Microwave enhanced synthesis of chitosan-graft-polyacrylamide molecularly imprinted polymer (MIP) for selective extraction of antioxidants

Saifuddin M. Nomanbhay, A. A.Nur Yasumira

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Polymers have been molecularly imprinted for the purpose of binding specifically to α-tocotrienol (vitamin E). A molecularly imprinted polymer (MIP) material was prepared using α-tocotrienol as the imprinted molecule, acrylamide as functional monomer and macroporous chitosan beads as functional matrix. Chitosan-graft-polyacrylamide was synthesized without any radical initiator or catalyst using microwave (MW) irradiation. The representative microwave synthesized graft copolymer was characterized by fourier transform-infrared spectroscopy, taking chitosan as a reference. Microwave irradiation was exploited for polyacrylamide grafting on the cross-linked chitosan beads to produce MIP, where both time as well as chemicals can be saved. It can be assumed that the chitosan coated polyacrylamide MIP will have better pH stability and enhanced adsorption capacity. The maximum adsorption capacity was observed to be 3.95 mg/g of MIP, which gave removal efficiency of 93%. After 4 h, the change of adsorption capacities for α-tocotrienol did not show notable effects. The Langmuir and Freundlich adsorption models were also applied to describe the equilibrium isotherms.

Original languageEnglish
Pages (from-to)1362-1374
Number of pages13
JournalE-Journal of Chemistry
Volume7
Issue number4
DOIs
Publication statusPublished - 01 Jan 2010

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Chitosan
Grafts
Tocotrienols
Polymers
Antioxidants
Microwaves
Adsorption
Microwave irradiation
Acrylamide
Graft copolymers
Vitamin E
Isotherms
Monomers
polyacrylamide
Catalysts
Molecules

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

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title = "Microwave enhanced synthesis of chitosan-graft-polyacrylamide molecularly imprinted polymer (MIP) for selective extraction of antioxidants",
abstract = "Polymers have been molecularly imprinted for the purpose of binding specifically to α-tocotrienol (vitamin E). A molecularly imprinted polymer (MIP) material was prepared using α-tocotrienol as the imprinted molecule, acrylamide as functional monomer and macroporous chitosan beads as functional matrix. Chitosan-graft-polyacrylamide was synthesized without any radical initiator or catalyst using microwave (MW) irradiation. The representative microwave synthesized graft copolymer was characterized by fourier transform-infrared spectroscopy, taking chitosan as a reference. Microwave irradiation was exploited for polyacrylamide grafting on the cross-linked chitosan beads to produce MIP, where both time as well as chemicals can be saved. It can be assumed that the chitosan coated polyacrylamide MIP will have better pH stability and enhanced adsorption capacity. The maximum adsorption capacity was observed to be 3.95 mg/g of MIP, which gave removal efficiency of 93{\%}. After 4 h, the change of adsorption capacities for α-tocotrienol did not show notable effects. The Langmuir and Freundlich adsorption models were also applied to describe the equilibrium isotherms.",
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Microwave enhanced synthesis of chitosan-graft-polyacrylamide molecularly imprinted polymer (MIP) for selective extraction of antioxidants. / M. Nomanbhay, Saifuddin; Yasumira, A. A.Nur.

In: E-Journal of Chemistry, Vol. 7, No. 4, 01.01.2010, p. 1362-1374.

Research output: Contribution to journalArticle

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