Membrane Protein-Based Biomimetic Membranes for Water Treatment | AIChE

Membrane Protein-Based Biomimetic Membranes for Water Treatment

Type

Conference Presentation

Conference Type

AIChE Annual Meeting

Presentation Date

November 15, 2021

Duration

15 minutes

Skill Level

Intermediate

PDHs

0.50

Biomimetic and bioinspired membranes (BBMs) containing MP channels and MP-mimic functionalized materials have emerged as innovative platforms to develop membrane-based separations and purification with specific solute selectivity [1]. BBMs, utilizing biological elements or mimicking concepts from biological mechanisms, can take advantage of processes evolved by nature for enhancing transport efficiency and specificity. The MP channels incorporated have well-organized and uniform inner pore diameters, generating a complete uniformity of pore size in BBMs, in direct contrast to the widely pore size distribution in current commercial membranes [2]. MP-based membranes demonstrate specific small solute selectivity and exhibit greater water permeability than commercial nanofiltration membranes with similar separation ranges [3]. This research is to explore affordable and sustainable solutions for creating tight MP-based membranes with fewer defects. We developed defect sealing strategies to fabricate BBMs with a single deposition step of MP-block copolymer (BCP) crystals combined with defect-filling materials, UV cross-linkable phospholipids-23:2 Diyne PC. The defect-sealed MP membranes demonstrate >7-log MS2 viral particle removal, exceeding 4-log removal suggested by US Environmental Protection Agency (EPA) for water treatment. We will further apply this fabrication process to create biomimetic membranes reconstituted with aquaporin channels for water desalination.

[1] Song, Tu, Oh, Samineni, and Kumar. "Hierarchical optimization of high-performance biomimetic and bioinspired membranes." Langmuir, 35, no. 3 (2018): 589-607.

[2] Tu, et al. “Prospective Applications of Nanometer-scale Pore Size Biomimetic and Bioinspired Membranes.” Journal of Membrane Science, (2020): 118968.

[3] Tu†, Song†, Ren†, et al. "Rapid fabrication of precise high-throughput filters from membrane protein nanosheets." Nature Materials, 19, no. 3 (2020): 347-354.

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