TY - JOUR
T1 - Printing-Assisted Surface Modifications of Patterned Ultrafiltration Membranes
AU - Wardrip, Nathaniel C.
AU - Dsouza, Melissa
AU - Urgun-Demirtas, Meltem
AU - Snyder, Seth W.
AU - Gilbert, Jack A.
AU - Arnusch, Christopher J.
N1 - Publisher Copyright:
© 2016 American Chemical Society.
PY - 2016/11/9
Y1 - 2016/11/9
N2 - Understanding and restricting microbial surface attachment will enhance wastewater treatment with membranes. We report a maskless lithographic patterning technique for the generation of patterned polymer coatings on ultrafiltration membranes. Polyethylene glycol, zwitterionic, or negatively charged hydrophilic polymer compositions in parallel- or perpendicular-striped patterns with respect to feed flow were evaluated using wastewater. Membrane fouling was dependent on the orientation and chemical composition of the coatings. Modifications reduced alpha diversity in the attached microbial community (Shannon indices decreased from 2.63 to 1.89) which nevertheless increased with filtration time. Sphingomonas species, which condition membrane surfaces and facilitate cellular adhesion, were depleted in all modified membranes. Microbial community structure was significantly different between control, different patterns, and different chemistries. This study broadens the tools for surface modification of membranes with polymer coatings and for understanding and optimization of antifouling surfaces.
AB - Understanding and restricting microbial surface attachment will enhance wastewater treatment with membranes. We report a maskless lithographic patterning technique for the generation of patterned polymer coatings on ultrafiltration membranes. Polyethylene glycol, zwitterionic, or negatively charged hydrophilic polymer compositions in parallel- or perpendicular-striped patterns with respect to feed flow were evaluated using wastewater. Membrane fouling was dependent on the orientation and chemical composition of the coatings. Modifications reduced alpha diversity in the attached microbial community (Shannon indices decreased from 2.63 to 1.89) which nevertheless increased with filtration time. Sphingomonas species, which condition membrane surfaces and facilitate cellular adhesion, were depleted in all modified membranes. Microbial community structure was significantly different between control, different patterns, and different chemistries. This study broadens the tools for surface modification of membranes with polymer coatings and for understanding and optimization of antifouling surfaces.
KW - 3D printing
KW - UV-initiated graft polymerization
KW - fouling
KW - maskless lithography
KW - microbial community analysis
KW - ultrafiltration membranes
UR - https://www.scopus.com/pages/publications/84994545279
U2 - 10.1021/acsami.6b11331
DO - 10.1021/acsami.6b11331
M3 - Article
AN - SCOPUS:84994545279
SN - 1944-8244
VL - 8
SP - 30271
EP - 30280
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 44
ER -