	US 12,233,382 B2
	Efficient antifouling and hydrophilic polyethersulfone ultrafiltration membrane and preparation method thereof
Yongjin Li, Zhejiang (CN); Chunjun Ni, Zhejiang (CN); and Xin Zheng, Zhejiang (CN)
Assigned to HANGZHOU NORMAL UNIVERSITY, Zhejiang (CN)
Filed by HANGZHOU NORMAL UNIVERSITY, Zhejiang (CN)
Filed on Nov. 30, 2021, as Appl. No. 17/537,515.
Application 17/537,515 is a continuation of application No. PCT/CN2020/123403, filed on Oct. 23, 2020.
Claims priority of application No. 201911071284.2 (CN), filed on Nov. 5, 2019.
Prior Publication US 2022/0080367 A1, Mar. 17, 2022
Int. Cl. B01D 71/68 (2006.01); B01D 61/14 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01)

CPC B01D 71/68 (2013.01) [B01D 61/145 (2013.01); B01D 67/0011 (2013.01); B01D 67/0013 (2013.01); B01D 67/00165 (2022.08); B01D 67/00931 (2022.08); B01D 69/02 (2013.01); B01D 2323/08 (2013.01); B01D 2323/12 (2013.01); B01D 2323/34 (2013.01); B01D 2323/385 (2013.01); B01D 2325/36 (2013.01); B01D 2325/48 (2013.01)]

6 Claims

1. A preparation method of an efficient antifouling and hydrophilic polyethersulfone (PES) ultrafiltration membrane, the preparation method comprising steps of:

(1) obtaining a mixed solution by mixing a PES solution with an ionic liquid (IL) and a solvent according to a mass ratio in a reactor, wherein the mass ratio of the ionic liquid to the PES solution is in a range of (2-11): 100, the ionic liquid is an ionic liquid containing unsaturated bonds;

(2) obtaining a mixed PES/IL blend film by casting the mixed solution, followed by removing the solvent by drying;

(3) obtaining an IL grafted PES (PES-g-IL) film by performing radiation on the mixed PES/IL blend film in a polyethylene plastic bag, wherein the radiation is ⁶⁰Co-γ radiation at room temperature in air or nitrogen environment with a radiation dose of 30 kGy; and

(4) preparing the PES-g-IL film into a solution, and obtaining a PES-g-IL porous membrane from the solution through immersion-precipitation phase inversion method.