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All Journal International Journal of Marine Engineering Innovation and Research Jurnal Redoks : Jurnal Pendidikan Kimia dan Ilmu Kimia
Ani Purwanti
Universitas AKPRIND Indonesia
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation

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Optimization of the Mechanical Properties of Bio-degradable Plastics from Chitosan with Acetic Acid Solvent Ani Purwanti; Eka Sulistyaningsih; Wisnu Prayogo; Muhammad Yusuf
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 3 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i3.5116

Abstract

Shrimp shell waste contains chitin which can be processed into chitosan. Chitosan can be utilized as an edible plastic. The film is expected to maintain food quality by resisting water vapour transfer as a preservative and maintaining odour. Edible plastics as food protectors are expected to have optimal mechanical properties. Chitosan films are brittle, so plasticizers are used to increase their flexibility. The mechanical properties of the film may change during storage time. The decline in film quality is expected to be fast enough to allow edible plastics for food wrapping. This study aims to determine the effect of glycerol addition and film storage time on the mechanical properties of edible chitosan film. From the results obtained, adding glycerol plasticizer produces films with thickness and elongation that tend to increase. In contrast, the tensile strength value increases and then decreases with the addition of glycerol. The optimal mechanical strength value was obtained in the film solution with glycerol at 0.3 mL/g chitosan with a maximum tensile strength of 200 kgf/cm2 and a per cent elongation of 135%. The thickness of the film produced was 0.17 mm. The film produced in this study has met the standards of film mechanical strength (tensile strength and per cent elongation) based on the Japanese Industrial Standard (JIS). Meanwhile, based on the Indonesian National Standard (SNI), the tensile strength value produced in this study has yet to meet the SNI standard.
A Review: Green Life And Behavior Change for Net Zero by Non Governmental Organizations Wisnu Prayogo; Rachmat Mulyana; Janter Pangaduan Simanjuntak; I Wayan Koko Suryawan; Laili Fitria; Edo Barlian; Putri Lynna A. Luthan; Dion Awfa; Ahmad Daudsyah Imami; Rifka Noor Azizah; Ani Purwanti; Sitepu Amrina Rosyada; Vemi Ridantam; Zhilli Izzadati Khairuni
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 3 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i3.5178

Abstract

Global warming and environmental issues are being caused by the overuse of fossil fuels and increased industrialization around the world, which has resulted in the production of greenhouse gases. As a result, it's crucial to reach net-zero carbon emissions. By balancing the total quantity of carbon dioxide or other greenhouse gas emissions over a specific period and taking actions that are ecologically responsible, net zero carbon emissions can be accomplished. For environmental sustainability to be successful, it must be able to influence people's attitudes and behavior toward the environment. To understand NGOs' obligations in supporting net-zero carbon emissions, this paper presents a methodical debate utilizing NGOs as case studies. The method is employed in this work by reviewing the body of primary and secondary research on the study issue. This essay initially lists different environmental NGOs organizations before categorizing and outlining some of the significant GHGs reduction initiatives made by these organizations. This essay also addresses key issues that must be addressed upon to achieve the best outcomes. This report gives a broad overview of the synergizing domains that NGOs around the globe work in to assist improvement environmental security.
PENGARUH PURIFIKASI PRODUCER GAS TERHADAP NILAI KALOR PRODUCER GAS Ani Purwanti; Mutiara Nursavira
JURNAL REDOKS : JURNAL PENDIDIKAN KIMIA DAN ILMU KIMIA Vol 8 No 2 (2025): Jurnal Redoks : Jurnal Pendidikan Kimia dan Ilmu Kimia
Publisher : Program Studi Pendidikan Kimia STKIP Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33627/re.v8i2.3470

