New type of nanofiltration membrane based on crosslinked hyperbranched polymers

Wei, Xiuzhen; Zhu, Liping; Deng, Huiyu; Xu, Yuan; Zhu, Bao‐Ku; Huang, Zhiming

doi:10.1016/j.memsci.2008.06.014

Cited by 86 publications

(24 citation statements)

References 32 publications

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“…It should be noted that the rejection of veterinary antibiotic happened dependent upon pore size and also surface charges, which improved the performance. The toxicological end point for tulathromycin is considered as greater than 20 mg/L . In this research, the concentration of this drug was reduced below this limit, which was not observed in any literature before.…”

Section: Resultsmentioning

confidence: 77%

“…When PAMAM dendrimers grew on the amidoximated UF membranes, the contact angle of membrane surface was reduced . Consequently, the pure water flux of these membranes increased from 89.1 for G0 to 130.7 L/m 2 ·h for G3 dendrimers‐coated UF membranes (Table ) .…”

Section: Resultsmentioning

confidence: 99%

“…Additionally, the fouling experiments were carried out for these membranes with this antibiotic to determine FRR, irreversible fouling ratio (IFR), and RFR. The analyses showed that when the generation of dendrimers was added from zero to 3, the amount of fouling decreased considerably (Figure ) . This result can be explained by Figure .…”

Section: Resultsmentioning

confidence: 99%

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Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Bojaran

Akbari

lehi

2019

Polymers for Advanced Techs

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Dendrimers have received more attention in all fields of research these days. In the present study, polyamidoamine (PAMAM) dendrimers were synthesized on the acrylic ultrafiltration membranes to minimize fouling as an important deficiency in the separation process. The antifouling activity of these dendrimers with different generations (G0‐3) was tested to restrict three macrolides (tylvalosin, tylosin, and tulathromycin) and two pleuromutilins (tiamulin and valnemulin) as veterinary antibiotic drugs with amine groups and positive charges at pH = 7 of the membrane surface. These compounds are risky for human consumption. Due to having several amine functional groups and branches, PAMAM dendrimers can be a great coating agent for antifouling. G3 PAMAM dendrimer‐coated membranes had the best performance (water flux: 130.7 L/m2·h, rejection of tulathromycin: 91.4%, flux recovery ratio: 86.3%). The function of this ultrafiltration process depended on pore size and also charge surface. A significant reduction for irreversible and reversible fouling was observed for this new ultrafiltration membrane (Fir: 14.5%, Fre: 21.9%). This observation was confirmed by the power law model. Three 5‐hour cycle ultrafiltration processes were carried out for veterinary antibiotic wastewater that showed 3.18% loss of initial water flux (for the third cycle), final cleaning efficiency of 96.82%, and tylvalosin rejection of 94.1%.

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Section: Resultsmentioning

confidence: 77%

Section: Resultsmentioning

confidence: 99%

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Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Bojaran

Akbari

lehi

2019

Polymers for Advanced Techs

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“…Membrane‐based water purification technologies have gained tremendous attention owing to their wide range of advantages in comparison with traditional separation methods . Compared to reverse osmosis, nanofiltration (NF) has significant advantages, such as a low‐operation pressure, higher permeate flux, high rejection of multivalent ion salts, and organic molecules above 300 Da, and relatively low investment and maintenance costs .…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance of a polyethersulfone nanofiltration membrane impregnated with a mesoporous silica–poly(1‐VInylpyrrolidone) nanocomposite

Huang

Shu

2015

Polymer Composites

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Fouling is a serious problem in the membrane formation process. Adding hydrophilic polymers or inorganic particles into the membrane is an effective way for improving the antifouling performance. However, most of the water‐soluble polymeric additives leach out during the phase inversion process, and the inorganic particles are prone to agglomerate in the membrane, which decreases the antifouling property of the membrane. In this study, poly(1‐vinylpyrrolidone) (PVP) was grafted onto mesoporous silica (MS) nanoparticle surface, and polyethersulfone (PES)/MS–PVP nanocomposite membranes were fabricated by the phase inversion method. MS–PVP dispersed well on the membrane surface, and the hydrophilicity of the PES/MS–PVP membranes increased with increasing content of MS–PVP. PES/MS–PVP membranes exhibited higher water flux than that of the bare PES membrane without any loss in NaCl rejection, and water flux of 25 L/m2h could be achieved by the membrane containing 3% of MS–PVP, which is almost 1.5 times as high as that of bare PES membrane at 0.6 MPa. The protein adsorption onto the membrane surface declined significantly from 49 to 25 mg/cm2 when the MS–PVP loading increased from 0% to 3%. POLYM. COMPOS., 38:908–917, 2017. © 2015 Society of Plastics Engineers

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“…Due to their architecture, HBP show a lower viscosity in melt and solution compared to their linear analogue and the rich amount of various functional groups offers a tuneable solubility in different solvents. Based on these advantages of HBP different applications have been suggested, for instance possible implementations of HBP are discussed in the field of medicine [1][2][3][4][5][6][7][8], catalysis [9][10][11][12][13], membrane materials [14][15][16][17][18][19][20], chemical engineering [21][22][23][24], sensors [25][26][27][28], thermosets [29][30][31] or as rheological modifier [32,33]. Polymeric drug delivery systems offer great opportunities to effectively control the drug release in human body [34][35][36][37][38][39][40][41][42][43][44].…”

Section: Introductionmentioning

confidence: 99%

Phase Diagrams for Systems Containing Hyperbranched Polymers

et al. 2012

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Abstract:Hyperbranched polymers show an outstanding potential for applications ranging from chemistry over nanotechnology to pharmacy. In order to take advantage of this potential, the underlying phase behaviour must be known. From the thermodynamic point of view, the modelling of these phase diagrams is quite challenging, because the thermodynamic properties depend on the architecture of the hyperbranched polymer as well as on the number and kind of present functional end groups. The influence of architecture can be taken into account via the lattice cluster theory (LCT) as an extension of the well-known Flory-Huggins theory. Whereas the Flory-Huggins theory is limited to linear polymer chains, the LCT can be applied to an arbitrary chain architecture. The number and the kind of functional groups can be handled via the Wertheim perturbation theory, applicable for directed forces between the functional groups and the surrounding solvent molecules. The combination of the LCT and the Wertheim theory can be established for the modelling or even prediction of the liquid-liquid equilibria (LLE) of polymer solutions in a single solvent or in a solvent mixture or polymer blends, where the polymer can have an arbitrary structure. The applied theory predicts large demixing regions for mixtures of linear polymers and hyperbranched polymers, as well as for mixtures made from two hyperbranched polymers. The introduction of empty lattice sites permits the theoretical investigation of pressure effects on phase behaviour. The calculated phase diagrams were compared with own experimental data or to experimental data taken from literature. OPEN ACCESSPolymers 2012, 4 73

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New type of nanofiltration membrane based on crosslinked hyperbranched polymers

Cited by 86 publications

References 32 publications

Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Fabrication and performance of a polyethersulfone nanofiltration membrane impregnated with a mesoporous silica–poly(1‐VInylpyrrolidone) nanocomposite

Phase Diagrams for Systems Containing Hyperbranched Polymers

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