High Thermal Conductivity and Mechanical Strength Phase Change Composite with Double Supporting Skeletons for Industrial Waste Heat Recovery

Abstract

The “solid–liquid” leakage and low thermal conductivity of organic phase change materials limit their wide range of applications. In this paper, a novel carbon fiber/boron nitride (CF/BN)-based nested structure was constructed, and then, a series of poly­(ethylene glycol) (PEG)-based phase change composites (PCCs) with high thermal conductivity and mechanical strength were prepared via the simple vacuum adsorption technology by employing the CF/BN nested structure as the heat conduction path and supporting material and the in situ obtained cross-linking epoxy resin as another supporting material. The thermal conductivity of the obtained PCC is as high as 0.81 W/m K, which is 7.4 times higher than that sample without the CF/BN nested structure. The support of the double skeletons confers the obtained PCCs with excellent mechanical strength. Surprisingly, there is not any deformation for PCCs under the pressure of 128.5 times its own weight during the phase change process. In addition, the phase change enthalpy of the obtained PCC is as high as 107.9 J/g. All the results indicate that the obtained PEG-based PCCs possess huge application potential in the field of industrial waste heat recovery.

3D graphene/silver nanowire aerogel encapsulated phase change material with significantly enhanced thermal conductivity and excellent solar-thermal energy conversion capacity

“…5b. [45][46][47][48][49][50][51][52][53][54][55][56][57][58] Therefore, it is easy to infer that the higher the thermal conductivity of the CPCMs, the faster their thermal energy charging/discharging rates in thermal energy utilization.…”

Fullerene Reinforced Polymeric Nanocomposites for Energy Storage—Status and Prognoses

“…Moreover, the future research may focus the use of phase change material in these energy storage materials (Yin et al, 2021). Especially the use of ecofriendly or bio-based materials may yield high performance fullerene based energy storage devices (Gong et al, 2021;Yin et al, 2022).…”

Multifunctional Phase Change Composites Based on Elastic MXene/Silver Nanowire Sponges for Excellent Thermal/Solar/Electric Energy Storage, Shape Memory, and Adjustable Electromagnetic Interference Shielding Functions

“…However, some shortcomings of PCMs prohibit their practical applications, which are summarized as follows: (1) Easy leakage above the melting point of PCMs, (2) low thermal conductivity, which decreases the heat storage speed, , (3) lack of light/electric-responsive capacities, , and (4) strong rigidity that restricts the PCMs to be installed into confined devices or form close contact with objects. , To solve the liquid leakage, low thermal conductivity, and poor light/electric-responsive properties, various photothermal conversion nanofillers were incorporated into PCMs. Recently, MXene has attracted extensive attention of researchers due to its remarkable photoabsorption, electrical, and electromagnetic shielding properties .…”