Effects of dispersion and orientation of nanorods on electrical networks of block copolymer nanocomposites

Zhang, Shuaichao; Feng, Yangcong; Ning, Nanying; Zhang, Liqun; Mi, Jianguo

doi:10.1016/j.commatsci.2016.12.010

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…10 shows the tendency of the reinforcing effect. In addition, the influence of distribution and agglomeration of nano fillers on the interface and nanocomposites have been analyzed [10][11][12][13], which is performed mainly by CG models with many nano fillers inserted. Also, qualitative analysis of the diffusion and the conformation of polymer chains occurring in polymer nanocomposites is conducted.…”

Section: Current Molecular Dynamics Modelsmentioning

confidence: 99%

Recent Studies on the Multiscale Analysis of Polymer Nanocomposites

Chung

Cho

2019

Multiscale Sci. Eng.

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Ever since several formations of polymer-based nanocomposites were reported, research on their modeling, characterization, and computerized analysis methodology has been extensively investigated to become a major academic field of advanced material science and technology. This paper mainly summarizes the multiscale computational analysis methodology for polymer nanocomposites. We also introduce various computational modeling approaches to characterizing the physical behavior of polymer nanocomposites, which are the molecular dynamics approach, and the continuum approach. Based on the various computational analyses, we summarize how the material properties and phenomenological behaviors of polymer nanocomposites were analyzed.

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Section: Current Molecular Dynamics Modelsmentioning

confidence: 99%

Recent Studies on the Multiscale Analysis of Polymer Nanocomposites

Chung

Cho

2019

Multiscale Sci. Eng.

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“…In addition to mechanical properties, functional properties, such as electrical and thermal conductivity, are also expected to be influenced by the degree of orientation of the nanocomposite. 19,20 CNT alignment is commonly obtained by external forces, such as electric or magnetic fields, and shear forces, as in melt processing. 21 The morphology of block copolymers can also be aligned during melt processing, especially when they present cylindrical and lamellar structures.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Thus, the degree of orientation of these nanomaterials is an essential factor in the formation of the conductive network. In addition to mechanical properties, functional properties, such as electrical and thermal conductivity, are also expected to be influenced by the degree of orientation of the nanocomposite. , CNT alignment is commonly obtained by external forces, such as electric or magnetic fields, and shear forces, as in melt processing …”

Section: Introductionmentioning

confidence: 99%

Electrical Conductivity and In Situ SAXS Probing of Block Copolymer Nanocomposites Under Mechanical Stretching

Sousa

Heinze

Sacramento

et al. 2023

ACS Appl. Mater. Interfaces

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Elastomers based on block copolymers can self-organize into ordered nanoscale structures, making them attractive for use as flexible conductive nanocomposites. Understanding how ordered structures impact electrical properties is essential for practical applications. This study investigated the morphological evolution of flexible conductive elastomers based on polystyrene-b-poly(ethylene-co-butylene)-b-polystyrene (SEBS) block copolymers with aligned single- or multi-wall carbon nanotubes (SWCNTs or MWCNTs) and their electrical conductivity under large deformations. Oriented nanocomposites were obtained through injection molding and characterized using two different setups: tensile testing monitored by in situ small-angle X-ray scattering (SAXS) and tensile testing with simultaneous electrical conductivity measurements. Our findings demonstrate that structural orientation significantly influences electrical conductivity, with higher conductivity in the longitudinal direction due to the preferred orientation of carbon nanotubes. Tensile testing demonstrated that carbon nanotubes accelerate the process of realignment of the ordered structure. As a consequence, higher deformations reduced the conductivity of samples with longitudinal alignment due to the disruption of percolation contacts between nanotubes, while in samples with a transverse alignment the process promoted the formation of a new conductive network, increasing electrical conductivity.

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“…[12][13][14][15][16] In particular, the addition of anisotropic nanoparticles (such as nanorods) to polymeric materials can be beneficial and increase their photoelectric characteristics, optical properties and mechanical properties. [17][18][19][20][21][22][23] The nanorods of noble metals (such as gold) and semiconductors (such as CdSe) possess interesting photoelectrical properties and can significantly improve the efficiency of polymer photovoltaic devices by enhancing their carrier mobilities. [24] In addition, the alignment of nanorods and nanowires plays an important role in determining the electrical conductivity of polymer nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Phase transition of a diblock copolymer and homopolymer hybrid system induced by different properties of nanorods

et al. 2018

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We investigated phase transitions in a diblock copolymer-homopolymer hybrid system blended with nanorods (NRs) by using the time-dependent Ginzburg-Landau theory. We systematically studied the effects of the number, length and infiltration properties of the NRs on the self-assembly of the composites and the phase transitions occurring in the material. An analysis of the phase diagram was carried out to obtain the formation conditions of sea island structure nanorodbased aggregate, sea island structure nanorod-based dispersion, lamellar structure nanorod-based multilayer arrangement and nanowire structure. Further analysis of the evolution of the domain sizes and the distribution of the nanorod angle microphase structure was performed. Our simulation provides theoretical guidance for the preparation of ordered nanowire structures and a reference to improve the function of a polymer nanocomposite material.

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Effects of dispersion and orientation of nanorods on electrical networks of block copolymer nanocomposites

Cited by 4 publications

References 43 publications

Recent Studies on the Multiscale Analysis of Polymer Nanocomposites

Recent Studies on the Multiscale Analysis of Polymer Nanocomposites

Electrical Conductivity and In Situ SAXS Probing of Block Copolymer Nanocomposites Under Mechanical Stretching

Phase transition of a diblock copolymer and homopolymer hybrid system induced by different properties of nanorods

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