Pengaruh Konsentrasi Asam Sulfat pada Sintesis Nanokristal Selulosa Bonggol Jagung (Zea mays)
Abdul Malik Nurdin, Program Studi Kimia, FMIPA Universitas Garut, Indonesia
Ai Fifih Luthfiyah, Program Studi Kimia, FMIPA Universitas Garut, Indonesia
Astri Senania, Program Studi Kimia, FMIPA Universitas Garut, Indonesia
Abstract
Ketersediaan jagung di Indonesia semakin meningkat jumlah produksinya tiap tahun. Masyarakat hanya memanfaatkan bagian biji dari jagung saja untuk kebutuhan konsumsi, sedangkan bagian lain dari jagung seperti daun dan bonggolnya hanya dimanfaatkan untuk pakan ternak atau sekedar menjadi limbah pertanian. Bonggol jagung memiliki kandungan selulosa yang dapat disintesis menjadi nanokristalin selulosa. Penelitian ini bertujuan untuk mengidentifikasi pengaruh asam sulfat pada sintesis nanokristal selulosa. Isolasi selulosa dari bonggol jagung dilakukan dengan dua tahap yaitu delignfikasi yang dengan menggunakan NaOH dan bleaching dengan NaOCl. Sintesis nanokristalin selulosa dilakukan dengan menggunakan metode hidrolisis asam sulfat dengan variasi konsentrasi pada suhu 45℃ selama 120 menit. Hasil sintesis didapat nilai kristalinitas dan ukuran kristal menggunakan analisis XRD dan identifikasi gugus fungsi dengan menggunakan FTIR. Hasil penelitian menunjukan asam sulfat dapat mempengaruhi hasil sintesis dengan teridentifikasi adanya gugus S=O pada permukaan karena adanya perekatan gugus dari H2SO4. Nilai kristalinitas tertinggi ditunjukan pada konsentrasi 60% sebesar 89.63% dengan ukuran kristal terkecil sebesar 0.88 nm pada konsentrasi 55%.
Keywords
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DOI: https://doi.org/10.21831/jps.v1i1.67993
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