Nano
            
              SiO
              2
            
            and
            
              TiO
              2
            
            embedded polyacrylonitrile/polyvinylidene fluoride ultrafiltration membranes: Improvement in flux and antifouling properties

In this study, polyvinylidene fluoride (PVDF) composite ultrafiltration membranes were prepared by a phase inversion method, N,N-dimethylacetamide (DMAc) was used as solvent and polyvinylpyrrolidone (PVP) was used as dispersant, nanoTiO2 and AgNO3 were used as addictive materials. With different doping content of nanoTiO2 and silver ions, those hybrid films have different functions and structure. The basic performance and photocatalytic properties of those ultrafiltration membranes were studied in detail. The experiment results show that adding nanosized TiO2 particles will make the porosity of PVDF membrane increase, adding silver ion with low content can not improve water flux and porosity of membranes, however, nanoTiO2 and silver ions doping together can effectively improve the photocatalytic degradation rate.

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Factorial design applied to flux decline of anionic polyacrylamide removal from water by modified polyvinylidene fluoride ultrafiltration membranes

Desalination ◽

10.1016/j.desal.2010.10.019 ◽

2011 ◽

Vol 274 (1-3) ◽

pp. 7-12 ◽

Cited By ~ 32

Author(s):

X.S. Yi ◽

W.X. Shi ◽

S.L. Yu ◽

X.H. Li ◽

N. Sun ◽

...

Keyword(s):

Factorial Design ◽

Polyvinylidene Fluoride ◽

Ultrafiltration Membranes ◽

Flux Decline ◽

Anionic Polyacrylamide

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Highly Hydrophilic Polyvinylidene Fluoride (PVDF) Ultrafiltration Membranes via Postfabrication Grafting of Surface-Tailored Silica Nanoparticles

ACS Applied Materials & Interfaces ◽

10.1021/am401462e ◽

2013 ◽

Vol 5 (14) ◽

pp. 6694-6703 ◽

Cited By ~ 203

Author(s):

Shuai Liang ◽

Yan Kang ◽

Alberto Tiraferri ◽

Emmanuel P. Giannelis ◽

Xia Huang ◽

...

Keyword(s):

Silica Nanoparticles ◽

Polyvinylidene Fluoride ◽

Ultrafiltration Membranes

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Organic fouling behavior of superhydrophilic polyvinylidene fluoride (PVDF) ultrafiltration membranes functionalized with surface-tailored nanoparticles: Implications for organic fouling in membrane bioreactors

Journal of Membrane Science ◽

10.1016/j.memsci.2014.03.037 ◽

2014 ◽

Vol 463 ◽

pp. 94-101 ◽

Cited By ~ 82

Author(s):

Shuai Liang ◽

Genggeng Qi ◽

Kang Xiao ◽

Jianyu Sun ◽

Emmanuel P. Giannelis ◽

...

Keyword(s):

Polyvinylidene Fluoride ◽

Membrane Bioreactors ◽

Ultrafiltration Membranes ◽

Organic Fouling

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Preparation and Characterization of BaBi2Nb2O9/PVDF Inorganic-Organic Composite Ultrafiltration Membranes

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.681.309 ◽

2013 ◽

Vol 681 ◽

pp. 309-313

Author(s):

Dong Hua Zhang ◽

Li Jing Pan ◽

Da Zhi Sun

Keyword(s):

Polyvinylidene Fluoride ◽

Pure Water ◽

Water Flux ◽

Composite Membranes ◽

Rejection Rate ◽

Inversion Method ◽

Ultrafiltration Membranes ◽

Cross Sectional ◽

Uf Membranes ◽

Phase Inversion Method

BaBi2Nb2O9/PVDF (polyvinylidene ﬂuoride) composite ultraﬁltration (UF)membranes were prepared by alloying BaBi2Nb2O9 (BBN) particles uniformly in the PVDF solution (15% polymer weight) and used a phase-inversion method. This paper studied the effect of the concentration of BBN from 0% to 5% in 0.2Mpa on pure water flux and rejection rate to Bovine serum albumin (BSA). The cross-sectional structures of composite membranes were observed by scanning electron microscopy (SEM). Moreover, XRD results revealed the crystal structure of PVDF. The experimental results showed that the BBN/PVDF composite ultraﬁltration membranes were superior in separation performances than the pure PVDF membranes due to the addition of BBN.

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