Surface immobilization of polymer brushes onto porous poly(vinylidene fluoride) membrane by electron beam to improve the hydrophilicity and fouling resistance

Liu, Fu; Du, Chun‐Hui; Zhu, Bao‐Ku; Xu, Yuan

doi:10.1016/j.polymer.2007.03.033

Cited by 156 publications

(99 citation statements)

References 41 publications

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“…For this purpose, reactive groups need to be first introduced on the membrane surface by either introducing initiator sites 59,60 or exposing the membrane to low-temperature plasma, 61,62 ultraviolet, 63 g-ray 64 or electron beam radiation. 65 The surface-grafted polymer can be grown by either 'grafting to' or 'grafting from' approaches. 22 Both approaches can generate a dense brush layer on the membrane surface.…”

Section: Surface Modificationmentioning

confidence: 99%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

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The separation of oily wastewater, especially emulsified oil/water mixtures, is a worldwide challenge because of the large amount of oily wastewater produced in many industrial processes and daily life. For the treatment of oily wastewater, membrane technology is considered the most efficient method because of its high separation efficiency and relatively simple operational process. In this short review, the recent development of advanced filtration membranes for emulsified oil/water mixture separation is presented. We provide an overview on both traditional filtration membranes, including polymer-dominated and ceramic-based filtration membranes, and recently developed nanomaterial-based functional filtration membranes, especially one-dimensional nanomaterials, for effectively treating emulsified oil/water mixtures. The liquid flux and antifouling property, which are the most important factors for membrane performance evaluation, are described for different types of membranes. Conclusions and perspectives concerning the future development of filtration membranes are also provided.

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Section: Surface Modificationmentioning

confidence: 99%

Recent progress in developing advanced membranes for emulsified oil/water separation

2014

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“…However, PVDF is a hydrophobic polymer without any functional groups to promote cell adhesion on surface. Therefore, surface modification was widely applied to PVDF membranes to extend their applications as biomaterials [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Surface characteristics and blood compatibility of PVDF/PMMA membranes

Wang

et al. 2012

J Mater Sci

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Poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) membranes have important applications as biomaterials. In this study, PVDF/PMMA with varying ratios is blown into membranes, the surface property and blood compatibility of which are thoroughly investigated. Membrane surface characteristics including composition and topography exert considerable influence on the blood compatibility. Introduction of PMMA disturbs PVDF crystallization, however, favors the b phase crystal formation. PVDF content, crystallization ability, and surface enrichment have decisive effects on the membrane surface composition. Meanwhile, with increased PMMA fraction, the membrane surface roughness is also increased, and subsequently results in decreased hemocompatibility. While the membranes with PMMA content lower than 30 wt% show good blood compatibility, those with higher PMMA fraction exhibit obvious platelet adhesion to the surface. Thermal annealing promotes the formation of b phase PVDF and generates much smoother surface, thus endowing the membranes with greatly enhanced blood compatibility. These results show the prospect for optimization of processability, surface property, and blood compatibility of PVDF/PMMA membranes through facile modulation of PMMA content and fabrication process.

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“…In recent years, various techniques have been tried to improve the wettability of PVDF materials, such as plasma treatment, iron irradiation and sputter coating [6,7]. In these modifications, plasmainduced graft polymerization of vinyl monomers has been found to be an extremely attractive technique for chemically modifying the surfaces of polymeric materials [8].…”

Section: Introductionmentioning

confidence: 99%

Dynamic wettability and contact angles of poly(vinylidene fluoride) nanofiber membranes grafted with acrylic acid

Huang¹,

Wang²,

Wei³

et al. 2010

Express Polym. Lett.

120

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Abstract. Wettability has been recognized as one of the most important properties of fibrous materials for both fundamental and practical applications. In this study, the plasma induced grafting of acrylic acid (AAc) was applied to improve the wettability of the electrospun poly(vinylidene fluoride) (PVDF) nanofiber membranes. The diameter and chemical structure of the modified PVDF nanofibers were characterized by scanning electron microscopy (SEM) and Fourier transform infrared (FTIR). Nitrogen adsorption based on BET (Brunauer, Emmett and Teller) principle was employed to measure the specific surface areas and porosities of the modified nanofiber membrances. The contact angles of the modified membrane were evaluated by drop shape analysis (DSA) and the modified Washburn method. The dependence of contact angles on specific surface area and porosity was also discussed in this paper. Water adsorptions were used to evaluate the dynamic wetting behavior of the grafted membranes by a dynamic adsorption apparatus (CDCA100-F). The experimental results revealed that the wettablity of the modified PVDF membrane was significantly affected by both surface and porous contact angles.

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Surface immobilization of polymer brushes onto porous poly(vinylidene fluoride) membrane by electron beam to improve the hydrophilicity and fouling resistance

Cited by 156 publications

References 41 publications

Recent progress in developing advanced membranes for emulsified oil/water separation

Recent progress in developing advanced membranes for emulsified oil/water separation

Surface characteristics and blood compatibility of PVDF/PMMA membranes

Dynamic wettability and contact angles of poly(vinylidene fluoride) nanofiber membranes grafted with acrylic acid

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