海藻酸钠中空纤维马达的设计、运动调控及染料降解应用

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中图分类号：TB333文献标志码：A

文章编号：1673-3851（2025）07-0469-11

引用格式：，．海藻酸钠中空纤维马达的设计、运动调控及染料降解应用[J].浙江理工大学学报（自然科学），2025，53（4）：469-479.

Abstract： Coaxial fibers were prepared by coaxial wet spinning of sodium alginate （SA） and SA/Fe3O4 loaded with Fe3O4 ，and SA@Pt and SA/Fe3O4@Pt hollow fiber motors were obtained by wet chemically depositing platinum （ Pt ） nanoparticles onto the inner wall of the hollow fibers. The morphology and structural composition of the hollow fiber motors were characterized using SEM， XRD，and FTIR. The motion behavior of the holow fiber motors was regulated，and their eficacy on pollutant degradation was evaluated. The results demonstrated that hollow fiber motors containing Pt nanoparticles could achieve autonomous motion in H2O2 ． The motion speed of could reach 2.1mm/s as the mass fraction of H2O2 was 2% ， showing good motion performance. Furthermore， the motion modes of the SA （20 hollow fiber motors could be modulated by adjusting the shape of the ports and the length of the hollow fibers，resulting in both linear and rotational movement patterns. When guided by an external magnetic field，the SA/Fe3O4@Pt motor could move along a predetermined path， including forming complex trajectories such as 'ZSTU′ ， showcasing its versatile movement and high precision control. Finally，the SA/Fe3O4@Pt achieved a 93.4% and 87.9% degradation rate of malachite green and Rhodamine B within 120mins ，with consistent performance over three cycles. This study provides new insights into the design and application of sodium alginate-based hollow fiber motors for eficient polutant degradation.

Key words： sodium alginate；holow fiber motors； coaxial spining; magnetic drive； bubble drivecontaminant degradation

0 引言

微纳米马达（Micro/nanomotors，MNM）是一种可以将化学能（化学燃料）或外部刺激（光、电、磁和超声波等）转化为机械能的微小装置[1。（剩余19220字）