Shaping 90 wt% NanoMOFs into Robust Multifunctional Aerogels Using Tailored Bio‐Based Nanofibrils

Abstract

The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adma.202204800.

Endowing Porphyrinic Metal–Organic Frameworks with High Stability by a Linker Desymmetrization Strategy

“…16−18 To address this issue, different strategies have been developed to improve MOF stability, such as the incorporation of dangling hydrophobic groups, 19−21 creation of hydrophobic pore walls by post-synthetic modification, 22−24 hydrophobic surface treatment, 25−28 post-synthetic ion exchange, 29,30 composite material. 31,32 Although all these strategies are effective in improving MOF stability, unfortunately, in most cases, the intrinsic MOF porosity suffers from inevitable decreases to a certain degree due to the involvement of new components, which might give rise to compromised functionalities and properties. Moreover, some processes are complicated and not easy to be precisely controlled.…”

“…This solvent removal (also called activation) process sometimes causes framework collapse of MOFs due to their limited stability. In addition to stability concerns during activation, the coordination bonds in MOFs are usually vulnerable to moisture or acidic or alkaline aqueous solutions, which is detrimental to their real-world applications. − To address this issue, different strategies have been developed to improve MOF stability, such as the incorporation of dangling hydrophobic groups, − creation of hydrophobic pore walls by post-synthetic modification, − hydrophobic surface treatment, − post-synthetic ion exchange, , composite material. , Although all these strategies are effective in improving MOF stability, unfortunately, in most cases, the intrinsic MOF porosity suffers from inevitable decreases to a certain degree due to the involvement of new components, which might give rise to compromised functionalities and properties. Moreover, some processes are complicated and not easy to be precisely controlled.…”

Elastoplastic behavior of anisotropic, physically crosslinked hydrogel networks comprising stiff, charged fibrils in an electrolyte

“…CNFs, consisting of a semicrystalline ordered structure of glucan molecules, are the structural building blocks of trees and plants that form strong and self-supporting hydrogel networks at diminishing concentrations containing as much as 99.99% water. These low-density networks are enabled by the fibrils having a high affinity for water 22 , a high stiffness of ~100 GPa 24 , and a high aspect ratio of up to 800 25 . These properties result in volumespanning arrested states, also known as colloidal glasses or gels, if the concentration of these materials increases above a certain threshold or decreases the repulsive interactions between the materials.…”

“…These low-density networks are enabled by the fibrils having a high affinity for water, 22 a high stiffness of ∼100 GPa, 24 and a high aspect ratio of up to 800. 25 These properties result in volume-spanning arrested states, also known as colloidal glasses or gels, if the concentration of these materials increases above a certain threshold or decreases the repulsive interactions between the materials. 18 Upon water removal by filtration and subsequent drying, nanocellulose networks self-assemble into layered structures.…”

Interfacial engineered superelastic metal-organic framework aerogels with van-der-Waals barrier channels for nerve agents decomposition

“…based MOFs with infinite opportunities for ideal self-detoxifying PPE against nerve agents 11 . However, the inherent limitation of their natural powder form significantly hampers the development and application in emergency medical services, which is not the preferred configuration for PPE 12 . The assembly of MOF-derived textiles by coating 13 , layer-bylayer 14 , and hot pressing 15 has proven to be a reliable approach to utilize the desired characteristics of MOFs in protective clothing.…”