膜科学与技术

Position：Home >> Abstract

Factors affecting the structure and properties of PVDF-PDA
blend ultrafiltration membranes

Authors： MIAO Rui, QU Jiani, WANG Siyu, WAN Jialin, FAN Li, WANG Lei

Units： 1. School of Environmental and Municipal Engineering, Northwest China Key Laboratory of Water Resources and Environment Ecology, Key Laboratory of Membrane Separation of Shaanxi Province, Xi’an University of Architecture and Technology, Xi’an 710055, China; 2. Research Institute of Membrane Seperation Technology of Shaanxi Province, Xi’an 710055, China

KeyWords： ultrafiltration membrane； polydopamine； oxidative auto polymerization； membrane performance

ClassificationCode：TQ028.4

year,volume(issue):pagination： 2025,45(5):42-50

Abstract：

In this study, polyvinylidene fluoride (PVDF)-polydopamine (PDA) blend ultrafiltration membranes were prepared via the immersion precipitation phase inversion method by dissolving dopamine (DA) in a PVDF casting solution with NaClO solution as the gelation bath. The results demonstrated that the formation rate of PDA in the blend membranes increased significantly with the increase of DA content, evaporation time and NaClO concentration. When the DA content in the casting solution reached 3% （mass fraction）, the evaporation time was 60 s, and the NaClO mass concentration was 20 mg/L, the PVDF-PDA blend membrane exhibited optimal comprehensive performance: its pure water flux increased by 95% compared to the pristine PVDF ultrafiltration membrane, the contact angle decreased from 81° to 48°, and the tensile strength improved from 2.7 MPa to 3.0 MPa. However, further increases in DA content or evaporation time intensified delayed phase separation, leading to microporous defects on the membrane surface and cross-section, which consequently reduced the tensile strength of the blend membrane. Notably, excessive NaClO concentration (>20 mg/L) damaged the PVDF matrix and severely compromised the structural integrity of the blend membrane.

Funds：

国家自然科学基金面上项目（52370049）; 陕西高校青年创新团队资助项目(2023-2026)

AuthorIntro：

苗瑞（1986-）,陕西榆林人,女, 博士,教授,主要从事膜法水处理技术研究

Reference：

[1]王宗恒, 于滨玮, 章小同, 等. 絮凝/陶瓷超滤组合工艺用于微污染地表水处理的中试研 [J]. 膜科学与技术, 2024, 44(5): 156-163.
[2]Lin Y C, Liu K M, Chao C M, et al. Enhanced anti-protein fouling of PVDF membrane via hydrophobic-hydrophobic adsorption of styrene-terminated amphiphilic linker[J]. Chem Eng Res Des, 2020, 156: 273-280.
[3]李玉懂, 张晶, 李妍妍, 等. 基于多巴胺亲水改性的聚丙烯中空纤维膜及油水分离性能研究[J]. 膜科学与技术, 2024, 44(5): 20-31.
[4]Xi Z Y, Xu Y Y, Zhu L P, et al. A facile method of surface modification for hydrophobic polymer membranes based on the adhesive behavior of poly(DOPA) and poly(dopamine)[J]. J Membr Sci, 2009, 327(1/2): 244-253.
[5]Yan Z, Zhang Y, Yang H, et al. Mussel-inspired polydopamine modification of polymeric membranes for the application of water and wastewater treatment: A review[J]. Chem Eng Res Des, 2020, 157: 195-214.
[6]Yang H C, Luo J, Lyu Y, et al. Surface engineering of polymer membranes via mussel-inspired chemistry [J]. J Membr Sci, 2015, 483: 42-59.
[7]Chen H, Li Y, Wang Q G, et al. Modified polyvinylidene fluoride ultrafiltration membrane coated with polydopamine/3-(2,3-epoxypropoxy) propyl triethoxy silane[J]. Polym Adv Technol, 2020, 32(4): 1597-1603.
[8]Yang H C, Waldman R Z, Wu M B, et al. Dopamine: Just the right medicine for membranes[J]. Adv Funct Mater, 2018, 28(8): 1705327.
[9]Rui M, Yue M, Xin Z, et al. One-step preparation of PVDF-polydopamine blend ultrafiltration membranes via nonsolvent-induced phase separation and their characterization and antifouling mechanism analysis[J]. J Membr Sci, 2025:124029.
[10]Liu Y, Zhou T, Yin G, et al. Membrane fouling mitigation in Anoxic-Oxic membrane bioreactor with carbon nanotube/dopamine modification[J]. J Water Process Eng, 2025, 71:107231.
[11]苗瑞, 王磊, 田丽, 等. 海藻酸及腐殖酸共存对PVDF超滤膜的污染行为[J]. 中国环境科学, 2014, 34(10): 2568-2574.
[12]Shah V, Prasetya N, Li K. Polydopamine modification of high-performance PVDF ultrafiltration membranes prepared by the combined crystallisation and diffusion (CCD) method[J]. J Membr Sci, 2021, 635: 119538.
[13]Kasemset S, Wang L, He Z, et al. Influence of polydopamine deposition conditions on hydraulic permeability, sieving coefficients, pore size and pore size distribution for a polysulfone ultrafiltration membrane[J]. J Membr Sci, 2017, 522: 100-115.
[14]Shao L, Wang Z X, Zhang Y L, et al. A facile strategy to enhance PVDF ultrafiltration membrane performance via self-polymerized polydopamine followed by hydrolysis of ammonium fluotitanate[J]. J Membr Sci, 2014, 461: 10-21.
[15]Zhang L, Cui Z, Hu M, et al. Preparation of PES/SPSf blend ultrafiltration membranes with high performance via H2O - induced gelation phase separation [J]. J Membr Sci, 2017, 540: 136-145.
[16]Zhu G D, Yin Y R, Li Z N, et al. Organic acids interacting with block copolymers have broadened the window that retains isoporous structures[J]. J Membr Sci, 2019, 582: 391-401.
[17]Wu Q, Xie W, Wu H, et al. Effect of volatile solvent and evaporation time on formation and performance of PVC/PVC-g-PEGMA blended membranes [J]. RSC Adv, 2019, 9(59): 34486-34495.
[18]Wang C, Ma Z, Qiu Y, et al. Patterned dense Janus membranes with simultaneously robust fouling, wetting and scaling resistance for membrane distillation[J]. Water Res, 2023, 242: 120308.
[19]Qiu Z, Lei T, Li S, et al. Insights into polymorphic transition of PVDF during nonsolvent-induced phase separation[J]. Macromolecules, 2024, 57(3): 1159-1168.
[20]Wang M, Huang Y W, Chen Y, et al. Poly(vinylidene fluoride) membranes fabricated by vapor-induced phase separation (VIPS) for the adsorption removal of VB12 from aqueous solution[J]. J Appl Polym Sci, 2019, 136(45): 48179.
[21]Wang Q, Zeng H, Wu Z, et al. Impact of sodium hypochlorite cleaning on the surface properties and performance of PVDF membranes[J]. Appl Surf Sci, 2018, 428: 289-295.

Service：

【Download】【Collect】

《膜科学与技术》编辑部 Address: Bluestar building, 19 east beisanhuan road, chaoyang district, Beijing; 100029 Postal code; Telephone：010-80492417/010-80485372; Fax：010-80485372 ; Email：mkxyjs@163.com