Relationship between polymer–filler interfaces in separation layers and gas transport properties of mixed matrix composite membranes

Wang, Ming; Wang, Zhi; Li, Nan; Liao, Jiayou; Zhao, Song; Wang, Jixiao; Wang, Shichang

doi:10.1016/j.memsci.2015.08.019

Cited by 79 publications

(44 citation statements)

References 62 publications

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“…This result implies that the addition of organic or inorganic silica has further decreased the crystallinity of composite. Wang et al (2015) also reported the same trend in their study on polyvinylamine (PVAm)/silica composite that the addition of inorganic silica will PEER-REVIEWED ARTICLE bioresources.com . "PLA composite with OPEFB," BioResources 11(1), 2269-2286. 2280 decrease the crystallinity of polymer composite.…”

Section: Xrdmentioning

confidence: 66%

Preparation and Characterization of Poly(lactic Acid)-based Composite Reinforced with Oil Palm Empty Fruit Bunch Fiber and Nanosilica

Yee¹,

Ching²,

Rozali³

et al. 2016

BioResources

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The properties of poly(lactic acid) (PLA) bio-composite films reinforced with oil palm empty fruit bunch (OPEFB) fiber and nanosilica were studied in this work. The composite films were prepared via the solvent casting method. The composites were characterized via Fourier transform infrared spectroscopy (FTIR), UV-visible spectroscopy, fieldemission scanning electron microscopy (FESEM), tensile testing, and Xray diffraction (XRD). Ultraviolet visible spectroscopy results revealed that the PLA-based composites and neat PLA had similar light transmittances of approximately 89%. The FTIR and FESEM results showed that OPEFB fibers and nanosilica were embedded into the PLA matrix. The tensile strength of the composites with addition of nanosilica increased with an increasing fiber load content. The XRD analysis showed that the addition of organic or inorganic silica reduced the crystallinity of the composites. The water vapor permeability test results indicated that the inorganic silica decreased the diffusion rate of water molecules through the polymer film. The OPEFB-reinforced PLA blend with additional organic silica exhibited a higher thermal stability than the composites reinforced with inorganic silica.

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Section: Xrdmentioning

confidence: 66%

Preparation and Characterization of Poly(lactic Acid)-based Composite Reinforced with Oil Palm Empty Fruit Bunch Fiber and Nanosilica

Yee¹,

Ching²,

Rozali³

et al. 2016

BioResources

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“…However, mixed-matrix membranes based on this type of polymer matrix show the presence of interfacial void defects. In order to solve this problem, many types of modifications have been made, such as: application of silane and amine coupling agents to improve interfacial adhesion and gas selectivity (changing the surface properties of fillers from hydrophilic to hydrophobic), coating of nonselective slots with a silicone rubber, and addition of a plasticizer to reduce the intrinsic gas separation performance of polymers [9][10][11][12][13][14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Rybak

Sysel

2018

Applied Sciences

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Abstract:The following article proposes a modern computer application MOT (Membrane Optimization Tool) for modeling of gas transport processes through mixed-matrix membranes (MMMs). The current version of the application is based on the Maxwell model, which can be successfully used to model gas transport through the simplest types of hybrid membranes without any defects. The application has been verified on the example of four types of hybrid membranes, consisting of various types of polymer matrix, such as: poly (vinyl acetate), 2, 2 -BAPB + BPADA, Ultem, hyperbranched polyimide (ODPA-MTA) and zeolite 4A. The average absolute relative error (AARE) and root-mean-square error (RMSE) were calculated in order to compare the theoretical MOT-predicted results with the experimental results. It was found that the AARE ranges from 29% to 36%, while the RMSE is in the range of 10% to 29%. The article presents also the comparison of MOT-predicted data obtained with Maxwell and Bruggeman models. To obtain more accurate reproduction of experimental results, further versions of the proposed application will be extended with next-generation permeation models (Lewis-Nielsen, Pal, modified Maxwell or Felske models), allowing for the description of transport in more complex systems with the possibility of taking into account possible defects.

