Adaptive healing of stress-induced dynamic cracks in a metal-organic framework membrane using nanoparticles

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Adaptive healing of stress-induced dynamic cracks in a metal-organic framework membrane using nanoparticles

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Schematic illustration of the PHICD and AHSDC concepts and comparisons between them. Credit: Science Advances (2024). DOI: 10.1126/sciadv.ado7331

Stress-induced cracks often lead to catastrophic ******** of materials. For membranes, stress loads concomitant with thermal and mechanical risks during separation will gradually produce cracks, which weaken the stability and reliability of membranes in long-term separation processes.

Recently, a research group led by Prof. Yang Weishen and Prof. Ban Yujie from the Dalian Institute of Chemical Physics (DICP) of the ******** Academy of Sciences proposed adaptive healing of stress-induced dynamic cracks (AHSDC) in a metal-organic framework membrane using nanoparticles. Their study was published in

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.

Traditional post ******-healing technologies, due to the spatiotemporal mismatch between ****** formation and ****** healing, lack point-by-point healing accuracy and result in a large healing zone, thus leading to increased membrane thickness and mass transfer resistance.

In this study, AHSDC was proposed to create spatiotemporal harmony between generation and healing of cracks. AHSDC leveraged risk factors to overcome the membrane’s tolerance limits and made stress-induced dynamic cracks fully exposed prior to separation. At the same time, it employed in situ formed nanoparticles in the same chemical environment to immediately fill ****** gaps once cracks formed in the membrane.

The research group proved that AHSDC could function with point-by-point accuracy and form adaptive healing zones with the ability of self-selecting their shapes according to peculiarities of cracks.

The membrane after AHSDC retained satisfactory separation performances for azeotropic mixtures with energy consumption saved by approximately 85%. Additionally, the separation durability was improved by at least two orders of magnitude.

More information:
Yuecheng Wang et al, Adaptive healing of stress-induced dynamic cracks in a metal-organic framework membrane using nanoparticles, Science Advances (2024).

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Citation:
Adaptive healing of stress-induced dynamic cracks in a metal-organic framework membrane using nanoparticles (2024, September 12)
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#Adaptive #healing #stressinduced #dynamic #cracks #metalorganic #framework #membrane #nanoparticles

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