Correlation between the mechanical behavior and chemical, physical and thermal characteristics of wool: a study on Tunisian wool

ABSTRACT

Tensile mechanical properties differ from one wool fiber to another due to several factors. To better understand the reasons for these differences, this work studied the physical, chemical, thermal and mechanical characteristics of five breeds of Tunisian wool. We used a total of 200 samples, taken from Tunisian sheep of different breeds, sexes and age. Results showed that the wool with the highest degree of crystallinity, the coarsest diameter, and the lowest amount of 1/2 Cystine has the best mechanical properties and vice versa. We also found, a significant influence (P < 0.05%) of breed and sex on the mechanical behavior of wool.

摘要

不同因素导致羊毛拉伸力学性能不同。为了更好地理解这些差异的原因，本研究对五种突尼斯羊毛的物理、化学、热学和力学特性进行了研究。我们使用了来自不同品种、性别和年龄的突尼斯绵羊共计200个样品。结果表明，随着结晶度最高的羊毛，最粗的直径，和1/2的胱氨酸的含量最低的具有最佳的力学性能，反之亦然。我们还发现，品种和性别对羊毛力学行为有显著的影响（P＜0.05%）。

KEYWORDS:

• Wool
• fiber diameter
• thermal behavior
• amino acids
• tensile breaking strength
• Young’s modulus

关键词:

• 羊毛
• 纤维直径
• 热行为
• 氨基酸
• 拉伸断裂强度
• 杨氏模量。

Acknowledgments

The authors thank Dr. Claudio Tonin (Consiglio Nazionale delle Ricerche, Istituto per lo Studio delleMacromolecole, Biella, Italy) for their interest in this work, for helpful discussions, for the support and for assistance in the experimental work.