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Study of the influence of nanoparticles on the performance and the properties of polyamide 6

von Dr. Mohammad Reza Sarbandi

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[1.] Mrs/Fragment 030 08 - Diskussion
Zuletzt bearbeitet: 2015-05-16 13:29:52 Hindemith
Fragment, Gesichtet, Holister et al 2003, Mrs, SMWFragment, Schutzlevel sysop, Verschleierung

Typus
Verschleierung
Bearbeiter
SleepyHollow02
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Untersuchte Arbeit:
Seite: 30, Zeilen: 8-23
Quelle: Holister et al 2003
Seite(n): 5, 6, Zeilen: 5: 23 ff.; 6: 1 ff., 31 ff.
The transition from microparticles to nanoparticles can lead to a number of changes in physical properties. Two of the major factors are the increase in the ratio of surface area to volume, and the size of the particle moving into the area where quantum effects predominate. The increase in the surface area to volume ratio, which is a gradual progression as the particle gets smaller, leads to an increasing dominance of the behavior of atoms located on the surface of a particle over that of those located in the interior of the particle. This affects both the properties of the particle as such and its interaction with other materials. High surface area is a critical factor in the performance of catalysis and structure such as electrodes, allowing improvement in performance of such technologies as fuel cells and batteries. The large surface area of nanoparticles also results in a lot of interaction between the intermixed materials in nanocomposites, leading to special properties such as increased strength and/or increased chemical and heat resistance.

Nanoparticles are currently made out of a very wide variety of materials, the most common of the new generation of nanoparticles being ceramics, which are best split into metal oxide ceramics such as titanium, zinc, aluminum and iron oxide, to name a prominent few, and silicate nanoparticle [108, 109].


[108] F. Luis, E. Mauricio, L.L. Betty, Macromol. Symp. 2007, 258, 119–128

[109] B. Salima, B. Elodie, Z. Nathalie, Macromol. Rapid Commun. 2005, 26, 1860–1865,

The transition from microparticles to nanoparticles can lead to a number of changes in physical properties. Two of the major factors in this are the increase in the ratio of surface area to volume, and the size of the particle moving into the realm where quantum effects predominate.

The increase in the surface-area-to-volume ratio, which is a gradual progression as the particle gets smaller, leads to an increasing dominance of the behavior of atoms on the surface of a particle over that of those in the interior of the particle. This affects both the properties of the particle in isolation and its interaction with other materials. High surface area is a critical factor in the performance of catalysis and structures such as electrodes, allowing improvement in performance of such technologies as fuel cells and batteries. The

[page 6]

large surface area of nanoparticles also results in a lot of interactions between the intermixed materials in nanocomposites, leading to special properties such as increased strength and/or increased chemical/heat resistance.

[...]

Nanoparticles are currently made out of a very wide variety of materials, the most common of the new generation of nanoparticles being ceramics, which are best split into metal oxide ceramics, such as titanium, zinc, aluminum and iron oxides, to name a prominent few, and silicate nanoparticles (silicates, or silicon oxides, are also ceramic), generally in the form of nanoscale flakes of clay.

Anmerkungen

The source is not given.

Sichter
(SleepyHollow02), Hindemith


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