Green Chemistry
09 Feb 2021
On the development of chrome-free tanning agents: an advanced Trojan horse strategy using ‘Al–Zr-oligosaccharides’ produced by the depolymerization and oxidation of biomass
Zhicheng Jiang,ab Mi Gao,ab Javier Remón,*c Wei Ding,d Changwei Hu*e and Bi Shi*ab
a Department of Biomass Science and Engineering, Sichuan University, Chengdu, P. R. China
b National Engineering Research Center of Clean Technology in Leather Industry, Sichuan University, Chengdu, P. R. China
c Instituto de Carboquímica, CSIC, Zaragoza, Spain
d China Leather and Footwear Research Institute Co. Ltd, Beijing, P. R. China
e Key Laboratory of Green Chemistry and Technology, Ministry of Education, Sichuan University, Chengdu, P. R. China
10.1039/D0GC04155F
This work addresses the manufacturing of a pioneering chrome-free tanning agent, consisting of ‘Al–Zr-oligosaccharides’ produced from biomass. First, a microwave-assisted AlCl3–H2O2–H2O reaction system was used for the simultaneous degradation and oxidation of hemicellulose in corncob. The obtained aqueous solution containing ‘Al-oligosaccharides’ was then combined with Zr to produce water-soluble ‘Al–Zr-oligosaccharides’. These species behaved as a ‘Trojan horse’, allowing the uniform and controlled penetration of Al and Zr into the leather, avoiding their accumulation on the surface.
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