Coal, natural gas, and petroleum-based fuel emissions are significant contributors to air pollution and, as a result, global warming. Solar energy holds promise in attempts to transition to a sustainable, carbon-neutral energy economy.
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太阳能丰富且对环境有益，如果有效利用人类对传统能源的依赖有可能最大程度地减少人类对传统能源的依赖。
在这种情况下，相变材料（PCM）是太阳能存储设备的有利选择，欧洲杯足球竞彩因为它们在相变时吸收了足够的能量（以潜热的形式）提供有用的加热或冷却。
According to research, a solar-powered PCM-based cooling system can lower the ambient temperature by 30 °C. However, realistic PCMs have leakage and corrosion problems. Furthermore, because of their limited thermal conductivity, they have poor heat transfer qualities. While metal PCMs can overcome this problem, they are more expensive and heavier.
根据研究，避免这些挑战的一种选择是将PCM封闭在具有高导度填充剂（如纳米颗粒）的微胶囊中。欧洲杯猜球平台这可以使他们免受光，热，水分和氧气的有害影响，同时也提高了传热质量。为此，许多研究人员使用了低密度，非金属，高热导率纳米颗粒，从而消除了与金属纳米颗粒相关的问题。欧洲杯猜球平台
来自中国和美国的科学家最近使用N-二十二烷（ODE）作为PCM核心和硅碳化物（SIC）纳米粒子型交联的聚苯乙烯（Clps）作为外壳。
Phase change microcapsule materials have been the focus of our research. In a previous study, we found that a single organic shell has defects in thermal conductivity and stability, while a single inorganic shell is not satisfactory in compactness and coverage. Therefore, we began to focus on doping organic shells with inorganic nanoparticles to obtain organic-inorganic hybrid shells。
Jifen Wang, Study Author and Professor, Shanghai Polytechnic University
The research was published on September 29th，2022年Energy Storage and Saving杂志。
The researchers created a series of four microcapsules using a technique known as “suspension polymerization.” They then used energy-dispersive X-Ray spectroscopy, scanning electron microscopy, and Fourier transform infrared spectroscopy to analyze the microcapsules.
研究结果表明，微胶囊是球形的，并且将SIC纳米颗粒植入了CLPS壳中，从而增强了微胶囊的传热和光热转化效率。欧洲杯猜球平台
接下来，科学家研究了微胶囊的热性能，发现它们在光热转化和导热率中的表现优于非掺杂样品。在测试的四种类型的掺杂微胶囊中，具有1.25 wt％纳米含量的掺杂的一种，具有54.9％的光热转化效率，比其非掺杂型的146％好！
With such promising results, the innovative PCM microcapsule shells might serve as a firm base for future research on energy materials with high solar energy storage and conversion efficiency. The research also paves the way for the practical use of multifunctional phase change microcapsules.
这些微胶囊可以作为太阳能设备，智能热绝缘设备和节能建筑物中的储能材料具有重要的潜在应用2020欧洲杯下注官网欧洲杯足球竞彩。
Jifen Wang, Study Author and Professor, Shanghai Polytechnic University
Journal Reference:
Zhao, K.,等。（2022）增强了用纳米 - 氧化掺杂的交联聚苯乙烯壳的相变光热转化和导热率。Energy Storage and Saving。doi.org/10.1016/j.enss.2022.09.003。
资源：https://en.sspu.edu.cn/