Synthesis of hollow TiO2@SiO2 spheres via a recycling template method for solar heat protection coating

Li, Li; Chen, Xinhong; Xiong, Xia; Wu, Xiaoping; Xie, Zongyi; Liu, Zuohua

doi:10.1016/j.ceramint.2020.09.117

Cited by 27 publications

(12 citation statements)

References 45 publications

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“…Similarly, TiO 2 @SiO 2 in a polyurethane matrix-based composite has been shown to produce a transparent coating with excellent thermal insulation and UV-shielding properties . A hollow SiO 2 and indium tin oxide nanoparticle composite with poly(ether sulfone) also shows promise, with low thermal conductivity and high near-infrared shielding, as well as high visible transparency . Epoxy resin dispersion containing tungsten-doped vanadium dioxide nanoparticles effectively reduces indoor temperature, while VO 2 -polymer composite materials exhibit temperature-responsive color variation and enhanced IR modulation .…”

Section: Introductionmentioning

confidence: 99%

“…20 A hollow SiO 2 and indium tin oxide nanoparticle composite with poly(ether sulfone) also shows promise, with low thermal conductivity and high near-infrared shielding, as well as high visible transparency. 21 Epoxy resin dispersion containing tungsten-doped vanadium dioxide nanoparticles effectively reduces indoor temperature, while VO 2 -polymer composite materials exhibit temperature-responsive color variation and enhanced IR modulation. 22 A Cs x WO 3 −ZnO−SiO 2 composite effectively shields most ultraviolet light and inhibits photochromism.…”

Section: Introductionmentioning

confidence: 99%

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Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Arshad,

Roy,

Mallick

et al. 2023

Ind. Eng. Chem. Res.

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Balancing thermal and visual comfort in buildings necessitates effective insulation to counteract heat loss and gain, especially with temperature variances. One promising approach is to combine phase change materials, such as poly(ethylene glycol) (PEG), with high-performance insulators like silica aerogel (Siag). To bolster opto-thermal performance in building envelopes, we introduce a smart insulation composite material through PEG integration, i.e., PEGalyation with Siag. Central to this thermal behavior is the PEG’s phase change properties, which foster a shape-stabilized framework with Siag through their porous confinement. Preliminary observations indicate notable capabilities of obstructing near-infrared light while preserving satisfactory visible transparency. An optimized Siag@PEG composite with 5% loading of PEG has the visible range transmission of ∼92%, a decrease of ∼72% in thermal conductivity which is lower than pure glass and PEG, leading to a temperature dependent switchable hydrophobic to hydrophilic wettability characteristics. As a prototype window, the thermal performance evaluation of the synthesized composite, through experimental and computational studies, shows a decrease in indoor temperature of ∼20% with a higher temperature difference of ∼20 °C between outdoor and indoor weather conditions. This lightweight composite can act as sponge media to fill inside the double-paned window and for retrofitting existing glazing to boost the energy efficiency of buildings with facile manufacturing and scalability.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Arshad,

Roy,

Mallick

et al. 2023

Ind. Eng. Chem. Res.

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“…24 Also, it can be used as a substrate or coating material for optical devices with good transparency and low dielectric constant, 25,26 which helps to improve the optical performance and stability of the devices, thus attracting much attention of scholars. 27 There are various methods for the preparation of hollow mesoporous SiO 2 , [28][29][30][31] and the hard template method and soft template method are the commonly used preparation methods. 32 The soft template method is a method which uses soft templates to form mesoporous structures under sol-gel or hydrothermal conditions.…”

Section: Introductionmentioning

confidence: 99%

“…There are various methods for the preparation of hollow mesoporous SiO 2 , 28–31 and the hard template method and soft template method are the commonly used preparation methods 32 . The soft template method is a method which uses soft templates to form mesoporous structures under sol‐gel or hydrothermal conditions.…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of mesoporous SiO₂/polyimide composite films

Cui,

Zheng,

Wang

et al. 2023

Polymer Composites

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Although polyimide films have a low dielectric constant, with the advent of the 5G era, the dielectric properties of the material are required to be further improved. Therein, we prepared controlled hollow mesoporous SiO2 nanomicrospheres by the hard template method to make mesoporous low dielectric polyimide films. The composite membrane exhibits better thermal stability, mechanical properties, and hydrophobicity compared to the pure membrane. Hollow mesoporous SiO2 dispersed in polyimide can reduce the inhomogeneity of charge distribution between molecules and reduce the interaction between polar chemical bonds and aromatic rings, thus improving the dielectric properties of the whole film. The minimum dielectric constant of the composite films was 2.80 when the hollow mesoporous SiO2 was added at 1.0%. These results fully indicate that the addition of hollow mesoporous SiO2 is beneficial to the multifaceted performance of the polyimide films.Highlights Preparation of hollow mesoporous SiO2 microspheres by using different polystyrene microsphere solutions and TEOS ratios. Synthesis of composite films with different contents of hollow mesoporous SiO2 as functional fillers. The effect of hollow mesoporous SiO2 content on the mechanical properties and thermal stability of PI composite films was investigated. Addition of hollow mesoporous SiO2 reduces the dielectric constant of polyimide composite films.

