanto
Cendekia : Jurnal Pengabdian Masyarakat Vol 2 No 2 (2020): Desember
Publisher : LPPM UNIVERSITAS ISLAM KADIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (535.339 KB) | DOI: 10.32503/cendekia.v2i2.891

Abstract

Ketersediaan laboratorium kimia di SMA sangat diperlukan untuk meningkatkan kualitas pembelajaran melalui metode praktikum. Kecukupan jumlah guru dan laboran juga sangat mempengaruhi kelancaran pelaksanaan praktikum. SMA Negeri 5 Balikpapan merupakan salah satu SMA ternama yang memiliki alat dan bahan praktikum kimia cukup memadai, namun sempat mengalami kekosongan kegiatan praktikum. Tim dosen dan mahasiswa Prodi Teknik Kimia Institut Teknologi Kalimantan (ITK) melakukan identifikasi untuk mengetahui alat dan bahan yang dapat digunakan. Hasil identifikasi menunjukkan bahwa alat dan bahan yang ada memadai untuk berbagai materi praktikum kimia, termasuk praktikum titrasi asam basa, yang termasuk materi sulit dalam ilmu kimia. Modul praktikum disiapkan untuk menjadi acuan bagi siswa. Pre-test dan post-test digunakan untuk mengetahui dampak pelaksanaan praktikum titrasi. Praktikum titrasi menunjukkan dampak yang signifikan dalam mengoptimalkan pemanfaatan laboratorium kimia dan meningkatkan pemahaman siswa terhadap titrasi asam basa.
Co-Authors Adrian Gunawan Ashadi Sasongko Lukman Atmaja Mardi Santoso Nugraeni, Christine Dyta Nur Hayati Sri Sulastri Yuli Kusumawati