Peningkatan kemurnian selulosa dan karboksimetil selulosa (CMC) hasil konversi limbah TKKS melalui perlakuan NaOH 12%
DOI:
https://doi.org/10.22302/iribb.jur.mp.v87i2.339Keywords:
FTIR, jamur tiram putih, limbah baglog, TKKS, XRDAbstract
Abstract
Carboxymethyl cellulose (CMC) is a versatile additive whose needs are fulfilled by imports. This becomes an opportunity to develop local CMC products. CMC can be synthesized from the cellulose of oil palm empty fruit bunches (OPEFB). The use of OPEFB as a mixed ingredient of oyster mushroom growing media (baglog) could help the delignification process of OPEFB. Cellulose purified from baglog OPEFB waste using NaOH 10% treatment only produced α-cellulose 80.2% which then being converted to CMC with the purity of 73.4%. Low purity of this CMC did not meet the standard for food-grade which requires purity above 99.5%. This study aimed to improve the purity of cellulose from baglog OPEFB waste by using NaOH 12% treatment. In this way, the purity of the resulting CMC would be expected higher. The resulting CMC product was observed using SEM, FTIR and XRD. The result showed that α-cellulose obtained increased to 84.54% by using 12% NaOH treatment. The resulting CMC had a higher purity level (95.24%). Efforts to increase the degree of substitution and viscosity are still needed to achieve specifications that meet the quality standards of SNI. FTIR and XRD results showed that the characteristics of CMC produced from baglog OPEFB waste were close to commercial CMC as indicated by their functional groups and degree of crystallinity.
[Keywords: FTIR, white oyster mushroom, baglog waste, OPEFB, XRD]
Abstrak
Karboksimetil selulosa(CMC) merupakan zat aditif serbaguna yang kebutuhannyamasihdipenuhi melalui impor. Hal ini menjadi peluang untuk mengembangkan produk CMC lokal.CMC dapat disintesis dari selulosa tandan kosong kelapa sawit (TKKS). Penggunaan TKKS sebagai campuran media pertumbuhan (baglog) jamur tiram putih dapat membantu proses delignifikasi TKKS. Selulosa yang dimurnikan dari limbah TKKS baglog menggunakan perlakuan NaOH 10% hanya menghasilkan α-selulosa sebanyak 80,2%, yang kemudian dikonversi menjadi CMC dengan kemurnian 73,4%. Tingkat kemurnian yang tergolong rendah tersebut tidak memenuhi mutu CMC untuk pangan yang mensyaratkan tingkat kemurnian diatas 99,5%.Penelitian ini bertujuan untuk meningkatkan kemurnian selulosa dari limbah TKKS baglog melalui perlakuan menggunakan NaOH 12%. Dengan cara ini, kemurnian CMC yang dihasilkan diharapkan lebih tinggi. Produk CMC yang dihasilkan diamati menggunakan SEM, FTIR dan XRD. Hasil penelitian menunjukkan bahwa α-selulosa yang diperoleh meningkat menjadi 84,54% pada ekstraksi menggunakan NaOH 12%. CMC yang dihasilkan memiliki tingkat kemurnian yanglebihtinggi, yaitu:95,24%. Upaya untuk meningkatkannilai derajat substitusidan viskositas masih diperlukan untuk mencapai spesifikasi yang memenuhi mutu standar SNI. Hasil FTIR dan XRD menunjukkan bahwa karakteristik CMC yang dihasilkan dari limbah TKKS baglog sudah mendekati CMC komersial ditinjau dari gugus fungsi dan derajat kristalinitasnya.
[Kata kunci: FTIR, jamur tiram putih, limbah baglog, TKKS, XRD]
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