Silver microsphere doping porous-carbon inspired shape-stable phase change material with excellent thermal properties: preparation, optimization, and mechanism

Abstract

In this study, silver microspheres (SMS) were introduced into cotton stalk porous-carbon (CSP) to prepare silver microsphere doping porous-carbon (SMS-CSP), and then SMS-CSP was used as the matrix of polyethylene glycol (PEG) to synthesize shape-stable phase change material of PEG/SMS-CSP. It was found that the introduction of SMS into CSP could not only greatly improve the loading capacity of the porous-carbon for PEG, but also could increase the thermal conductivity of PEG/SMS-CSP. Additionally, the method of introducing SMS into porous-carbon had the advantages of environmental protection and simple operation. Moreover, the raw material of cotton stalk is a kind of agricultural waste, which has the merits of wide source, low price and easy to obtain. Furthermore, in the preparation of cotton stalk porous-carbon, with the increase of pyrolysis temperature the thermal conductivity of PEG/SMS-CSP could be enhanced significantly. The mechanism about the enhancement of thermal conductivity was clarified, which could provide more basic theory for the study about the thermal conductivity of shape-stable phase change materials (ss-PCMs) based on porous-carbon.

Advances in Biocarbon and Soft Material Assembly for Enthalpy Storage: Fundamentals, Mechanisms, and Multimodal Applications

“…[104] Copyright 2022, Elsevier); g) silver microsphere doping porous-carbon synthesis (adapted with permission. [111] Copyright 2020, Springer Nature). chemical activator in dehydrating, blowing, and cross-linking; it helps generate unique interpenetrating hierarchical porous structures (HPCs) (Figure 8c).…”

“…The obtained composite revealed enhanced fusion enthalpy and durability over 100 cycles. [111] In addition, Guo et al [114] prepared 3D porous copper with wood using Cu(NH 3 ) 4 2+ as the Cu source for paraffin support. The woody cell wall and interstices directed Cu in the framework and inherited the anisotropic wood structure and demonstrated high oriented thermal conductivity (6.7 W m −1 K −1 along vertical direction) with a heating enthalpy of 116.1 kJ kg −1 .…”

“…[ 104 ] Copyright 2022, Elsevier); g) silver microsphere doping porous‐carbon synthesis (adapted with permission. [ 111 ] Copyright 2020, Springer Nature).…”

“…Copyright 2022, Elsevier; f) enthalpy storage; Inset shows the DSC curves of biochar hybrid (FWP) system (adapted with permission [104]. Copyright 2022, Elsevier); g) silver microsphere doping porous-carbon synthesis (adapted with permission [111]. Copyright 2020, Springer Nature).…”

Strong breathable membrane with excellent self‐cleaning, wave‐transparent, and heat dissipation performances

“…For instance, that film composed of polydopamine, graphene, and carbon tube was prepared by chemical reduction and carbonization process, in which those fillers are connected to each other to improve heat transfer performance, resulting in its in‐plane thermal conductivity reaches 1597 W·(m·K) −1 14 . Furthermore, the carbonized natural plant, that is, cotton stalk, is compounded with polyethylene glycol via a solution method, and the thermal conductivity is 0.7 W·(m·K) −1 15 . These mentioned composites display high thermal conductivity, which is conducive to the rapid transfer and dissipation of heat.…”