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Energy-saving Cooling Coated Fabric with Robust Solar Reflection and Water Repellent Properties
Miao Qi,Ying Wang,Guangtao Chang,Ruoxin Li 한국섬유공학회 2022 Fibers and polymers Vol.23 No.7
With the global climate changing, people are more aware of energy consumption and are interested in energysavingproducts or materials. One way to reduce energy consumption to improve personal thermal management efficiency isurgently needed. Therefore, we provide an alternative energy-saving method that will improve fabrics’ thermal managementby blocking infrared heat and ultraviolet light from solar radiation. A phase-inversion technique was developed to preparepoly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP) micro-size and nano-size composite pore structure which canblock out the sun and be coated on fabric material. Meanwhile, by adding hydrophobic SiO2 aerogel particles (SA) to thesystem, the surface of coating became superhydrophobic, it improved waterproof and moisture-permeable properties offabric which are important for wearing or using pleasantly. It can be used for any outdoor application such as tents, clothing,or some indoor use as well.
The Influence of Nano- and Micron-size of MXene Flakes on the Electrochemical Performance
Feng Ye,Bingbing Xu,Ronghu Chen,Ruoxin Li,Guangtao Chang 대한금속·재료학회 2023 ELECTRONIC MATERIALS LETTERS Vol.19 No.6
MXene, as a new type of two-dimensional material, has attracted much interest since it was discovered in 2011. However, only few articles discussed the eff ect of MXene fl ake size on its electrochemical performance. Here, a sand milling way is explored to produce nano-size MXene and the MILD method is used to prepare micron-size MXene (1 μm) as a comparison. Meanwhile, a mask-assisted interdigital micro-supercapacitors is prepared to explore the dependence of the electrochemical properties of MXene on their fl ake size. We show that nano-size MXene (200 nm) has a higher ionic conductivity as compared to normal micron-size MXene (1 μm). On the contrary, the larger fl ake size has higher electrical conductivities. As a result, the capacitance of micron-size MXene is better than nano-size MXene (200 nm) because the electrical conductivities are dominant. This research is helpful for further understanding of the infl uence of MXene fl ake size on its electrochemical performance.