Fabrication of Poly(amide-co-ester) Solvent Resistant Nanofiltration Membrane from P-nitrophenol and Trimethyl Chloride via Interfacial Polymerization

Abstract

P-nitrophenol (PNP), a refractory hazardous substance, has not been efficiently utilized so far. In this paper, PNP is used as a membrane modification material for preparing poly(amide-co-ester) composite nanofiltration membrane. An organic solvent nanofiltration (OSN) membrane was prepared via interfacial polymerization reactionby using PNP and trimethyl chloride (TMC) on a ethylenediamine (EDA) crosslinked polyetherimide substrate. The results of ATR-FTIR and XPS show that interfacial polymerization occurs among with PNP and TMC and the terminal amine groups on the ethylenediamine crosslinked -PEI support forming a poly(amide-co-ester) toplayer. The NF-1PNP membrane maintained stable DMF performance permeance of 2.2 L m−2 h−1 bar−1 and rejection of 98% for Rose Bengal red (RB 1017.64 g mol−1) in 36 h continuous separation process. Furthermore, the average pore diameter of the two membranes including NF-1PNP and NF-1.25PNP, which is 0.40 and 0.36nm, respectively. This study not only provides a good way for the preparation of OSN membrane, but also provides a good demonstration for the comprehensive utilization of PNP and other toxic and harmful pollutants.

Electrophoretic Deposition as a Versatile Low-Cost Tool to Construct a Synthetic Polymeric Solid-Electrolyte Interphase on Silicon Anodes: A Model System Investigation

“…Fitting of the high-resolution C 1s , N 1s , and O 1s spectra of as-purchased chitosan powder, Si/Chit, and Si/Chit+CH 3 COOLi are shown in Figure ; overlays of the C 1s , N 1s , O 1s , and Si 2p binding energy regions are provided in Figure S10 for visual comparison of the sample spectra. The C 1s of the chitosan powder (Figure a) can be fitted with three peaks representing C–C, C–H, and C–N bonds at about 285.50 eV, C–O (OH/OR) bond at 286.75 eV, and (O–C–O, N–C=O) bonds at 287.90 eV. − The same three peaks are observed in the C 1s spectra of the EPD films (Figure b,c), with an additional peak at 289.22 eV. This peak at 289.22 eV marks the presence of carboxylate (O–C=O) groups in the EPD films. , The slight peak shift of the C–O bond to the lower binding energy seen in both EPD films is attributed to the fragmentation of chitosan polymer chains in the acidic precursor, where the glycosidic linkages break and develop more C–OH bonds …”

“…The C 1s of the chitosan powder (Figure a) can be fitted with three peaks representing C–C, C–H, and C–N bonds at about 285.50 eV, C–O (OH/OR) bond at 286.75 eV, and (O–C–O, N–C=O) bonds at 287.90 eV. − The same three peaks are observed in the C 1s spectra of the EPD films (Figure b,c), with an additional peak at 289.22 eV. This peak at 289.22 eV marks the presence of carboxylate (O–C=O) groups in the EPD films. , The slight peak shift of the C–O bond to the lower binding energy seen in both EPD films is attributed to the fragmentation of chitosan polymer chains in the acidic precursor, where the glycosidic linkages break and develop more C–OH bonds Table shows the relative ratio of bonds in the C 1s region normalized to C–O bonds present in each of the three samples.…”

Multifunctional cotton fabrics with novel antibacterial coatings based on chitosan nanocapsules and polyacrylate

“…Also, it confirms the presence of CNs on the cotton fabric's surface due to the N 1s XPS spectra at 399.8 eV (N–C=O bonds), 401 eV (C–NH–C bonds), and 398.5 eV (C–NH 2 bonds). 32 – 34 Moreover, the XPS signal intensity at 288.6 eV (O–C=O bonds, C 1s region) and 534.3 eV (O–C=O bonds, O 1s region) from ester linkages is a contribution of the OH groups on cellulose chains reactions with the carboxylic acids on polyacrylate responsible for the CNs fixation on the cotton fibers’ surface.…”