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      Karakteristik Lignin Phosphorus dari Lindi Hitam Kayu Eukaliptus.

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      Date
      2024
      Author
      Kayla, Dewi Shafa
      Nawawi, Deded Sarip
      Fatriasari, Widya
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      Abstract
      Fosforilasi lignin merupakan metode modifikasi kimia yang telah diketahui untuk meningkatkan peforma lignin sebagai aditif tahan api. Lignin hasil isolasi dari Eucalyptus sp disintesis dengan P2O5 menjadi lignin terfosforilasi. Lignin hasil isolasi tidak larut dalam air, sehingga dimodifikasi melalui sulfonasi menjadi lignosulfonat, kemudian disintesis dengan POCl3 menjadi lignosulfonat terfosforilasi. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan phosphorus terhadap karakteristik lignin Eucalyptus termodifikasi dan terfosforilasi. Pengujiannya meliputi rendemen, kemurnian, gugus fungsi, morfologi, dan analisis termal. Hasil penelitian menunjukkan bahwa lignin terfosforilasi memiliki rendemen dan kemurnian lebih tinggi dibandingkan dengan lignosulfonat terfosforilasi. Gugus fungsi lignin terfosforilasi menunjukkan adanya gugus fungsi penciri lignin, sedangkan lignosulfonat terfosforilasi menunjukkan adanya tambahan gugus fungsi ikatan S=O. Lignin terfosforilasi dan lignosulfonat terfosforilasi memiliki morfologi fisik yang tidak jauh berbeda dan masih memiliki komponen mineral. Sifat termal dari lignin terfosforilasi menghasilkan residu pembakaran dan suhu Tg lebih tinggi dibandingkan dengan lignosulfonat terfosforilasi.
       
      The phosphorylation of lignin is well known as a chemical modification method to improve its fire behaviour as a fire-retardant agent. The isolated lignin of Eucalyptus sp was synthesized with P2O5 into phosphorylated lignin. The isolated lignin was insoluble in water, thus it modified through sulfonation into lignosulfonate, then synthesized with POCl3 into phosphorylated lignosulfonate. This study aimed to analyze the effect of phosphorous addition on the characteristics of modified and phosphorylated Eucalyptus lignin. The characterization includes yield, purity, functional group analysis, morphological analysis, and thermal analysis. The results showed that phosphorylated lignin had higher yield and purity compared to phosphorylated lignosulfonate. The functional groups of phosphorylated lignin showed the presence of lignin characteristic functional groups, while phosphorylated lignosulfonate showed the presence of S=O bond functional groups. Phosphorylated lignin and phosphorylated lignosulfonate have similar physical morphology and still have mineral components. Thermal properties of phosphorylated lignin produced combustion residue and higher Tg temperature than phosphorylated lignosulfonate.
       
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      http://repository.ipb.ac.id/handle/123456789/154258
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      Copyright © 2020 Library of IPB University
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      Indonesia DSpace Group 
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