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      Kopolimerisasi Cangkok Taut-Silang Selulosa Ampas Sagu sebagai Media Pemisahan Xantorizol

      Graft Crosslinked Copolymerization of Cellulose from Sago Waste as Separation Phase for Xanthorrhizol

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      Date
      2011
      Author
      Segara, Bayu
      Farid,Muhammad
      Irawadi,Tun Tedja
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      Abstract
      Sago waste (ela) is a lignocellulosic waste resulted from starch extraction of sago that is abundant and do not have economic value. Ela contains cellulose that potential to be modified using graft crosslinked copolymerization technique and to be applied as a stationary phase in column chromatography. Cellulose was isolated done in 2 stages, namely hydrolysis of starch using HCl 3% and delignification using H2O2 5% under pH 12. The isolate contained 56.42% α-cellulose, 36.62% hemicellulose, and 1.32% lignin. Copolymerization was carried out with acrylamide monomer and N,N’-methylenebisacrylamide crosslinker. The amount of crosslinker was varied from 0.1, 0.5, to 1 g and the ratio of cellulose isolate:acrylamide was 1:1. The result of Kjeldahl nitrogen analysis and Fourier transform infrared spectroscopy showed the success of copolymerization. The three copolymerized products (stationary phase) were able to separate xanthorrhizol of curcuma extract. The best stationary phase was copolymer with 0.5 g of crosslinker that can separate xanthorrhizol 2357 ppm with resolution of 1.467 and percent area of 34.08%.
       
      Ampas sagu (ela) merupakan limbah lignoselulosa yang dihasilkan dari ekstraksi pati sagu yang melimpah dan tidak bernilai ekonomi. Ela mengandung selulosa yang berpotensi untuk dimodifikasi dengan menggunakan teknik kopolimerisasi cangkok taut-silang dan diaplikasikan menjadi fase diam kromatografi kolom. Isolasi selulosa dilakukan dalam 2 tahap, yaitu hidrolisis pati dengan HCl 3% dan delignifikasi dengan H2O2 5% pH 12. Isolat yang dihasilkan mengandung 56.42% α-selulosa, 36.62% hemiselulosa, dan 1.32% lignin. Kopolimerisasi dilakukan dengan monomer akrilamida dan penaut-silang N,N’-metilenabisakrilamida. Jumlah penaut-silang diragamkan 0.1, 0.5, dan 1 g serta nisbah isolat selulosa:akrilamida adalah 1:1. Hasil analisis nitrogen Kjeldahl dan spektroskopi inframerah transformasi Fourier menunjukkan keberhasilan kopolimerisasi. Ketiga produk kopolimerisasi (fase diam) dapat memisahkan xantorizol dari ekstrak temu lawak. Fase diam terbaik adalah kopolimer dengan penaut-silang 0.5 g yang dapat memisahkan 2357 ppm xantorizol dengan resolusi 1.467 dan persen area 34.08%.
       
      URI
      http://repository.ipb.ac.id/handle/123456789/54158
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      • UT - Chemistry [1549]

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