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Seaweed Fiber Fabricated with Agar Alkali-Free Extracted from Gracilaria lemaneiformis

Yuzhi Wu1, Cunzhen Geng1,*, Chaochao Cui2, Zhefeng Xin2, Yanzhi Xia1, Zhixin Xue1,*

1 School of Chemistry and Chemical Engineering, State Key Laboratory of Bio-Fibers and Eco-Textiles, Marine Fiber New Material Institute, Qingdao University, Qingdao, 266071, China
2 Baoshan Hengfeng Textile Technology Co., Ltd., Baoshan, 678000, China

* Corresponding Authors: Cunzhen Geng. Email: ; Zhixin Xue. Email:

(This article belongs to this Special Issue: Natural Fibre Composites: Design, Materials Selection and Fabrication)

Journal of Renewable Materials 2023, 11(3), 1199-1208.


The sulfate groups in agar structure played a good role in the formation of fiber. However, commercially available agar is usually extracted from red algae by alkali treatment to decrease the content of sulfate group for the purpose of high gel strength. In this paper, an alkali-free method of agar extraction from Gracilaria lemaneiformis was proposed for the wet-spinning purpose. This method is environmentally friendly, reduces the extraction steps, saves energy, and reduces the production cost of agar fiber. The improved agar preparation process not only has higher agar yield, but also has higher molecular weight and sulfate group content, which is beneficial to the preparation and forming of fiber and makes the fiber have higher mechanical strength and elongation. Therefore, this extraction technology has broad application prospect in the textile field.

Graphical Abstract

Seaweed Fiber Fabricated with Agar Alkali-Free Extracted from <i>Gracilaria lemaneiformis</i>


Cite This Article

Wu, Y., Geng, C., Cui, C., Xin, Z., Xia, Y. et al. (2023). Seaweed Fiber Fabricated with Agar Alkali-Free Extracted from Gracilaria lemaneiformis. Journal of Renewable Materials, 11(3), 1199–1208.

This work is licensed under a Creative Commons Attribution 4.0 International License , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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