Laccase-catalysed functionalisation of chitosan by ferulic acid and ethyl ferulate: evaluation of physicochemical and biofunctional properties.
Chitosan and its derivatives functionalized by laccase-catalyzed oxidation of ferulic acid (FA) and ethyl ferulate (EF) were characterised for their physico-chemical, antioxidant and antibacterial properties. The enzymatic grafting of oxidised phenols led to FA-coloured and EF-colourless chitosan derivatives with good stability of colour and grafted phenols towards the chemical treatment by organic solvents. The efficiency of FA-products grafting onto chitosan was higher than that of EF-products. Moreover, the enzymatic grafting of phenols onto chitosan changed its morphological surface, increased its molecular weight and its viscosity. Furthermore, the chitosan derivatives presented improved antioxidant properties especially for FA-chitosan derivative when compared with chitosan with good antioxidant stability towards thermal treatment (100°C/1h). Chitosan and its derivatives showed also similar antibacterial activities and more precisely bactericidal activities. This enzymatic procedure provided chitosan derivatives with improved properties such as antioxidant activity, thermal antioxidant stability as well as the preservation of initial antibacterial activity of chitosan.
Lorraine University, Laboratory of Biomolecules Engineering (LIBio), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France.
Abdulhadi
A
Aljawish
Lorraine University, Laboratory of Reactions and Process Engineering (LRGP-UMR 7274), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France.
Isabelle
I
Chevalot
Lorraine University, Laboratory of Biomolecules Engineering (LIBio), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France.
Jordane
J
Jasniewski
Lorraine University, Laboratory of Biomolecules Engineering (LIBio), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France.
Anne-Marie
AM
Revol-Junelles
Lorraine University, Laboratory of Biomolecules Engineering (LIBio), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France.
Joël
J
Scher
Lorraine University, Laboratory of Biomolecules Engineering (LIBio), 2 avenue de la Forêt de Haye, TSA40602, F-54518 Vandœuvre-lès-Nancy, France. Electronic address: lionel.muniglia@univ-lorraine.fr.
Lionel
L
Muniglia
D000900:Anti-Bacterial Agents; D000975:Antioxidants / Q000737:chemistry*; D002109:Caffeic Acids / Q000737:chemistry*; D002384:Catalysis; D055598:Chemical Phenomena; D048271:Chitosan / Q000737:chemistry*; D003373:Coumaric Acids / Q000737:chemistry*; D042845:Laccase / Q000737:chemistry*
D000900:Anti-Bacterial Agents; D000975:Antioxidants; D002109:Caffeic Acids; D003373:Coumaric Acids; C099085:ethyl ferulate; D048271:Chitosan; C004999:ferulic acid; D042845:Laccase
Biofunctional properties; Chitosan; Laccase; Phenolic compounds; Physicochemical properties