Engineering Morphological Architecture for Next-Gen Photothermal Membrane Distillation
Morphological Architecture Engineering
The study demonstrates how carefully engineered morphological architecture can simultaneously reduce mass transfer resistance, enhance photothermal energy utilization, and maintain strong water-repellency. The multilayer configuration ensures heat localization and structural integrity while avoiding delamination, a common challenge in composite membrane systems. This architectural approach represents a critical advancement in functional membrane design.
Innovative Fabrication Techniques
The membrane was fabricated through a one-step programmed dual-channel electrospinning method combined with an electrostatic spraying technique. This strategy enabled the construction of a three-tier system: a hydrophilic supporting layer for water intrusion, a thin hydrophobic interlayer, and an ultrathin superhydrophobic MXene-based surface layer. Such fabrication methods illustrate the potential of advanced nanostructuring and hybrid materia
l integration for next-generation PMD membranes.
Superior Flux and Solar Efficiency
The engineered membrane, designated DS15-M, achieved remarkable water fluxes of 1.27 L m−2 h−1 under ambient feed/permeate conditions (20/20 °C) and 15.89 L m−2 h−1 under elevated conditions (50/20 °C). Alongside, it displayed high solar efficiencies of 76.34% and 96.45% under 1.0 kW m−2 irradiation. These results highlight the capability of morphological architecture in significantly improving PMD performance metrics.
Robust Wetting Resistance and Stability
Wetting resistance and operational consistency are vital for the long-term performance of PMD membranes. The DS15-M showcased excellent resistance against wetting and sustained stable performance over extended operation. Moreover, the unique multilayer design mitigated temperature polarization effects, which are often detrimental to efficiency in conventional PMD systems. Such stability is crucial for scaling up to real-world desalination applications.
Research Implications and Future Outlook
This research underscores the pivotal role of morphological architecture in advancing PMD technology. By integrating material science, nanotechnology, and membrane engineering, it paves the way for more sustainable and efficient desalination systems. Future work could expand on scaling, cost optimization, and field testing to translate laboratory breakthroughs into practical water purification solutions capable of addressing global water scarcity challenges.
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