Preparation of natural rubber–montmorillonite nanocomposite in aqueous medium: evidence for polymer–platelet adhesion

Valadares, Leonardo Fonseca; Leite, Carlos A. P.; Galembeck, Fernando

doi:10.1016/j.polymer.2005.11.062

Cited by 93 publications

(59 citation statements)

References 21 publications

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“…Pristine Mt was dispersed in a NR latex, observing an increase of modulus for the obtained nanocomposite up to 30 phr of clay, in the presence of worse ultimate properties [41], as well as higher 300% stress, shore A hardness, tensile strength and tear strength, when Mt was at 20 phr level [29]. In a SBR matrix as well, tensile and tear strengths were improved by adding a pristine Mt via emulsion blending, up to 20 phr [29], without any improvement for a further addition [35].…”

Section: The Improvement Of Rubber Mechanical Properties Thanks To Thmentioning

confidence: 98%

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Rubber Clay Nanocomposites

Galimberti¹

2012

Advanced Elastomers - Technology, Properties and Applications

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Section: The Improvement Of Rubber Mechanical Properties Thanks To Thmentioning

confidence: 98%

“…adding further ingredients by melt mixing and avoiding the use of coagulating agents, with NR as the rubber [40] iii. avoiding both coagulating agents and the addition of further ingredients, with NR as the rubber [41].…”

Section: Emulsion Blending From a Pristine Claymentioning

confidence: 99%

Rubber Clay Nanocomposites

Galimberti¹

2012

Advanced Elastomers - Technology, Properties and Applications

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“…33 Proteins and phospholipids probably contribute to particle-rubber adhesion thanks to their amphiphilic character and to electrostatic adhesion that will be presented ahead. This is emulated in the laboratory or in the chemical plant by making nanocomposites, starting from synthetic and natural rubber latexes following the "latex route", this means: mixing aqueous Na-montmorillonite clay to rubber latex, blending and drying, 34 as shown in Figure 10. Figure 10.…”

Section: Natural Rubbermentioning

confidence: 99%

“…TEM micrographs of Na + -montmorillonite and natural rubber composite (NaMMT-NR). The thin cuts were made normal to the nanocomposite film plane 34 Most interesting, the mechanical properties of the clay-synthetic latex nanocomposites depend on the clay counterions as an evidence of electrostatic adhesion between clay lamellae and rubber. Detailed examination of polymer-clay nanocomposites prepared by the latex route allowed the development of a mechanism for nanocomposite formation and stability that is depicted in Figure 13.…”

Section: Natural Rubbermentioning

confidence: 99%

Perspectives for Biomass Production and Use in Brazil

Galembeck

2017

Rev. Virtual Quim.

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Resumo: O uso de biomassa como uma fonte de energia e de matérias-primas industriais tem crescido, mas com oscilações associadas aos preços do petróleo. Uma frequente objeção ao uso da biomassa como fonte de energia e matérias-primas é a competição com a produção de alimentos, aumentando seus preços e reduzindo a segurança alimentar global. A experiência brasileira das últimas quatro décadas e a recente experiência da Etiópia mostram a possibilidade de se criar sinergias no uso de solo agrícola para múltiplas finalidades. No Brasil, os esforços de produção de combustíveis de biomassa, o álcool e o biodiesel, ocorreram em paralelo com um grande aumento na produção de alimentos e com um aumento relativamente menor na área cultivada. Isso só foi possível graças a um grande aporte de novas tecnologias. O aumento na produção de alimentos produz grandes quantidades de resíduos que são novas oportunidades para P&D. A produção sinérgica de alimentos, energia e matérias-primas é um fator decisivo na busca da sustentabilidade. Palavras-chave:Combustível; alimentos; uso da terra; biomassa; energia renovável; Produtividade vegetal; cana-de-açúcar. AbstractThe use of biomass as a source of energy and raw materials shows an overall growing trend with ups and downs related to oil prices that are in turn heavily affected by political and strategic factors. A frequent objection to the growing use of biomass as a source of energy and raw materials is its competition with food production, decreasing global food security. The Brazilian experience from the past four decades and the recent experience from Ethiopia show that synergies are created by the multipurpose use of agricultural land. In Brazil, the energy push took place in parallel with a large increase in food supply and a relatively small increase in the used land, thanks to technological inputs. A side product of increased food production is the growing amount of biomass residues that are by themselves new opportunities for R&D. Synergic production of food, energy and raw materials are presented as essential features of the roadmap to sustainability.

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“…Scientific effort has been done to modify the mechanical properties of natural rubber without vulcanization. Many composite formulations have been studied using clays [26] and natural fibers [27].…”

Section: Natural Rubbermentioning

confidence: 99%

Biobased fibers and materials in Brazil

Valadares

2014

Chem. Biol. Technol. Agric.

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The human evolution is directly associated to the use of materials. During the last century, humanity had significant development powered by the use of fossil resources, which largely impacted the materials discovery and use. However, there are many concerns about the use of fossils, based mainly on economic and environmental issues. These concerns motivate the study, development, and use of renewable resources, including biobased materials. Brazil is one of the largest producers of agricultural commodities, which can be used to produce renewable materials. This review describes actual production of some renewable materials in Brazil and future possibilities to generate them using biomass residual streams of industrial processes.

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Preparation of natural rubber–montmorillonite nanocomposite in aqueous medium: evidence for polymer–platelet adhesion

Cited by 93 publications

References 21 publications

Rubber Clay Nanocomposites

Rubber Clay Nanocomposites

Perspectives for Biomass Production and Use in Brazil

Biobased fibers and materials in Brazil

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