Biomass derived carbon aerogel as an ultrastable skeleton of form-stable phase change materials for efficient thermal energy storage

Abstract

Direct conversion of biomass to carbon aerogel provides a promising approach to developing supporting material for phase change materials (PCMs). In present work, carrot and pumpkin derived carbon aerogels (CCA and PCA) were fabricated via a hydrothermal and post-sintering process. N 2 adsorption-desorption isotherms were used to evaluate the specific surface area and pore distribution of the carbon aerogels. It showed that the carrot carbon aerogel sintered at 800°C (CCA800) possessed a specific surface area of 33.80 m 2 ·g −1 , which is separately 168%, 165%, and 287% higher than that of carrot carbon aerogel sintered at 1000°C (CCA1000, 12.59 m 2 ·g −1 ), pumpkin carbon aerogel sintered at 800°C (PCA800, 12.77 m 2 ·g −1 ), and pumpkin carbon aerogel sintered at 1000°C (PCA1000, 8.74 m 2 ·g −1 ). Owing to its porosity, the carbon aerogels with a high loading content of palmitic acid (PA)/thiol-ene resin (TE) composite as a PCM without leakage. A thermal conductivity enhancement of 60.5% was achieved by 50PA/TE@PCA1000 compared with 50PA/TE, and DSC result showed its latent heat of 88.26 J/g. The excellent properties of PCMs composites lead to a promising application foreground.

3D Lamellar Structure of Biomass-Based Porous Carbon Derived from Towel Gourd toward Phase Change Composites with Thermal Management and Protection

“…The pore dimension of a porous carrier can be as small as a nanometer, so as to effectively prevent the leakage of PCMs. , Combined with its inherent features of large specific surface area and high porosity, the porous supporting carrier has exceptionally high loading capacity for PCMs, and the resultant PCC has high thermal energy conversion efficiency. Several typical porous supporting carriers for the preparation of PCCs have been studied, including metal foam, expanded graphite, carbon nanotube, graphene oxide and graphene aerogel, carbon aerogel, and mesoporous silica . Among the various examined porous substances so far, highly interconnected 3D carbon materials are one of the ideal supporting materials; − in particular, biomass-based carbon materials are favored by many researchers because of their low cost/price, easy availability, and environmental friendliness.…”

A waste hemp‐based biomass carbon aerogel with high fire‐resistance

“…As shown in Figure 3a–c, the cellulose aerogel exhibit a 3D honeycomb configuration. This structure arises from the thermal decomposition of oxygen‐ and hydrogen‐bearing functional groups into gaseous byproducts such as water vapor and carbon monoxide during the high‐temperature carbonization process 31 . This process leads to the development of a porous carbonaceous 3D framework with discernible lamellar sections, indicating the transition to CA.…”

“…As shown in Figure 3a-c from the thermal decomposition of oxygen-and hydrogen-bearing functional groups into gaseous byproducts such as water vapor and carbon monoxide during the high-temperature carbonization process. 31 This process leads to the development of a porous carbonaceous 3D framework with discernible lamellar sections, indicating the transition to CA. An increase in carbonization temperature correlates with augmented lamella size and thickness, which is attributed to the fusion of hydrogen bonds and hydroxyl groups amidst the freeze-drying phase, resulting in a denser fiber interconnection and more pronounced lamellar framework.…”

Green Synthesis of Carbon Aerogel from Rose Apple (Syzygium jambos) for Ciprofloxacin, Diesel Oil, Organic Solvents Adsorption, and Electrochemical Properties

“…Concurrently, under a high heat profile of 800 °C, the sintering process of the carbon structure also commenced. [22] As a result, quasi-spherical morphology adorned the carbon aerogel structure, proposedly from the formation of gaseous products, causing inflation. Regarding RACA-900, the material structure completely collapsed with various cracks and defective sites across the surface.…”