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Immobilization of candida rugosa lipase on aminated polyvinyl benzyl chloride-grafted nylon-6 microfibers

Abd Halin, Nur Iilani and Alkhatib, Ma'an Fahmi Rashid and Mohd. Salleh, Hamzah and Nasef, Mohamed Mahmoud (2019) Immobilization of candida rugosa lipase on aminated polyvinyl benzyl chloride-grafted nylon-6 microfibers. Bulletin of Chemical Reaction Engineering & Catalysis, 14 (2). pp. 369-379. ISSN 1978-2993

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Abstract

This paper demonstrates a simplified procedure for the preparation of a nylon-6 microfibers based support for the immobilization of Candida rugosa lipase via covalent attachment to enhance the stability and reusability of lipase. The preparation of the support was done by radiation induced graft copolymerization (RIGC) of vinyl benzyl chloride (VBC) onto nylon-6 microfibers followed by amination with ethanolamine to facilitate the immobilization of lipase. Fourier transfer infra red (FTIR) and scanning electron microscope (SEM) were used to study the chemical and physical changes following grafting, amination and immobilization. Response surface methodology (RSM) was applied for the optimization of lipase immobilization on the aminated microfibers. The optimization parameters were incubation time, pH, and lipase concentration. Moreover, this study investigated the effect of temperature, pH, and storage stability and reusability on the lipase in its immobilized and free forms. The developed model from RSM showed an R2 value of 0.9823 and P-value < 0.001 indicating that the model is significant. The optimum temperatures for both immobilized and free lipases were 45 °C, whereas the best pH values for lipase activity were at pH 8 and pH 7, respectively. This study also identifies values for KM and Vmax for both immobilized and free lipase accordingly. Based on the results, immobilized lipase had significantly improved the stability and reusability of lipase compared to that in free forms.

Item Type: Article (Journal)
Additional Information: 5595/72703
Uncontrolled Keywords: Lipase immobilization; PVBC-grafted nylon-6 microfiber; amination; response surface methodology; optimization; enzyme activity
Subjects: T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes: Kulliyyah of Engineering
Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User: Dr. Ma'an Alkhatib
Date Deposited: 18 Jun 2019 15:33
Last Modified: 31 Jul 2019 12:10
URI: http://irep.iium.edu.my/id/eprint/72703

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