Phosphorylation of Kraft fibers with phosphate esters.
Phosphate esters, derived from two different long-chain aliphatic alcohols, were used as phosphorylating reagents for Kraft pulp fibers. High phosphorus contents and almost non-degraded fibers were obtained by following this pathway. The phosphorylation efficiency was influenced by the alkyl chain length of PEs since the phosphorus content in modified fibers was higher for the shorter chain reagent. Due to the heterogeneous reaction environment, the amount of grafted phosphorus was found to be almost three times higher at the surface than in the bulk of the fibers. Analyses also indicated that the phosphorus was bonded to fibers as a phosphate-like structure. Furthermore, the situation seemed to be different for the fiber surface where significant amounts of phosphorus were present in more complex structures like pyrophosphate or even oligo-phosphate.
Lignocellulosic Materials Research Center (CRML), Université du Québec à Trois-Rivières, P.O. Box 500, Trois-Rivières, QC G9A 5H7 Canada.
Ying
Y
Shi
Lignocellulosic Materials Research Center (CRML), Université du Québec à Trois-Rivières, P.O. Box 500, Trois-Rivières, QC G9A 5H7 Canada.
Dan
D
Belosinschi
Lignocellulosic Materials Research Center (CRML), Université du Québec à Trois-Rivières, P.O. Box 500, Trois-Rivières, QC G9A 5H7 Canada.
François
F
Brouillette
Bioorganic and Macromolecular Chemistry Laboratory (LCBM), Université Caddi Ayyad, Faculté des Sciences et Techniques, Av. Abdelkarim Elkhattabi, B.P 549 Marrakech, Morocco.
Ahmed
A
Belfkira
Lignocellulosic Materials Research Center (CRML), Université du Québec à Trois-Rivières, P.O. Box 500, Trois-Rivières, QC G9A 5H7 Canada.
Bruno
B
Chabot
D002482:Cellulose / Q000737:chemistry*; D032561:Cotton Fiber; D004952:Esters / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D010710:Phosphates / Q000737:chemistry*; D010766:Phosphorylation; D013499:Surface Properties
D004952:Esters; D010710:Phosphates; D002482:Cellulose
Kraft fibers; Phosphate esters; Phosphorus content; Phosphorylation; Urea