Patterned Hydrophilization of Nanoporous 1,2‐PB by Thiol‐ene Photochemistry

Berthold, Anton; Sagar, Kaushal Shashikant; Ndoni, Sokol

doi:10.1002/marc.201100243

Cited by 22 publications

(18 citation statements)

References 28 publications

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“…We previously reported that the originally hydrophobic membranes can be turned into hydrophilic via UV photooxidation 20 or thiolÀene photochemistry. 21 Water can spontaneously and exclusively fill the hydrophilized nanopores. As a result, the hydrophilized nanopores are permeable to the diffusing species in aqueous solutions, while no diffusion happens in the unmodified pores.…”

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confidence: 99%

Gyroid Nanoporous Membranes with Tunable Permeability

Li¹,

Schulte²,

Clausen³

et al. 2011

ACS Nano

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104

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Understanding the relevant permeability properties of ultrafiltration membranes is facilitated by using materials and procedures that allow a high degree of control on morphology and chemical composition. Here we present the first study on diffusion permeability through gyroid nanoporous cross-linked 1,2-polybutadiene (1,2-PB) membranes with uniform pores that, if needed, can be rendered hydrophilic. The gyroid porosity has the advantage of isotropic percolation with no need for structure prealignment. Closed (skin) or opened (nonskin) outer surface can be simply realized by altering the interface energy in the process of membrane fabrication. The morphology of the membranes' outer surface was investigated by scanning electron microscopy, contact angle, and X-ray photoelectron spectroscopy. The effective diffusion coefficient of glucose decreases from nonskin, to one-sided skin to two-sided skin membranes, much faster than expected by a naive resistance-in-series model; the flux through the two-sided skin membranes even increases with the membrane thickness. We propose a model that captures the physics behind the observed phenomena, as confirmed by flow visualization experiments. The chemistry of 1,2-PB nanoporous membranes can be controlled, for example, by hydrophilic patterning of the originally hydrophobic membranes, which allows for different active porosity toward aqueous solutions and, therefore, different permeability. The membrane selectivity is evaluated by comparing the effective diffusion coefficients of a series of antibiotics, proteins, and other biomolecules; solute permeation is discussed in terms of hindered diffusion. The combination of uniform bulk morphology, isotropically percolating porosity, controlled surface chemistry, and tunable permeability is distinctive for the presented gyroid nanoporous membranes.

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confidence: 99%

Gyroid Nanoporous Membranes with Tunable Permeability

Li¹,

Schulte²,

Clausen³

et al. 2011

ACS Nano

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104

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“…In the past few years, colossal advances have been made for the former strategy, due to the presence of highly active pendent vinyl substituents. [16][17][18][19][20][21][22] For instance, Mecking, Ndoni, et al, presented efficient functionalization of sPB via thiol-ene reaction, through which various types of functional groups, including ester, L-cysteine, carboxylic acid were successfully introduced; [23][24][25] Linford and Tang reported hydrosilation and hydrozirconation of 1,2-polybutadiene (1,2-PB) by Si-H and Zr-H reagents, and provided a platform for accessing diversied functional 1,2-PBs. 26,27 Despite of the facility and efficiency in these reports, all of them were built on the sacrice of pendent double bonds, which might cause irreversible damage to the inherent nature of sPB, such as crystallinity, 28 molecular weights, 16 and even causing cross-linking.…”

Section: Introductionmentioning

confidence: 99%

In-chain functionalized syndiotactic 1,2-polybutadiene by a Ziegler–Natta iron(iii) catalytic system

et al. 2019

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“…Another interesting strategy to change the surface chemistry of originally hydrophobic membranes has been recently proposed by Ndoni et al who were able to hydrophilize the nanopores of 1,2-PB membranes via UV-photooxidation [71] or thiol-ene photochemistry [72].…”

Section: Tunability Of Surface Propertiesmentioning

confidence: 99%

Self‐Assembled Nanoporous Membranes for Controlled Drug Release and Bioseparation

Scalarone¹,

Bracco²,

Trotta³

2014

Smart Membranes and Sensors

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Th is chapter highlights recent activity in the area of nanoporous membranes templated by block copolymers . Asymmetric composite membranes and standalone membranes , membranes templated by the cylindrical morphology and bicontinuous nanoporous structures are presented. Fabrication procedures of nanoporous membranes based on self-assembling block copolymers are described, as well as their transport properties and size-selectivity. Since membranes derived from block copolymers have accessible pore size approaching the size scale of biological components, focus is placed especially on applications for controlled release of drugs and eff ective separation of biomolecules.

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Patterned Hydrophilization of Nanoporous 1,2‐PB by Thiol‐ene Photochemistry

Cited by 22 publications

References 28 publications

Gyroid Nanoporous Membranes with Tunable Permeability

Gyroid Nanoporous Membranes with Tunable Permeability

In-chain functionalized syndiotactic 1,2-polybutadiene by a Ziegler–Natta iron(iii) catalytic system

Self‐Assembled Nanoporous Membranes for Controlled Drug Release and Bioseparation

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