- 期刊
可用於低耗能空氣造水之MOF－高分子複合材介紹及重現
MOF-polymer composite material capable of atmospheric water harvesting with low energy consumption: Introduction and reproduction
摘要
我國有因氣候異常使降雨量減少而導致缺水之風險，可利用空氣造水機與海水淡化廠技術來分散風險，因為此二種技術之造水量受天氣影響較小。然而目前此二種技術之能耗都偏高，因此研發耗能更低之造水技術有其重要性。本研究關注一近期被提出之新技術：自發性造水之高分子複合材。此材料為一種金屬有機骨架（MOF）材料MIL-101（Cr）和一種高分子聚合物PNIPAM之複合材，可自發進行空氣造水而不需額外能量輸入，然而其在中低濕環境下造水能力和高濕環境相比大幅降低。因此本研究以此材料作為基準，嘗試自製並重現其造水能力，期望可作為後續研究之基礎。結果成功製備出具有均一微米級粒徑之MIL-101（Cr）顆粒，其水氣吸附量佔材料重量百分比最高可達96.5 wt%，經適當後處理後甚至可達111.1 wt%。而將其與PNIPAM結合製備出的複合材經測試後具有自發造水能力。惟造水速率測值約為18.7 wt%/日@25℃,90%RH，與基準值相比仍較低，顯示製備過程中之製程參數仍有最佳化之空間。
並列摘要
There is significant risk of drought in Taiwan caused by the lack of rain resulted from climate abnormality. This risk can be diverted through the application of atmospheric water harvesting and sea water desalination technologies, since they are less dependent on weather. However, these two technologies consume large amounts of energy which gives rise to the significance of developing new water harvesting technologies which are more energy efficient. In this research a novel technology recently published is considered: autonomous atmospheric water seeping metal organic framework (MOF) matrix, which is a composite material of a polymer PNIPAM and a MOF MIL-101(Cr). It can harvest atmospheric water without the need of external energy supply, but its performance in low humidity environment is significantly worse compared to that under high humidity. Therefore, in this research this technology is treated as a benchmark and attempts are made to recreate it, by synthesis of the material and measurement of its water harvesting ability, in order to support further research. As a result, MIL-101(Cr) particles with a uniform size of 1 μm order were successfully prepared. They show high water uptake ranging from 96.5 wt% of the material's weight at dry state, to 111.1 wt% if properly processed after synthesis. The composite material of MIL-101(Cr) and PNIPAM was also prepared, which shows the ability to automatically harvest water from air. The water production rate was measured to be 18.7 wt% of the material's dry weight per day at an environment of 25 ℃, 90 %RH, which is lower than the benchmark, indicating the preparation can be optimized.
參考文獻
延伸閱讀
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