Description of the degree of reinforcement of polymer/carbon nanotube nanocomposites in the framework of percolation models

Микитаев, А. К.; Козлов, Г. В.

doi:10.1134/s1063783415050224

Cited by 29 publications

(14 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Авторы [7] показали, что в случае перколяционных кластеров их критические индексы для первого, второго и третьего подмножеств связаны с фрактальной размерностью этих кластеров d f следующими соотношениями:…”

Section: результаты и обсуждениеunclassified

“…Напомним, что и структура полимерной матрицы [8], и каркас нанонаполнителя выше порога перколяции [9] являются перколяционными системами. Из уравнений (1)-(3) следует, что универсальность критических индексов перколяционной системы связана с её фрактальной размерностью [7].…”

Section: результаты и обсуждениеunclassified

“…Авторы [7] также конкретизировали указанные выше подмножества применительно к структуре полимерных композитов следующим образом: первым подмножеством (n = 1) являются межфазные области, вторым (n = 2) -совокупность межфазных областей и наполнителя и третьим (n = 4) -собственно наполнитель.…”

Section: результаты и обсуждениеunclassified

“…Общее перколяционное соотношение для определения степени усиления нанокомпозитов Е н /Е м , где Е н и Е м -модули упругости нанокомпозита и матричного полимера соответственно, имеет следующий вид [7]:…”

Section: результаты и обсуждениеunclassified

See 3 more Smart Citations

The fractal model of reinforcement of nanocomposites polymer/carbon nanotubes with ultrasmall concentrations of nanofiller

Козлов

Долбин

Койфман³

2019

Доклады Академии наук

Self Cite

View full text Add to dashboard Cite

The structural aspects, defining reinforcement degree (enhancement of elasticity modulus) of nanocomposites polymer/carbon nanotubes with ultrasmall concentrations of nanofiller, were considered. It has been shown that the indicated parameter is controlled by two factors, namely, structure of nanocomposite and type of reinforcing component. Introduction of nanofiller in matrix polymer changes its structure in virtue of formation of interfacial regions. Hence, the efficiency of nanofiller as reinforcing element is defined by its ability to generate interfacial regions.

show abstract

Section: результаты и обсуждениеunclassified

See 2 more Smart Citations

The fractal model of reinforcement of nanocomposites polymer/carbon nanotubes with ultrasmall concentrations of nanofiller

Козлов

Долбин

Койфман³

2019

Доклады Академии наук

Self Cite

View full text Add to dashboard Cite

show abstract

“…In fact, the reinforcing material needs to reach a certain level to make it the predominant factor of mechanical properties contribution (Mikitaev and Kozlov, 2015). This critical value which makes the ultimate mechanical properties dependant on reinforcing filler content is referred as percolation threshold.…”

Section: Introductionmentioning

confidence: 99%

Highly functional green materials platform: Starch-ionic liquid-carbon nanotube polymer melt nanocomposites

Liu¹

View full text Add to dashboard Cite

Starch is a promising biodegradable polymer material which has attracted attention recently. A renewable and biodegradable resource can potentially address the shortage of conventional petroleum-based polymers and help solve the problem of environmental pollution from the use of these polymers. To use starch in polymer processing, gelatinisation, which is the process to disrupt the native starch structure, must happen to turn the starch in to an amorphous thermoplastic starch (TPS). However, water, the conventional gelatinisation agent and plasticiser, is extremely volatile and will evaporate during thermal processing. This leads to high melt viscosities, processing difficulties and hence poor product quality. In addition the mechanical properties of the resulting TPS products are not as high as that of the currently used petroleum-based polymers that they seek to replace.Therefore, potential solutions for TPS processing and application development is to use other plasticisers to aid processing and/or to reinforce TPS with nano-particles. One of the key tasks of this project was to understand the plasticizing effects of ionic liquids (ILs) in TPS processing and interpreting these in terms of the molecular interactions between the components. In addition the role of adding nano-particles, in the form of carbon nanotubes, in an attempt to strengthen TPS was investigated. The ultimate aim was to provide design guidelines to produce high value added biodegradable nanocomposites.Three types of ionic liquids (ILs) were considered: 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]), 1-allyl-3-methylimidazolium chloride ([Amim]Cl) and 1-butyl-3-methylimidazolium chloride ([Bmim]Cl). They were processed in batches of 150g by thermal mixing. Their behaviours were compared to glycerol as plasticisers of TPS, and their effects on TPS processing, water uptake during conditioning, mechanical properties, thermal stabilities, crystallisation behaviour and molecular interaction were studied. Both spectroscopic and X-ray analysis techniques were used to investigate the interactions that occurred, and these were related to the material characteristics. Then, multi-walled carbon nanotubes (MWCNTs) were introduced to the TPS matrix to investigate their behaviour as a strengthening agent and also to potentially create a functional material with useful electrical properties.The results demonstrated that the ILs were effective plasticisers for TPS. However, whilst their use improved the flexibility of TPS, mechanical strength and thermal stability were decreased.The molecular interactions between TPS and ILs were found to differ between TPS and glycerol. This led to differences in the crystalline structures formed, 2% to 4% more water Page | iii uptake during conditioning and hence up to a 90% decrease in Young's modulus. In particular the effect of water uptake during conditioning was identified as the key contributor to the ultimate mechanical properties. The IL plasticised TPS were also found to be less thermally stable.In or...

show abstract

The Impact of the Real Anisotropy Level of Carbon Nanotubes on the Degree of Reinforcement of Polymer Nanocomposites

Козлов

Долбин

2017

Russ Phys J

View full text Add to dashboard Cite

Description of the degree of reinforcement of polymer/carbon nanotube nanocomposites in the framework of percolation models

Cited by 29 publications

References 12 publications

The fractal model of reinforcement of nanocomposites polymer/carbon nanotubes with ultrasmall concentrations of nanofiller

The fractal model of reinforcement of nanocomposites polymer/carbon nanotubes with ultrasmall concentrations of nanofiller

Highly functional green materials platform: Starch-ionic liquid-carbon nanotube polymer melt nanocomposites

The Impact of the Real Anisotropy Level of Carbon Nanotubes on the Degree of Reinforcement of Polymer Nanocomposites

Contact Info

Product

Resources

About