Crystallization behavior of polymer/montmorillonite nanocomposites. Part I. Intercalated poly(ethylene oxide)/montmorillonite nanocomposites

Homminga, Douwe; Goderis, Bart; Dolbnya, Igor P.; Reynaers, Harry; Groeninckx, Gabriël

doi:10.1016/j.polymer.2005.10.016

Cited by 74 publications

(70 citation statements)

References 28 publications

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“…These results are an indirect indication that the MMT clay might be concentrated in the GBL phase instead of the polymer phase for high loading of clay. A similar behavior was observed by Homminga et al 36 for electrolytes prepared with PEO and MMT. At low concentrations of clay, these inorganic particles interact randomly with the polymer.…”

supporting

confidence: 87%

“…For the sample containing 3% of clay, the inorganic additive induces a small crystallization at -10 o C followed by a melting at ca. 16 o C. For the pure polymer sample such crystallization is seen at -31 o C. 38 Homminga et al 36 observed a similar effect in their system where MMT retards the PEO crystallization at low clay content. Here, the presence of clay shifts the crystallization to higher temperatures.…”

mentioning

confidence: 73%

“…Thus, the addition of the clay to the electrolyte is an important approach, not only to keep the solid-state nature of the electrolyte, but also because the clay may lead to a further increase on the ionic conductivity, as has been observed in several reports. 36,37 Figure 2 presents the plot of ionic conductivity as a function of clay concentration for the CPE. The clay content is expressed in relation to the weight of polymer + plasticizer.…”

Section: Resultsmentioning

confidence: 99%

“…31,35 Particularly, composite polymer electrolytes (CPE) based on organophilic clays have received considerable attention in the last years. Homminga et al 36 reported the addition of an organic modified MMT to PEO and investigated the influence of the MMT in the crystallization of the polymer. It was shown that the silicate layers act as nucleating agents for the crystallization of PEO, but at high MMT contents a retarding effect on the crystal growth was observed.…”

Section: Introductionmentioning

confidence: 99%

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Application of a composite polymer electrolyte based on montmorillonite in dye-sensitized solar cells

Ito¹,

Freitas²,

Paoli³

et al. 2008

J. Braz. Chem. Soc.

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Neste trabalho um eletrólito polimérico nanocompósito baseado em uma argila do tipo montmorilonita e um polímero derivado do poli(óxido de etileno) plastificado com -butirolactona foi preparado e caracterizado. Apesar da adição de plastificantes à matriz polimérica aumentar a condutividade iônica de eletrólitos poliméricos, a adição de grande quantidade desses aditivos compromete as propriedades mecânicas do sistema, de tal maneira que o ganho em condutividade não compense a perda na natureza "sólida" do meio eletrolítico. Filmes do eletrólito nanocompósito contendo diferentes concentrações de argila foram caracterizados por análise térmica e mecânica e por espectroscopia de impedância eletroquímica. A adição de montmorilonita resultou numa melhora das propriedades mecânicas do eletrólito, além de contribuir para um aumento da condutividade iônica do sistema. O eletrólito compósito foi aplicado em uma célula solar de TiO 2 /corante pela primeira vez, resultando em um dispositivo com eficiência superior a 3% sob irradiação de 10 mW cm -2 .In this work we report for the first time the preparation and characterization of a novel composite polymer electrolyte based on montmorillonite clay and a poly(ethylene oxide) derivative plasticized with -butyrolactone and its application in dye sensitized solar cells. Although the plasticizers enhance the ionic conductivity of the polymer electrolytes, they compromise the mechanical stability of the whole system and make the practical application of these devices difficult. Films with composite polymer electrolytes containing different clay content were analyzed by thermal and mechanical analysis and electrochemical impedance spectroscopy. We observed that the addition of the inorganic particles to the polymer matrix promotes not only an enhancement in the mechanical properties but also contributes to the increase the of ionic conductivity of the system. A solid-state dye-sensitized solar cell was assembled for this first time with the electrolyte containing montmorillonite clay, displaying efficiencies higher than 3% at 10 mW cm -2 .Keywords: MMT clay, composite polymer electrolyte, ionic conductivity, dye sensitized solar cells IntroductionSince Grätzel's announcement of the first dye-sensitized nanocrystalline solar cells (DSSC) 1 as promising, low cost, clean, and highly efficient devices for solar energy conversion, many groups have focused their efforts on improving and comprehending this technology in its different aspects. The liquid electrolyte usually employed in this cell is still a drawback for long-term practical operation due to electrolyte leakage or evaporation. It makes the large scale production difficult and causes substantial problems to bring DSSC onto the market. To overcome these problems, many research groups have been searching for alternatives to replace the liquid electrolytes, such as inorganic or organic hole conductors, 2-4 ionic liquids, 5,6 polymer 7-9 and gel electrolytes. [10][11][12][13][14] Our group has been working on DSSC using polymer el...

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supporting

confidence: 87%

mentioning

confidence: 73%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of a composite polymer electrolyte based on montmorillonite in dye-sensitized solar cells

Ito¹,

Freitas²,

Paoli³

et al. 2008

J. Braz. Chem. Soc.

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“…181 Do sličnih zaključaka se došlo u ispitivanju uticaja čestica gline na brzinu kristalizacije poli(etilen oksida), ali u ovom slučaju udeo punila nema uticaja na stepen kristaliničnosti i stukturu i morfologiju nastalih kristalita. 182 U slučaju nanokompozita poli(laktida) i organski modifikovane gline ukupna brzina kristalizacije polimera je veća u nanokompozitu nego u čistom poli(laktidu), jer čestice gline predstavljaju dodatne nukleuse za kristalizaciju poli(laktida). Tu nastaje veći broj sferulita manjeg prečnika nego pri kristalizaciji samog poli(laktida), ali čestice gline nemaju uticaja na linearnu brzinu rasta samih sferulita.…”

Section: Svojstva Polimernih Nanokompozitaunclassified

Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties

Džunuzović¹

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Characterization of Nanocomposites by Scattering Methods

Causin

2013

Polymer Composites

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Crystallization behavior of polymer/montmorillonite nanocomposites. Part I. Intercalated poly(ethylene oxide)/montmorillonite nanocomposites

Cited by 74 publications

References 28 publications

Application of a composite polymer electrolyte based on montmorillonite in dye-sensitized solar cells

Application of a composite polymer electrolyte based on montmorillonite in dye-sensitized solar cells

Preparation of nanocomposites based on thermoplastic polymers and influence of titanium and iron oxides nanoparticles on their properties

Characterization of Nanocomposites by Scattering Methods

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