Poly(amide-imide)/TiO2 nano-composite gas separation membranes: Fabrication and characterization

Hu, Qingyuan; Marand, Eva; Dhingra, Sukhtej S; Fritsch, Detlev; Wen, Jianye; Wilkes, Garth L.

doi:10.1016/s0376-7388(97)00120-8

Cited by 209 publications

(110 citation statements)

References 27 publications

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“…The prepared hybrids exhibited lithographical patterns with good resolution, suggesting potential applicability in the field of optoelectronic devices. Since PI hybrid materials combine the basic properties of organic and inorganic constituents, they can offer specific advantages for the preparation of membranes with enhanced selectivity and permeability, and improved thermal and chemical resistance [71,72]. In particular, PI/silica membranes have been found to exhibit promising gas permeation qualities and have been tailored to accommodate specific gas separations.…”

Section: Applicationsmentioning

confidence: 99%

“…In a later paper, Joly et al [74] investigated the role of silica in the modification of the membrane microstructure and the resulting effects on gas permeability. Similarly, Hu et al [75] prepared nanocomposite membranes that had higher permeability coefficients and significant improvements in permeselectivity. The diffusivity and selectivity toward gases were also investigated by Cornelius and Marand [76] They prepared, via sol-gel, a series of hybrid composites based on 6FDA-6FpDA and 6FDA-6FDA-DABA polyimides and various organo-silica structures.…”

Section: Applicationsmentioning

confidence: 99%

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Polyimide/silica hybrids via the sol-gel route: High performance materials for the new technological challenges

Ragosta¹,

Musto²

2009

Express Polym. Lett.

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Abstract. The present review article describes in detail the state-of-the-art of organic-inorganic hybrid materials based on polyimide/silica components. The article is divided in three parts. In the first the basic processing route for the preparation of these systems is described, i.e. the sol-gel technique, along with the strategies developed to control the final morphology. In the second part the curing characteristics, the dynamic-mechanical and the mechanical and fracture properties of hybrids with different morphologies are reviewed. Finally, the more technologically relevant applications devised for these high performance materials are discussed. : nanocomposites, hybrid materials, polyimide, silica, sol-gel eXPRESS Polymer Letters Vol.3, No.7 (2009) [413][414][415][416][417][418][419][420][421][422][423][424][425][426][427][428] Available online at www.expresspolymlett.com DOI: 10.3144/expresspolymlett.2009.51 or as functional materials [14] such as catalyst supports [15] and microelectronic devices [16]. The sol-gel route represents the preferred way for the synthesis of polyimide based hybrids. The classical sol-gel process consists in a two step hydrolysis-condensation reaction, starting with a metal alkoxides M(OR) 4 , typically tetraethoxisilane Si(OCH 2 CH 3 ) 4 or titanium isopropoxide Ti[OCH(CH 3 ) 2 ] 4 , to produce hydroxyl groups followed by the polycondensation of the hydroxyl groups and residual alkoxy groups to form a three-dimensional network [5,[17][18][19][20][21]. Polyimides are particularly suited for this type of process because they can be obtained from polyamic acid precursors, which are soluble in hygroscopic solvents and can, therefore, tolerate the addition of water necessary to bring about the hydrolysis of the metal alkoxide. Moreover, the outstanding thermal stability of polyimides allows the hybrids to be post-cured at very high temperatures (300-350°C) making it possible the development of a very dense inorganic network without inducing appreciable degradation of the organic phase. Polyimide/silica hybrids made by the sol-gel technique are the subject of this review, in which the approaches used for a close control of their final morphology, the effects of the silica phase on the curing process of polyimide precursors, the dynamic-mechanical and the mechanical and fracture properties that these materials can display, and their possible applications will be presented and discussed. Keywords Processing and morphologyA typical procedure for the preparation of PI/silica hybrids via the sol-gel route, involves the following steps: i) The polyamic acid (PAA) (PI precursor) is formed by a polyaddition reaction of a dianhydride [e.g., pyromellitic anhydride (PMDA), 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA), or 2,2-bis(3,4-dicarboxy-phenyl)-hexafluoropropane dianhydride (6FDA)] with a diamine [e.g., 4,4′-oxydianiline (ODA), or p-phenylen diamine (PPA)] in a common solvent [e.g., dimethylacetamide (DMAc), or N-methyl pyrolidone (NMP)]. The reaction and chemical str...