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“…E então, decidiu-se por realizar síntese semelhante àquela utilizada para obtenção de sílica, alterando o precursor para um comumente utilizado na literatura em sínteses de titânia, caso do TBOT (butóxido (IV) de titânio) (ANANDHI et al, 2016;LI et al, 2021;WANG et al, 2015WANG et al, , 2016.…”

Section: Síntese Dos Nanocontainers De Titâniaunclassified

Síntese e caracterização de nanocontainers mesoporosos de SiO2, TiO2 e ZrO2, e encapsulamento de inibidor de corrosão neles para uso em revestimentos com poder de autorreparação.

Silva¹

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Agradeço à minha orientadora, Prof.ª Idalina Vieira Aoki, pela dedicação e orientação no trabalho. Obrigada por todos os conselhos, sugestões e aprendizados ao longo desses anos no LEC. Foi um período de muito aprendizado e amadurecimento profissional.Aos meus pais, Fernando e Regina, por todo o apoio e suporte que me deram em todas as etapas da minha vida. Aos meus irmãos, Luis Filipe, Bárbara e Mateus, pelos momentos e por poder contar com vocês quando eu precisasse.Ao Rodrigo, por todo amor, carinho, compreensão e parceira ao longo desses anos.Aos meus amigos do LEC, Tiago Ferrer, Paulo, Fernando Melges, Daniel, Mariel, André, Wagner, que sempre foram fonte de suporte e apoio nos dias alegres e tristes.Á Suelen Gomes, que foi uma grande companheira para mim, de laboratório e de São Paulo, por todos ensinamentos, desabafos e ombro amigo.Ao Jivago Santana, por ter sido meu braço direito durante esses anos, que foi parceiro nos momentos ruins e bons, e que estava sempre disposto a ajudar nas situações de desespero.Aos amigos da USP/Butantã, Thamiris, Jonathan, Thássia, Andreia, pelos momentos de apoio.À técnica Tereza, pelo zelo e cuidado que sempre lhe foram característicos. Obrigada pelos papos nos cafés e pela doçura com os alunos Aos técnicos Antônio Carlos e Wilson, pelo suporte no PAE e sempre que necessário. À técnica Denise, pelas conversas e por todo apoio na realização de análises, pedidos de reagentes e por sempre socorrer quando precisávamos.Ao técnico Tadeu, por sempre ajudar no corte de amostras e também confecção de todos tipos de aparatos que precisasse, sempre com um sorriso no rosto.Ao professor Fernando Cotting, pela amizade nos tempos em comum de pósgraduação no LEC, e pelos trabalhos em parceria.À professora Vera Rosa pelos trabalhos e parceiras ao longo dos anos de LEC. Aos professores Pedro Pessoa, Thiago Basso e René Schneider pelos ensinamentos durante a realização do PAE. Aos laboratórios LAREX e Adox, pelas realizações de análises de TG e UV-visível. O presente trabalho foi realizado com apoio financeiro do CNPq -Conselho Nacional de Desenvolvimento Científico e Tecnológico -Brasil ( processo nº 140187/2017-0) ABSTRACT SILVA, B.P. da. Synthesis and characterization of mesoporous SiO2, TiO2 and ZrO2, nanocontainers with encapsulation of corrosion inhibitor to be used in selfhealing coatings. 2022. Tese (Doutorado em

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Synthesis of hollow TiO2@SiO2 spheres via a recycling template method for solar heat protection coating

Cited by 27 publications

References 45 publications

Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Preparation and properties of mesoporous SiO₂/polyimide composite films

Síntese e caracterização de nanocontainers mesoporosos de SiO2, TiO2 e ZrO2, e encapsulamento de inibidor de corrosão neles para uso em revestimentos com poder de autorreparação.

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Synthesis of hollow TiO2@SiO2 spheres via a recycling template method for solar heat protection coating

Cited by 27 publications

References 45 publications

Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Shape-Stabilized PEGylated Silica Aerogel-Composite as an Energy Saving Building Material

Preparation and properties of mesoporous SiO2/polyimide composite films

Síntese e caracterização de nanocontainers mesoporosos de SiO2, TiO2 e ZrO2, e encapsulamento de inibidor de corrosão neles para uso em revestimentos com poder de autorreparação.

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Product

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Preparation and properties of mesoporous SiO₂/polyimide composite films