纺锤节微纤维的微流控制备及集水机制的研究进展

doi:10.11896/cldb.20060132

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Abstract The shortage of fresh water, which afflicts two-thirds of the global population, has become a worldwide problem. In nature, spider silk has the ability to collect water from fog because of its unique periodic spindle-knotted structure and chemical composition. This phenomenon urges researchers to fabricate the bioinspired spindle-knotted microfibers with high water collection efficiency and explore its water collection mechanism.
Usually, spindle-knotted microfibers can be fabricated by dip-coating, fluid-coating and electrospinning technology. However, these approaches have little control over the size and shape of spindle-knotted microfibers, which limits application of spindle-knotted microfibers in water collection. Microfluidic spinning technology is not only controllable, safe and stable, but also can assemble various materials simultaneously. Therefore, microfluidic spinning technology is becoming a research hotspot for its controllable fabrication of spindle-knotted microfibers.
Microfluidics for fabricating spindle-knotted microfibers can be divided into three categories, pneumatic-valve microfluidic-chip spinning method, emulsion based coaxial microfluidic method and poly-phase laminar flow based coaxial microfluidic method. By adjusting the liquid velocity and composition, the size, spacing, surface roughness and other aspects of the spindle-knot on the fiber can be regulated. By exploring the diffe-rence of the water collection performance of the spindle-knotted microfibers under different conditions, the water collection mechanism has been studied to improve the water collection efficiency.
This article systematically reviews the research progress of the spindle-knotted microfibers fabricated by microfluidic in the field of water collection. The water collection process of spider silk and the preparation method of spindle-knotted microfibers using microfluidic spinning technology have been summarized, and special emphasis is given to the water collection mechanism and the water collection ability of spindle-knotted microfibers. It is expected to provide scientific guidance for the controllable preparation and water collection application of the new spindle-knotted microfibers.

Key words： microfluidics microfiber spindle-knot water collection

Published: 10 March 2022 Online: 2022-03-08

CLC number:

TB34

Fund:National Natural Science Foundation of China (21776230).

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	Articles by authors
	LIU Huanyu
	SUN Hejia
	YIN Wei
	WANG Yiying
	MENG Tao

Cite this article:

LIU Huanyu,SUN Hejia,YIN Wei, et al. Recent Advances of Microfluidics-based Preparation Methods and Water Collection Mechanisms of Bioinspired Spindle-Knotted Microfibers[J]. Materials Reports, 2022, 36(5): 20060132-7.

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http://www.mater-rep.com/EN/10.11896/cldb.20060132 OR http://www.mater-rep.com/EN/Y2022/V36/I5/20060132

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