Thermo‐Responsive MOF/Polymer Composites for Temperature‐Mediated Water Capture and Release

Abstract

We report an in situ polymerization strategy to incorporate a thermo‐responsive polymer, poly(N‐isopropylacrylamide) (PNIPAM), with controlled loadings into the cavity of a mesoporous metal–organic framework (MOF), MIL‐101(Cr). The resulting MOF/polymer composites exhibit an unprecedented temperature‐triggered water capture and release behavior originating from the thermo‐responsive phase transition of the PNIPAM component. This result sheds light on the development of stimuli‐responsive porous adsorbent materials for water capture and heat transfer applications under relatively mild operating conditions.

Tillandsia‐Inspired Hygroscopic Photothermal Organogels for Efficient Atmospheric Water Harvesting

“…Also, the highly hydrophilic hydrogel‐based sorbents (mainly aerogel or xerogel) can experience a hygroscopic process via hydrogen bonding and further contain abundant water molecules inside the three‐dimensional (3D) cross‐linked network in the form of swelling . Yet, due to the relatively low diffusion rate inside the dried network, the hydrogel‐based sorbents may suffer from unsustainable sorption capability once water molecules completely cover their surface . On the other hand, the porous structure of these hydrogel‐based sorbents can experience a potential risk of collapse, either in the preparation procedures or the water sorption‐desorption cycles, resulting in a performance decline in moisture sorption.…”

“…On the other hand, the porous structure of these hydrogel‐based sorbents can experience a potential risk of collapse, either in the preparation procedures or the water sorption‐desorption cycles, resulting in a performance decline in moisture sorption. Moreover, the alternative integration of solid sorbents into the abovementioned porous materials can prominently enhance the sorption capacity via the synergistic mechanism of physical and chemical sorption . However, salts agglomeration and leakage during hydration/dehydration cycles still remain a challenge for practical AWH application.…”

Screening of metal–organic frameworks for water adsorption heat transformation using structure–property relationships

“…By using MOF/water working pairs, much signicant progress has been achieved in the elds of adsorption heat transformation. [11][12][13] Furukawa et al 14 prepared a series of zirconium(IV) MOFs by using various organic linkers. Among these materials, MOF-801 and MOF-841 showed the highest water adsorption performance.…”

Tillandsia‐Inspired Hygroscopic Photothermal Organogels for Efficient Atmospheric Water Harvesting

“…[2a, 6] Yet, due to the relatively low diffusion rate inside the dried network, the hydrogel-based sorbents may suffer from unsustainable sorption capability once water molecules completely cover their surface. [7] On the other hand, the porous structure of these hydrogel-based sorbents can experience ap otential risk of collapse,e ither in the preparation procedures or the water sorption-desorption cycles, resulting in ap erformance decline in moisture sorption. Moreover,t he alternative integration of solid sorbents into the abovementioned porous materials can prominently enhance the sorption capacity via the synergistic mechanism of physical and chemical sorption.…”