Short-Chain Modified SiO2 with High Absorption of Organic PCM for Thermal Protection

Wang, Fuxian; Gao, Shiyuan; Pan, Jiachuan; Li, Xiaomei; Liu, Jian

doi:10.3390/nano9040657

Cited by 9 publications

(4 citation statements)

References 57 publications

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“…In another study, Shaid et al 177 prepared eicosane@silica aerogel microparticles by dispersing silica aerogels in liquid eicosane via melt-infiltration, solvent dissolution and combined melt dissolution, which can serve as thermal protective textile coating additives over a wide temperature range. Based on surface modification techniques, Wang et al 178 employed short chain alkyl-modified SiO 2 (M-SiO 2 ) aerogels to encapsulate technical grade paraffin (RT). The adsorption rate of RT in SiO 2 aerogels was increased by 38%, and the obtained RT@M-SiO 2 aerogel exhibited a high latent heat of 180 J/g and a lower thermal conductivity of 0.17 W/m•K compared to that of RT.…”

Section: Silica Aerogel-based Pcmsmentioning

confidence: 99%

Aerogels Meet Phase Change Materials: Fundamentals, Advances, and Beyond

et al. 2022

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Benefiting from the inherent properties of ultralight weight, ultrahigh porosity, ultrahigh specific surface area, adjustable thermal/electrical conductivities, and mechanical flexibility, aerogels are considered ideal supporting alternatives to efficiently encapsulate phase change materials (PCMs) and rationalize phase transformation behaviors. The marriage of versatile aerogels and PCMs is a milestone in pioneering advanced multifunctional composite PCMs. Emerging aerogel-based composite PCMs with high energy storage density are accepted as a cutting-edge thermal energy storage (TES) concept, enabling advanced functionality of PCMs. Considering the lack of a timely and comprehensive review on aerogel-based composite PCMs, herein, we systematically retrospect the state-of-the-art advances of versatile aerogels for high-performance and multifunctional composite PCMs, with particular emphasis on advanced multiple functions, such as acoustic−thermal and solar−thermal−electricity energy conversion strategies, mechanical flexibility, flame retardancy, shape memory, intelligent grippers, and thermal infrared stealth. Emphasis is also given to the versatile roles of different aerogels in composite PCMs and the relationships between their architectures and thermophysical properties. This review also showcases the discovery of an interdisciplinary research field combining aerogels and 3D printing technology, which will contribute to pioneering cutting-edge PCMs. This review aims to arouse wider research interests among interdisciplinary fields and provide insightful guidance for the rational design of advanced multifunctional aerogel-based composite PCMs, thus facilitating the significant breakthroughs in both fundamental research and commercial applications.

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Section: Silica Aerogel-based Pcmsmentioning

confidence: 99%

Aerogels Meet Phase Change Materials: Fundamentals, Advances, and Beyond

et al. 2022

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“…In the A.C. (IV) diffractogram, for example, no phase other than quartz was detected, indicating that the unit cell of the crystal lattice of this material was composed basically of the elements silicon and oxygen in a hexagonal arrangement. This change most likely came from the chemical activation with phosphoric acid and heat treatment that this material was subjected to; in fact, the intention of activating an adsorbent is to change its structure to provide the formation of a porous surface with high adsorbent capacity; the fact that the base material was rich in silicon allowed all materials to show peaks related to the silicon oxide phases, a material that is highly known in the literature for being a material with a rich porous structure and high adsorptive capacity [26,44,63].…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

et al. 2022

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Nanostructured crystalline composite (activated carbon) was synthesized from residual ashes of the burning process of the sludge generated in the flotation step of a poultry slaughterhouse and was used for Allura red dye adsorption. The ashes were chemically activated using two types of reagents, H 2 O 2 and H 3 PO 4 , and the structure, morphology, and surface of the adsorbents were characterized by different techniques such as scanning electron microscopy with energy dispersive spectroscopy (SEM/ EDS), N 2 adsorption/desorption isotherms with Brunauer-Emmett-Teller (BET) method and Barret-Joyner-Hallenda (BJH) method, Fourier transform infrared spectroscopy (MID/FTIR), X-ray diffraction (XRD), and the point of zero charge (PZC). The adsorbent synthesized with H 3 PO 4 at 400 ºC displayed the best performance in removing dye molecules in 10 mg.L -1 solution, with a removal rate of approximately 100% when using a concentration of 2 g.L -1 in particle size of 0.42 mm. Besides that, the adsorbent synthesized with H 3 PO 4 had a particle diameter of approximately 15 Å, a size corresponding to the nanometer range, presented a crystallinity structure with well-defined phases such as quartz and the major elements in the composition were carbon and silicon. The surface area of the ashes enlarged from 14.71 to 448.1 m 2 .g -1 when H 3 PO 4 was used as an activator, producing a high-quality adsorbent, with an excellent cost-benefit, being it possible to be produced for a price of 9.35 USD.kg -1 , a price lower than the commercial activated carbon, making it a promising candidate for application in an industrial environment.

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“…Interestingly, a value of 168% pore filling was obtained for dual methyl and hydroxyl functionalization, at a paraffin loading of 88% wt., indicating adsorption in interparticle spaces [ 105 ]. A comparative study of hydrophilic or methyl-functionalized aerogel melt impregnated with paraffin RT60 was also carried out [ 106 ]. The methyl-functionalized aerogel yielded composites containing 80% wt.…”

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

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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.

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Short-Chain Modified SiO2 with High Absorption of Organic PCM for Thermal Protection

Cited by 9 publications

References 57 publications

Aerogels Meet Phase Change Materials: Fundamentals, Advances, and Beyond

Aerogels Meet Phase Change Materials: Fundamentals, Advances, and Beyond

Production of nanostructured crystalline composite using residual ashes from flocculated sludge burning process in a poultry slaughterhouse wastewater treatment system

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

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