Diverse Applications of Graphene-Based Polymer Nanocomposites

Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials ◽

10.4018/978-1-7998-8591-7.ch040 ◽

2021 ◽

pp. 973-1001

Author(s):

Pradip Majumdar ◽

Amartya Chakrabarti

Keyword(s):

Polymer Nanocomposites ◽

High Heat ◽

Nanocomposite Materials ◽

High Heat Flux ◽

Current State ◽

Energy Sensor ◽

Manufacturing Techniques ◽

Suitable Area ◽

Nanosized Filler ◽

Enhanced Thermal Conductivity

Polymer nanocomposites are unique materials reinforced with nanoscale additives. Among a variety of nanomaterials available to act as filler additives in different polymer matrices, graphene is the most versatile one. Graphene-based polymer nanocomposites have improved electrical, mechanical, chemical, and thermal properties, which make them suitable for applications in the electronics, energy, sensor, and space sectors. Graphene, the nanosized filler, can be prepared using either a top-down or a bottom-up approach and dispersed in the polymer matrix utilizing different conventional techniques. The nanocomposite materials find usage in suitable area of applications depending on their specific characteristics. This chapter discusses the current state-of-the-art manufacturing techniques for graphene and graphene-based nanocomposite materials. Application of graphene-based polymer nanocomposites in the various fields with an emphasis on the areas high heat flux applications requiring enhanced thermal conductivity will be an additional major focus of this chapter.

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Diverse Applications of Graphene-Based Polymer Nanocomposites

Diverse Applications of Organic-Inorganic Nanocomposites - Advances in Mechatronics and Mechanical Engineering ◽

10.4018/978-1-7998-1530-3.ch003 ◽

2020 ◽

pp. 47-82 ◽

Cited By ~ 1

Author(s):

Pradip Majumdar ◽

Amartya Chakrabarti

Keyword(s):

Polymer Nanocomposites ◽

High Heat ◽

Nanocomposite Materials ◽

High Heat Flux ◽

Current State ◽

Energy Sensor ◽

Manufacturing Techniques ◽

Suitable Area ◽

Nanosized Filler ◽

Enhanced Thermal Conductivity

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Fundamental Issues and Technical Problems About Pulsating Heat Pipes

Journal of Heat Transfer ◽

10.1115/1.4051465 ◽

2021 ◽

Author(s):

Wookyoung Kim ◽

Sung Jin Kim

Keyword(s):

Review Paper ◽

Heat Pipes ◽

High Heat ◽

High Heat Flux ◽

Controversial Issues ◽

Technical Problems ◽

Practical Applications ◽

Current State ◽

Second Category ◽

Shed Light

Abstract Since the introduction of Pulsating Heat Pipes (PHPs) in early 1990s, PHPs have received a lot of attention due to their obvious advantages such as the geometrical simplicity, and the potential for high-heat flux applications even without power consumption. Although numerous investigators have studied PHPs over the last three decades, there still exist a few controversial issues on fundamental characteristics and several technical problems in practical applications. To put finishing touches to the controversial issues and to shed light on technical problems, recent advances in PHPs are critically reviewed in this paper. The results of the critical review are classified into two categories: (i) fundamental aspects of PHPs and (ii) practical aspects of PHPs. First category focuses on reviewing the current state of the art on the fundamental characteristics of PHPs. Second category summarizes the technical problems which are resolved for utilizing PHPs in practical applications. This review paper would help researchers or engineers who are working on or utilizing PHPs.

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Perspective: Issues in CHF Modeling—The Need for New Experiments

Journal of Heat Transfer ◽

10.1115/1.2822614 ◽

1995 ◽

Vol 117 (3) ◽

pp. 558-567 ◽

Cited By ~ 35

Author(s):

P. Sadasivan ◽

C. Unal ◽

R. Nelson

Keyword(s):

Heat Flux ◽

Nucleate Boiling ◽

High Heat ◽

High Heat Flux ◽

Mechanistic Models ◽

System Parameters ◽

Current State ◽

Orientation Effects ◽

Independent Entity ◽

Flow Effects

Nucleate boiling and critical-heat-flux (CHF) phenomena have been studied extensively for several decades. However, a satisfactory mechanistic description remains elusive. Although the influences of some system parameters such as heater geometry, body forces, etc., have been elucidated, the influences of several others remain in dispute. In this paper, we present our perspective on the current state of CHF modeling. We list possible parameters that are relevant in the process and discuss the interactions among these parameters. The consequences of such interactions are also discussed. We focus on the simplest configuration—saturated pool boiling on flat heaters. Additional complexities such as orientation effects, flow effects, enhanced surfaces, etc., are not addressed. We highlight specific areas on which we believe experimental efforts should focus to obtain improved mechanistic models of CHF. Experimental techniques used in previous studies are evaluated, and recommendations for new or modified techniques are discussed. We believe CHF must be looked at in the boiling plane (q and ΔT) rather than merely as a single heat-flux point. Mechanistically, this leads us to view CHF as the limiting point of the nucleate boiling region rather than as an independent entity. Experimentally, this means that issues related to the high-heat-flux region must be studied and their effects on CHF investigated.

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