EMAIL THIS PAGE TO A FRIEND

ACS applied materials & interfaces

Amine Enrichment of Thin-Film Composite Membranes via Low Pressure Plasma Polymerization for Antimicrobial Adhesion.


PMID 26083007

Abstract

Thin-film composite membranes, primarily based on poly(amide) (PA) semipermeable materials, are nowadays the dominant technology used in pressure driven water desalination systems. Despite offering superior water permeation and salt selectivity, their surface properties, such as their charge and roughness, cannot be extensively tuned due to the intrinsic fabrication process of the membranes by interfacial polymerization. The alteration of these properties would lead to a better control of the materials surface zeta potential, which is critical to finely tune selectivity and enhance the membrane materials stability when exposed to complex industrial waste streams. Low pressure plasma was employed to introduce amine functionalities onto the PA surface of commercially available thin-film composite (TFC) membranes. Morphological changes after plasma polymerization were analyzed by SEM and AFM, and average surface roughness decreased by 29%. Amine enrichment provided isoelectric point changes from pH 3.7 to 5.2 for 5 to 15 min of plasma polymerization time. Synchrotron FTIR mappings of the amine-modified surface indicated the addition of a discrete 60 nm film to the PA layer. Furthermore, metal affinity was confirmed by the enhanced binding of silver to the modified surface, supported by an increased antimicrobial functionality with demonstrable elimination of E. coli growth. Essential salt rejection was shown minimally compromised for faster polymerization processes. Plasma polymerization is therefore a viable route to producing functional amine enriched thin-film composite PA membrane surfaces.

Related Materials

Product #

Image

Description

Molecular Formula

Add to Cart

235466
1-Vinylimidazole, ≥99%
C5H6N2
263230
Germanium, chips, 99.999% trace metals basis
Ge
203343
Germanium, chips, 99.999% trace metals basis
Ge
327395
Germanium, powder, −100 mesh, ≥99.999% trace metals basis
Ge
203351
Germanium, powder, −100 mesh, ≥99.99% trace metals basis
Ge
GF58081451
Germanium, sheet, 50x50mm, thickness 3.0mm, polycrystalline, 99.999%
Ge
GF99720647
Germanium, sheet, 50x50mm, thickness 1.0mm, polycrystalline, 99.999%
Ge
GF31896366
Germanium, sheet, 7x24mm, thickness 1.0mm, polycrystalline, 99.999%
Ge
GF46650090
Germanium, disks, 15mm, thickness 1.0mm, polycrystalline, 100%
Ge
GF90754858
Germanium, disks, 20mm, thickness 1.0mm, single crystal, 100%
Ge
GF77697680
Germanium, microfoil, 25x25mm, thinness 0.25μm, specific density 166.3μg/cm2, 6 micron aluminum permanent support, 100%
Ge
GF58880739
Germanium, microfoil, 25x25mm, thinness 0.5μm, specific density 333μg/cm2, 6 micron aluminum permanent support, 100%
Ge
GF12210624
Germanium, microfoil, 50x50mm, thinness 0.25μm, specific density 166.3μg/cm2, 6 micron aluminum permanent support, 100%
Ge
GF57527219
Germanium, rod, 25mm, diameter 2.0mm, polycrystalline, n-type, 99.999%
Ge
GF65029417
Germanium, rod, 25mm, diameter 5mm, polycrystalline, n-type, 99.999%
Ge
GF14446346
Germanium, rod, 50mm, diameter 5mm, polycrystalline, n-type, 99.999%
Ge
GF04605780
Germanium, rod, 6mm, diameter 6.0mm, single crystal, 100%
Ge
GF09210417
Germanium, sheet, 10x10mm, thickness 0.10mm, polycrystalline, 99.999%
Ge
GF00633664
Germanium, sheet, 10x10mm, thickness 0.25mm, polycrystalline, 99.999%
Ge
GF09629859
Germanium, sheet, 10x10mm, thickness 0.5mm, single crystal, -111, 100%
Ge
GF45727241
Germanium, sheet, 10x10mm, thickness 0.6mm, single crystal, -111, 100%
Ge
GF44621580
Germanium, sheet, 25x25mm, thickness 1.0mm, polycrystalline, 99.999%
Ge
GF44356978
Germanium, sheet, 25x25mm, thickness 1.0mm, single crystal, 99.999%
Ge
GF20558022
Germanium, sheet, 25x25mm, thickness 3.0mm, polycrystalline, 99.999%
Ge
GF49319815
Germanium, sheet, 4x4mm, thickness 0.05mm, polycrystalline, 99.999%
Ge
GF73619107
Germanium, sheet, 50x50mm, thickness 0.5mm, single crystal, 99.999%
Ge
GF37208369
Germanium, sheet, 6x6mm, thickness 1.0mm, polycrystalline, 99.999%
Ge