Fabrication of high thermal conductive shape-stabilized polyethylene glycol/silica phase change composite by two-step sol gel method

Weng, Zengsheng; Wu, Kun; Luo, Fubin; Xiao, Fei; Zhang, Qian; Wang, Shan; Lu, Mangeng

doi:10.1016/j.compositesa.2018.04.016

Cited by 18 publications

(6 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The CF also improved the absorbance of light and its conversion to heat and the thermal conductivities of the composites, proportionally to the CF content. Ca, Mg, and Al metal chloride were used as coagulant in the sol-gel process of obtaining PEG/silica composites, in order to increase the thermal conductivity of the composites without the addition of fillers [ 157 ]. The thermal conductivity of the samples increases with the molar weight of PEG and with the addition of metal ions in the synthesis.…”

Section: Phase Change Materials Containing Porous Silica Matrices mentioning

confidence: 99%

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

et al. 2021

View full text Add to dashboard Cite

Phase change materials (PCMs) can store thermal energy as latent heat through phase transitions. PCMs using the solid-liquid phase transition offer high 100–300 J g−1 enthalpy at constant temperature. However, pure compounds suffer from leakage, incongruent melting and crystallization, phase separation, and supercooling, which limit their heat storage capacity and reliability during multiple heating-cooling cycles. An appropriate approach to mitigating these drawbacks is the construction of composites as shape-stabilized phase change materials which retain their macroscopic solid shape even at temperatures above the melting point of the active heat storage compound. Shape-stabilized materials can be obtained by PCMs impregnation into porous matrices. Porous silica nanomaterials are promising matrices due to their high porosity and adsorption capacity, chemical and thermal stability and possibility of changing their structure through chemical synthesis. This review offers a first in-depth look at the various methods for obtaining composite PCMs using porous silica nanomaterials, their properties, and applications. The synthesis and properties of porous silica composites are presented based on the main classes of compounds which can act as heat storage materials (paraffins, fatty acids, polymers, small organic molecules, hydrated salts, molten salts and metals). The physico-chemical phenomena arising from the nanoconfinement of phase change materials into the silica pores are discussed from both theoretical and practical standpoints. The lessons learned so far in designing efficient composite PCMs using porous silica matrices are presented, as well as the future perspectives on improving the heat storage materials.

show abstract

Section: Phase Change Materials Containing Porous Silica Matrices mentioning

confidence: 99%

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[19][20][21] thermally conductive polymers, respectively. Strategy i) is relatively complicated and time-consuming, [46,47] whereas strategy ii) is considered as a more efficient and convenient approach. [48,49] Owing to the advantages of easy processing, low cost, and easy to industrialize, thermally conductive polymer composites have been widely used in industrial fields, including energy, electronic packaging, electrical equipment, and aerospace.…”

Section: Introductionmentioning

confidence: 99%

“…Strategies i) and ii) are called the intrinsic thermally conductive polymers and filled thermally conductive polymers, respectively. Strategy i) is relatively complicated and time‐consuming, [ 46,47 ] whereas strategy ii) is considered as a more efficient and convenient approach. [ 48,49 ]…”

Section: Introductionmentioning

confidence: 99%

A Roadmap Review of Thermally Conductive Polymer Composites: Critical Factors, Progress, and Prospects

Wang

Weng

et al. 2023

Adv Funct Materials

View full text Add to dashboard Cite

Recently, the need for miniaturization and high integration have steered a strong technical wave in developing (micro‐)electronic devices. However, excessive amounts of heat may be generated during operation/charging, severely affecting device performance and leading to life/property loss. Benefiting from their low density, easy processing and low manufacturing cost, thermally conductive polymer composites have become a research hotspot to mitigate the disadvantage of excessive heat, with potential applications in 5G communication, electronic packaging and energy transmission. By far, the reported thermal conductivity coefficient (λ) of thermally conductive polymer composite is far from expectation. Deeper understanding of heat transfer mechanism is desired for developing next generation thermally conductive composites. This review holistically scopes current advances in this field, while giving special attention to critical factors that affect thermal conductivity in polymer composites as well as the thermal conduction mechanisms on how to enhance the λ value. This review covers critical factors such as interfacial thermal resistance, chain structure of polymer, intrinsic λ value of different thermally conductive fillers, orientation/configuration of nanoparticles, 3D interconnected networks, processing technology, etc. The applications of thermally conductive polymer composites in electronic devices are summarized. The existing problems are also discussed, new challenges and opportunities are prospected.

show abstract

“…For example, Weng et al reported that inorganicorganic polyethylene glycol (PEG)/silica (SiO2) nanocomposites with a low TC of 0.41 W/mK were prepared by sol-gel method. [42] Yu et al prepared a 3D SiC-nanowire network by ice-templating method, while the 3D SiCnanowire/epoxy composites were fabricated by vacuumassisted impregnation of epoxy, which had a relatively low TC of 1.67 W/mK. [43] The TC enhancement of polymer composites after applied aforementioned approaches is often much lower than the predicted amount.…”

Section: Introductionmentioning

confidence: 99%

The Contribution of Conductive Network Conversion in Thermal Conductivity Enhancement of Polymer Composite: A Theoretical and Experimental Study

Sun¹,

Zhang²,

Du³

et al. 2021

ES Mater. Manuf.

View full text Add to dashboard Cite

In view of thermal conductive network (TCN) conversion from high thermal dissipation to low thermal dissipation, a new theory of thermal conductivity (TC) enhancement was proposed in this paper. The TC enhancement effect was greatly limited due to the formation of an uncompacted self-assembly network in the composites prepared by traditional compounding methods. In order to achieve the goal of TCN conversion from high thermal dissipation to low thermal dissipation, we combined the TCN densification through space confining forced network assembly (SCFNA) with adding rigid particles. A composite system of polydimethylsiloxane/short carbon fiber/glass bubble (PDMS/SCF/GB) was selected as the modelling object and used to perform verification experiments. On the basis of Nan model, the TCN conversion mathematical model of TC prediction was established. The effects of volume fraction, thermal boundary resistance, thermal contact resistance, aspect ratio and distribution state of fillers on the effective thermal conductivity (ETC) of this PDMS composite were all systematically studied and discussed. In order to verify the accuracy of the model established to predict the TC of PDMS/SCF/GB composite during TCN conversion, a series of experiments were carried out to compare with the model results.

show abstract

Fabrication of high thermal conductive shape-stabilized polyethylene glycol/silica phase change composite by two-step sol gel method

Cited by 18 publications

References 45 publications

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

A Roadmap Review of Thermally Conductive Polymer Composites: Critical Factors, Progress, and Prospects

The Contribution of Conductive Network Conversion in Thermal Conductivity Enhancement of Polymer Composite: A Theoretical and Experimental Study

Contact Info

Product

Resources

About