Desirable retanning system for aldehyde-tanned leather to reduce the formaldehyde content and improve the physical-mechanical properties
Desirable retanning system for aldehyde-tanned leather to reduce the formaldehyde content and improve the physical-mechanical properties
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醛鞣革理想的复鞣体系，降低甲醛含量，提高物理机械性能
DOI：
10.1016/j.jclepro.2017.12.058
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发表时间：
2018-02-20
影响因子：
11.1
通讯作者：
Shi, Liangjie
中科院分区：
文献类型：
--
作者：
Sun, Xiaopeng;Jin, Yong;Shi, Liangjie
本研究的目的是为醛鞣革提供一种新的复鞣体系，以改善合成革的物理机械性能，降低合成革中的甲醛含量。该复鞣体系由对人体无害的聚丙烯酸和gemini聚氨酯表面活性剂组成。分析了不同复鞣体系处理后皮革的物理力学性能，观察了新型复鞣体系处理后皮革的纤维结构；研究了gemini聚氨酯表面活性剂疏水链长、复鞣剂提供率和复鞣过程pH条件对皮革物理力学性能和甲醛含量的影响。结果表明，复合复鞣体系复鞣效果较好，上述因素会影响皮革的物理力学性能和甲醛含量。疏水链长为8，提供率为6%时，复鞣效果最好，增稠率为8.5%，伸长率和撕裂强度分别提高14.5%和18.4%。同时，甲醛含量降低率为30.0%。当复鞣阶段pH值降至2.7时，甲醛含量的降低率可提高到39.3%。该复鞣体系复鞣效果较好，有利于皮革的清洁生产和环境保护事业的发展。此外，该工作为解决我们生活中的其他甲醛问题提供了一个很好的替代方案。(C) 2017 Elsevier Ltd.版权所有。
The aim of the present work is to provide a new retanning system for aldehyde-tanned leather, which can improve the physical-mechanical property of resultant leather and reduce the formaldehyde content in the resultant leather. This new retanning system consists of polyacrylic acid and gemini polyurethane surfactant, which are not harmful to human. The physical-mechanical property of leathers treated with different retanning system was analyzed, and the fiber structure of leather treated with the new complex retanning system was observed; the effects of some factors on the physical-mechanical property and formaldehyde content of leathers were studied, which were the hydrophobic chain length of gemini polyurethane surfactant, the offer percentage of retanning agent and the pH condition of retanning process. The results showed that the complex retanning system had better retanning effect, and the physical-mechanical property and formaldehyde content of leathers would be affected by above factors. When the hydrophobic chain length was eight and the offer percentage was 6%, the retanning effect was the best, and the thickening rate was 8.5%, the elongation and tear strength increased by 14.5% and 18.4%, respectively. At the same time, the reduction rate of formaldehyde content was 30.0%. Notably, when the value of pH decreased to 2.7 in the retanning stage, the reduction rate of formaldehyde content could increase to 39.3%. This retanning system had better retanning effect, which indicated that it would be helpful to the clean production of leather and the development of environmental protection. In addition, the work provided a good alternative to solve the other formaldehyde problems in our life. (C) 2017 Elsevier Ltd. All rights reserved.