ArticleNature communications2022
Multimodal confined water dynamics in reverse osmosis polyamide membranes.
Article in Nature communications, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed.
- Correlated Polymer-Proton Hopping Enables Water-Independent Fast Proton Transport in Poly(Ionic Liquid) Membranes.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2026Article
- In Situ Ptychographic X-ray Computed Tomography of Fully Hydrated Polyamide Membranes.Langmuir : the ACS journal of surfaces and colloids · 2026Article
- Overcoming the trade-off in reverse osmosis membranes through homologous matching.Nature communications · 2026Article
- A fundamental mass transport model based on molecular insights for pervaporation desalination.Nature communications · 2025Article
- Bimodal Ionic Conduction through Polymer Films due to Nano Confinement.Angewandte Chemie (International ed. in English) · 2025Review
- Grazing Incidence Wide-Angle X-ray Scattering of Water Adsorption in Polyamide Barrier Layers of Reverse Osmosis Membranes.Macromolecules · 2025Article
- Article
- Multiscale modelling of transport in polymer-based reverse-osmosis/nanofiltration membranes: present and future.Discover nano · 2024Review
- Correlating the Diffusion of Water to Performance in Model Reverse Osmosis Polyamides with Controlled Crosslink Densities.Journal of membrane science · 2023Article
- Modular Software for Generating and Modeling Diverse Polymer Databases.Journal of chemical information and modeling · 2023Article
- Water transport in reverse osmosis membranes is governed by pore flow, not a solution-diffusion mechanism.Science advances · 2023Article
- Unlocking the potential of polymeric desalination membranes by understanding molecular-level interactions and transport mechanisms.Chemical science · 2023Review
Corrections and comments
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
While polyamide (PA) membranes are widespread in water purification and desalination by reverse osmosis, a molecular-level understanding of the dynamics of both confined water and polymer matrix remains elusive. Despite the dense hierarchical structure of PA membranes formed by interfacial polymerization, previous studies suggest that water diffusion remains largely unchanged with respect to bulk water. Here, we employ neutron spectroscopy to investigate PA membranes under precise hydration conditions, and a series of isotopic contrasts, to elucidate water transport and polymer relaxation, spanning ps-ns timescales, and Å-nm lengthscales. We experimentally resolve, for the first time, the multimodal diffusive nature of water in PA membranes: in addition to (slowed down) translational jump-diffusion, we observe a long-range and a localized mode, whose geometry and timescales we quantify. The PA matrix is also found to exhibit rotational relaxations commensurate with the nanoscale confinement observed in water diffusion. This comprehensive 'diffusion map' can anchor molecular and nanoscale simulations, and enable the predictive design of PA membranes with tuneable performance.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.