A Novel Approach for Wet-White Leather Manufacture Based on Tannic Acid-Laponite Nanoclay Combination Tannage

作者：Shi Jiabo; Ren Keshuai; Wang Chunhua; Wang Jie; Lin Wei^*

来源：Journal of the Society of Leather Technologists and Chemists, 2016, 100(1): 25-30.

• LIGHT-SCATTERING
• NANOCOMPOSITES
• SYSTEM
• COLLAGEN
• GELATIN

A novel wet-white tanning approach based on combination tanning with tannic acid (TA) and Laponite nanoclay has been proposed. Thermal stability measurements show that the introduction of Laponite nanoclay gives an obvious increase in the shrinkage temperature (T-s) of TA-tanned leather, implying the presence of the synergistic effect between TA and Laponite nanoclay in the combination tanning process. The optimized tanning system, i.e. 20% TA combination tanned with 3% Laponite in one bath for 3 hours at 25 degrees C and final pH similar to 3.5, confers wet-white leathers with T-s above 89 degrees C, and good storage stability. The introduction of Laponite nanoclay facilitates the fixation of TA in the wet-white leather. Scanning electron microscopic (SEM) results show that the combination tanned leathers exhibit fine isolated collagen fibre networks in comparison with that of solo TA and solo Laponitetanned leather. The presence of Laponite nanoclay not only improves the mechanical strength of the resulting leather, but also gives an ultraviolet protection property.

• 出版日期2016-2
• 单位四川大学