隨著人口增長和科技工業的發展，全球對能源的需求不斷增加，也加劇了全球暖化的問題。全球電力負擔和全球暖化有一定相關性，得以突顯出輻射冷卻的優勢，輻射冷卻技術通過將熱能直接排放至宇宙，能夠以零能耗實現降溫，且具有廣泛應用的可行性，包含建築節能、戶外電子設備降溫，如太陽能電池，以及人體穿戴裝置、紡織領域。
本研究探討高效率、高耐用性之輻射冷卻氣凝膠，利用靜電紡絲法製備聚偏二氟乙烯（Polyvinylidene fluoride, PVDF）及聚環氧乙烷（Polyethylene oxide, PEO）微米纖維，並將所得到的纖維以冷凍乾燥法製成氣凝膠。在靜電紡絲過程中，因溶劑對非溶劑和溶質的親和力差異，使纖維出現非溶劑誘導式相分離（Nonsolvent-induced phase separation, NIPS），溶劑完全揮發後，在纖維表面形成孔洞結構。當應用於戶外輻射冷卻時，太陽光在入射後，在這些纖維和孔洞結構間多次反射與散射，且因孔洞存在會增大纖維比表面積，藉由提升表面積來增加輻射功率，使該纖維在特定波段下具有良好的反射性與發射性。
確定纖維薄膜光學性能後，進一步將纖維製備成氣凝膠。氣凝膠具備低熱傳導特性，能有效隔絕建築外部熱傳導並保持室內溫度穩定。最後，本研究測試氣凝膠的耐用性與低維護需求，如對紫外線、酸雨環境的耐受能力，以期其能長期應用於戶外環境。

With the growth of population and the development of technology and industry, global energy demand continues to rise, further exacerbating the problem of global warming. There is a correlation between electricity consumption and global warming, highlighting the advantages of radiative cooling. Radiative cooling dissipates heat directly into outer space, enabling zero-energy cooling.
This study develops a high-efficiency and durable daytime radiative cooling aerogel and investigates its potential for outdoor applications. Polyvinylidene fluoride (PVDF) and polyethylene oxide (PEO) microfibers were fabricated via electrospinning and transformed into aerogels through freeze-drying. Nonsolvent-induced phase separation produced porous structures, enhancing light scattering and radiative efficiency. The optimal sample exhibited 90.1% solar reflectance and 96% infrared emittance, along with low thermal conductivity (0.034 W/m·K) and good mechanical strength. Outdoor testing showed an average temperature reduction of 10.1 °C, with excellent UV resistance, self-cleaning, and anti-fouling performance.

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