Modification and Biomimetic Preparation of Two-Dimensional Alginate Actuator for Improving Wet Response 


Vol. 26,  No. 12, pp. 5293-5306, Dec.  2025
10.1007/s12221-025-01193-8


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  Abstract

The flexible yarn actuator driven by wetting is advantageous in environmental adaptability as smart wearable elements. Here, two-dimensional alginate fiber yarns were prepared by blending alginate fiber with viscose fiber to enhance the spinnability and hygroscopicity of alginate fiber. Polyvinyl alcohol (PVA) and glutaraldehyde (GA) were cross-linked with alginate fiber blended yarns. The alginate yarn actuator was prepared by imitating spiral plant vines and stems and optimized by varying processing parameters as well as simulated with Finite Element Software. The results show that the shrinkage of different blended ratios is consistent at relative humidity from 20 to 40%, but after 40%, the shrinkage of blended yarn actuator with alginate/viscose fibers of 40/60 is significantly greater than that of 50/50, showing an excellent actuation among the three physical blended yarns. The contraction of yarn actuator model demonstrates consistent tendency with the experimental results. After modified with PVA and GA, hydrophilicity of the blended yarns is further increased. The shrinkage ratio of the yarn actuator is 29.09% at 5% PVA concentration. During the biomimetic preparation, the shrinkage ratio of yarn actuator increases with the twist number while decreases with the coil number. Meanwhile, the work capacity of yarn actuator increases with load weight and decreases with coil yarn number. At linear density of 240 tex, twist of 500 twists /m, load weight of 1.8 g and coil number of 4 coils /cm, the maximum shrinkage ratio of PVA modified yarn actuator reaches 50.18%. The chemically modified alginate yarn actuator shows high stability.

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  Cite this article

[IEEE Style]

F. Li, B. Liu, Q. Wang, D. Zhang, "Modification and Biomimetic Preparation of Two-Dimensional Alginate Actuator for Improving Wet Response," Fibers and Polymers, vol. 26, no. 12, pp. 5293-5306, 2025. DOI: 10.1007/s12221-025-01193-8.

[ACM Style]

Fengyan Li, Bingbing Liu, Qianru Wang, and Dingtiao Zhang. 2025. Modification and Biomimetic Preparation of Two-Dimensional Alginate Actuator for Improving Wet Response. Fibers and Polymers, 26, 12, (2025), 5293-5306. DOI: 10.1007/s12221-025-01193-8.

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