Poster
Abstract
Research summary supplied by the authors
This work is based on the application development of biopolymers derived from modified starches, as per the study "Ecological tanning based on modified carbohydrates" presented at the III IULTCS EuroCongress Vicenza 2022, taking into consideration the tanning applied on hides deriving from liming processes of a different nature: - traditional reductive liming with the use of sodium hydrosulphide and sodium sulphide - reductive liming with the aid of thio-derivatives without the use of sodium hydrosulphide and sodium sulphide - reductive liming as per the project "Odorless reductive liming, without thiols, thioglycolates and sodium sulphide” - oxidative liming In the previous study, all the application tests were carried out on hides derived from reductive liming based on thio -derivatives in the complete absence of hydrosulphides and sulphides, noting a good distribution and penetration of the tanning agent which improved performance when comb ined with various capping agents which included both organic substances (glutaraldehyde, oxazolidine and synthetic tannins) and inorganic substances (zeolites, silicates and non-metal free tanning agents). This work, on the other hand, will present the dev elopments carried out on hides from different types of liming with the aid of new capping agents and different manufacturing procedures and will also be linked to the work "Odorless reductive liming, without thiols, thioglycolates and sodium sulphide", developed partly for starch tanning to improve the final quality of the leather.