The effect of filler functionalization on dispersion and thermal conductivity of polypropylene/multi wall carbon nanotubes composites

Patti, Antonella; Russo, Pietro; Acierno, Domenico; Acierno, Stefano

doi:10.1016/j.compositesb.2016.03.072

Cited by 72 publications

(33 citation statements)

References 40 publications

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“…As an example, the experimental thermal conductivities of MWCNT@PP are shown in Fig. 16 [166]. The thermal conductivity exhibits a non-monotonic trend as a function of the filler concentration.…”

Section: Nanocomposites Without An Inter-filler Networkmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

670

391

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Polymers are widely used in industry and in our daily life because of their diverse functionality, light weight, low cost and excellent chemical stability. However, on some applications such as heat exchangers and electronic packaging, the low thermal conductivity of polymers is one of the major technological barriers. Enhancing the thermal conductivity of polymers is important for these applications and has become a very active research topic over the past two decades. In this review article, we aim to: 1). systematically summarize the molecular level understanding on the thermal transport mechanisms in polymers in terms of polymer morphology, chain structure and inter-chain coupling; 2). highlight the rationales in the recent efforts in enhancing the thermal conductivity of nanostructured polymers and polymer nanocomposites. Finally, we outline the main advances, challenges and outlooks for highly thermal-conductive polymer and polymer nanocomposites. the inter-chain coupling. Fig. 1 Schematic diagrams of a polymer: (a) the morphology of a polymer consisting of crystalline and amorphous domains; (b) structure of a polymer chain.In addition to engineering the morphology of polymer chains, another common method to enhance the thermal conductivity of polymers is to blend polymers with highly thermal conductive fillers. The progress of nanotechnology over the last two decades not only provides more diverse high thermal conductivity fillers of different material types and topological shapes but also advances the understanding at the nanoscale. Fig. 2 shows a sketch of a polymer nanocomposite to illustrate the thermal transport mechanisms. In general, there are two types of polymer nanocomposites depending on whether nano-fillers form a network or not. When the filler concentration is low, no inter-filler networks could be formed, as shown in Fig. 2(a). The thermal conductivity is essentially determined by the filler-matrix coupling, i.e, interfacial thermal resistance, and the concentration and the geometric shapes of fillers. When the filler concentration is large enough, high conductivity fillers might form thermally conductive networks, as shown in Fig. 2(b). Although nanocomposites with filler network could possess a higher thermal conductivity than that without a network, their thermal conductivity could still be low due to the large inter-filler thermal contact resistance. Recently, three-dimensional fillers, such as carbon and graphene foams, have drawn a lot of attention. The fundamental thermal transport mechanisms and recent synthesis efforts in both types of nanocomposites are reviewed.This review article is organized as follows. In Section 2, we introduce the experimental progress on the enhancement of thermal conductivity by aligning polymer chains, and then review the methods to further tune the thermal conductivity by engineering chain structure and inter-chain coupling, as illustrated in Fig. 3(a). In Section 3, we discuss the thermal conductivity of polymer nanocomposites both with and without inter...

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Section: Nanocomposites Without An Inter-filler Networkmentioning

confidence: 99%

Thermal conductivity of polymers and polymer nanocomposites

Huang

Qian

Yang

2018

Materials Science and Engineering: R: Reports

670

391

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“…Patti et al [56] studied the effect of filler functionalization on dispersion and TC of PP-based composites by adding, in the same resin grade, three different chemically treated surfaces (amino-and carboxyl-functionalized, and pristine one) CNTs. A cubic polynomial trend of the TC as a function of the filler concentration was found, for all three families of nanocomposites.…”

Section: Effect Of Functionalizationmentioning

confidence: 99%

Thermal Conductivity of Polypropylene-Based Materials

Patti¹,

Acierno²

2020

Polypropylene - Polymerization and Characterization of Mechanical and Thermal Properties

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In this work, the authors aimed to provide an overview about the thermal conductivity of polypropylene, of its related compounds and the main methods of measurement. The growing spread of polypropylene in the industrial world together with the increasing demand of thermally conductive plastics represented the driving force of studying the heat transport in the polypropylene, and of recent progress and development of the thermal conduction in polypropylene-based materials. At regard, the common approach has been devoted to fill the polymer with thermally conductive materials: metallic, carbon based, ceramic and mineral fillers have been taken into account depending on the need to preserve electrical insulation, lightweight, production increasing or cost saving in the final compositions. Different parameters have been considered in order to optimize the ultimate thermal performances in the realized composites: (i) filler dispersion, (ii) filler/ matrix and filler/filler interactions. The introduction of functional groups on the filler surface or in the polymer chain has been tested for acting on the dispersion and on the interfacial interaction. Then, hybrid materials, consisting in two particles different in size and shape combined with the attempt to realize a synergistic effect and to support a conductive network in the matrix, have been investigated.

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“…In view of the recent research attention to carbon nanotubes, given their intrinsic high thermal conductivity (3000 W/m K), as fillers in the realization of thermally conductive plastics, we have, in a recent work, verified the improvements of heat conduction in PP by adding CNTs . Nevertheless, the inherently high electrical conductivity of the above nanoparticles limits the use in applications requiring thermally conductive and contemporary electrically insulating materials.…”

Section: Introductionmentioning

confidence: 91%

Thermal conductivity and dielectric properties of polypropylene‐based hybrid compounds containing multiwalled carbon nanotubes

Russo

Patti

Petrarca

et al. 2018

J of Applied Polymer Sci

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In this article, we explore the possibility to develop composites with improved thermal conductivity and electrically insulating properties. The strategy adopted is to combine a thermal and electrical conductive filler (multiwalled carbon nanotubes) with secondary dielectric (but thermally conductive) fillers. To this end, particles with different compositions, sizes, and shape were used as secondary fillers and the composites, prepared by melt compounding, are characterized in terms of thermal and dielectric properties. Results show that, in ternary formulations, an increase of thermal conductivity is always verified for all kind of secondary particles. Analogously, increments in electrical conductivity are observed for ternary compounds containing larger size secondary fillers, while a significant reduction is achieved with the addition of smaller ones. This behavior is explained in terms of mutual distribution of the fillers and is consistent with direct (scanning electron microscopy) and indirect (rheological) observations. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46470.

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The effect of filler functionalization on dispersion and thermal conductivity of polypropylene/multi wall carbon nanotubes composites

Cited by 72 publications

References 40 publications

Thermal conductivity of polymers and polymer nanocomposites

Thermal conductivity of polymers and polymer nanocomposites

Thermal Conductivity of Polypropylene-Based Materials

Thermal conductivity and dielectric properties of polypropylene‐based hybrid compounds containing multiwalled carbon nanotubes

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