Synthesis and characterization of thermoplastic polyurethane/nanoclay composites

Pizzatto, Leandro; Lizot, A.; Fiório, Rudinei; Amorim, Cintia L.G.; Machado, Giovanna; Giovanela, Marcelo; Zattera, Ademir J.; Crespo, Janaína da Silva

doi:10.1016/j.msec.2008.08.035

Cited by 32 publications

(19 citation statements)

References 14 publications

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“…The application of polymer composites in water purification has been scarcely documented in literature, however their major application has been reported in construction, packaging and automobile industries [38]. In this work, the adsorption efficiency of the PP-zeolite composites was determined in water spiked with heavy metals and phenolic compounds.…”

Section: Application Of Thermoplastic/particulate Compositesmentioning

confidence: 99%

Polypropylene–zeolite polymer composites for water purification: synthesis, characterisation and application

Motsa

Msagati

Thwala

et al. 2013

Desalination and Water Treatment

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This paper reports on the preparation of polypropylene-zeolite polymer composites using the melt-mixing compounding technique. These polymer composites have shown unique and enhanced properties as compared to their monolithic constituents. All polymer hybrids were formed by solvent-less melt-intercalation and extrusion. The changes in conventional properties of the two mixed constituents were probed using techniques, such as scanning electron microscopy, X-ray diffraction (XRD), Fourier transform infrared spectroscopy and thermogravimetric analysis. XRD analyses showed a co-existence of intercalated and exfoliated zeolite phases. The influence of operational conditions such as exposure time, zeolite loading rate and solution pH were determined. An optimum zeolite loading of 15 wt.% was observed. Solution pH had the greatest influence on the removal of both heavy metals and substituted phenols. The polymer composites exhibited both adsorption and ion-exchange properties in the removal of heavy metals in aqueous media.

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Section: Application Of Thermoplastic/particulate Compositesmentioning

confidence: 99%

Polypropylene–zeolite polymer composites for water purification: synthesis, characterisation and application

Motsa

Msagati

Thwala

et al. 2013

Desalination and Water Treatment

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“…At this temperature about 20 wt% less material is decomposed compared to the corresponding UTG composite. Thus, composite materials with higher thermal stability are produced by introduction of UTG or UTGO fillers, which both act as a barrier to delay the degradation of composites [16,19]. The use of UTGO, leading to additional interactions with the TPU matrix, moderately enhances the thermal stability of the corresponding composite material.…”

Section: More Sensitive Information On What Concerns Possible Interacmentioning

confidence: 99%

“…However, this polymer shows low mechanical strength and poor thermal stability hampering its use in high-temperature applications. The incorporation of carbon nanotubes [10][11][12][13][14][15] and nanoclays [16][17][18] has lead to significant improvements of these polymer characteristics. First publications on graphene based materials (graphene, functionalized graphene, graphene oxide) also report on reinforcing effects in TPU [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Menes

Cano

Benedito

et al. 2012

Composites Science and Technology

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Composites of thermoplastic polyurethane (TPU) and ultra-thin graphite (UTG) with concentrations ranging from 0.5 to 3 wt% were prepared using a solution compounding strategy. Substantial reinforcing effects with increased loadings are achieved. Compared to neat TPU, values for storage modulus and shear viscosity are enhanced by 300 % and 150 %, respectively, for UTG concentrations of 3 wt%. Additionally, an enhancement of thermal properties is accomplished. The crystallization temperature and thermal stability increased by 30 ºC and 10 ºC, respectively, compared to neat TPU. Controlling the oxidation degree, thus offers further possibilities to obtain composites with tailored properties. The presented approach is straightforward, leads to homogeneous TPU-UTG composites with improved materials properties and is especially suitable for commercial UTG materials and further up-scaled production.

