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All Journal International Journal of Advances in Applied Sciences Jurnal Teknik Kimia Wikrama Parahita : Jurnal Pengabdian Masyarakat CARADDE: Jurnal Pengabdian Kepada Masyarakat Makara Journal of Technology
Emma Savitri
Universitas Surabaya
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences

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TEMPERATURE AND ACETIC ACID CONCENTRATION OPTIMATION IN THE EPOXIDATION REACTION OF PALM OIL METHYL ESTER Emma Savitri, dan Christopher Aditya Sivananda, Edy Purwanto,
Jurnal Teknik Kimia Vol 6, No 1 (2011): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnal_tekkim.v6i1.75

Abstract

Vegetable oils are rich in content unsaturated fatty acid from the type of oleic acid, linoleic acid andlinolenic acid that can be converted to epoxide groups. Epoxidized oil has many useful applications such asplastisizer to improve flexibility, elasticity and stability under the influence of heat and radiation. In thisresearch, palm oil was converted first to become palm oil methyl ester (POME), followed by epoxidationreaction to produce epoxidized palm oil methyl ester (EPOME). Response surface method (RSM) was performedfor optimization and to study the influence of reaction temperature and molar ratioPOME/CH3COOH on the conversion reaction and oxirane value. An optimal reactional condition was shownby high oxirane content which was in the form of oxirane counts/number. Epoxidation reaction was run inthe batch reactor using acetic acid as an oxygen carrier. Central Composite Design (CCD) with two independentvariables and two response function was utilized to investigate the effect of input variables. Theresult shows that reaction conversion increased with the rise of reaction temperature and molar ratio ofPOME/CH3COOH before reaching the maximum point, and then it monotonously decreased. The optimaloperating condition for epoxidation reaction was indicated by maximum oxirane value which could bereached by the reaction temperature of 56.3 oC and molar ratio POME/CH3COOH of 1:0.43Key words: epoxidation, methyl ester, oxirane, palm oil
Peningkatan Keterampilan dan Produktivitas Ekonomis Panti Asuhan Grha Aitam Al Madina Devyani Diah Wulansari; Emma Savitri; Hayuning Purnama Dewi
CARADDE: Jurnal Pengabdian Kepada Masyarakat Vol. 4 No. 2 (2021): Desember
Publisher : Ilin Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31960/caradde.v4i2.1334

Abstract

The purpose of this service program is to improve skills and productivity. economical partner. The method used is through mentoring and training programs by academics from the University of Surabaya related to halal certification, analysis of honey content for quality control and improvement of the packaging process to improve the hygiene of honey products. From the results of this community service program, Partners succeeded in obtaining LPPOM MUI halal certificates for Honey products, analysis of water content, metals, ash, microbial contamination, diastase enzymes, and Hydroxymethyl Furfural (HMF) by SNI 8664-2018, and the honey packaging process through the application of appropriate technology to maintain the hygiene and quality of honey.  
Multistage Sonication Effect on the Composition and Properties of Degraded Chitosan Product Arifin, Nurul Laili; Savitri, Emma; Indah, Anjar; Putra, Fesa; Sumarno, Sumarno
Makara Journal of Technology Vol. 23, No. 1
Publisher : UI Scholars Hub

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Abstract

The sonication method randomly breaks polymer chains to produce a varied distribution of products. A scheme with multi-stage sonication steps is proposed to identify oligomers and low molecular weight chitosan based on changes to the degrad-ed product. For each sonication level, 1% (w/v) chitosan in 1% (v/v) aqueous acetic acid was sonicated for 120 min at 60 °C. The products of the sonication treatment were deprotonized by adding an alkali solution, freeze dried and insoluble product re-sonicated until a low molecular weight was produced. Low molecular weight chitosan/insoluble products were character-ized with Fourier-transform infrared spectra (FT-IR) and X-ray diffraction (XRD) to determine the effect of multistage soni-cation on degree of deacetylation (DD) and degree of crystallinity. The viscosity of the average molecular weight of insolu-ble chitosan was estimated by a viscometric method, while the degree of polymerization (DP) of the chitosan oligomers (COS) were determined by end group analysis. The results showed that the molecular weight of insoluble chitosan decreased and reached a limiting value, (Mlim). The percent yield of oligoglucosamine of the soluble products increased with the num-ber of the sonication stages. The degree of crystallinity of insoluble chitosan increased from 19% to 34.14% while the DD decreased from 82% to 78.1%.
Peningkatan Nilai Ekonomis Madu melalui Pelatihan Pembuatan Fermented Garlic Honey di Panti Asuhan Al-Madina Surabaya Wulansari, Devyani Diah; Savitri, Emma; Kirtishanti, Aguslina; Wulandari, Devyana Dyah; Susilo, Raden Jokokuncoroningrat; Wuryaningsih, Lucia Endang
Wikrama Parahita : Jurnal Pengabdian Masyarakat Vol. 8 No. 2 (2024): November 2024
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/jpmwp.v8i2.7405

