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  • Weni Fika
    Universitas Andalas
  • Anwar Kasim
    Universitas Andalas
  • Novelina Novelina
    Universitas Andalas
  • Athanasia Amanda Septevani
    Pusat Penelitian Kimia-LIPI, Serpong

Abstract

This study aimed to synthesize a superabsorbent polymer composite based on a natural polymer that has been made by grafting method using cassava starch as a backbone (main framework), Acrylic acid (AA) as a monomer, Ammonium persulfate (APS) as an initiator and N,N Methylene bisacrylamide (MBA) as a crosslinker. The effect of the ratio of cassava starch and acrylic acid (25 : 75; 50 : 50 and 75 : 25% weight total) has been studied based on absorption capacity. The chemical structure that occurs is analyzed using Fourier Transform Infra-red (FTIR) spectroscopy. The results of the FTIR spectrum showed that the grafting of acrylic acid to starch occurred. In the ratio of starch to acrylic acid 25 : 75% of the weight total obtained the maximum water absorption ability (absorption capacity) 224 g/g in aquades and 25 g/g in 0,9% NaCl solution.


Tujuan dari penelitian ini adalah untuk mensintesis komposit polimer superabsorban berbasis polimer alam yang telah dibuat dengan metode grafting (pencangkokan) yang menggunakan pati singkong sebagai backbone (kerangka utama), asam akrilat (AA) sebagai monomer, Ammonium persulfat (APS) sebagai inisiator dan N,N Metilen bisakrilamida (MBA) sebagai crosslinker. Pengaruh rasio pati singkong dan asam akrilat (25 : 75; 50 : 50 dan 75 : 25% berat total) telah dipelajari berdasarkan kapasitas absorbsi. Struktur kimia yang terjadi dianalisa menggunakan spektroskopi Fourier Transform Infra-red (FTIR). Hasil dari spektrum FTIR memperlihatkan bahwa terjadinya grafting asam akrilat terhadap pati. Pada rasio pati dengan asam akrilat 25 : 75% berat total diperoleh kemampuan menyerap air (kapasitas absorbsi) maksimum 224 g/g dalam aquades dan 25 g/g dalam larutan NaCl 0,9%.

Keywords

absorption capacity, acrylic acid, asam akrilat, cassava starch, grafting, kapasitas absorbsi, komposit polimer superabsorban, pati singkong, superabsorbent polymer composites

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How to Cite
FIKA, Weni et al. RASIO PATI SINGKONG DAN ASAM AKRILAT TERHADAP KAPASITAS ABSORBSI PADA SINTESIS KOMPOSIT POLIMER SUPERABSORBAN. Jurnal Matematika Sains dan Teknologi, [S.l.], v. 20, n. 2, p. 29-37, sep. 2019. ISSN 2442-9147. Available at: <http://jurnal.ut.ac.id/index.php/JMST/article/view/963>. Date accessed: 16 oct. 2019. doi: https://doi.org/10.33830/jmst.v20i2.963.2019.
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