Enhanced hydrophilicity and antifouling performance of PES-C/emodin ultrafiltration membrane

Abstract

In this article, an ultrafiltration membrane was fabricated from phenolphthalein polyethersulfone (PES-C) modified with emodin using a phase-inversion method. ATR-FTIR and UV-vis analysis showed that emodin had good compatibility with the PES-C ultrafiltration membrane. SEM showed that the prepared ultrafiltration membranes consisted of a porous skin layer and a macroporous support sublayer. The contact angle value of the pure PES-C ultrafiltration membrane was 77.71° and that of the PES-C ultrafiltration membrane blended with 0.105 wt.% emodin decreased to 65.71°, which explained the fact why its pure water flux significantly increased from 190 L/m2·h to 387 L/m2·h. The antifouling properties of the obtained ultrafiltration membranes were assessed by static protein adsorption, bacterial adhesion, antibacterial tests, and filtration experiments with BSA. The PES-C (13.895 wt.%)/emodin (0.105 wt.%) ultrafiltration membrane presented the lowest protein adsorption rate (1.44%), the highest flux recovery ratio (57%), and the largest inhibition zone diameter (3.0 ± 0.06 mm). Compared with that of the pure PES-C ultrafiltration membrane, the bacterial adhesion effect of the PES-C/emodin (0.105 wt.%) ultrafiltration membrane was significantly reduced. In addition, PES-C incorporated into the emodin ultrafiltration membrane had excellent stability in a deionized water system.

Purification Effect of PES-C Ultrafiltration Membrane Incorporated with Emodin on Acanthopanax Senticosus Injection

“…According to the preliminary experimental results [ 20 ], the best comprehensive performance of the prepared PES-C/emodin ultrafiltration membrane was as follows: filtration performance showed a water flux of 387.41 L∙m −2 ∙h −1 , and a rejection rate of 99.83%; Hydrophilic had a water content of 6.78%, and a contact angle of 65.71°; Anti-pollution performance had a flux recovery rate of 57.05%, and a BSA adsorption rate of 1.44% and the antibacterial diameter of 2.30 cm on S. aureus. Moreover, compared with the PES-C ultrafiltration membrane, the optimal PES-C/emoin ultrafiltration membrane significantly reduced bacterial adhesion.…”

“…Renal C (acanthopanax injection group rich in macromolecules): the glomerular epithelial cells distributed in the cortex had mild edema, the renal tubules had congestion, and there were infiltrated inflammatory cells and partial congestion in the interstitial cells. PES-C/emodin ultrafiltration membrane was prepared by the phase transformation method according to the previous experiment method [20]. A certain quality of PES-C was dissolved in a certain volume of N-methylpyrrolidone (NMP) solvent, and the mixture system was stirred at 75 °C for 3 h. After the temperature dropped to room temperature,…”

“…PES-C/emodin ultrafiltration membrane was prepared by the phase transformation method according to the previous experiment method [ 20 ]. A certain quality of PES-C was dissolved in a certain volume of N-methylpyrrolidone (NMP) solvent, and the mixture system was stirred at 75 °C for 3 h. After the temperature dropped to room temperature, an emodin of 0.015 wt.…”

A novel PES-C/(GO-COOH/Ce) blended membrane for treating heavy-metal-ion wastewater

“…However, as PES-C is a hydrophobic material, the holes in the fabricated membrane are easily blocked during the separation process, reducing the separation efficiency and service life of the separation membrane. 4 A separation membrane must be hydrophilically modified to reduce membrane fouling. Compared with surface grafting and surface coating, blending modification is more convenient and widely applied.…”