Use of Natural and Modified Natural Nanostructured Materials

Zimmer, André; Andrade, Mário de; Sánchez, Felipe Antônio Lucca; Takimi, Antônio Shigueaki

doi:10.1007/978-3-642-19131-2_11

Cited by 4 publications

(3 citation statements)

References 31 publications

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“…Currently, there are few processes to extract nanoclay from a layered clay [26,27]. Montmorillonite, is a smectite clay material derived from bentonite ore [28], is the most common natural nanomineral used by industry [29]. Majority of the clays present a layered structure, which consists of a Silica tetrahedron connected to an alumina octahedron, coordinated by oxygen atoms or hydroxyl groups, with the overall thickness of a single layer approaching one nanometer [30].…”

Section: Introductionmentioning

confidence: 99%

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

et al. 2019

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This review addresses the effects of the modifications with nanomaterials, particularly nanosilica, nanoclays, and nanoiron, on the mechanical performance and aging resistance of asphalt mixtures. The desire for high-performance and long-lasting asphalt pavements significantly pushed the modification of the conventional paving asphalt binders. To cope with such demand, the use of nanomaterials for the asphalt binder modification seems promising, as with a small amount of modification an important enhancement of the asphalt mixture mechanical performance can be attained. Several studies already evaluated the effects of the modifications with nanomaterials, mostly focusing on the asphalt binder properties and rheology, and the positive findings encouraged the study of modified asphalt mixtures. This review focuses on the effects attained in the mechanical properties of the asphalt mixtures, under fresh and aged conditions. Generally, the effects of each nanomaterial were evaluated with the current state-of-art tests for the characterization of mechanical performance of asphalt mixtures, such as, permanent deformation, stiffness modulus, fatigue resistance, indirect tensile strength, and Marshall stability. Aging indicators, as the aging sensitivity, were used to evaluate the effects in the asphalt mixture’s aging resistance. Finally, to present a better insight into the economic feasibility of the analyzed nanomaterials, a simple cost analysis is performed.

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Section: Introductionmentioning

confidence: 99%

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

et al. 2019

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“…), for example, as components of seats, doors, panels, or in interior parts or in car boots: in Mercedes-BenzA-Class car there are 27 components consisting of vegetable fibers [305]. Information about synthesis, structure and properties of these modified natural materials is very expansive (see, for example, [306][307][308]). We shall just note that nanocellulose, nanostructural materials (such as halloysite clay nanotubes, modified betonites and montmorillonites) are examples of commercialized organic-inorganic hybrid bionanomaterials [309,310].…”

Section: Nanocomposites Based On Polysaccharidesmentioning

confidence: 99%

Bionanocomposites Assembled by “From Bottom to Top” Method

Pomogailo

Джардималиева

2014

Nanostructured Materials Preparation via Condensation Ways

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Particles, which take part in different biological processes, have a special place in nanometer composites. Rich and variable biochemistry of proteins displays key importance of a nanometer phenomenon for a working mechanism of living organisms [1,2], and this provides a wide range of possibilities for development of new types of hybrid nanomaterials with constructible structures, functions and shapes [3][4][5].Integration of nanoparticles and biomolecules, each having unique properties, on the one hand, and being in the same nanometer scale (enzymes, antigens, and antibodies of typical sizes 2-20 nm like nanoparticles), on the other hand, as of two structurally compatible classes of materials, gives resultant new hybrid nanomaterials with synergetic properties and functions (Fig. 7.1).Interaction of nanoparticles with biopolymers (proteins, nucleic acids, polysaccharides) plays very important role in enzyme catalysis, biosorption, biohydrometallurgy, geobiotechnology, etc.). There is a great interest to nanomaterials, which can be used in biomedical and pharmaceutical applications due to their biocompatibility and biodegradation. At the same time bionanocomposites should meet some demands to plasticity of a matrix, they should have improved barrier, antimicrobial properties, ability to controlled release of bioactive substances such as antimicrobial agents, antioxidants, drugs, calcium compounds in biologically available form and their mixtures, etc. Biopolymers, such as natural and synthetic proteins, obtained by chemical methods or by genetic modification of microorganisms or plants, nucleic acids (including synthetic ones), biodegraded complex polyethers, such as polylactic acid, and its derivatives, oligo-hydroxyalkanoate, most often, polyhydroxybutyrate, their copolymers, biomedical materials, such as hydroxyapatites, are used. There is an interesting group of materials for this purpose including synthetic and natural (vegetable and animal) polysaccharides, such as cellulose and its derivatives, alginates, dextranes, acacia gum, chitosan, and any of its natural and synthetic derivatives, especially chitosan acetate, and proteins obtained from raw animal materials, as well as proteins from maize (especially zein) or soya, gluten derivatives, gelatin, casein, etc. Relatively widely used in

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“…Montmorillonite (MMT) is one of the most intensively explored natural nanostructure materials in nanotechnology [27]. MMT is a famous phyllosilicate from the subgroup of smectite clays, and for its unique physical and chemical properties has recently re-received more attention.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the colloidal montmorillonite dispersion as a low-cost and eco-friendly nanofluid for improving thermal performance of plate heat exchanger

Hosseini

Mirzaei

2020

SN Appl. Sci.

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Synthetic nanofluids are produced by expensive and complex procedures which hinders their large-scale application in thermal systems. In this study the montmorillonite clay as a natural nanostructure material with a high dispersion ability has been introduced for achieving low cost and eco-friendly water-based green nanofluid. For this purpose, a set of montmorillonite nanofluids (MMTNFs) with different weight fractions of 0.2, 0.4, 0.6, 0.8, and 1% was mechanically prepared. The concentration-dependent properties of the samples including stability, thermal conductivity and viscosity were experimentally evaluated. The results indicated that MMTNFs were accompanied by a primary instability, but they gradually possessed excellent long-term stability. Adding montmorillonite to the water could enhance thermal conductivity up to 8.3%, which is worth with considering the naturalness, abundance and low-cost of this clay. MMT-NFs exhibited excellent thermal performance when utilized as a working fluid instead of the pure water in a plate heat exchanger (PHE). The results showed that the best performance of PHE was obtained at an optimum MMT concentration (0.6 wt%). At optimal condition, the overall heat transfer coefficient, heat transfer rate, and thermal efficiency improved 27.25%, 17.65%, and 7.82%, respectively.

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Use of Natural and Modified Natural Nanostructured Materials

Cited by 4 publications

References 31 publications

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

A Review of Nanomaterials’ Effect on Mechanical Performance and Aging of Asphalt Mixtures

Bionanocomposites Assembled by “From Bottom to Top” Method

Assessment of the colloidal montmorillonite dispersion as a low-cost and eco-friendly nanofluid for improving thermal performance of plate heat exchanger

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