Due to global warming and the energy crisis, incorporating
passive
radiative cooling into personal thermal management has attracted extensive
attention. However, developing a wearable textile that reflects incoming
sunlight and allows mid-infrared radiation transmission is still a
tough challenge. Herein, a shish-kebab superstructure film was produced
via a flow-induced crystallization strategy for personal radiative
cooling. The resulting film endowed a high infrared transmittance
(87%) and improved sunlight reflectivity (83%). A device was developed
to simulate the human body skin, and the temperatures of the shish-kebab
film were 2.5 and 2.6 °C lower than that of traditional textile
in outdoor and indoor tests, respectively. In order to make the shish-kebab
film more wearable, a series of modifications were then carried out.
This study demonstrates the substantial potential to personal thermal
management textiles.
Background:
The quality control indexes detected by the existing methods are less and lack
specificity, and cannot truly reflect their intrinsic quality because of the similarity of Schisandra chinensis
and Schisandra sphenanthera in both their appearance and their main chemical composition. Therefore,
it is urgent to establish an effective method for the quality control of the both. High-performance
capillary electrophoresis (HPCE) method was used to establish the fingerprints of Schisandra medicinal
materials.
Methods:
The HPCE was performed, in which a 50µm × 50cm (the effective length was 41.5cm) uncoated
fused silica capillary column was applied, the buffer solution was 10 mM phosphate buffer (pH
8)-37.5 mM SDS-35% acetonitrile (v/v), the working voltage was 28 kV, the temperature was 25°C, the
samples were injected at 50mbar pressure for 3s, and the detection wavelength was 214nm. The chromatographic
fingerprints of samples were analyzed using “traditional Chinese medicine chromatographic
fingerprint similarity evaluation system 2004A version” software and cluster analysis.
Results:
10 common peaks were confirmed and 8 components were identified in the HPCE fingerprints
of 20 batches of Schisandra chinensis and Schisandra sphenanthera, and the results of clustering were
consistent with those of similarity evaluation.
Conclusion:
This method should be accurate and reliable, and can provide a scientific basis for the
quality evaluation of Schisandra medicinal materials.
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