Organic-inorganic hybrid membranes in separation processes: a 10-year review

Souza, Vanderlei C.; Quadri, Mara Gabriela Novy

doi:10.1590/s0104-66322013000400001

Cited by 82 publications

(30 citation statements)

References 98 publications

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“…However, the void formation occurs when the stress directions are nonuniform. Other factors that cause the void formation are the differences in thermal expansion, repulsive forces, weaker adhesion among the polymer and particle, polymer packing disruption, and the effects of elongation stress formed during membrane drying …”

Section: Resultsmentioning

confidence: 99%

Polycarbonate/silica nanocomposite membranes: Fabrication, characterization, and performance evaluation

Idris

Man

Maulud

2017

J of Applied Polymer Sci

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Polycarbonate/silica nanocomposite membranes at low silica loading were fabricated by solution blending and solvent evaporation technique. The functionalized silica nanoparticles used were synthesized by co-condensing hydrolyzed tetraethylorthosilicate with 3-aminopropyl trimethoxysilane in the sol-gel process. The membranes morphology, composition, surface, structure, thermal and mechanical properties were analyzed by the standard characterization techniques. The gas permeation tests were conducted in four-channel permeation cells. Field emission scanning electron microscopy results reveal that membranes above 3 wt % silica content formed distinguishable voids and agglomerates. Fair distribution of silica nanoparticles and absence of residual solvents were observed by energy dispersive X-ray and thermogravimetric analysis. Fourier transform infrared spectroscopy spectra confirmed the presence of new functional groups (NAH) and (OAH) bonds. The X-ray diffraction pattern revealed the polymer-particle interactions, the formation of rigidified polymer chain, and nanostructured silicon crystals. Further, the thermogravimetric analysis results revealed thermal stability enhancement while differential scanning calorimetry results of increased glass transition temperatures confirmed the presence of rigidified polymer chain. Furthermore, enhancements in mechanical strength of the membranes were observed. Moreover, at all feed pressures, increased CO 2 , N 2 , and CH 4 gas permeation was observed. At 6 bar feed pressure, the CO 2 /N 2 and CO 2 /CH 4 ideal selectivities of PC membranes with 3 wt % silica loading have increased from 19.2 to 38.0 and 29.2, respectively.

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Section: Resultsmentioning

confidence: 99%

Polycarbonate/silica nanocomposite membranes: Fabrication, characterization, and performance evaluation

Idris

Man

Maulud

2017

J of Applied Polymer Sci

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“…Polymers such as cellulose acetate, polysulfone, ethyl acetate, PTMSP [22] Polydimethylsiloxane (PDMS), Polyvinylchloride, Polyacrylonitrile (PAN), Polyaramid are used to construct the membranes for filtration and separation [23]. Initially, pure polymeric membranes were developed for air separation but it has some shortcomings such as less purity, chemical degradation, low mechanical strength and thermal stability [24].Mixed matrix membranes were also developed to attain higher quantity (permeability) of target gas species with improved mechanical properties by incorporation of nano metal oxides and fillers [24][25][26][27][28]. Despite the developments, difficulties in separation of binary gas species from the atmospheric air (for example O2/Ar, H2/N2, and CO2/O2) by mixed matrix membrane continue to exist.…”

Section: Introductionmentioning

confidence: 99%

Multilayer Polymeric Nano composite Membrane for Oxygen Separation

Nallathambi

Dhinakaran

2019

Bull. Sci. Res.

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Air separation is a process of separating primary components from the atmospheric air. Development of membrane technologies plays a key role in air separation. Multi-layer polymeric nanocomposite membranes have been developed by a novel technique using Polyacrylonitrile (PAN) and cellulose acetate (CA) along with nano silica particles (SiO2) to obtain a higher oxygen selectivity and permeability. For the construction of the multilayer membrane, the Box-Behnken design has been used by employing three independent variables namely PAN Electro spinning time, the SiO2 percentage in the PAN polymer and CA/PEG polymer concentration. The developed membranes have been characterized for its surface morphology and physical properties. Along with the analysis of compound desirability, the results were also subject to statistical analysis in order to form regression equations. The electro spun fiber diameter increases along with the concentration of SiO2 nanoparticles and the range is from 50 nm to 400 nm. Moreover, the maximum pore size on the surface of the membrane lies between 200 to 400 nm whereas the maximum percentage of oxygen purity obtained is 48 with the permeate flux of 5.45 cm3/cm2/min.

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“…Since the issue of the transport properties optimization of nanocomposite polymer membranes remains relevant to this day, there have been attempts to make some generalizations known; review papers [1,5,13,[24][25][26][27][28][29]. These studies raises general questions [1,30], but in most cases the analytical generalizations were made for solving specific problems of a separation [31][32][33][34][35][36] or other tasks including fuel cells or catalytic membrane reactors applications [37][38][39][40][41][42][43]. In general, it is necessary to highlight review articles in which information is collected on the introduction of a certain type of nanoparticles in polymer films of different morphologies, for example membranes-containing 0D to 2D nano-fillers [37,44,45].…”

Section: Introductionmentioning

confidence: 99%

Polymer Nanocomposite Membranes

et al. 2018

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Based on the results of research works reflected in the scientific literature, the main examples, methods and approaches to the development of polymer inorganic nanocomposite materials for target membranes are considered. The focus is on membranes for critical technologies with improved mechanical, thermal properties that have the necessary capabilities to solve the problems of a selective pervaporation. For the purpose of directional changes in the parameters of membranes, effects on their properties of the type, amount and conditions of nanoparticle incorporation into the polymer matrix were analyzed. An influence of nanoparticles on the structural and morphological characteristics of the nanocomposite film is considered, as well as possibilities of forming transport channels for separated liquids are analyzed. Particular attention is paid to a correlation of nanocomposite structure-transport properties of membranes, whose separation characteristics are usually considered within the framework of the diffusion-sorption mechanism.

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Organic-inorganic hybrid membranes in separation processes: a 10-year review

Cited by 82 publications

References 98 publications

Polycarbonate/silica nanocomposite membranes: Fabrication, characterization, and performance evaluation

Polycarbonate/silica nanocomposite membranes: Fabrication, characterization, and performance evaluation

Multilayer Polymeric Nano composite Membrane for Oxygen Separation

Polymer Nanocomposite Membranes

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