Thermoresponsive and antifouling hydrogels as a radiative energy driven water harvesting system,Materials Chemistry Frontiers

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Thermoresponsive and antifouling hydrogels as a radiative energy driven water harvesting system
Materials Chemistry Frontiers ( IF 6.0 ) Pub Date : 2020-11-11 , DOI: 10.1039/d0qm00584c
Diego Combita _{1,

2,

3,

4} , Marya Ahmed _{2,

3,

4,

5}

Affiliation

Hygroscopic and temperature-responsive hydrogels with the potential to harvest water from air followed by its release in liquid or vapor form have seen much interest as water harvesting materials for arid regions. However, the purification of water from wastewater remains a major challenge and only a handful of technologies are being investigated for their potential to purify water from polluted resources. In this study, we explore the synthesis of antifouling and radiative heat driven water-harvesting hydrogels that are capable of absorbing clean water from resources polluted with organic waste, followed by its release, mainly in liquid form, as a function of temperature. The new thermoresponsive hydrogels are comprised of hygroscopic and antifouling vitamin B5 analogous monomers (B5AMA) and 2-(2-methoxyethoxy)ethyl methacrylate (MEO₂MA) and are evaluated for their kinetics of water uptake and release capacity. The poly(B5AMA-co-MEO₂MA) hydrogels are further evaluated for their ability to recycle clean water from organic polluted wastewater resources and for their potential to develop a radiative energy driven water harvesting system. The hydrogels synthesized are found to be extremely hygroscopic and can recycle 6.84 g of water per g of hydrogel (∼85% water recycling efficiency) upon heating at 60 °C. The hydrogels are also extremely antifouling and can repel 1.5 × 10⁹ bacterial cells per mL of wastewater. The water release rate of the hydrogels is dependent upon the time and temperature and can be tuned to develop a solar fueled water harvesting system.

中文翻译：

热响应和防污水凝胶作为辐射能驱动的集水系统

具有吸湿性和温度响应性的水凝胶具有作为潜在的干旱地区集水材料的潜力，它有潜力从空气中收集水，然后以液态或蒸气形式释放。然而，从废水中提纯水仍然是一个主要挑战，目前仅研究了少数技术从污染资源中提纯水的潜力。在这项研究中，我们探索了防污和辐射热驱动集水水凝胶的合成，这些水凝胶能够从受有机废物污染的资源中吸收清洁水，然后随温度的变化主要以液体形式释放。新的热响应水凝胶由吸湿和防污的维生素B5类似单体（B5AMA）和2-（2-甲氧基乙氧基）甲基丙烯酸乙酯（MEO）组成₂ MA），并评估其吸水和释放能力的动力学。进一步评估了聚（B5AMA- co- MEO₂ MA）水凝胶从有机污染废水资源中回收清洁水的能力以及开发辐射能驱动的水收集系统的潜力。发现合成的水凝胶极具吸湿性，在60°C加热时，每克水凝胶可回收6.84克水（约85％的水循环效率）。水凝胶还具有极强的防污性能，每毫升废水可排斥1.5×10^9个细菌细胞。水凝胶的水释放速率取决于时间和温度，可以调整以开发太阳能供水的收集系统。

更新日期：2020-12-10

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