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“…Neste trabalho, estudos reológicos realizados com nanocompósitos de diferentes tipos de copoli (etileno-acetato de vinila) com MMT natural e organomodificada demonstraram que quanto menor era a viscosidade do EVA, maior era a tendência de formarem-se nanocompósitos esfoliados enquanto que com maiores viscosidades do EVA, houve uma diminuição no espaço entre as lamelas de argila, muito provavelmente pela saída das moléculas de surfactante orgânico com altas tensões [60] . Estudos de nanocompósitos de poliuretano (PU) desenvolvidos por grupos de pesquisas brasileiros também são encontrados na literatura [61] . Por exemplo, nanocompósitos de PU/MMT foram preparados pelo grupo de Oréfice através da dispersão por solução em meio aquoso, apresentando, pelo acréscimo de 1% em massa de argila, aumento em 20% na tensão de ruptura em relação à resina original [62] .…”

Section: Nanocompósitos Polímero/argila Brasileirosunclassified

Panorama da Pesquisa Acadêmica Brasileira em Nanocompósitos Polímero/Argila e Tendências para o Futuro

2011

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Resumo: A pesquisa em nanocompósitos polímero/argila foi iniciada pela Toyota no final dos anos 80. A partir deste marco, a comunidade científica mundial voltou sua atenção para este tipo de material graças às propriedades mecânicas, químicas e térmicas avançadas em comparação com os compósitos tradicionais. Não foi diferente no Brasil, tal atenção pode ser comprovada pelos inúmeros trabalhos científicos sobre nanocompósitos que começaram a despontar no início do século XXI. Assim, o presente artigo objetiva, após discorrer sobre as definições que concernem nanocompósitos polímero/argila, apresentar as pesquisas científicas brasileiras em nanocompósitos de polímeros de uso geral, de polímeros de engenharia e de outros tipos de polímeros, relacionando-os com o método de produção empregado, morfologia final e propriedades decorrentes da formação de nanocompósitos. Por fim, o mapa da pesquisa brasileira em nanocompósitos polímero/argila e sua perspectiva para o futuro são apresentados. Palavras-chave: Nanocompósito, polímero, argila. Scenario of the Brazilian Academic Research into Nanocomposites Polymer/Clay and Trends for the FutureAbstract: The research on polymer/clay nanocomposites was initiated by Toyota in the late 80s. From then on, the world scientific community has turned its attention to this type of material due to the enhanced mechanical, chemical and thermal properties in comparison to traditional composites. In Brazil, it was not different, as can be seen from the countless scientific works on nanocomposites which have emerged in the early 21 th century. The aim thus is, after discussing the definitions related to the polymer/ clay nanocomposites, to show Brazilian scientific works on the general use of plastics, engineering plastics and other types of polymers, correlating them with their production method, final morphology and resulting properties. Finally, a map of the Brazilian research into polymer/clay nanocomposites and their future perspective are presented. Keywords: Nanocomposite, polymer, clay. IntroduçãoNanocompósitos polímero/argila são uma nova classe de compósitos com matrizes poliméricas onde a fase dispersa é o silicato, constituída por partículas elementares que têm pelo menos uma de suas dimensões da ordem de nanômetros. As partículas minerais mais utilizadas nestes nanocompósitos são as argilas esmectíticas (montmorilonita, saponita e hectorita), tendo as suas partículas morfologia lamelar, com lados da ordem de um micrômetro e espessura de aproximadamente um nanômetro [1] . A camada unitária da montmorilonita (MMT) consiste em três folhas: uma folha octaédrica de hidrargilita-brucita incluídas entre duas folhas tetraédricas de silício e oxigênio (Figura 1). A água e outras moléculas, tais como moléculas orgânicas, podem entrar nas camadas unitárias causando a sua expansão. A distância entre camadas da montmorilonita varia de 9,6 Å, quando nenhuma molécula está entre as camadas unitárias, até quase a separação completa em alguns casos [2] . O interesse na produção de nanocompósito...

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Synthesis and characterization of thermoplastic polyurethane/nanoclay composites

Cited by 32 publications

References 14 publications

Polypropylene–zeolite polymer composites for water purification: synthesis, characterisation and application

Polypropylene–zeolite polymer composites for water purification: synthesis, characterisation and application

The effect of ultra-thin graphite on the morphology and physical properties of thermoplastic polyurethane elastomer composites

Panorama da Pesquisa Acadêmica Brasileira em Nanocompósitos Polímero/Argila e Tendências para o Futuro

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