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All Journal Dekave : Jurnal Desain Komunikasi Visual Jurnal Pendidikan Kimia Universitas Riau Prosiding Seminar Nasional Teknoka Jurnal Rekayasa Material, Manufaktur & Energi Jurnal Rekayasa Hijau Abdimas Umtas : Jurnal Pengabdian kepada Masyarakat Mitra Akademia: Jurnal Pengabdian Masyarakat Jurnal Inkofar Journal Of Research and Education Chemistry (JREC) JURNAL POLI-TEKNOLOGI Jurnal Teknologi Pangan dan Industri Perkebunan
Emmidia Djonaedi
Politeknik Negeri Jakarta
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Pemanfaatan Sabut Kelapa Sebagai Bahan Dasar Tinta Batik Hitam Melalui Proses Pirolisis Hapsari, Putri Uniqa Hapsari; Kusumantoro, HB. Rudi; Djonaedi, Emmidia
Jurnal Pendidikan Kimia Universitas Riau Vol. 10 No. 2 (2025): Juli: Jurnal Pendidikan Kimia Universitas Riau
Publisher : Program Studi Pendidikan Kimia, FKIP, Universitas Riau

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Abstract

Batik is a world-recognized cultural heritage of Indonesia, but the batik industry still relies on synthetic dyes that pollute the environment, especially water pollution. This study aims to develop natural black batik ink from coconut fibre through pyrolysis and analyse its colour density. The process is carried out by heating coconut fibre at 150-250°C to produce charcoal, which is then pulverized into pigments. The pigments were mixed with distilled water (variation of 1-7 g pigment and 6-12 mL distilled water) and tested for density using a spectrodensitometer. The results showed that the formulation of 6 grams of pigment and 11 mL of distilled water produced the highest concentration (2.68). The average concentration of all samples reached 2.57, indicating the consistency of pigment quality. This study proves that the ratio of pigment and solvent affects colour density, while providing an environmentally friendly solution by utilizing coconut fibre waste as a natural dye with economic value.
UJI EFEKTIVITAS METODE PEMBUATAN BIOKERAMIK CANGKANG TELUR MENGGUNAKAN SODIUM ALGINAT DAN PATI JAGUNG Khalyla Hafsa Khairunnisa; Mustofa Kamal, Dianta; Djonaedi, Emmidia
Journal of Research and Education Chemistry Vol. 7 No. 2 (2025): Oktober
Publisher : UIR Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jrec.2025.vol7(2).20065

Abstract

The utilization of eggshell waste in Indonesia is still very low, which is only around 7-8% of the total waste of 611,790 tons per year, although the calcium carbonate content has the potential to be used as a raw material for bioceramics. Suboptimal utilization risks polluting the environment. This study aims to develop the utilization of eggshell waste into bioceramics by comparing the effectiveness of two types of binders, namely sodium alginate and corn starch. The manufacturing method includes the process of powdering eggshells, mixing with binders, molding, and drying. Evaluation is carried out through density testing, water absorption, and degradation tests in water. The results showed that bioceramics with corn starch had a higher density (2.05 g/m³), lower water absorption (34.5%), and neutral pH of the degradation water (pH 7), compared to sodium alginate which had a lower density and higher absorption (50.5%) with pH 8. These findings indicate that corn starch is superior in forming stable and solid bioceramics, so it has the potential to be applied in environmentally friendly craft products and supports the reduction of organic waste in the community.
ANALISIS VARIASI WAKTU DELIGNIFIKASI DAN KONSENTRASI DEKSTRIN TERHADAP PEMBUATAN KERTAS TISU SERBET DARI LIMBAH TONGKOL JAGUNG Sukmawijaya, Raiqa Biyan; Rizkia, Vika; Djonaedi, Emmidia
Jurnal Inkofar Vol 9, No 2 (2025)
Publisher : Politeknik META Industri Cikarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46846/jurnalinkofar.v9i2.444

