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Organic-inorganic materials containing nanoparticles of zirconium hydrophosphate for baromembrane separation.

Dzyazko YS, Rozhdestvenskaya LM, Zmievskii YG, Vilenskii AI, Myronchuk VG, Kornienko LV, Vasilyuk SV, Tsyba NN - Nanoscale Res Lett (2015)

Bottom Line: The nanoparticles (4 to 10 nm) were found to form aggregates, which block pores of the polymer.Pores between the aggregates (4 to 8 nm) as well as considerable surface charge density provide significant transport numbers of counter ions (up to 0.86 for Na(+)).It was found that precipitate is formed mainly inside the pores of the pristine membrane.

View Article: PubMed Central - PubMed

Affiliation: Department of Sorption and Membrane Materials and Processes, V.I. Vernadskii Institute of General and Inorganic Chemistry, NASU, Palladin Pr. 32/34, 03142 Kiev, Ukraine.

ABSTRACT
Organic-inorganic membranes were obtained by stepwise modification of poly(ethyleneterephthalate) track membrane with nanoparticles of zirconium hydrophosphate. The modifier was inserted inside pores of the polymer, a size of which is 0.33 μm. Inner active layer was formed by this manner. Evolution of morphology and functional properties of the membranes were investigated using methods of porosimetry, potentiometry and electron microscopy. The nanoparticles (4 to 10 nm) were found to form aggregates, which block pores of the polymer. Pores between the aggregates (4 to 8 nm) as well as considerable surface charge density provide significant transport numbers of counter ions (up to 0.86 for Na(+)). The materials were applied to baromembrane separation of corn distillery. It was found that precipitate is formed mainly inside the pores of the pristine membrane. In the case of the organic-inorganic material, the deposition occurs onto the outer surface and can be removed by mechanical way. Location of the active layer inside membranes protects it against damage.

No MeSH data available.


Related in: MedlinePlus

Bulk density of the inner ZHP layer and its porosity. These characteristics are given as functions of mass fraction of the modifier.
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Fig7: Bulk density of the inner ZHP layer and its porosity. These characteristics are given as functions of mass fraction of the modifier.

Mentions: In a framework of the first approximation, bulk density of the incorporated modifier () can be determined from the m value and decrease of porosity. The porosity of ZHP (ε/) was calculated as , where is the particle density (3.3 g cm−3 for crystalline α-ZHP modification [32]). The plots of − m and ε/ − m demonstrate the maximum and minimum, respectively (Figure 7), which is evidently a result of a contradiction of two reasons: increase of microporosity on the one hand and decrease of mesopore volume on the other hand.Figure 7


Organic-inorganic materials containing nanoparticles of zirconium hydrophosphate for baromembrane separation.

Dzyazko YS, Rozhdestvenskaya LM, Zmievskii YG, Vilenskii AI, Myronchuk VG, Kornienko LV, Vasilyuk SV, Tsyba NN - Nanoscale Res Lett (2015)

Bulk density of the inner ZHP layer and its porosity. These characteristics are given as functions of mass fraction of the modifier.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4385033&req=5

Fig7: Bulk density of the inner ZHP layer and its porosity. These characteristics are given as functions of mass fraction of the modifier.
Mentions: In a framework of the first approximation, bulk density of the incorporated modifier () can be determined from the m value and decrease of porosity. The porosity of ZHP (ε/) was calculated as , where is the particle density (3.3 g cm−3 for crystalline α-ZHP modification [32]). The plots of − m and ε/ − m demonstrate the maximum and minimum, respectively (Figure 7), which is evidently a result of a contradiction of two reasons: increase of microporosity on the one hand and decrease of mesopore volume on the other hand.Figure 7

Bottom Line: The nanoparticles (4 to 10 nm) were found to form aggregates, which block pores of the polymer.Pores between the aggregates (4 to 8 nm) as well as considerable surface charge density provide significant transport numbers of counter ions (up to 0.86 for Na(+)).It was found that precipitate is formed mainly inside the pores of the pristine membrane.

View Article: PubMed Central - PubMed

Affiliation: Department of Sorption and Membrane Materials and Processes, V.I. Vernadskii Institute of General and Inorganic Chemistry, NASU, Palladin Pr. 32/34, 03142 Kiev, Ukraine.

ABSTRACT
Organic-inorganic membranes were obtained by stepwise modification of poly(ethyleneterephthalate) track membrane with nanoparticles of zirconium hydrophosphate. The modifier was inserted inside pores of the polymer, a size of which is 0.33 μm. Inner active layer was formed by this manner. Evolution of morphology and functional properties of the membranes were investigated using methods of porosimetry, potentiometry and electron microscopy. The nanoparticles (4 to 10 nm) were found to form aggregates, which block pores of the polymer. Pores between the aggregates (4 to 8 nm) as well as considerable surface charge density provide significant transport numbers of counter ions (up to 0.86 for Na(+)). The materials were applied to baromembrane separation of corn distillery. It was found that precipitate is formed mainly inside the pores of the pristine membrane. In the case of the organic-inorganic material, the deposition occurs onto the outer surface and can be removed by mechanical way. Location of the active layer inside membranes protects it against damage.

No MeSH data available.


Related in: MedlinePlus