Carbodiimide catalysis in cross-linking of cotton cellulose with 1,2,3,4-butanetetracarboxylic acid

1995 ◽  
Vol 55 (2) ◽  
pp. 375-382 ◽  
Author(s):  
Hyung-Min Choi ◽  
Tariq Mahmood ◽  
Jiang Dong Li ◽  
John Schlup
Keyword(s):  
Cotton Cellulose ◽  
Cross Linking ◽  
Butanetetracarboxylic Acid

scholarly journals 1,2,3,4-Butanetetracarboxylic Acid Cross-Linked Softwood Kraft Pulp Fibers for Use in Fluff Pulp Applications

2014 ◽  
Vol 9 (3) ◽  
pp. 155892501400900
Author(s):  
Kristoffer Lund ◽  
Harald Brelid
Keyword(s):  
Kraft Pulp ◽  
Cross Linking ◽  
Hydroxyl Groups ◽  
Pulp Fibers ◽  
Fiber Networks ◽  
Polycarboxylic Acids ◽  
Fiber Wall ◽  
Softwood Kraft Pulp ◽  
Cross Linker ◽  
Butanetetracarboxylic Acid

Cross-linked fluff pulp fibers for use in, for example, acquisition layers in absorption products can be found in the patent literature. Cross-linking improves properties such as the wet resilience of fluff pulp fiber networks. Among the more commonly seen cross-linkers are polycarboxylic acids, such as 1,2,3,4-butanetetracarboxylic acid (BTCA). These acids form ester bonds with the hydroxyl groups in the fiber wall. In this study, softwood kraft pulp fibers were cross-linked with BTCA. The swelling behavior of the fibers and properties related to acquisition in absorption products were studied. It was found that the water retention value (WRV) decreased as a consequence of the introduced cross-linker. After deprotonization of a large part of the introduced carboxylic acids, the WRV increased, but the cross-linker was still able to limit significant swelling of the fiber wall. The wet bulk under load of fiber networks, composed of cross-linked fibers, generally increased with a decrease in WRV. Furthermore, it was found that the property development obtained after a cross-linking reaction with BTCA may be predicted by introducing a relative reaction intensity, RIrel, that takes into account both time and temperature in the curing step. This shows that the time and temperature in the curing step are interchangeable.

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