Abstract

This study explores the potential of corn cobs as an alternative raw material for environmentally friendly tissue paper production. Corn cobs are rich in cellulose but contain lignin, which must be removed through a delignification process. In this research, soda delignification was applied with varied durations (30, 60, and 90 minutes), combined with the use of dextrin as a binding agent at concentrations of 5%, 10%, and 15%. The resulting tissue paper was evaluated based on Indonesian National Standards (SNI), focusing on tensile strength, water absorbency, sheet integrity, and grammage. The results showed that a delignification time of 60–90 minutes combined with 10–15% dextrin produced the best quality tissue paper. The sample treated for 60 minutes with 15% dextrin exhibited the highest tensile strength (400 N/m), while the sample treated for 90 minutes with 5% dextrin achieved the highest water absorbency (114 mm/10 minutes). These findings indicate that corn cob waste holds significant potential as a sustainable raw material for tissue paper production, supporting green manufacturing principles and agricultural waste valorization.
Pengaruh Aluminium Sulfat Terhadap Lightfastness Tinta Printer Kluwek Ramah Lingkungan Fallah, Faisal Akbar; Pratama, Yoga Putra; Djonaedi, Emmidia
Rekayasa Hijau : Jurnal Teknologi Ramah Lingkungan Vol 9, No 3 (2025)
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/jrh.v9i3.45-54

Abstract

Kesadaran masyarakat dan kebijakan pemerintah yang semakin menekankan pentingnya pelestarian lingkungan telah mendorong peningkatan permintaan terhadap produk yang lebih ekologis. Dalam konteks industri percetakan, salah satu solusi untuk mengurangi dampak limbah tinta adalah dengan menciptakan tinta berbahan dasar alami yang lebih ramah lingkungan. Penelitian ini mengeksplorasi penggunaan pigmen alami dari buah kluwek (Pangium edule) sebagai komponen utama dalam pembuatan tinta inkjet yang berkelanjutan. Fokus kajian tertuju pada pengaruh penambahan aluminium sulfat sebagai fiksator daya tahan warna tinta terhadap pemudaran akibat cahaya. Dengan menggunakan desain eksperimen satu faktor, dilakukan variasi massa aluminium sulfat antara 0,4%, 0,8%, 1,2% gram. Pengujian dilakukan dengan mengamati perubahan nilai warna berdasarkan CIE L*a*b* untuk mengevaluasi ketahanan terhadap cahaya. Hasil menunjukkan bahwa meskipun peningkatan massa aluminium sulfat menurunkan intensitas warna awal tinta, senyawa ini mampu meningkatkan stabilitas warna terhadap paparan cahaya. Temuan ini mengindikasikan bahwa formulasi tinta berbasis kluwek dengan tambahan aluminium sulfat memiliki potensi sebagai alternatif tinta inkjet ramah lingkungan.Kata kunci: tinta, kluwek, aluminium sulfat, CIE L*a*b*
Co-Authors Chia-Fen Chi, Chia-Fen Delila Mediana Dini Handayani Dini Handayani, Dini Diyah Ayu Dwi Agnes Natalia Bangun Endang Yuniarti Endang Yuniarti Endang Yuniatri Fallah, Faisal Akbar Fauzia Dianawati, Fauzia Gunawan, Muhammad Budi Hapsari, Putri Uniqa Hapsari HB Rudi Kusumantoro HB. Rudi Kusumantoro Khalyla Hafsa Khalyla Hafsa Khairunnisa Kusumantoro, HB Rudi Kusumantoro, HB. Rudi Moch Yana Hardiman Mustofa Kamal, Dianta Nabila Putri Azzahra Nisrina Zahrah, Firyal Pratama, Yoga Putra Rachmah Nanda Kartika Rachmah Nanda Kartika Rachmah Nanda Kartika Rudi Kusumantoro, Heribertus Salsabila, Salsabila Sukmawijaya, Raiqa Biyan T. Yuri Zagloel, T. Vika Rizkia Yoga Putra Pratama Yoga Putra Pratama Zahira Adni Shaffa, Ghaitsa