A porous micro/nano-structured polyethylene film prepared using a picosecond laser for agricultural passive cooling

Passive cooling materials, as a promising choice for mitigating the global energy crisis, have limited use as their cooling effects are usually weakened or lost by dust contamination. In this study, a passive cooling polyethylene (PE) film with self-cleaning properties is prepared by picosecond lase...

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Bibliographic Details
Published in:Nanoscale 2024-03, Vol.16 (11), p.5674-5684
Main Authors: Wang, Qingwei, Chu, Dongkai, Wang, Qilin, Xu, Xiangyue, Yin, Kai, Qu, Shuoshuo, Yao, Peng, Huang, Chuanzhen
Format: Article
Language:English
Subjects:
Cleaning
Cooling
Cooling effects
Corrosion resistance
Laser ablation
Lasers
Polyethylene
Polyethylene films
Soil contamination
Sustainable development
Transmittance
Water vapor
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Summary:Passive cooling materials, as a promising choice for mitigating the global energy crisis, have limited use as their cooling effects are usually weakened or lost by dust contamination. In this study, a passive cooling polyethylene (PE) film with self-cleaning properties is prepared by picosecond laser ablation. Numerous root-like hierarchical porous micro/nano-structures were obtained on the double side of the PE film. The outside (toward air) shows excellent self-cleaning, corrosion resistance, and anti-friction properties. The inside (towards crops) further reduced the transmittance and water vapor evaporation (keeping the soil moist). Compared with the pristine PE film, the transmittance of the as-prepared double-sided micro/nano-structured PE film decreased by about 40%. In addition, during the crop cultivation experiment, the temperature of the crop leaves was reduced by 2.7-7 °C and showed a higher plant height and greater leaf width under the cover of the laser-treated film. This demonstrates that the passive cooling PE film has an excellent temperature regulation ability and good practical application effects. This study proposes a simple strategy based on a picosecond laser for the preparation of passive cooling materials, which are beneficial for alleviating energy crises and promoting sustainable development. Porous micro/nanostructured polyethylene films with excellent passive cooling and self-cleaning characteristics is processed by picosecond lasers.
ISSN:2040-3364
2040-3372
DOI:10.1039/d3nr06262g