Abstract

Pengembangan energi ramah lingkungan di Indonesia diarahkan pada pemanfaatan biomassa, termasuk sekam padi yang potensinya belum dimanfaatkan secara optimal. Penelitian ini bertujuan mengubah limbah sekam padi menjadi Compressed Producer Gas (CPG) melalui proses gasifikasi dalam reaktor downdraft, gas hasil gasifikasi dibersihkan menggunakan wet scrubber untuk menghilangkan abu dan tar, lalu dikompresi agar dapat disimpan dan digunakan kembali. Variasi tekanan aliran air dalam scrubber adalah 0,8; 1,2; dan 1,6 bar. Evaluasi dilakukan terhadap komposisi gas (CO, H₂, CH₄, CO₂) serta nilai kalor (HHV) sebelum dan sesudah scrubber menggunakan Gas Chromatography. Pada tekanan 1,2 bar, hasil uji gas kromatografi menunjukkan bahwa kandungan gas mudah terbakar (CO, H2, CH4) dan HHV meningkat setelah proses scrubber. Namun, nilai HHV turun untuk gas sesudah scrubber pada tekanan air 1,6 bar karena kelembapan gas meningkat. Komposisi gas mudah dibakar yang terkandung pada producer gas pada saat proses sebelum scrubber tertinggi diperoleh pada proses menggunakan tekanan air scrubber sebesar 1,6 bar dengan hasil konsentrasi total sebesar 18,054% dari total gas yang dihasilkan dan konsentrasi gas sesudah scrubber sebesar 10,923% dari total gas yang dihasilkan. Studi ini menunjukkan bahwa sistem CPG dari sekam padi dapat digunakan sebagai alternatif energi bersih yang mendukung ekonomi hijau (green economy).
OPTIMASI PROSES DEASETILASI KITIN BERBASIS MICROWAVE UNTUK PRODUKSI KITOSAN DENGAN DERAJAT DEASETILASI TINGGI Ani Purwanti
JURNAL REDOKS : JURNAL PENDIDIKAN KIMIA DAN ILMU KIMIA Vol 9 No 1 (2026): Jurnal Redoks : Jurnal Pendidikan Kimia dan Ilmu Kimia
Publisher : Program Studi Pendidikan Kimia STKIP Bima

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33627/re.v9i1.4243

Abstract

Kitosan merupakan biopolimer hasil deasetilasi kitin yang banyak dimanfaatkan pada berbagai bidang karena bersifat biodegradable dan biokompatibel. Namun, proses deasetilasi konvensional cenderung memerlukan kondisi operasi yang ekstrim sehingga berpotensi menyebabkan degradasi rantai polimer dan penurunan yield kitosan. Penelitian ini bertujuan untuk mengoptimasi proses deasetilasi kitin berbasis microwave guna memperoleh kitosan dengan derajat deasetilasi (DD) ≥ 75% dan degradasi massa yang minimal. Optimasi dilakukan secara simultan terhadap beberapa parameter proses, meliputi konsentrasi NaOH (40–70% b/v), suhu reaksi (60–80 °C), daya microwave (300–600 W), dan rasio pelarut NaOH:kitin (1:10–1:20 b/v). Derajat deasetilasi ditentukan menggunakan analisis FTIR, sedangkan yield kitosan dihitung berdasarkan perbandingan massa kitosan kering terhadap massa awal kitin. Hasil penelitian menunjukkan bahwa peningkatan intensitas kondisi proses mampu meningkatkan derajat deasetilasi, namun secara bersamaan menurunkan yield kitosan akibat degradasi rantai polimer. Kondisi optimum diperoleh pada konsentrasi NaOH 60% (b/v), suhu 70 °C, daya microwave 450 W, dan rasio NaOH:kitin 1:15 (b/v), yang menghasilkan kitosan dengan derajat deasetilasi ≥ 75% dan yield sekitar 70%. Hasil ini menunjukkan bahwa optimasi simultan parameter proses efektif dalam menghasilkan kitosan bermutu tinggi dengan efisiensi proses yang baik.
Co-Authors Ahmad Daudsyah Imami Dion Awfa Edo Barlian Eka Sulistyaningsih Fitria, Laili Janter Pangaduan Simanjuntak Muhammad Yusuf Mutiara Nursavira Putri Lynna A. Luthan Rachmat Mulyana Rifka Noor Azizah Sitepu Amrina Rosyada Suryawan, I Wayan Koko Vemi Ridantam Wisnu Prayogo Zhilli Izzadati Khairuni