Atmospheric drying preparation and microstructure characterization of fly ash aerogel thermal insulation material with superhydrophobic

Li, Yong; Zang, Chuyue; Zhang, Shu; Zhang, Yunsheng; Yuan, Zhengcheng; Li, Huajian; Jiang, Jinyang

doi:10.1016/j.conbuildmat.2021.124425

Cited by 11 publications

(6 citation statements)

References 44 publications

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“…In order to effectively solve the problem of heat dissipation of permanent magnet synchronous motor, relevant researchers are required to simulate and analyze the heat dissipation of permanent magnet synchronous motor, carry out reasonable optimization according to the simulation analysis results, and carry out scientific and reasonable design for all aspects, thereby, the heat dissipation of the permanent magnet synchronous motor can achieve satisfactory results, and on this basis, the effective operation of the permanent magnet synchronous motor can be realized. We cause the motor temperature to rise further and form a vicious circle, which will seriously affect the life of the motor and the safety of the motor operation; an efficient cooling system is an important basis for restraining motor temperature rise, improving motor operation stability, and prolonging motor life [6].…”

Section: Literature Reviewmentioning

confidence: 99%

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Lin

Xie

2022

Journal of Chemistry

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In order to solve the problem of heat dissipation of permanent magnet synchronous motors, a technology using the principle of nanofluid electrochemistry is proposed. The main content of this technology is based on the characteristics and applications of nanofluids; according to the experimental system, the preparation and experimental parameters of nanofluids were determined; finally, by studying the influence of ultrasonic oscillation time and dispersant on the stability of nanofluids, it was concluded that the improvement of the thermal conductivity of nanofluids contributed to the improvement of the heat transfer rate of nanofluids. Experimental results show that when the volume fraction is 0.5, the increase rate of thermal conductivity is 1.51, the increase rate of convective heat transfer coefficient is 20.33, and the increase rate of convective heat transfer coefficient is greater than that of thermal conductivity, which shows that nanofluids have very good heat dissipation ability. It is proved that the technical research of nanofluid can meet the heat dissipation requirements of a permanent magnet synchronous motor.

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Section: Literature Reviewmentioning

confidence: 99%

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Lin

Xie

2022

Journal of Chemistry

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“…Drying gels under atmospheric pressure gives the materials called “xerogels”, which are usually considered less porous materials than aerogels. However, for SiO 2 , atmospheric drying of some specific gels can still produce aerogels with considerable porosity. − A feasible way is the surface modification of the gel to hydrophobic, and the pore collapse during the ambient drying can be minimized. So far, there are few papers on preparing pristine metal oxide aerogels by such a method.…”

Section: Synthesis Of Metal Oxide Aerogelsmentioning

confidence: 99%

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

Zhi

Tang

et al. 2022

Energy Fuels

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Metal oxide aerogels have emerged as a new class of photocatalysts. As a type of 3-dimensional (3D) porous structure, an aerogel owns the characteristics of high specific surface area, tunable pore size, and large pore volume, which can distinguish itself from conventional powder or film counterparts. Such merits allow aerogels to expose more active catalytic sites and support other active cocatalysts. Metal oxide aerogels in a monolithic form also overcome the recycling and separation issues that hinder the application of free-standing powder photocatalysts. This article reviews the typical synthesis methodologies of metal oxide aerogels, including alkoxide hydrolysis and condensation, epoxide assistant, and self-assembly. It also discusses the interfacial charge and mass transfer processes in metal oxide aerogels and correlations among the composition, microstructure, and photocatalytic activity. In addition, this article gives a summary of photocatalytic applications of aerogels in water purification and sterilization, solar water splitting, and gas-phase reactions such as CO 2 reduction and CO oxidation. It also discusses the strategies for enhancing the performance of aerogel photocatalysts. In particular, this paper highlights the recent development of plasmonic aerogel photocatalysts.

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“…Currently, the preparation methods for silica aerogel typically involve the sol-gel method, aging method, solvent replacement method, and drying process [25][26][27][28]. However, the use of expensive organic alkoxides as silicon sources and the high cost, danger, and complexity associated with the supercritical drying method limit its large-scale industrial application [17,[29][30][31][32]. Therefore, it is significant to explore low-cost, efficient, and environmentally friendly silicon sources and safe, cost-effective drying methods for the preparation of silica aerogel.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Surface Strengthening Modification of Silica Aerogel from Fly Ash

Zhang,

Wang,

Zhao

et al. 2024

Materials

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This study focuses on using activated fly ash to preparate silica aerogel by the acid solution–alkali leaching method and ambient pressure drying. Additionally, to improve the performance of silica aerogel, C6H16O3Si (KH-570) and CH3Si(CH3O)3 (MTMS) modifiers were used. Finally, this paper investigated the factors affecting the desilication rate of fly ash and analyzed the structure and performance of silica aerogel. The experimental results show that: (1) The factors affecting the desilication rate are ranked as follows: hydrochloric acid concentration > solid–liquid ratio > reaction temperature > reaction time. (2) KH-570 showed the best performance, and when the volume ratio of the silica solution to it was 10:1, the density of silica aerogel reached a minimum of 183 mg/cm3. (3) The optimal process conditions are a hydrochloric acid concentration of 20 wt%, a solid–liquid ratio of 1:4, a reaction time of two hours, and a reaction temperature of 100 °C. (4) The optimal performance parameters of silica aerogel were the thermal conductivity, specific surface area, pore volume, average pore size, and contact angle values, with 0.0421 W·(m·K)−1, 487.9 m2·g−1, 1.107 cm3·g−1, 9.075 nm, and 123°, respectively. This study not only achieves the high-value utilization of fly ash, but also facilitates the effective recovery and utilization of industrial waste.

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Atmospheric drying preparation and microstructure characterization of fly ash aerogel thermal insulation material with superhydrophobic

Cited by 11 publications

References 44 publications

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Application of Nanofluid Electrochemistry in Heat Dissipation of Permanent Magnet Synchronous Motors

Synthesis and Photocatalysis of Metal Oxide Aerogels: A Review

Synthesis and Surface Strengthening Modification of Silica Aerogel from Fly Ash

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