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All Journal International Journal of Renewable Energy Development Jurnal AGROTEKNOLOGI Jurnal Ilmu Dasar BERKALA SAINSTEK Pelita Perkebunan Alchemy Jurnal Penelitian Kimia Jurnal Kimia Mulawarman UNEJ e-Proceeding Jurnal Kimia Riset Jurnal Pemberdayaan Masyarakat Madani (JPMM) ALCHEMY Jurnal Penelitian Kimia J-Dinamika: Jurnal Pengabdian Kepada Masyarakat Jurnal Abdi: Media Pengabdian Kepada Masyarakat Computational and Experimental Research in Materials and Renewable Energy (CERiMRE) Indonesian Chimica Letters Warta LPM Molekul: Jurnal Ilmiah Kimia International Journal of Renewable Energy Development Engagement: Jurnal Pengabdian Kepada Masyarakat al Kimiya : Jurnal Ilmu Kimia dan Terapan
Bambang Piluharto
Department Of Chemistry, Universitas Jember, Jl. Kalimantan 37 Kampus Tegalboto, Jember 68121
Religion Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mathematics Physics Social Sciences Other

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The Influence of Cellulose Acetate Concentration for Ultrafiltration Membranes Apriliasari, Yekti; Indarti, Dwi; Oktavianawati, Ika; Piluharto, Bambang
Indonesian Chimica Letters Vol. 2 No. 2 (2023)
Publisher : Department of Chemistry, Faculty of Mathematics and Natural Sciences, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/icl.v2i2.5618

Abstract

Separation process using a membrane is a common method used in many fields. The objective of this research is to find out the influence of polymer concentration on the physical properties and performance of cellulose acetate as an ultrafiltration membrane. The cellulose acetate membrane is made by phase inversion technique. This technique is carried at by dissolving cellulose acetate in a range of concentration (18%, 19%, 20%, 21%, and 22%) in the solvent (acetone/DMSO = 15%/60%) and DMP as additives (3% mL). Then the mixtures homogenized and added PEG400 for 10% of cellulose acetate concentration (% w/w), strired ± 12 hours left in place until the buble disappeared. Then the dope solution is printed the glass plate, evaporated for 3 minutes, and immersed in a coagulation bath containing 5% acetone. The results suggest that the greater the concentration of cellulose acetate membrane increase the number density while the swelling degree decrease. The performance of the membrane showed that the greater concentration of cellulose acetate will water of flux the membrane decrease and rejection coefficient increase. Cellulose acetate membrane by varying the concentration of 21% and 22% included in the classification of ultrafiltration membranes for rejection coefficient value (90,37% and 91,43%) 90% may rejection by a membrane.
Preparation of Alginate/Lignosulfonat as Shell Materials For Neem Oil Encapsulation Dea putri Ismawardani; Dwi Indarti; Bambang Piluharto
Indonesian Chimica Letters Vol. 4 No. 2 (2025)
Publisher : Department of Chemistry, FMIPA, UNEJ

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Abstract

Azadirahtin is one of the active ingredients in neem oil which acts as an antifeedant and repellant for several types of insects so it is widely used as a pesticide. However, Azadirahtin has a weakness that is susceptible to light which is easy to degrade. The purpose of this study was to encapsulate azadirahtin in neem oil in a lignosulfonate/alginate matrix. Here there are two types of lignosulfonate (LS): LS from technical materials and LS from pure analysis (PA) (higher purity level). The preparation of the alginate matrix was carried out through the ionic gelation method. Characterization of the beads obtained included the degree of swelling carried out using the gravimetric method, the structure using FTIR and the stability of photodegradation using the UV-VIS spectrophotometry method. The results obtained showed that physically the beads had a hydrogel texture with a brownish yellow color. The swelling behavior of the beads showed differences in the degree of swelling pattern of beads with the addition of technical LS and LS Pure analysis (PA). The addition of LS PA Increasing the soaking time increases the degree of swelling, while beads with the addition of Technical LS produce fluctuating degree of swelling. Meanwhile, the results of the photodegradation stability test, a shorter distance between the UV light source and the object shows a higher photodegradation rate
Co-Authors A Sjaifullah Abdulloh Abdulloh Achmad Sjaifullah Achmad Subagio Achmad Subagio Afif Difa Asy Syafiq, Muhammad Agus Triono Agus Wedi Pratama Ahmad Roziq Ahmad Turidi Ahmad, Zakiyyah Ilma Anak Agung Istri Ratnadewi Ancah Caesarina Novi Marchianti Ancah Caesarina Novi Marchianti Anggia Rose Sukaton Aprilia, Selvina Rizky Apriliasari, Yekti Asnawati Asnawati Asnawati Asnawati Bayu Rudiyanto Busroni, Busroni D. Iwan Setiawan Dafit Ari Prasetyo Dea putri Ismawardani Deltaningtyas Tri Cahyaningrum Deltaningtyas Tri Cahyaningrum Dharmawan, Aditya Dwiki Diah Ayu Nur Sholehah Djamali, R. Abdoel Dwi Indarti Dwi Jayanti, Denik Dwi Kusuma Wahyuni Dwiyanti, Inayatus Nur Erix Nurharianto Fatwa, Muhammad Iqbal Firdaus Ubaidillah, Firdaus Firmanto, Hendy HARDIAN SUSILO ADDY Henry Adi Syahputra Sidabutar Hermanto, Toto I Rahmawati Ika Oktavianawati Imam Syafi’i Indarto Indarto Indarto Indarto Intan Rida Agustina Irsyam, Mahrus Istiqomah Rahmawati Iswahyono Iswahyono Iswahyono Iswahyono Karisma Wulan Ningtyas Khofifah, Marhamatul Lulus Kartika Ningtias Mahrus Irsyam Maryanto - Maryanto Maryanto Miftah Hijriawan Moch. Shulthoni, Moch. Mufrihah Nurhayati Muhammad Reza Naning Retnowati Naning Retnowati Nida Andriana Nur Aisyah Nurud Diniyah Nurud Diniyah Purkan Purkan, Purkan Purwo Handoko, Donatus Setyawan R. Abdoel Djamali R. Abdoel Djamali R. Indahsari Riska Rian Fauziah Riska Rian Fauziah S. Purwo Handoko, Donatus Siswoyo Siswoyo Siti Rofiqoh, Siti Sofijan Hadi Sri Sumarsih Sudarko Sudarko, S. Sulistyo, Yudi Aris Sulistyowati, Fitri Syahbanu, Intan Syahrul Khairi Tanti Haryati Tinok Dwi Ananda Totok Prasetyo Tri Mulyono Tri Mulyono Ula, Mohammad Munal Ummami, Riza Wulandari, Melysa Wuryanti Handayani Yeni Maulidah Muflihah Yudi Aris Sulistiyo, Yudi Aris Yulvia, Ana Zeni Ulma Zulfikar Zulfikar