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Section: Applicationsmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Polyimide/silica hybrids via the sol-gel route: High performance materials for the new technological challenges

Ragosta¹,

Musto²

2009

Express Polym. Lett.

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“…As a result, acid-catalysted systems tend to consist of linear or random branches. On the other hand, base-catalysed systems tend to have highly branched non-interpenetrating clusters [12].…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, aromatic polyamideimide bring together both high thermal stability and high permeability and permselectivity characteristics of polyimides and superior mechanical properties of polyamides. In particular, the polyamide unit can facilitate hydrogen bonding to other components having either a proton donor or a proton acceptor group [12,15]. Secondly, both amide and sulphonating groups help to improve the hydrophilic properties of the hybrid materials, which is essential for this material to be used for water separation application.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of hybrid organic–inorganic materials based on sulphonated polyamideimide and silica

et al. 2010

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Abstract:The preparation of hybrid organic-inorganic membrane materials based on a sulphonated polyamideimide resin and silica filler has been studied. The method allows the sol-gel process to proceed in the presence of a high molecular weight polyamideimide, resulting in well dispersed silica nanoparticles (<50nm) within the polymer matrix with chemical bonding between the organic and inorganic phases.Tetraethoxysilane (TEOS) was used as the silica precursor and the organosilicate networks were bonded to the polymer matrix via a coupling agent aminopropyltriethoxysilane (APTrEOS). The structure and properties of these hybrid materials were characterized via a range of techniques including FTIR, TGA, DSC, SEM and contact angle analysis. It was found that the compatibility between organic and inorganic phases has been greatly enhanced by the incorporation of APTrEOS.The thermal stability and hydrophilic properties of hybrid materials have also been significantly improved.

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“…Zeolites, carbon molecular sieves (CMS) and metal oxides are various types of inorganic materials that are widely used in the preparation of nanocomposite membranes. These fillers provide great performance for gas separation processes (Te Hennepe, 1998;Suda and Haraya, 1997;Moaddeb and Koros, 1997;Hu et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and gas permeation study of PSf/MgO nanocomposite membrane

Momeni

Pakizeh

2013

Braz. J. Chem. Eng.

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-Nanocomposite membranes composed of polymer and inorganic nanoparticles are a novel method to enhance gas separation performance. In this study, membranes were fabricated from polysulfone (PSf) containing magnesium oxide (MgO) nanoparticles and gas permeation properties of the resulting membranes were investigated. Membranes were prepared by solution blending and phase inversion methods. Morphology of the membranes, void formations, MgO distribution and aggregates were observed by SEM analysis. Furthermore, thermal stability, residual solvent in the membrane film and structural ruination of membranes were analyzed by thermal gravimetric analysis (TGA). The effects of MgO nanoparticles on the glass transition temperature (T g ) of the prepared nanocomposites were studied by differential scanning calorimetry (DSC). The T g of nanocomposite membranes increased with MgO loading. Fourier transform infrared (FTIR) spectra of nanocomposite membranes were analyzed to identify the variations of the bonds. The results obtained from gas permeation experiments with a constant pressure setup showed that adding MgO nanoparticles to the polymeric membrane structure increased the permeability of the membranes. At 30 wt% MgO loading, the CO 2 permeability was enhanced from 25.

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Poly(amide-imide)/TiO2 nano-composite gas separation membranes: Fabrication and characterization

Cited by 209 publications

References 27 publications

Polyimide/silica hybrids via the sol-gel route: High performance materials for the new technological challenges

Polyimide/silica hybrids via the sol-gel route: High performance materials for the new technological challenges

Synthesis and characterization of hybrid organic–inorganic materials based on sulphonated polyamideimide and silica

Preparation, characterization and gas permeation study of PSf/MgO nanocomposite membrane

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