Design and Scalable Fabrication of Liquid Metal and Nano‐Sheet Graphene Hybrid Phase Change Materials for Thermal Management

Abstract

Here, a paraffin/liquid metal (LM)/graphene hybrid thermal composite material with a high thermal‐conductivity as well as high latent heat is developed. The paraffin is encapsulated in calcium alginate, which produces leakage‐free phase change material (PCM) capsules. LM is filled among the gaps of PCM capsules to enhance overall heat conduction. Graphene nano‐sheets coating attains efficient heat dissipation because of its high spectral emissivity (>91%) in the spectrum of the mid‐infrared region. The developed material is verified to have strong compatibility and durable stability. The composite is utilized as a thermal buffer (TB) for central processing unit thermal management to demonstrate the synergy of these superior thermal properties. In certain cases, active cooling normally used could be replaced by the developed TB without any energy consumption for thermal management, demonstrating a completely passive cooling strategy. Compared to traditional heat sink active cooling, general energy savings of 10.4–26.3% could thus be achieved by the developed composite in wider operating conditions, proving its potential for more efficient and sustainable data center cooling alongside thermal management of other ground‐based electrical/electronic equipment.

Rapid Thermochromic and Highly Thermally Conductive Nanocomposite Based on Silicone Rubber for Temperature Visualization Thermal Management in Electronic Devices

“…The thermal conductivity of OTM-GO/Al 2 O 3 /PDMS nanocomposites was isotropic; thus, the thermal dissipation model can be further simplified to The OTM-GO/Al 2 O 3 /PDMS nanocomposites were used as thermal interface materials (TIMs) for high-power CPU and LED chips to further evaluate their temperature-indicating function and heat dissipation efficiency. 46,47 The pristine PDMS was measured as the control group. As shown in Figure 5a, the CPU test system consists of circuit boards, chips, and the OTM-GO/Al 2 O 3 /PDMS nanocomposites.…”

High-throughput microfluidic production of carbon capture microcapsules: fundamentals, applications, and perspectives

“…sion droplets. Double emulsion droplets, which consist of three immiscible phases and exhibit diverse inner structures and morphologies, are the cornerstone of fine emulsion production technology [150,151]. This technology shows great [142] with permission from the Royal Society of Chemistry and (d) wedge-shaped step emulsification devices: (i) schematic illustration of wedge-shaped step emulsification device, (ii) optical micrograph of a section, (iii) optical micrograph of a nozzle, (iv) cross-section of a nozzle.…”

Recent Advancements in Applications of Graphene to Attain Next-Level Solar Cells

“…Its thickness-dependent semiconductor properties make it suitable for Schottky junction formation with particular metals [15]. These properties further expand its scope to advanced field-effect transistors [4], liquid crystal devices [16], Li ion battery electrodes [17][18][19][20], ultra-capacitors for low-cost high-yield energy storage [21][22][23][24][25][26][27], catalysts and proton-exchange membranes in fuel cells [28][29][30][31], field electron emitters [32,33], ultra-tough paper [34], organic memory devices [35], resonators [36], gas molecule detection [37], photo-detectors [38] and thermal management [39]. Hence, in a nutshell, it has found wide applications in the fields of photonics, electronics, spintronics, energy storage and conversion, durable flexible thin display screens, biomedical devices and emerging technology of graphene-based smart materials [40][41][42][43][44][45][46][47][48][49].…”