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Titolo:
Immobilized lipase on porous silica beads: preparation and application forenzymatic ring-opening polymerization of cyclic phosphate
Autore:
He, F; Zhuo, RX; Liu, LJ; Jin, DB; Feng, J; Wang, XL;
Indirizzi:
Wuhan Univ, Minist Educ China, Lab Biomed Polymer Mat, Dept Chem, Wuhan 430072, Peoples R China Wuhan Univ Wuhan Peoples R China 430072 m, Wuhan 430072, Peoples R China
Titolo Testata:
REACTIVE & FUNCTIONAL POLYMERS
fascicolo: 2, volume: 47, anno: 2001,
pagine: 153 - 158
SICI:
1381-5148(200103)47:2<153:ILOPSB>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
THERMAL-ACTIVATION;
Keywords:
porcine pancreas lipase; immobilization; enzymatic ring-opening polymerization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
19
Recensione:
Indirizzi per estratti:
Indirizzo: Zhuo, RX Wuhan Univ, Minist Educ China, Lab Biomed Polymer Mat, Dept Chem,Wuhan 430072, Peoples R China Wuhan Univ Wuhan Peoples R China 430072 430072, Peoples R China
Citazione:
F. He et al., "Immobilized lipase on porous silica beads: preparation and application forenzymatic ring-opening polymerization of cyclic phosphate", REACT FUNCT, 47(2), 2001, pp. 153-158

Abstract

Porcine pancreas lipase (PPL) immobilized on porous silica beads and employed successfully for ring-opening polymerization of ethylene isobutyl phosphate (EIBP) was investigated. The factors affecting the activity of the immobilized lipase were studied. A good coupling yield was achieved - 41.88 mgof native lipase/g of porous silica beads. We also studied the thermal properties of this immobilized lipase. The optimum temperature of this immobilized lipase was 70 degreesC. After incubation at 90 degreesC for 1 h, the activity of immobilized lipase remained above 70%. An enzyme-catalyzed ring-opening polymerization was achieved in bulk with Mn values ranging from 1642 to 5783 g/mol. It was found that recovered immobilized lipase was more active for the polymerization of EIBP than in the first use and Mn was significantly increased. The higher molecular weight can be gained with the propriety amount of immobilized lipase and a higher temperature. (C) 2001 published by Elsevier Science B.V.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 01:45:53