scholarly journals Locating the Reaction Site of 1,2,3,4-Butanetetracarboxylic Acid Carboxyl and Cellulose Hydroxyl in the Esterification Cross-Linking

ACS Omega ◽  
2021 ◽  
Author(s):  
Bolin Ji ◽  
Xiaowen Wang ◽  
Shoujia Gong ◽  
Weibing Zhong ◽  
Ruyi Xie
Keyword(s):  
Cross Linking ◽  
Reaction Site ◽  
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.

Non-phosphorus catalysts for the ester cross-linking of cellulose with 1,2,3,4-butanetetracarboxylic acid

2017 ◽  
Vol 18 (4) ◽  
pp. 682-688 ◽  
Author(s):  
Xinhai Zhang ◽  
Bolin Ji ◽  
Kelu Yan ◽  
Tingli Hu
Keyword(s):  
Cross Linking ◽  
Butanetetracarboxylic Acid

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

Wrinkle recovery angle enhancement and tensile strength loss of 1,2,3,4-butanetetracarboxylic acid finished lyocell fabrics

2020 ◽  
Vol 90 (17-18) ◽  
pp. 2097-2108
Author(s):  
Guizhen Ke ◽  
Zhiheng Xiao ◽  
Xinya Jin ◽  
Lixiang Yu ◽  
Jianqiang Li ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Breaking Strength ◽  
Strength Loss ◽  
Curing Temperature ◽  
Cross Linking ◽  
Regression Equations ◽  
Acid Degradation ◽  
Recovery Angle ◽  
Butanetetracarboxylic Acid ◽  
Strength Retention

The formaldehyde-free crease-proof finishing agent 1,2,3,4,-butanetetracarboxylic acid (BTCA) was used to treat lyocell fabrics. The effects of BTCA concentration and curing temperature on the wrinkle recovery angle (WRA) and tensile breaking strength of lyocell fabrics were discussed. The results showed that with the increase of BTCA concentration and curing temperature, the WRA value of lyocell fabrics increased obviously and the maximum WRA reached 147°, but breaking strength decreased gradually and the minimum strength retention was 68%. The WRA was durable against laundering. The fabric whiteness difference was not obvious and the whiteness retention of all samples exceeded 98%. After further alkali treatment, the WRA of the treated lyocell fabrics decreased and the fracture strength retention recovered to varying degrees (0.45–10.8%). The developed regression equations were found to be in good correlation ( r2 > 92%) with the selected variables (tensile strength, BTCA concentration, curing temperature). Fourier transform infrared spectroscopy analysis confirmed that the tensile strength loss of BTCA-treated lyocell fabrics was caused by cross-linking of cellulose molecules and acid degradation. Tensile strength loss that resulted from ester bonding could be restored after hydrolysis in alkaline solution. The recoverable magnitude of tensile strength was related to the curing temperature. A high temperature not only promoted the cross-linking of cellulose macromolecules, but also accelerated the acid degradation of cellulose.

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