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Quick-Release Antifouling Hydrogels for Solar-Driven Water Purification.


ABSTRACT: Hydrogels are promising soft materials for energy and environmental applications, including sustainable and off-grid water purification and harvesting. A current impediment to technology translation is the low water production rate well below daily human demand. To overcome this challenge, we designed a rapid-response, antifouling, loofah-inspired solar absorber gel (LSAG) capable of producing potable water from various contaminated sources at a rate of ∼26 kg m-2 h-1, which is sufficient to meet daily water demand. The LSAG-produced at room temperature via aqueous processing using an ethylene glycol (EG)-water mixture-uniquely integrates the attributes of poly(N-isopropylacrylamide) (PNIPAm), polydopamine (PDA), and poly(sulfobetaine methacrylate) (PSBMA) to enable off-grid water purification with enhanced photothermal response and the capacity to prevent oil fouling and biofouling. The use of the EG-water mixture was critical to forming the loofah-like structure with enhanced water transport. Remarkably, under sunlight irradiations of 1 and 0.5 sun, the LSAG required only 10 and 20 min to release ∼70% of its stored liquid water, respectively. Equally important, we demonstrate the ability of LSAG to purify water from various harmful sources, including those containing small molecules, oils, metals, and microplastics.

SUBMITTER: Xu X 

PROVIDER: S-EPMC9951281 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature

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Quick-Release Antifouling Hydrogels for Solar-Driven Water Purification.

Xu Xiaohui X   Guillomaitre Néhémie N   Christie Kofi S S KSS   Bay R Ko Nane RKN   Bizmark Navid N   Datta Sujit S SS   Ren Zhiyong Jason ZJ   Priestley Rodney D RD  

ACS central science 20230208 2


Hydrogels are promising soft materials for energy and environmental applications, including sustainable and off-grid water purification and harvesting. A current impediment to technology translation is the low water production rate well below daily human demand. To overcome this challenge, we designed a rapid-response, antifouling, loofah-inspired solar absorber gel (LSAG) capable of producing potable water from various contaminated sources at a rate of ∼26 kg m<sup>-2</sup> h<sup>-1</sup>, whic  ...[more]

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