Preparation of a New Nanocomposite of Al0.33Mg0.67(OH)2(C12H25SO4)0.33 and Poly(ethylene oxide)

Bubniak, G.A.; Schreiner, W. H.; Mattoso, N.; Wypych, Fernando

doi:10.1021/la011748d

Cited by 62 publications

(35 citation statements)

References 24 publications

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“…Recently several classes of synthetic inorganic/organic compounds structurally similar to natural smectite clays have emerged as potential fire retardants [17], [18], accessed by following the link in the citation at the bottom of the page.…”

Section: Introductionmentioning

confidence: 99%

Nanostructured layered copper hydroxy dodecyl sulfate: A potential fire retardant for poly(vinyl ester) (PVE)

Kandare

Chigwada

Wang

et al. 2006

Polymer Degradation and Stability

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Abstract:Composites of poly(vinyl ester) (PVE) with copper hydroxy dodecyl sulfate (CHDS) were prepared by thermal curing. The efficiency of the additive, CHDS, in reducing flammability is demonstrated via cone calorimetry and thermogravimetric analysis (TGA). The addition of 1-10% by mass of the CHDS additive resulted in significant increments in char formation (∼4-11%) from thermogravimetric analysis (TGA). Incorporation of the CHDS into the polymer matrix at these low concentrations leads to substantial reductions in the total heat release (∼20-30%) but no significant change in the peak heat release rate. The composite materials generally ignite more quickly, however, the flame extinguishes faster for the composites relative to the virgin polymer. X-ray diffraction (XRD) and infrared spectroscopic analyses of the residues collected at various stages during thermal decomposition of the composites, suggest the participation of copper-containing species in promoting enhanced thermal stability of PVE.

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Section: Introductionmentioning

confidence: 99%

Nanostructured layered copper hydroxy dodecyl sulfate: A potential fire retardant for poly(vinyl ester) (PVE)

Kandare

Chigwada

Wang

et al. 2006

Polymer Degradation and Stability

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“…As linhas de pesquisa são as mais variadas e têm alcançado índices de impacto muito expressivos. Dentre os artigos mais citados no levantamento realizado no ISI, foram encontrados principalmente estudos nas áreas de nanomateriais magnéticos 28,29 , química e nanomateriais supramoleculares [30][31][32][33][34][35][36][37] , nanocompósitos de polímeros e óxi-dos de metais de transição (principalmente nanopartículas e óxidos lamelares) [38][39][40][41][42] , nanoencapsulamento 43 , nanotubos de carbono 44,45 ; filmes, interfaces e dispositivos 34,35,37,46,47 e células solares [48][49][50] . Essas contribuições são brevemente comentadas abaixo.…”

Section: Principais Linhas E Contribuiçõesunclassified

“…Material análogo foi preparado pela técnica camada por camada de modo a maximizar a interação entre polianilina e V 2 O 5 , promovendo efeitos cooperativos que aumentaram a capacidade de carga do material na forma de filme 42 . Nanocompósitos do hidróxido duplo lamelar Al 0.33 Mg 0.67 (OH) 2 (C 12 H 25 SO 4 ) 0.33 ·0,64H 2 O com poli-óxido de etileno foram obtidos e caracterizados por diversas técnicas indicando que o material apresenta estrutura ordenada, e dodecilsulfato intercalado no espaço interlamelar 38 . Por outro lado, também foram preparados materiais híbridos orgânico/inorgânicos contendo dióxidos de titânio e de estanho e polianilina pelo método sol-gel.…”

