3D printed composite membranes with enhanced anti-fouling behaviour
3D printed composite membranes with enhanced anti-fouling behaviour
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DOI：
10.1016/j.memsci.2018.12.058
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发表时间：
2019-03-15
影响因子：
9.5
通讯作者：
Mattia, Davide
中科院分区：
文献类型：
--
作者：
Al-Shimmery, Abouther;Mazinani, Saeed;Mattia, Davide
本文首次提出了通过将薄的聚醚砜（PES）选择性层沉积到ABS样3D打印的平坦和波状结构支撑体上来制造三维（3D）打印复合膜。使用工业3D打印机打印具有平坦和双正弦（即波浪）表面结构的50 mm盘支撑件。通过真空过滤将薄的选择性层沉积到3D载体上。通过在1巴的恒定跨膜压力下通过错流（雷诺数，Re = 100、500和1000）超滤装置过滤0.3-0.5体积%的水包油乳液，对所得的平坦和波状复合膜的渗透性、截留率和可清洁性进行表征和测试。结果表明，对于Re - 1000，纯水通过波浪膜的渗透率比平膜高30%。在第一次过滤循环后，波浪形3D打印膜的渗透率恢复率比平坦膜高52%，两种膜的吸油率均为96% +/-3%。波浪形3D复合膜在仅使用水作为清洁/冲洗剂的5个完整的过滤循环后保持一定水平的渗透，而平坦的复合膜在第一个循环后完全结垢。在第六次循环后用NaOCl清洗恢复了类似于波形膜的初始渗透率的70%。这些结果表明，3D打印的波形复合膜可用于显著改善渗透和清洁性能，特别是在减少污垢积累方面，即限制膜在工业应用中更广泛采用的主要障碍。
The fabrication of three dimensional (3D) printed composite membranes by depositing a thin polyethersulfone (PES) selective layer onto ABS-like 3D printed flat and wavy structured supports is presented here for the first time. The 50 mm disk supports were printed using an industrial 3D printer with both flat and double sinusoidal, i.e. wavy, surface structures. The thin selective layers were deposited onto the 3D supports via vacuum filtration. The resulting flat and wavy composite membranes were characterised and tested in terms of permeance, rejection, and cleanability by filtering oil-in-water emulsions of 0.3-0.5 vol% through a cross-flow (Reynolds number, Re = 100, 500 and 1000) ultrafiltration set-up under a constant transmembrane pressure of 1 bar. Results showed that pure water permeance through the wavy membrane was 30% higher than the flat membrane for Re - 1000. The wavy 3D printed membrane had a 52% higher permeance recovery ratio compared to the flat one after the first filtration cycle, with both membranes having an oil rejection of 96% +/- 3%. The wavy 3D composite membrane maintained some level of permeation after 5 complete filtration cycles using only water as the cleaning/rinsing agent, whereas the flat one was completely fouled after the first cycle. Cleaning with NaOCl after the sixth cycle restored similar to 70% of the initial permeance for the wavy membrane. These results demonstrate that 3D printed wavy composite membranes can be used to significantly improve permeation and cleanability performance, particularly in terms of reducing fouling build-up, i.e. the main obstacle limiting more widespread adoption of membranes in industrial applications.