The influence of lignin and xylan on some kraftliner pulp properties

• This study investigates the influence of lignin and hemicellulose content on the mechanical and physical properties of softwood kraft liner pulp. Tensile properties, hygroexpansion, and mechano-sorptive creep properties were measured. The lignin and hemicellulose contents were modified by chlorite delignification and xylanase treatment. After treatment, the chemical composition of the pulps was 3-14% Klason lignin, 69-77% cellulose, 16-21% hemicellulose, and 4-7% xylan. In the tested pulps, low lignin content tended to decrease hygroexpansion as well as increase tensile stiffness and mechano-sorptive creep stiffness. Xylan contributed less to the pulp sheet properties, but at equal lignin contents, higher xylan content tended to give increased hygroexpansion and worse mechano-sorptive creep properties.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Pappers-, massa- och fiberteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Paper, Pulp and Fiber Technology (hsv//eng)

Nyckelord

Xylan; Lignin; Tensile stiffness; Hygroexpansion; Mechano-sorptive creep; Kraftliner pulp; Softwood; EDGEWISE COMPRESSION CREEP; ELASTIC-MODULUS; MECHANOSORPTIVE CREEP; ALDITOL ACETATES; FIBERS; PAPER; STRENGTH; COOKING

Cellulose and paper engineering

Cellulosa- och pappersteknik

Publikations- och innehållstyp

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