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“…Particularly, in composite membrane it could be appreciated a slight shift of the peak to 17.84°of 2θ when the content of silica APTES precursor was 25wt%, indicating an increase on the distance between polysulfone chains (d-spacing) and suggesting the increment in free volume. Moreover, the slight decrease in the intensity of this peak is an indicative of the interruption on the polymer chains packing due to the presence of silica particles (Rafiq et al, 2012;Zhao et al, 2012;Wang et al, 2015). Like, the broad peak from silica particles was possibly overlapped by the peak of polysulfone.…”

Section: Xrd Analysismentioning

confidence: 92%

“…The increase on Young's modulus is attributed to the higher interaction between organic and inorganic phase given by the coupling agent. On the other hand, the relationship between polymer-filler interfaces of polyvinylaminebased composite membranes containing silica and other post-grafted amino-modified nanofillers has been reported by Wang et al 2015. They suggested that the surface modification of fillers could improve the interface compatibility.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Source on the Synthesis and Properties of Polysulfone/Silica Composite Membranes for Gas Separation

Castruita¹

2018

Rev. Mex. Ing. Quim.

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This work reports the synthesis in-situ of silica particles inside a polysulfone matrix by the sol-gel method in acidic medium using different polymerization inorganic precursors: tetraethylorthosilicate (TEOS), 3-aminopropyltriethoxysilane (APTES) and mixture of them. The effect of the type of inorganic precursor on the formation of silica particles was studied. Composite membranes were prepared by casting technique from these organic-inorganic materials. These membranes were characterized by X-ray diffraction (XRD), infrared spectroscopy (FTIR), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The morphology, particle size and particle-polymer interaction were studied by scanning electron microscopy (SEM). Additionally, a semi-quantitative chemical analysis by energy dispersive X-ray spectroscopy (EDX) showed the chemical composition of the composite membranes. Type and concentration of silica precursor affected the morphology, particle size and distribution of silica in the composite membranes. Composite membranes without interfacial voids were obtained from APTES at 25 wt%. Initial studies about the gas separation properties of CO 2 /CH 4 gas mixture revealed an improvement on the CO 2 permeability of composite membrane comprising silica particles synthesized from APTES in comparison with the polymeric membrane. Keywords: silica, sol-gel, polysulfone, composite membrane, gas separation. ResumenEn este trabajo se reporta la síntesis in-situ de partículas de sílice dentro de una matriz de polisulfona mediante el método sol-gel en medio ácido usando diferentes precursores inorgánicos de polimerización: tetraetilortosilicato (TEOS), 3-aminopropiltrietoxisilano (APTES) y mezcla de ambos. Se estudió el efecto del tipo de precursor inorgánico en la formación de las partículas de sílice. Las membranas compuestas se prepararon por evaporación del disolvente a partir de los materiales orgánico-inorgánico. Estas membranas se caracterizaron por difracción de rayos X (XRD), espectroscopía de infrarrojo (FTIR), calorimetría diferencial de barrido (DSC) y análisis termogravimétrico (TGA). La morfología, tamaño de partícula y la interacción partícula-polímero se estudiaron por microscopia electrónica de barrido (SEM). Adicionalmente, el análisis químico semicuantitativo mediante espectroscopía de energía dispersiva de rayos X (EDX) mostró la composición química de las membranas compuestas. El tipo y la concentración del precursor de la sílice afectaron la morfología, el tamaño de partícula y la distribución de la sílice en las membranas compuestas. Las membranas compuestas que fueron obtenidas a partir de APTES al 25% no mostraron huecos interfaciales. Estudios iniciales de las propiedades de separación de una mezcla CO 2 /CH 4 revelaron el mejoramiento de la permeabilidad de CO 2 de las membranas compuestas que contienen partículas de sílice sintetizadas a partir de APTES en comparación con la membrana polimérica.

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Relationship between polymer–filler interfaces in separation layers and gas transport properties of mixed matrix composite membranes

Cited by 79 publications

References 62 publications

Preparation and Characterization of Poly(lactic Acid)-based Composite Reinforced with Oil Palm Empty Fruit Bunch Fiber and Nanosilica

Preparation and Characterization of Poly(lactic Acid)-based Composite Reinforced with Oil Palm Empty Fruit Bunch Fiber and Nanosilica

Modeling of Gas Permeation through Mixed-Matrix Membranes Using Novel Computer Application MOT

Effect of Silica Source on the Synthesis and Properties of Polysulfone/Silica Composite Membranes for Gas Separation

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