Section: Figura 2 A) Gráficos Mostrando O Número De Publicações E B)unclassified

Estratégia supramolecular para a nanotecnologia

Araki¹

2007

Quím. Nova

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SUPRAMOLECULAR APPROACH TO NANOTECHNOLOGY. Brazilian science is evolving rapidly and steadly in the last 10 years, reaching the 15º place in the international ranking. Research in nanotechnology is following a similar way generating new scientific and technological knowledge in several frontiers but specially in the interfaces of two or more areas, where Chemistry is consolidating itself as a central science. In this context, the supramolecular approach is a very promissing one because it allows the build-up of a chemical inteligence using all the sistematized knowledge for the design and development of new nanomaterials and products. The great challenge of Chemistry is not decrease the dimensionality of the materials but instead find ways to increase the dimensionality and structural complexity keeping strict control on the interactions between the components, in order to generate materials with new properties and functionalities. Unfortunately, the current vigorous advancement of scientific research has not been followed by the transformation of such knowhow into patents and produts. Therefore much efforts should be devoted to build a national science and technology program, joining all the segments of the society involved in the technological development (university, institutes of technological research, industry and government) in order to promote the furtherance of the Brazilian technological base. Only in this way it is possible to evolve to a technological society capable to transform the scientific knowledge into wealthy, thus sustaining the socioeconomic development of the country.Keywords: nanotechnology; supramolecular approach; nanomaterials. INTRODUÇÃOCiência e tecnologia sempre andam lado a lado e dependem do desenvolvimento técnico dos instrumentos de medida, de observação, de análise e de produção, que são utilizados de maneira integrada para desenvolver novos produtos. Assim, os estudos da física e da biologia baseavam-se em materiais de dimensões macroscópicas. Porém, o aperfeiçoamento e desenvolvimento constante da instrumentação, principalmente a partir de meados do século passado, tornaram possível o estudo dos materiais em escalas cada vez menores, chegando à escala nano (Figura 1). Essa estratégia possibilitou a diminuição progressiva dos dispositivos de estado sólido, provocando um aumento extraordinário do número de dispositivos que podem ser acomodados numa mesma área. Outra conseqüência foi a diminuição do consumo de energia e a possibilidade de integração de um número sempre crescente de dispositivos, tal que a capacidade dos processadores dobrou a cada 24 meses (Lei de Moore) nos últi-mos 40 anos. Atualmente um processador de última geração como o Intel Itanium de duplo processador contém mais de 1x10 9 transistores (http://www.intel.com/technology/mooreslaw/index.htm).Comportamento similar pode ser observado no caso da biologia, que iniciou com a sistematização dos organismos vivos pelos seus fenótipos e atualmente estuda a base molecular dos processos biológicos e de sua expressão....

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“…Layered inorganic/organic hybrids, including smectite clays such as montmorillonite (MMT), hectorite (HET), and magadiite (MGH), and synthetic layered hydroxides like layered hydroxy salts (LHSs), layered double hydroxides (LDHs), and hydroxy double salts (HDSs), have recently emerged as potential fire retardants [10][11][12][13][14][15][16]. Organicinorganic polymer nanocomposites have superior properties, such as increased thermal stability, heat resistance, mechanical strength and reduced permeability and moisture absorption, compared to the virgin polymer [17].…”

Section: Introductionmentioning

confidence: 99%

Probing synergism, antagonism, and additive effects in poly(vinyl ester) (PVE) composites with fire retardants

Kandare

Chigwada

Wang

et al. 2006

Polymer Degradation and Stability

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Abstract:Potential fire retardants, including copper hydroxy dodecyl sulfate (CHDS), organically-modified montmorillonite (Cloisite 15A), and resorcinol di-phosphate (RDP), were added to pure poly(vinyl ester) (PVE) individually or in combinations at low concentration formulations. Thermogravimetric analysis and cone calorimetry were used to study the thermal stability and fire performance of the composites. Synergistic, antagonistic, and additive effects were observed depending on the specific formulation. Time to selfsustained combustion is greatly reduced, but the flame extinguishes faster, for the composites containing CHDS alone or in combination with either RDP or Cloisite 15A compared to the virgin polymer. The presence of copper in PVE composites containing additive, CHDS, may be responsible for the enhanced thermal stability and fire performance.

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Preparation of a New Nanocomposite of Al_0.33Mg_0.67(OH)₂(C₁₂H₂₅SO₄)_0.33 and Poly(ethylene oxide)

Cited by 62 publications

References 24 publications

Nanostructured layered copper hydroxy dodecyl sulfate: A potential fire retardant for poly(vinyl ester) (PVE)

Nanostructured layered copper hydroxy dodecyl sulfate: A potential fire retardant for poly(vinyl ester) (PVE)

Estratégia supramolecular para a nanotecnologia

Probing synergism, antagonism, and additive effects in poly(vinyl ester) (PVE) composites with fire retardants

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