Nanocomposite structure depending on the degree of surface treatment of layered silicate

Suh, Duck Jong; Park, O Ok

doi:10.1002/app.10166

Cited by 35 publications

(29 citation statements)

References 5 publications

(5 reference statements)

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“…Therefore, many publications focused on the compatibility improvement between the filler and the matrix. The influence of the type of cations surrounding the platelets together with the cationic exchange rate has been widely documented [16][17][18][19][20][21][22][23][24][25][26][27][28][29]. For certain polymers, the introduction of a compatibilizer was found to be the successful way to separate the clay platelets in the matrix.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Polymer Layered Silicate Nanocomposites by Rheology and Permeability Methods: Impact of the Interface Quality

Waché

Klopffer

Gonzalez

2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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> Development of Reactive Barrier Polymers against Corrosion for the Oil and Gas Industry: From Formulation to Qualification through the Development of Predictive Multiphysics ModelingDéveloppement de matériaux barrières réactifs contre la corrosion pour l'industrie pétrolière : de la formulation à la qualification industrielle en passant par le développement de modèles multiphysiques prédictifs Abstract -Polymer clay nanocomposites are mostly described as materials with improved properties. However, many studies are not concluding about the possible benefits. This work reports permeability measurements on different polyolefins nanocomposites. Clay exfoliation has been proved by various techniques. Unfortunately, the nanocomposite does not exhibit good barrier properties. Hence, permeability coefficients were found to increase. A poor quality of the interface between filler and medium is likely to be responsible for this degradation. Insufficient interactions between silicate layers and the surrounding polymer lead to preferential pathways for diffusion. Organoclay exfoliation does not necessarily lead to better barrier properties. A good quality of the interface between polymer and filler is required to reach a high performance level. The standard techniques used to characterize exfoliation degree do not permit to highlight this kind of phenomena.Re´sume´-Caracte´risation de nanocomposites polyme`re silicate par des me´thodes de rhe´ologie et de perme´abilite´: roˆle de la qualite´de l'interface -Les nanocomposites polyme`re argile sont ge´ne´ralement de´crits comme des mate´riaux aux proprie´te´s ame´liore´es. Cependant de nombreuses e´tudes ne sont pas force´ment concluantes quant aux be´ne´fices attendus. Le pre´sent travail rapporte des mesures de perme´abilite´sur diffe´rents nanocomposites a`matrice polyole´fine. L'exfoliation de l'argile a e´te´e´tablie graˆce a`diverses techniques. Malheureusement les nanocomposites ne pre´sentent pas de meilleures proprie´te´s barrie`re. Plus spe´cifiquement une augmentation des coefficients de perme´abilite´a e´te´constate´e. Une mauvaise qualite´de l'interface entre l'argile et la matrice est probablement responsable de cette de´gradation. Une interaction insuffisante entre les feuillets de silicate et le polyme`re les entourant entraıˆne la formation de chemins pre´fe´rentiels de diffusion. L'exfoliation d'argile organophile n'est donc pas suffisante pour conduire a`l'obtention de meilleures proprie´te´s barrie`re. Une bonne qualited e l'interface entre le polyme`re et la charge est ne´cessaire pour atteindre de bonnes performances. Les techniques classiques qui caracte´risent l'exfoliation ne permettent pas de mettre en avant ce type de phe´nome`ne.

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Section: Introductionmentioning

confidence: 99%

Characterization of Polymer Layered Silicate Nanocomposites by Rheology and Permeability Methods: Impact of the Interface Quality

Waché

Klopffer

Gonzalez

2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Multilayered silicates have been used as nano-sized fillers in polymer nanocomposites, and the most well-known include montmorillonite, saponite, hectorite, talc, and mica [1][2][3]. Generally, they are naturally synthesized as bulk-material and they are pulverized into fine μm-size particles.…”

Section: Introductionmentioning

confidence: 99%

“…The driving force to separate them from each other is given by polymer penetration through the interlayers of the silicate monolayers. The polymer chains are in the form of coil-like conformation in the interlayers, which leads to intercalated or exfoliated nanocomposites [1,2]. However, it is very difficult for the polymer chains to penetrate into the hydrophilic interlayers.…”

Section: Introductionmentioning

confidence: 99%

Effect of Electric Field Frequency on the AC Electrical Treeing Phenomena in an Epoxy/Layered Silicate Nanocomposite

Park

2013

Transactions on Electrical and Electronic Materials

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The effects of electric field frequency on the AC electrical treeing phenomena in an epoxy/layered silicate (1.5 wt%) were investigated in a needle-plate electrode arrangement. A layered silicate was exfoliated in an epoxy-base resin with AC electric field apparatus. To measure the treeing initiation and propagation-and the breakdown rate, a constant alternating current (AC) of 10 kV with three different electric field frequencies (60, 500, and 1,000 Hz) was applied to the specimen in the needle-plate electrode specimen in an insulating oil bath at130℃. At 60 Hz, the treeing initiation time was 12 min, the propagation rate was 0.24 × 10 -3 mm/min, and the morphology was a dense branch type. As the electric field frequency increased, the treeing initiation time decreased and the propagation rate increased. At 1,000 Hz, the treeing initiation time was 5 min, the propagation rate was 0.30 × 10 -3 mm/min, and the morphology was a dense bush type.

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“…have been introduced to polymer matrixes as a nanosized filler in order to give them some special characteristics such as electrical insulation, modulus, hardness, thermal stability, etc [1][2][3]. However, they exist as micro-sized multilayered bulk shapes prior to being used in a polymer matrix.…”

Section: Introductionmentioning

confidence: 99%

“…The driving force to separate them from each other is given by polymer penetration into the intergalleries between the silicate monolayers [4,5]. The polymer chains are presented in the intergalleries forming A coil-like conformation which leads to intercalated or exfoliated nonocomposites [2,3].…”

Section: Introductionmentioning

confidence: 99%

Effect of Amino Silane Coupling Agent on the AC Electrical Breakdown Phenomena of Epoxy/Layered Silicate Nanocomposite in Needle-plate Electrodes

Park

2012

Transactions on Electrical and Electronic Materials

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The effects of amino silane coupling agent on the AC electrical treeing and breakdown behaviors in an epoxy/layered silicate (1 wt%) were examined in needle-plate electrode geometry. A layered silicate was exfoliated in an epoxy base resin by using our AC electric field apparatus. To measure the tree initiation and propagation and the breakdown rate, an alternating current (AC) of 10 kV (60 Hz) was applied to the specimen in needle-plate electrode arrangement with a 30℃ insulating oil bath. In the epoxy/amino silane system, the tree initiation time was 11.5 times higher and the breakdown time was 17.9 times higher than those of the neat epoxy resin. The tree initiation time in the epoxy/layered silicate (1 wt%) system with the amino silane was 2.0 times higher, and the breakdown time was 1.5 times higher than those of the epoxy/layered silicate (1 wt%) system.

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Nanocomposite structure depending on the degree of surface treatment of layered silicate

Cited by 35 publications

References 5 publications

Characterization of Polymer Layered Silicate Nanocomposites by Rheology and Permeability Methods: Impact of the Interface Quality

Characterization of Polymer Layered Silicate Nanocomposites by Rheology and Permeability Methods: Impact of the Interface Quality

Effect of Electric Field Frequency on the AC Electrical Treeing Phenomena in an Epoxy/Layered Silicate Nanocomposite

Effect of Amino Silane Coupling Agent on the AC Electrical Breakdown Phenomena of Epoxy/Layered Silicate Nanocomposite in Needle-plate Electrodes

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