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Melamine-Based Polymeric Crosslinker for Cleaner Leather Production.

Srinivasan Pradeep1,2, Murali Sathish3, Kalarical Janardhanan Sreeram4

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This study introduces a formaldehyde-free chromium-incorporated polymeric tanning agent (FF-CIPTA) for sustainable leather processing. The new method significantly reduces chromium input and waste, improving leather quality and economic value.

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Area of Science:

  • Sustainable Chemistry
  • Materials Science
  • Textile and Leather Technology

Background:

  • Leather processing faces challenges in reducing chrome input and managing waste.
  • Developing eco-friendly tanning agents is crucial for sustainable leather production.

Purpose of the Study:

  • To synthesize and apply a novel formaldehyde-free chromium-incorporated polymeric tanning agent (FF-CIPTA).
  • To establish a reformed leather processing route minimizing chromium waste and chemical usage.

Main Methods:

  • Synthesis and characterization of FF-CIPTA.
  • Application of FF-CIPTA in a reformed leather processing route.
  • Evaluation of leather properties and environmental impact using techniques like SEM and porosity analysis.

Main Results:

  • FF-CIPTA exhibits stability up to pH 5.2 with 12% Cr2O3 content.
  • Achieved near-zero chromium-containing solid waste, 71.4% reduction in chromium input, and 92% chromium transfer efficiency.
  • Reduced water consumption by 51.6%, chemical input by 17%, and total dissolved solids by 74.4%.

Conclusions:

  • The developed FF-CIPTA and processing route offer a sustainable and economically viable alternative for leather tanning.
  • Significant improvements in leather quality, environmental performance, and cost-effectiveness were demonstrated.