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Swelling and Hydrolysis Kinetics of Kraft Pulp Fibers in Aqueous 1-butyl-3-methylimidazolium Hydrogen Sulfate Solutions

Swelling and Hydrolysis Kinetics of Kraft Pulp Fibers in Aqueous 1-butyl-3-methylimidazolium Hydrogen Sulfate Solutions

Jia Mao, Hatem Abushammala, Laura Barcellos Pereira, Marie-Pierre Laborie

Carbohydr Polym. 2016 Nov 20;153:284-291.

PMID: 27561498

Abstract:

1Butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO4) is efficient at extracting cellulose nanocrystals from pulp fibers. To shed some light on the respective contributions of swelling and hydrolysis of pulp fibers by [Bmim]HSO4, the physical, structural and morphological characteristics of hardwood Kraft pulp fibers were monitored under various conditions of temperature, water content and time. Swelling was largely compounded by hydrolysis at the highest temperatures (120°C) as evidenced by mass loss and reduced degree of polymerization (DPn) at this temperature. At 120°C only, water content appeared to play a significant role on the extent of hydrolysis. At this temperature, a heterogeneous kinetic model involving weak links and amorphous regions best described the experimental data. Hydrolysis rates were maximum at 25% water content in the aqueous ionic liquid.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP262297132	1-Butyl-3-methylimidazolium hydrogen sulfate		262297-13-2	Price

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