Hydrogel-assisted microfluidic spinning of stretchable fibers via fluidic and interfacial self-adaptations

Author:

Zhao Guoxu1ORCID,Wu Tinglong1,Wang Ruhai2,Li Zhong2,Yang Qingzhen34ORCID,Wang Lei1,Zhou Hongwei2ORCID,Jin Birui2,Liu Hao34ORCID,Fang Yunsheng34ORCID,Wang Dong1ORCID,Xu Feng34ORCID

Affiliation:

1. State Key Laboratory of Digital Medical Engineering, Key Laboratory of Biomedical Engineering of Hainan Province, School of Biomedical Engineering, Hainan University, Haikou 570228, P.R. China.

2. School of Material Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, P.R. China.

3. The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, P.R. China.

4. Bioinspired Engineering and Biomechanics Center (BEBC), Xi’an Jiaotong University, Xi’an 710049, P.R. China.

Abstract

Stretchable polymeric fibers have enormous potential, but their production requires rigorous environmental controls and considerable resource consumption. It's also challenging for elastic polymers with high performance but poor spinnability, such as silicones like polydimethylsiloxane and Ecoflex. We present a hydrogel-assisted microfluidic spinning (HAMS) method to address these challenges by encapsulating their prepolymers within arbitrarily long, protective, and sacrificable hydrogel fibers. By designing simple apparatuses and manipulating the fluidic and interfacial self-adaptations of oil/water flows, we successfully produce fibers with widely controllable diameter (0.04 to 3.70 millimeters), notable length, high quality (e.g., smooth surface, whole-length uniformity, and rounded section), and remarkable stretchability (up to 1300%) regardless of spinnability. Uniquely, this method allows an easy, effective, and controllable reshaping production of helical fibers with exceptional stretchability and mechanical compliance. We deeply reveal the mechanisms in producing these fibers and demonstrate their potential as textile components, optoelectronic devices, and actuators. The HAMS method would be a powerful tool for mass-producing high-quality stretchable fibers.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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