Study describes a novel portable 太阳的-steaming collection system with polymer origami which can collect and purify 水 以非常低的成本
全球对清洁的需求不断增加 水 owing to population growth, industrialization and contamination and depletion of our 行星的 自然资源。 太阳能-steaming is a technique in which 太阳能 can be used to purify 水 by evaporating contaminated 水, re condensing it and producing fresh clean 水. This technique is a clean, renewable and sustainable green technology which has the potential to address global scarcity of clean water by utilizing the abundance of 太阳的 energy. The strength and efficiency of a 太阳的-steaming system depends on its design and choice of photothermal materials. Current 太阳的-steaming technologies use expensive, bulky materials and have low efficiency and limited output. It has remained a challenge to enhance performance and lower costs in order to design a light weight and portable 太阳的-steaming system which can be directly used by individuals.
在 28 月 XNUMX 日发表的一项新研究中 先进材料 researchers describe a novel method for 太阳的 steaming by designing a low cost portable low-pressure controlled 太阳的 steaming collection system which can collect and purify 水 using energy from sunlight. They chose a photothermal polymer material called Polypyrrole (PPy) which is conductive in nature, is well-known for its photothermal properties and exhibits high efficiency in converting solar light into thermal heat. Inspired from the flower rose, the unique design of this solar steaming system is made of 3D origami PPy-paper composites. A ‘PPy rose’ which constitutes of layered black sheets shaped as petals was created via origami folding and chemical polymerization of PPy. This origami structure is attached to a stem-like cotton infused tube which collects raw/untreated water from a water source and feeds it to the PPy rose structure placed on the top. Cotton infused tube and Polystyrene foam were used to prevent direct contact between PPy material and bulk water.
Once untreated 水 reached the petals, PPy material in the flower structure turns 水 into steam and impurities naturally separate from the water. Subsequently, the water vapor needs to be condensed and then clean water needs to collected for use. Researchers used a low-pressure condition by using a portable vacuum pump. This was seen to significantly enhance the rates of both water evaporation and water collection. Once water is condensed, the compact and sturdy collecting glass jar securely stores clean water.
The 3D origamis provided significantly higher absorption of light and enhanced surface areas for 水 evaporation in comparison to a conventional 2D planar design. The water evaporation and collection rate is enhanced by 52 percent due to lowering of chamber pressure. PPy origami improved water evaporation by 71 percent and higher steam collection rates were also seen. The overall efficiency of the system increased by 91.5 percent under one light source. The system was tested on a sample from Colorado river in Texas, USA. The system removed contamination of water in the form of heavy metals, bacteria, salt and alleviates alkalinity producing clean water of drinking standards as set by WHO.
目前的研究描述了一种新颖的、合理的设计，该系统采用 3D 折纸光热材料的便携式低成本太阳能蒸汽收集系统，可提高水蒸发和蒸汽收集的速度。 每个花状结构的成本不到2美分，每小时每平方米可以成功生产2升清洁水。 这种设计可以成为制造用于清洁水生产的太阳能蒸汽独特模型的灵感。
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来源（S）
Li, W. 等。 2019. 带有聚吡咯折纸的便携式低压太阳能蒸汽收集系统。 先进材料。 http://doi.org/10.1002/adma.201900720
