Percolation of composite poly(vinyltrimethylsilane) membranes with carbon nanotubes

Grekhov, A. M.; Дибров, Г. А.; Volkov, V. V.

doi:10.1134/s0965544113080069

Cited by 23 publications

(10 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the FAV t values obtained for PVTMS (4%) and PTMSP/ PVTMS (40/60) (11%) were not high enough to provide the formation of liquid percolation clusters and, as a result, liquid transport through the membrane, despite noticeable liquid fraction within these materials and swelling degree in ethanol (see Table 1). It is worth noting that the creation of a percolation cluster resulting in liquid permeability of PVTMS can be attained by addition of a small amount of multiwall carbon nanotubes (MWCNT) [40]. It was shown that no percolation cluster was formed in the hybrid PVTMS/MWCNT membranes with MWCNT content of 0.4 wt.% or below, resulting in absence of ethanol flux through the membrane at a pressure difference of 160 bar.…”

Section: Nanofiltration Performance In Ethanolmentioning

confidence: 98%

“…However, further increase of MWCNT concentration (from 0.5 wt.%) led to the establishment of liquid transport, which exhibited a linear function with inorganic filler content. Thus, the percolation cluster was formed and ethanol transport through this cluster determined the ethanol permeability through the hybrid membrane [40].…”

Section: Nanofiltration Performance In Ethanolmentioning

confidence: 99%

See 1 more Smart Citation

Study of glassy polymers fractional accessible volume (FAV) by extended method of hydrostatic weighing: Effect of porous structure on liquid transport

Yushkin

Grekhov

Матсон

et al. 2015

Reactive and Functional Polymers

View full text Add to dashboard Cite

Section: Nanofiltration Performance In Ethanolmentioning

confidence: 98%

Section: Nanofiltration Performance In Ethanolmentioning

confidence: 99%

Study of glassy polymers fractional accessible volume (FAV) by extended method of hydrostatic weighing: Effect of porous structure on liquid transport

Yushkin

Grekhov

Матсон

et al. 2015

Reactive and Functional Polymers

View full text Add to dashboard Cite

“…The introduction of nanotubes to the structure of membranes is only beneficial in a well-defined range of concentration. According to many authors, finding the optimum nanotubes concentration is a crucial factor [36]. It is a small number of nanoparticles that make the membrane then have the most favorable separation properties [37,38].…”

Section: Modified Membranes Characteristicmentioning

confidence: 99%

Application of Waste Polymers as Basic Material for Ultrafiltration Membranes Preparation

Adamczak

Kamińska

Bohdziewicz

2020

Water

View full text Add to dashboard Cite

Polystyrene is a polymer commonly used in civil engineering as styrofoam for building isolation. It is also used in the packaging of glass and sensitive products such as electronics, household products, and other goods. Single-use products such as cups and plates made from synthetic materials are important for waste management. All of these products are responsible for the creation of 6200 kt of waste in 2015 alone. Quite a new idea of the application of styrofoam waste is to use it as basic material for preparation of membranes, which are widely used for water reclamation. Nowadays, membranes are prepared from different, non-waste polymers like polysulfone, poly(ether sulfone), polyacrylonitrile, and others. The aim of this study was to prepare polystyrene waste ultrafiltration membrane and assess its usage to treat river surface water. Conducted tests have been divided into two stages: the first part tested four membranes with different concentrations of waste polymer in order to determine the membrane with the most favorable properties. In the second part, selected membrane was modified with single-walled carbon nanotubes functionalized with hydroxyl groups in three different concentrations. The ultrafiltration process was conducted in a dead-end system under pressure of 0.1 MPa. The obtained results suggest that the ultrafiltration membranes with waste styrofoam guarantee similar treatment effects as with the usage of membranes made with other polymers or commercial membranes.

show abstract

“…In addition to traditional problems such as improving the strength and electric conductivity of polymers [3], numerous current studies are devoted to the development of new mixed matrix membranes with MWCNTs [4]. The introduction of MWCNTs not only strengthens polymer membranes, but also improves the selective transport of fluids and gases [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Influence of carbon-nanotube concentration in chloroform on the kinetics of agglomeration and sedimentation

Grekhov

2015

Nanotechnol Russia

Self Cite

View full text Add to dashboard Cite

A uniform distribution of carbone nanotubes in a polymer matrix is required for the fabrication of composite materials. Since carbon nanotubes for introduction into polymers are preliminarily dissolved in water or organic solvents, it is necessary to create a uniform stable dispersion of carbon nanotubes in solvents. It is shown in this work that the concentration of nanotubes is a critical parameter determining the stability and composition of a solution. The kinetics of agglomeration of multiwalled carbon nanotubes dispersed in chloroform by sonication has been studied using optical spectroscopy and dynamic light scattering. It has been shown that such solutions can be stable for a long time at nanotube concentrations below 0.01 wt %. The intense agglomeration and sedimentation of nanotubes have been observed in a solution with a higher concentration.

show abstract

Percolation of composite poly(vinyltrimethylsilane) membranes with carbon nanotubes

Cited by 23 publications

References 29 publications

Study of glassy polymers fractional accessible volume (FAV) by extended method of hydrostatic weighing: Effect of porous structure on liquid transport

Study of glassy polymers fractional accessible volume (FAV) by extended method of hydrostatic weighing: Effect of porous structure on liquid transport

Application of Waste Polymers as Basic Material for Ultrafiltration Membranes Preparation

Influence of carbon-nanotube concentration in chloroform on the kinetics of agglomeration and sedimentation

Contact Info

Product

Resources

About