Isoporous Membranes from Novel Polystyrene--poly(4-vinylpyridine)--poly(solketal methacrylate) (PS--P4VP--PSMA) Triblock Terpolymers and Their Post-Modification.

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ID: 74223
2019
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Abstract
In this paper, the formation of nanostructured triblock terpolymer polystyrene--poly(4-vinylpyridine)--poly(solketal methacrylate) (PS--P4VP--PSMA), polystyrene--poly(4-vinylpyridine)--poly(glyceryl methacrylate) (PS--P4VP--PGMA) membranes via block copolymer self-assembly followed by non-solvent-induced phase separation (SNIPS) is demonstrated. An increase in the hydrophilicity was observed after treatment of non-charged isoporous membranes from PS--P4VP--PSMA, through acidic hydrolysis of the hydrophobic poly(solketal methacrylate) PSMA block into a hydrophilic poly(glyceryl methacrylate) PGMA block, which contains two neighbored hydroxyl (-OH) groups per repeating unit. For the first time, PS--P4VP--PSMA triblock terpolymers with varying compositions were successfully synthesized by sequential living anionic polymerization. Composite membranes of PS--P4VP--PSMA and PS--P4VP--PGMA triblock terpolymers with ordered hexagonally packed cylindrical pores were developed. The morphology of the membranes was studied with scanning electron microscopy (SEM) and atomic force microscopy (AFM). PS--P4VP--PSMA triblock terpolymer membranes were further treated with acid (1 M HCl) to get polystyrene--poly(4-vinylpyridine)--poly(glyceryl methacrylate) (PS--P4VP--PGMA). Notably, the pristine porous membrane structure could be maintained even after acidic hydrolysis. It was found that membranes containing hydroxyl groups (PS--P4VP--PGMA) show a stable and higher water permeance than membranes without hydroxyl groups (PS--P4VP--PSMA), what is due to the increase in hydrophilicity. The membrane properties were analyzed further by contact angle, protein retention, and adsorption measurements.
Reference Key
saleem2019isoporouspolymers Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Saleem, Sarah;Rangou, Sofia;Abetz, Clarissa;Filiz, Volkan;Abetz, Volker;
Journal Polymers
Year 2019
DOI
E41
URL
Keywords
self-assembly acidic hydrolysis isoporous membrane non-solvent-induced phase separation (nips), ultrafiltration triblock terpolymer lipid profile antioxidant status buckwheat bread enrichment gluten free bread

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