一种具有自蒙囿作用的水滑石纳米无铬鞣剂及其制备方法和应用
By preparing oxidized polysaccharide-coated hydrotalcite nano-chromium-free tanning agents, the problem of poor dispersibility of hydrotalcite in leather is solved, achieving uniform tanning and improved wet heat resistance of leather, avoiding chromium pollution, and having both environmental and economic benefits.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SHAANXI UNIV OF SCI & TECH
- Filing Date
- 2024-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
Existing hydrotalcites (LDHs) have poor dispersibility in leather collagen, resulting in decreased leather uniformity and difficulty in penetrating into the collagen fibers, thus affecting the quality of the finished leather.
A hydrotalcite nano-chromium-free tanning agent was prepared by mixing an oxidized polysaccharide solution with a mixture of magnesium, aluminum, and metal A nitrates. A special structure of oxidized polysaccharide-coated LDHs was constructed by oxidation reaction and pH control, which slowed down the binding rate with the skin surface, improved dispersibility, and generated covalent cross-linking between the functional groups in the oxidized polysaccharide solution and the skin collagen side chains.
This method achieves uniform dispersion of hydrotalcite nano-chromium-free tanning agents in leather, improves the wet heat resistance and sensory properties of the finished leather, and solves the chromium pollution problem, resulting in significant environmental and economic benefits.
Smart Images
Figure CN118389754B_ABST