Pengaruh Konsentrasi dan Variasi Zat Pemutih terhadap Preparasi Mikrokristal Selulosa dari Batang Ubi Kayu
DOI:
https://doi.org/10.33096/jcpe.v9i1.82Keywords:
Batang Ubi Kayu, Bleaching, Mikrokristal SelulosaAbstract
Berdasarkan data Badan Pusat Statistik (BPS) tahun 2018 produksi ubi kayu di Provinsi Lampung sebanyak 6.683.758 ton. Dari tinggi batang ubi kayu, hanya 10% yang dimanfaatkan untuk di tanam kembali. Batang ubi kayu mempunyai kandungan selulosa sebesar 39,17% sehingga berpotensi menjadi sumber selulosa yang dapat dimanfaatkan untuk menghasilkan mikrokristal selulosa sehingga meningkatkan nilai tambah pemanfaatan batang ubi kayu dan diharapkan dapat mengurangi jumlah limbah pertanian. Proses pembuatan mikrokristal selulosa meliputi isolasi α-selulosa (delignifikasi dan bleaching) dan perlakuan hidrolisis asam. Tujuan dari penelitian ini adalah untuk mengetahui perubahan konsentrasi NaOCl dan H2O2 selama reduksi kadar lignin pada alfa-selulosa batang ubi kayu serta mengetahui karakteristik mikrokristal selulosa batang ubi kayu, meliputi indeks kristalinitas dan ukuran partikel. Hasil penelitian menunjukkan bahwa perlakuan bleaching dengan pemutih NaOCl 4% v/v merupakan preparasi mikrokristal terbaik. Variasi mikrokristal selulosa ini memiliki kandungan selulosa hingga 78%, kristalinitas 80% dan volume partikel < 25% sebesar 26,30 µm. Oleh karena itu, peningkatan konsentrasi pemutih dapat meningkatkan kristalinitas dan memperkecil ukuran partikel mikrokristalin selulosa
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