Hierarchically Porous Monolith with High MOF Accessibility and Strengthened Mechanical Properties using Water‐in‐Oil High Internal Phase Emulsion Template. Issue 15 (12th July 2021)

• Record Type: Journal Article
• Authors: Wang, Jierui; Qin, Jianliang; Zhu, He; Li, Bo‐Geng; Zhu, Shiping
• Is Part Of: Advanced materials interfaces. Volume 8:Issue 15(2021)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2021-07-12
• Subjects: high internal phase emulsion -- metal‐organic frameworks -- pickering emulsion template -- strengthening mechanical properties; Materials science -- Periodicals; 620.11
• DOI: 10.1002/admi.202100620
• Languages: English
• ISSNs: 2196-7350

Abstract

Abstract: High internal phase emulsion (HIPE) is a promising template for the construction of metal‐organic framework (MOF)‐based hierarchically porous monoliths. However, the current approaches still suffer from many issues, such as MOF embedment in polymer matrix and poor mechanical performance. In this work, a co‐stabilization strategy is employed to prepare water‐in‐oil HIPEs and the corresponding MOF‐based poly‐HIPEs. The effects of emulsifier concentration, type and volume of continuous oil phase, and type of initiator are thoroughly investigated. ZIF‐8 particles with size comparable to the thickness of the cellular wall are adopted to avoid the problem of MOF embedment. As a result, the obtained monolith shows enhanced mechanical properties and a hierarchically porous structure with ≈80% of ZIF‐8 accessible. Due to these unique features, the ZIF‐8‐based hierarchically porous monoliths exhibit greatly accelerated adsorption kinetics in iodine removal, showing great promise for future industrial applications. Abstract : High internal phase emulsion (HIPE) is a promising template for the construction of metal‐organic framework (MOF)‐based hierarchically porous monoliths. However, the current approaches still suffer from many issues, such as MOF embedment in polymer matrix and poor mechanical performance. Here, a co‐stabilization strategy is employed to prepare MOF stabilized water‐in‐oil HIPEs and the corresponding MOF‐based poly‐HIPEs to solve these problems.