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Hydrogels of starch-g-(tert-butylacrylate) and starch-g-(n-butylacrylate) copolymers

Synthesis and formation

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Abstract

The synthesis, characterization, and hydrogel properties of starch-g-(tert-butylacrylate) and starch-g-(n-butylacrylate) copolymers were studied. The optimum conditions for the grafting process of tert-butylacrylate into 1.0 g of starch were as follows: [tert-butylacrylate] = 0.04 mol/L, [CAN] = 9.0 × 10−4 mol/L, temperature = 20 °C in 100 mL solution, whereas the results using n-butylacrylate monomer were as follows: [n-butylacrylate] = 0.04 mol/L, [CAN] = 4.0 × 10−3 mol/L, temperature = 30 °C in 100 mL solution. The grafting evidences of monomers into starch were done through TG and its derivative DTG for thermal changes and mass losses, scanning electron microscope (SEM) for morphological changes, powder X-ray for crystallinity measurements and FTIR for functional group changes. Acid hydrolysis method was used efficiently to allow the calculations of the viscosity average molecular weight (M v) of the grafted chains on starch and consequently the real percent of grafting efficiency (i.e. %GY). The capability of starch-g-(n-BAC) hydrogel to absorb water were found 10 times more than starch-g-(tert-BAC) hydrogel, which were clarified through the X-ray and SEM results.

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Authors and Affiliations

  1. Department of Applied Chemistry, Jordan University of Science & Technology, P.O. Box 3030, 22110, Irbid, Jordan

    Mohammad M. Fares & Adeeb S. El-faqeeh

  2. Department of Applied Physics, Jordan University of Science & Technology, P.O. Box 3030, 22110, Irbid, Jordan

    Hasan Ghanem

  3. Department of Chemistry, Sudan University of Science & Technology, P.O. Box 857, Khartoum, Sudan

    Mohammad E. Osman & Elfatih A. Hassan

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  1. Mohammad M. Fares
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  2. Adeeb S. El-faqeeh
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  3. Hasan Ghanem
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  4. Mohammad E. Osman
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Correspondence to Mohammad M. Fares.

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Fares, M.M., El-faqeeh, A.S., Ghanem, H. et al. Hydrogels of starch-g-(tert-butylacrylate) and starch-g-(n-butylacrylate) copolymers. J Therm Anal Calorim 99, 659–666 (2010). https://doi.org/10.1007/s10973-009-0213-2

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  • DOI: https://doi.org/10.1007/s10973-009-0213-2

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