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Published on: October 13, 2019
Bioinspired phase-change micromotors with buoyancy-switchable vertical migration for efficient microplastic capture
Dang Zhang1, Mengying Zhang1, Bohan Song2
1State Key Laboratory of Urban-rural Water Resources and Environment, State Key Laboratory of Advanced Inorganic Fibers and Composites, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China. zhangxingwen@hit.edu.cn.
Chemical Communications (Cambridge, England)
|August 11, 2026
Summary
Bioinspired micromotors using paraffin and iron oxide nanoparticles efficiently capture microplastics. These fuel-free devices use light-triggered phase changes for controlled movement in water for environmental remediation.
Area of Science:
- Materials Science
- Environmental Science
- Nanotechnology
Background:
- Microplastic pollution poses a significant threat to aquatic ecosystems.
- Current microplastic remediation methods often require fuels or complex setups.
- Developing efficient, autonomous, and eco-friendly capture systems is crucial.
Purpose of the Study:
- To develop novel bioinspired micromotors for efficient microplastic capture.
- To utilize a phase-change material integrated with magnetic nanoparticles for propulsion.
- To create a fuel-free, light-controlled system for microplastic remediation.
Main Methods:
- Fabrication of paraffin@Fe3O4 composite micromotors.
- Utilizing Fe3O4 nanoparticles to absorb near-infrared (NIR) light and generate heat.
- Inducing reversible phase transitions (melting and solidification) in paraffin via NIR light for controlled vertical movement.
- Demonstrating microplastic capture using the micromotors' migration.
Main Results:
- Successful synthesis of paraffin@Fe3O4 micromotors.
- Demonstrated light-induced heating and reversible phase transition of paraffin.
- Achieved controlled ascent and sinking of micromotors in aqueous environments.
- Showcased enhanced microplastic capture efficiency due to directed movement.
Conclusions:
- The paraffin@Fe3O4 micromotors offer a promising fuel-free platform for active microplastic remediation.
- The bioinspired design enables efficient and controlled microplastic capture in aquatic systems.
- This technology presents a sustainable approach to tackling microplastic pollution.
