Abstract Homoporous membranes are promising for size-sieving filtration, but their prospect is restricted by the lack in mechanical strength. A facile and low-cost route based on in situ breath figure and thermal adhesion method is proposed to fabricate the reinforced homoporous MF membranes in this research. The substrates specific to this route are fabricated by PVDF coating and then ice sealing on nonwoven fabrics. On the tailor-made substrates, the porous film is formed as usual by the breath figure method, and then immobilized on the substrate conveniently by PVDF melting. Acetone is introduced into the casting solution with intent to accelerate solution spreading on ice surface and facilitate micron-scale water droplets floating down to the solution film, so that the resistance layer could be formed thinner and abundant in perforated pores to attain high water permeation flux. Four usually used homoporous membrane materials, i.e., PSF, PES, PPO and PEI, have succeeded in membrane fabrication. FE-SEM images reveal that membrane pores are perforated and homogeneous with controllable size, again the homoporous layer is tightly adhered on substrate. Water permeation, particle sieving and regeneration tests indicate that the reinforced homoporous membranes made by this novel method are practicable for high-resolution separation under moderate pressure and long-time service.

中文翻译：

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通过原位呼吸图和热粘附方法在基材上轻松制造增强型均质 MF 膜

摘要 均孔膜在筛分过滤方面具有广阔的应用前景，但其机械强度不足限制了其应用前景。在本研究中，提出了一种基于原位呼吸图和热粘附方法的简便且低成本的路线来制造增强的均质 MF 膜。特定于这条路线的基材是通过 PVDF 涂层制造的，然后在无纺布上进行冰封。在特制的基材上，通过呼吸图法形成多孔薄膜，然后通过PVDF熔化方便地固定在基材上。将丙酮引入浇铸溶液中，目的是加速溶液在冰面上的扩散，并促进微米级水滴向下漂浮到溶液膜上，从而使阻力层形成得更薄、孔洞丰富，以达到高透水通量。四种常用的均质膜材料，即 PSF、PES、PPO 和 PEI，已成功用于制膜。FE-SEM 图像显示膜孔是穿孔且均质的，尺寸可控，同样，均质层紧密粘附在基材上。水渗透、粒子筛分和再生试验表明，采用这种新方法制备的增强型均孔膜在中等压力和长时间使用下的高分辨率分离是可行的。FE-SEM 图像显示膜孔是穿孔且均质的，尺寸可控，同样，均质层紧密粘附在基材上。水渗透、粒子筛分和再生试验表明，采用这种新方法制备的增强型均孔膜在中等压力和长时间使用下的高分辨率分离是可行的。FE-SEM 图像显示膜孔是穿孔且均质的，尺寸可控，同样，均质层紧密粘附在基材上。水渗透、粒子筛分和再生试验表明，采用这种新方法制备的增强型均孔膜在中等压力和长时间使用下的高分辨率分离是可行的。