An acid-stable positively charged polysulfonamide nanofiltration membrane prepared by interfacial polymerization of polyallylamine and 1,3-benzenedisulfonyl chloride for water treatment

Abstract

Here, an acid stable PSA membrane with positively charge was prepared through the IP between macromolecular PAH and BDSC on PES substrate. In addition, the PSA membrane exhibited excellent separation performance to divalent metal ions.

Positively Charged Polysulfonamide Nanocomposite Membranes Incorporating Hydrophilic Triazine-Structured COFs for Highly Efficient Nanofiltration

“…In general, a high S/N ratio indicated a high reaction degree between the amine and sulfonyl chloride groups. 8,33 Table 1 shows that the S/N ratios for the NENP-1-PSA/PES nanocomposite membranes were in the following order: N-1 > N-2 > N-3 > N-0 > N-4 > N-5. These results were attributed to the reaction between the −NH 2 groups of NENP-1 and sulfonyl chloride groups in the IP process, which formed covalent bonds.…”

“…The X-ray photoelectron spectroscopy (XPS) measurements were performed on a Kratos Axis Ultra DLD spectrometer (Kratos Analytical-A Shimadzu Group Company). 8 Furthermore, the elemental peaks were fitted using MKSX server software. The elemental concentration was measured by an atomic absorption spectrophotometer (AAS-6300, Shimadzu, Japan).…”

“…The separation performance of the NF membrane was measured using a laboratory-made cross-flow flat membrane system at 0.5 MPa and room temperature. 8 The permeation fluxes (F, L/m 2 •h) and rejection rates (R, %) of the membranes were calculated as follows…”

“…7 To solve this problem, we reported a preparation of new positively charged polysulfonamide (PSA) membrane via interfacial polymerization (IP) between polyallylamine (PAH) and 1,3-benzenedisulfonyl dichloride (BDSC) that exhibited acid stability and high performances. 8 However, the separation performance of polymer membranes is limited by the trade-off effect between the rejection and permeation flux. 9 This can lead to high energy consumption and long-time consumption in the actual separation process of the polymer membrane.…”

Advances in thin-film composite membranes for demanding industrial conditions

“…57,58 Coating is another way to deposit a pH stable selective layer on a porous sup- for membranes that are prepared via the IP reaction between poly(allylamine hydrochloride) (PAH) with 1,3-benzenedisulfonyl chloride (BDSC) on a PES support. 65 On the other (solvent) side, by exchanging piperazine for 1,3,5-(trispiperazine)-triazine and reacting this with trimesoylchloride, also an improved acid stability can be obtained, compared to its traditional counterpart. 66 A powerful approach to improve the pH stability of IP derived membranes, in particular in the alkaline region, is to select monomers such that the final polymer network does not contain groups that are especially susceptible to hydrolysis.…”