Abstract

Berwirausaha merupakan salah satu upaya yang dapat dilakukan untuk membangkitkan kembali perekonomian Indonesia paska pandemi Covid 19. Untuk dapat mengembangkan usahanya sendiri masyarakat harus dapat melakukan kretifitas yang dapat membuat sesuatu yang baru, berbeda dan dapat mengembangkannya. Grha Aitam merupakan panti asuhan berbasis entrepreneur sebagai konsep pemberdayaan anak yatim dan para dhuafa, berbekal dukungan dari stake holder, khususnya donatur. Salah satu bentuk wirausaha yang ditekuni saat ini berupa pengemasan madu. Hasil dari penggalian informasi dengan mitra, konsumen baru yang ditawarkan madu rata-rata kurang tertarik dengan rasa dan bau madu, serta kurangnya wawasan terkait manfaat madu untuk kesehatan. Melalui program pengabdian kepada masyarakat, solusi yang ditawarkan oleh tim Pengusul kepada Mitra adalah membuat sebuah inovasi produk madu berupa Fermented Garlic Honey (FGH) yang menawarkan rasa dan bau lebih menarik serta unik, serta klaim manfaat kesehatan yang baik, dengan menggunakan aplikasi teknologi fermentasi sehingga dapat dihasilkan produk berkualitas. Program ini diawali dengan evaluasi proses pengemasan madu dengan meninjau kembali layout sarana yang digunakan, kemudian diberikan pengetahuan terkait proses pembuatan serta manfaat medis FGH. Hal ini didukung dengan pengadaan alat fermentasi hingga pada pengemasan serta pengujian laboratorium untuk menganalisis kualitas FGH yang dihasilkan. Melalui serangkaian pelatihan yang difasilitasi oleh Tim, mitra dapat menghasilkan produk FGH yang aman, berkualitas dan berdaya jual tinggi.
Eco-friendly durable asphalt using maleic-modified rosin ester Savitri, Emma; Purwanto, Edy; Wisi, Restu Kartiko; Widianto, Aloisiyus Yuli; Pratama, Reyhan Sava; Harijono, Yosafat Gary Tegar
International Journal of Advances in Applied Sciences Vol 14, No 3: September 2025
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijaas.v14.i3.pp793-803

Abstract

Asphalt, a crucial component of transportation infrastructure, particularly in regions with high traffic loads and extreme climates, often lacks the necessary elasticity, strength, and durability. Various asphalt modifiers have been explored, but many struggle with cost, thermal stability, and environmental impact. This study, however, investigates maleic-modified rosin ester, a gum rosin derivative, as a sustainable and cost-effective asphalt modifier. The base asphalt was heated to 150-190 °C, sheared at 100 rpm, and combined with 4-20% maleic rosin ester and sulfur. The modified asphalt was subjected to tests, including penetration, softening point, ductility, density, kinematic viscosity, Fourier transform infrared (FTIR), and dynamic shear rheometer (DSR) tests. The results are promising, showing that maleic rosin ester enhances penetration resistance and softening points while maintaining ductility and viscosity within acceptable limits. Chemical analysis confirmed improved adhesion, crosslinking, and thermal stability, making the modified asphalt more deformation-resistant. This suggests that maleic-modified rosin ester is a viable alternative to synthetic polymers, offering improved durability and sustainability. The enhanced durability of the modified asphalt provides confidence in its long-term performance, making it a reliable choice for transportation infrastructure.
Co-Authors Agung Prayitno Aguslina Kirtishanti Devyana Dyah Wulandari Edy Purwanto Harijono, Yosafat Gary Tegar Hayuning Purnama Dewi Indah, Anjar Kristianto, Fesa Putra Nurul Laili Arifin, Nurul Laili Pratama, Reyhan Sava Raden Joko Kuncoroningrat Susilo Sumarno . Syamsul Ph.D M.A. Hadi Widianto, Aloisiyus Yuli Wisi, Restu Kartiko Wulansari, Devyani Diah Wulansari, Devyani Diah Wuryaningsih, Lucia Endang