Optical metamaterial wearable fabric comes out

Recently, researchers from Huazhong University of Science and Technology have developed an optical metamaterial fabric with a morphological hierarchical structure that can be prepared in large quantities
.
Compared with white cotton fabric, the fabric can cool the human body surface by nearly 5°C, has excellent wearability, and is suitable for large-scale promotion and preparation

Based on the principle of radiant refrigeration and the design concept of morphological classification, the research team proposed a metamaterial fabric with a morphological hierarchical structure, which is classified in different spaces and different scales according to the spatial structure, fiber structure and nanostructure of the fiber.
A morphological grading system that is macroscopically ordered and microscopically random
.

The research team combined optical metamaterial technology with batch fiber preparation technology, and selected green and environmentally friendly, biodegradable polylactic acid as the fiber raw material to obtain uniform and continuous metamaterial fibers
.

On this basis, they used spinning, weaving and lamination technology to obtain a metamaterial fabric with 92.
4% reflectivity in the sunlight waveband, 94.
5% emissivity in the mid-infrared waveband, and low-cost, green, environmentally friendly, and industrial Advantages such as chemistry
.
After testing, under passive conditions, metamaterial fabrics can achieve a good cooling effect that is 2°C~10°C lower than the ambient temperature throughout the day

In the simulated human skin test at noon, compared to commercial fabrics of the same color, the simulated skin temperature under the metamaterial fabric can be reduced by 5℃~7℃
.
In the cooling test of the car model, the internal temperature of the model covered with the metamaterial fabric can be reduced by 27°C compared with the commercial car cover, and the temperature can be reduced by 30°C compared with the model without the fabric cover