Synthesis of Polysulfone Based Amphiphilic Graft Copolymers by a ‘Grafting to’ Approach

Çiftçi, Mustafa

doi:10.18596/jotcsa.606191

Cited by 1 publication

(1 citation statement)

References 43 publications

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“…As a result, greater water uptakes in the PSU matrix indicate that the structure has more sulfone groups, which are distributed more uniformly throughout the polymer matrix. 41,42 In light of this information, the comparatively high elongation at break value observed in the sample generated with the TMSCS agent can be understood as the sample absorbing more water into its structure than other samples, resulting in more effective plasticization and consequently higher elongation values. TMSCS as a reagent for homogeneous and efficient sulfonation of PSU was therefore proven to be a good choice, as evidenced by FT-IR spectroscopy.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

Hydrophilicity and flux properties improvement of high performance polysulfone membranes via sulfonation and blending with Poly(lactic acid)

Tasci

Kaya

Celebi

2022

High Performance Polymers

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To achieve increased flow and reduce fouling, polymeric membranes can be functionalized with hydrophilic groups such as sulfone, amines, and others. This research has aimed at the sulfonation of Polysulfone (PSU) with various agents and at varying substitution degrees to change its hydrophobic character. PSU was also blended with Poly(lactic acid) (PLA), which is a more hydrophilic polymer. The phase inversion method was used to make PSU, PLA, sulfonated PSU, and PSU/PLA blend-based membranes. Sulfonation degrees of sulfonated PSU membranes were assessed using FT-IR, mechanical characteristics of membranes were determined, and thermal properties of membranes were clarified using DSC and TGA techniques. Hydrophilic natures and membrane alterations were investigated, as well as contact angle and water uptake measures. Among three distinct sulfonation agents (trimethylsilyl chlorosulfonate (TMSCS), sulfuric acid, and chlorosulfonic acid) employed to produce a 20% sulfonation degree of polysulfone, TMSCS was chosen as having the highest sulfonation efficiency (91.5%). With increasing sulfonation degree, a drop in molecular weight was seen in all sulfonated polysulfone samples. The mechanical strength values of polysulfone after sulfonation with TMSCS rose from 35.23 MPa to 63.35 MPa, while the contact angle value decreased from 85.58° to 71°. The contact angle value reduced from 85.58° to 64.68° while the mechanical strength of the PSU and PSU/PLA (50:50) blend increased from 35.23 MPa to 39.3 MPa. Membranes were also tested for pure water flux, hydrostability, and biostability. In terms of application requirements, it was determined that sulfonated PSU-based membranes manufactured with TMSCS with a 20% sulfonation degree and PSU/PLA blend-based membranes with a 50:50 (w:w) ratio have the optimum compositions with high flux quantities.

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Section: Mechanical Propertiesmentioning

confidence: 99%