Structure and Properties of Bombyx Mandarina Silk Fiber and Hybrid Silk Fiber

ABSTRACT

Bombyx mandarina silk fibers, as a precious resource of wild silk fibers, have some different characteristics to Bombyx mori silk fibers. To make a better use of this precious green material in various fields, it is necessary to investigate the characteristics of the fibers. In this research, the structure and properties of Bombyx mori silk fiber, Hybrid silk fiber, and Bombyx mandarina silk fiber are studied and analyzed. In terms of secondary structure, β-sheet structures are dominant in all three fibers while random coil and α-helix structures account for smaller portions of the fibers. Bombyx mandarina silk fiber exhibits a characteristic of amino acid distribution where the content of glycine is higher than that of alanine. The further analysis indicates the breaking strength of B. mandarina silk fibers is superior to that of B. mori silk fiber although Bombyx mandarina silk fiber is finer than Bombyx mori silk fiber. Our investigations provide a significant guide in the development and utilization of these precious silk resources, and Bombyx mandarina and Hybrid silk fibers show good potential for application in the same fields as Bombyx mori silk fibers.

摘要

作为一种珍贵的野蚕丝资源, 野桑蚕丝具有与家蚕丝不同的特性。为更好地利用这种珍贵的绿色材料, 很有必要对其特性进行研究。本文研究分析了家蚕丝、杂交蚕丝及野桑蚕丝的结构和性能。三种蚕丝的二级结构都是以β-折叠结构为主, 同时还含有无规卷曲结构和α-螺旋结构。野桑蚕丝的氨基酸分布特征是甘氨酸的含量高于丙氨酸的含量。进一步的研究表明, 尽管野桑蚕丝的纤度低于家蚕丝, 但野桑蚕丝的断裂强度却优于家蚕丝。我们的研究为这些珍贵的蚕丝资源的开发与利用提供了重要的指导, 同时野桑蚕丝和杂交蚕丝在家蚕丝的应用领域上表现出了良好的潜力。

KEYWORDS:

• Bombyx mandarina silk fiber
• hybrid silk fiber
• structure
• property

关键词:

• Bombyx mandarina silk fiber,野桑蚕丝
• Hybrid silk fiber, 杂交蚕丝
• structure, 结构
• property,性能

Additional information

Funding

This work was funded by grants from the National Natural Science Foundation of China (No. 31830094, No. 31472153), the Hi-Tech Research and Development 863 Program of China (grant No. 2013AA102507), the Funds of China Agriculture Research System (No. CARS-18-ZJ0102), and Fundamental Research Funds for the Central Universities(XDJK2019C104), China Postdoctoral Science Foundation (2019M653819XB).

Notes on contributors

Tingting Deng

Tingting Deng, Master, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, College of Textile and Garment, Southwest University, Chongqing 400715, China.

Lan Cheng

Lan Cheng, Dr., State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing 400715, China.

Yunwu Peng

Yunwu Peng, Master, Ankang College, Ankang 725000, China.

Xiaoling Tong

Xiaoling Tong, Professor, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing 400715, China.

Nangkuo Guo

Nangkuo Guo, PhD candidate, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing 400715, China.

Zhi Li

Zhi Li, Associate professor, Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Textile and Garment, Southwest University, Chongqing 400715, China.

Tianfu Zhao

Tianfu Zhao, Associate professor, Chongqing Engineering Research Center of Biomaterial Fiber and Modern Textile, College of Textile and Garment, Southwest University, Chongqing 400715, China.

Fangyin Dai

Fangyin Dai, Professor, State Key Laboratory of Silkworm Genome Biology, Key Laboratory of Sericultural Biology and Genetic Breeding, Ministry of Agriculture, College of Biotechnology, Southwest University, Chongqing 400715, China.