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All Journal Indonesian Journal of Chemical Science JURNAL REKAYASA KIMIA & LINGKUNGAN Jurnal Teknologi dan Inovasi Industri
Azwar, Edwin
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Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering

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Journal : JURNAL REKAYASA KIMIA

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Sodium Hydroxide Treatment for Cellulose Fiber Accessibility from Corncobs under Microwave Assistive Hanif, Muhammad; Krisanti, Aknasasia Virginia; Salfitri, Selvy; Darni, Yuli; Utami, Herti; Azwar, Edwin; Gunawan, Poernomo
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.v16i2.20061

Abstract

Corncob is abundantly available lignocellulosic biomass resources obtained from crops harvesting and found to be solid waste accumulation on a field. Less corncob is used as a solid fuel for cooking, and a more significant portion is vanished on the field by burning. Promisingly, corncob contains considerable cellulose as one value-added component potentially utilized as biomaterial or biofuel feedstock. However, the presence of lignin in natural lignocellulosic biomass results in recalcitrant structure and hinders cellulose accessibility. This study aimed to investigate microwave-assisted alkaline treatment to retain cellulose in the solid product while removing other impurities in corncob, especially hemicellulose and lignin. Sodium hydroxide was selected as a chemical with some variations in concentration. The chemical treatment was carried out under 400 W microwave power with various residence times and a 1:10 solid to liquor ratio. The cellulose content upgraded from 26.97% to 71.26% while reducing hemicellulose and lignin from 38.49% to 18.15% and 19.28% to 6.4%, respectively, on chemical treatment using 8% sodium hydroxide concentration for 20 minutes residence time. Scanning electron microscope (SEM) and Fourier transform infrared (FTIR) analysis also confirmed the results. The treated corncob also increased its crystallinity from 30.11% to 52.91%.
Aplikasi Mikrofibril Selulosa Dari Batang Sorgum Sebagai Pengisi Pada Sintesis Film Bioplastik Darni, Yuli; Lestari, Hilda; Lismeri, Lia; Utami, Herti; Azwar, Edwin
Jurnal Rekayasa Kimia & Lingkungan Vol 13, No 1 (2018): Jurnal Rekayasa Kimia & Lingkungan (June, 2018)
Publisher : Chemical Engineering Department, Syiah Kuala University, Banda Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23955/rkl.v13i1.8647

Abstract

Pada penelitian ini telah disintesis bioplastik dengan penambahan mikrokristalin selulosa dari batang sorgum sebagai pengisi. dengan formulasi pati sorgum-gelatin dan pemplastis gliserol. Formulasi pati sorgum-gelatin yang digunakan yaitu 10:0 ; 9,5:0,5 ; 8,5:1,5 ; 7,5:2,5 ; 6,5:3,5 dan 5,5:4,5 (gr/gr). Penambahan mikrokristalin selulosa sebesar 0 %, 1%, 2%, dan 3% dari total berat kering campuran pati dan gelatin. Suhu gelatinisasi yang digunakan pada 95oC dan konsentrasi gliserol 10% berat berdasarkan persen berat kering dari total berat campuran 10 gram pati dan gelatin. Kecepatan pengadukan sebesar 375 rpm dengan temperatur pengeringan yang digunakan adalah 60oC selama 11 jam. Ukuran granula pati yang digunakan yaitu lolos ayakan 60 mikron dan waktu pengadukan selama 35 menit. Mikrokristalin selulosa sebagai pengisi dihasilkan dengan metode alkali-mekanik dan berukuran 8 mikron. Penggunaan mikrokristalin selulosa dapat meningkatkan kuat tarik sebesar 3,65-10,47 MPa, dan menurunkan perpanjangan putus sebesar 2,14-14,32%.
Co-Authors Amalia, Faza Asmara, Panji Azhar Azhar Gunawan, Poernomo Herti Utami Krisanti, Aknasasia Virginia Lestari, Hilda Lismeri, Lia M. Haviz Muhammad Hanif Pebriyanti, Dita Salfitri, Selvy Sulha, Mutia Yuli Darni