Improving thermal conductivity and decreasing supercooling of paraffin phase change materials by n-octadecylamine-functionalized multi-walled carbon nanotubes

Abstract

N-Octadecylamine-functionalized multi-walled carbon nanotubes (f-MWCNTs) are introduced to paraffin to improve the thermal conductivity and decrease supercooling of phase change materials.

Synthesis and Characterization of Paraffin/Metal Organic Gel Derived Porous Carbon/Boron Nitride Composite Phase Change Materials for Thermal Energy Storage

“…Consequently, introducing PCM into high thermal conductive matrixes including metal oxides, graphene aerogel, carbon nanotube (CNT), expanded vermiculite, metal nanoparticles graphite foam, EG have been reported to improve the thermal conductivity of composite PCMs. For example, with increased functionalized multi‐walled carbon nanotubes content, the thermal conductivity of paraffin/f‐MWCNTs composite PCMs showed significant improvement up to 0.53 W/mK without leakage . Likewise, Xu and Li found improved thermal conductivity up to 42.45 % with the addition of MWCNT to paraffin/diatomite composite PCMs.…”

Engineering the Thermal Conductivity of Functional Phase‐Change Materials for Heat Energy Conversion, Storage, and Utilization

“…Tang et al modified multiwalled CNTs with n-octadecylamine to improve their dispersion in the PCM matrix, which to some extent, further enhanced the thermal conductivity and heat transfer in composites. [40] In addition, the activated carbon and diatomaceous earth with its rich pore structure has been used to adsorb various PCMs and lauric acid to enhance the thermal conductivity. [41] Metal and Metal Oxide Additives: We summarized the partial literature on thermal conductivity tuning using metallic materials in Table 1, including metal foams, metal nanoparticles, and metal oxide nanoparticles.…”

The effect of 3D carbon nanoadditives on lithium hydroxide monohydrate based composite materials for highly efficient low temperature thermochemical heat storage

“…As an important part of clean and efficient utilization of alternative energy, the development of thermal energy storage technology has become increasingly important in recent years owing to the incremental consumption of fossil energy and the emission of greenhouse gases. 1,2 These technologies are divided into three main types: sensible heat storage, 3,4 latent heat storage, 5,6 and thermochemical heat storage. 7,8 All of these technologies participate in solving the supply and demand mismatch of thermal energy, and improve energy efficiency.…”

“…However, under normal conditions, traditional one-dimensional or two-dimensional carbon nanomaterials are selected and used for latent heat thermal energy storage. 2,28,29 3D carbon nanomaterials are rarely used for thermal energy storage, 30 especially thermochemical heat storage. In our previous work, 1D carbon nanomaterials, 31 MWCNTs were used to modify LiOH$H 2 O; heat storage performance was markedly enhanced, but the thermal conductivity needed improvement.…”