One-pot fabrication of SF-DA@PVDF membrane for dye adsorption and oil-in-water emulsion separation

Zhou, Peng; Zhang, Shihong; He, Yi; Wu, Jingcheng; Zhou, Liang; Yin, Xiangying; Tian, Shuting; Li, Shuangshuang; Chen, Wen

doi:10.1016/j.jece.2023.109730

Cited by 3 publications

(1 citation statement)

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“…Superhydrophilicsuperoleophobic membrane is a kind of water-independent membrane material. During the course of oil/water separation, this kind of film is easy to form a hydration layer at the water/film interface, which can prevent oil infiltration on the surface of the film or film surface deposition and has a certain anti-fouling and efficient separation of oil and water mixture ability [5]. The cation interaction in PDA makes the surface of PVDF membrane highly hydrophilic, and PDA is rich in hydroxyl groups, making it difficult for oil droplets to accumulate on the surface, thereby improving the durability of the membrane.…”

Section: Introductionmentioning

confidence: 99%

Superhydrophilic polymer coatings based on PVDF membranes for oil-water separation

Ding

Xia

et al. 2023

E3S Web of Conf.

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Recently, the excellent anti-pollution performance of superhydrophilic membrane has attracted much attention in the field of wastewater treatment and oil-water separationIn. At present, the widely used commercial membrane materials have good pore structure and mechanical properties, but most of the commercial membranes are hydrophobic, so a simple, environmentally friendly and universal method is urgently needed to change its hydrophobic membrane to superhydrophilic membrane. In this paper, tannic acid (TA, natural plant polyphenols) and polydopamine (PDA) were used to build an anti-stain coating. The synthesized hydrophilic polymer containing polyphenols crosslinks with the base layer through hydrogen bonding, π-π and Michael addition. After the modified PVDF membrane is moistened by water, the superhydrophilic polymer network on the surface binds the water to form a stable hydration layer, showing the superhydrophilic/underwater superhydrophobic properties. The wettability of the modified film in air and water was investigated. The contact Angle of the modified separation membrane prepared in this paper is more than 150°, and the separation efficiency exceeded 98%. The good flux and efficiency can be maintained after 5 cycles, and it is found that the membrane has a certain anti-protein adsorption capacity. The modified membrane has high separation flux and excellent reuse, and has great uses in other ways.

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Section: Introductionmentioning

confidence: 99%