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All Journal Prosiding Seminar Hasil Penelitian dan Pengabdian Kepada Masyarakat JURNAL REKAYASA KIMIA & LINGKUNGAN
Rahmi, Hertantri Yulia
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Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Energy Engineering Environmental Science Mechanical Engineering

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Preparation and Characterization of Nanocrystalline Cellulose from Cassava Stem Wastes by Electromagnetic Induction Lismeri, Lia; Rahmi, Hertantri Yulia; Gomiyati, Nada Afifah; Darni, Yuli; Febriningrum, Panca Nugrahini; Azhar, Azhar
Jurnal Rekayasa Kimia & Lingkungan Vol 16, No 2 (2021): Jurnal Rekayasa Kimia & Lingkungan (December, 2021)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v16i2.21927

Abstract

Cassava stems were one of the largest agricultural by products in Indonesia, especially in Lampung Province. It is known that cassava stems have a fairly high lignocellulose content, especially cellulose which reaches 39.29%. The high cellulose content in cassava stems has great potential to be used as raw material for Nanocrystalline Cellulose (NCC). The preparation of nanocrystalline cellulose consists of four main stages, namely: pre-hydrolysis, delignification, bleaching, and acid hydrolysis. The pre-hydrolysis stage was carried out by boiling a solution of CH3COOH and cassava stem powder for 60 minutes at a temperature of 105oC. Cassava stem powder was then delignified using a 25% NaOH solution heated to a temperature of 105oC for 1 hour. The bleaching stage used a 3.5% NaOCl solution at a temperature of 50oC for 60 minutes and was carried out twice. The last step is acid hydrolysis using 2.5N HCl solution for 15 minutes at a temperature of 105oC, then the electromagnetic induction treatment is varied with temperature variations of 30oC, 50oC, and 70oC for 60 minutes. The prepared nanocrystalline cellulose were tested for lignocellulose, XRD and PSA. From the test results, the best variation of nanocrystal cellulose preparation was acid hydrolysis treatment with 70oC electromagnetic induction for 60 minutes, namely an increase in the percentage of cellulose 62.93%, crystallinity 90.68%, and an average particle size of 18.04m with some particles measuring nanometers. From the results of the research, it was concluded that electromagnetic induction increased crystallinity and decreased the size of nanocrystalline cellulose.
Isolasi Selulosa dari Tandan Kosong Kelapa Sawit Menggunakan Deep Eutectic Solvent (DES) Berbasis Kolin Klorida dan Asam Laktat Rahmi, Hertantri Yulia; Kusumastuti, Yuni; Hidayat, Muslikhin
Sehati Abdimas Vol 7 No 1 (2024): Prosiding Sehati Abdimas 2024
Publisher : PPPM POLTESA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47767/sehati_abdimas.v7i1.912

Abstract

Tandan kosong kelapa sawit (TKKS) merupakan limbah padat yang dihasilkan dari proses pengolahan minyak kelapa sawit. Berdasarkan penelitian Sudiyani et al. (2013), TKKS mengandung lignoselulosa dengan komposisi tinggi, yakni 37,26% selulosa, 14,62% hemiselulosa, 31,68% lignin, 6,69% abu dan 1,34% zat ekstraktif. Kandungan selulosa pada TKKS memiliki potensi untuk dimanfaatkan menjadi produk bernilai ekonomis, namun perlu dilakukan treatment untuk mengisolasi selulosa dari senyawa lainnya. Salah satu metode yang digunakan untuk isolasi selulosa adalah ekstraksi padat-cair atau delignifikasi menggunakan pelarut ramah lingkungan yaitu deep eutectic solvent (DES). Dalam penelitian ini, DES dibuat dengan mencampurkan Hydrogen Bond Acceptor (HBA) berupa kolin klorida dan Hydrogen Bond Donor (HBD) berupa asam laktat. Variabel penelitian meliputi rasio molar HBA:HBD yang bervariasi, yaitu 1:1, 1:5, dan 1:10 serta suhu ekstraksi 70, 90, dan 110oC. Hasil ekstraksi dianalisis menggunakan metode Chesson untuk menentukan variasi terbaik berdasarkan persentase selulosa dan lignin. Hasil penelitian menunjukkan bahwa kondisi operasi dengan rasio molar HBA:HBD 1:10 pada suhu 110oC mampu menghasilkan selulosa tertinggi dan lignin terendah, masing-masing sebesar 59,45% dan 6,64%. Berdasarkan hasil ini, ekstraksi menggunakan deep eutectic solvent berbasis kolin klorida-asam laktat berpotensi digunakan sebagai salah satu metode ramah lingkungan dalam isolasi selulosa TKKS.
Co-Authors Azhar Azhar Gomiyati, Nada Afifah Lismeri, Lia Muslikhin Hidayat Panca Nugrahini Febriningrum Yuli Darni Yuni Kusumastuti, Yuni