Utilization of size-tunable hollow silica nanospheres for building thermal insulation applications

The main goal of this study was to review current studies on the state of the art of wood constructions with a particular focus on energy efficiency, which could serve as a valuable source of information for both industry and scholars. This review begins with an overview of the role of materials in wood buildings to improve energy performance, covering structural and insulation materials that have already been successfully used in the market for general applications over the years. Subsequently, studies of different wood building systems (i.e., wood-frame, post-and-beam, mass timber and hybrid constructions) and energy efficiency are discussed. This is followed by a brief introduction to strategies to increase the energy efficiency of constructions. Finally, remarks and future research opportunities for wood buildings are highlighted. Some general recommendations for developing more energy-efficient wood buildings are identified in the literature and discussed. There is a lack of emerging construction concepts for wood-frame and post-and-beam buildings and a lack of design codes and specifications for mass timber and hybrid buildings. From the perspective of the potential environmental benefits of these systems as a whole, and their effects on energy efficiency and embodied energy in constructions, there are barriers that need to be considered in the future.

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“… Comparison of the structure of a vacuum insulation panel (VIP) and nano-insulation material (NIM). Source: modified from [ 217 , 218 , 219 ]. …”

Section: Figurementioning

confidence: 99%

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

Cabral

Blanchet

2021

Materials

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“…examined the thermal properties of the sub 100 nm region. [ 5 ] There are few cases where LFA was used for aerogel samples up to 1500°C. They have been performed by Wiener et al.…”

Section: Introductionmentioning

confidence: 99%

High‐Temperature Thermal Transport in Porous Silica Materials: Direct Observation of a Switch from Conduction to Radiation

Neuhöfer

Herrmann

Lebeda

et al. 2021

Adv Funct Materials

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Efficient thermal insulation at high temperatures poses stringent requirements on suitable materials. Low density, porous inorganic structures with pore sizes in the sub‐micrometer range are of particular interest for such materials to control heat conduction. Simultaneously, thermal radiation has to be suppressed, which depends on the optical properties of the constituents. Here, the authors demonstrate a direct observation of the transition from a conduction dominated to a radiation dominated thermal transport mechanism for the case of particulate silica materials at temperatures reaching up to 925 °C. A detailed analysis of the radiative transport through bulk silica as well as solid and hollow silica particles is provided. Optical transparency at high temperatures is the driving force, whereas surface wave modes barely contribute, particularly in case of the insulating particle packings. The existing analytical framework of laser flash analysis is extended to qualitatively describe the radiative and conductive heat transport by two independent diffusive transport models. The analysis provides a better understanding of the challenges to fabricate and analyze efficient thermal insulation materials at high operating temperatures, where multiple heat transport mechanisms need to be controlled.

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“…The large surface area allows for efficient binding of target analytes, leading to sensitive detection. The low thermal conductivity of silica and the hollow interior structure make hollow silica particles useful as insulating materials in applications where thermal insulation is required [ 12 ]. Depending on their size and shape, hollow silica particles can exhibit interesting optical properties, such as photonic effects or light scattering [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Facile Synthesis of Surface-Modified Hollow-Silica (SiO2) Aerogel Particles via Oil–Water–Oil Double Emulsion Method

Kapadnis,

Nam,

Kim

et al. 2024

Gels

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Due to their high surface area and low weight, silica aerogels are ideally suited for several uses, including drug delivery, catalysis, and insulation. Oil–water–oil (OWO) double emulsion is a simple and regulated technique for encasing a volatile oil phase in a silica shell to produce hollow silica (SiO2) aerogel particles by using hydrophilic and hydrophobic emulsifiers. In this study, the oil–water–oil (OWO) double emulsion method was implemented to synthesize surface-modified hollow silica (SiO2) aerogel particles in a facile and effective way. This investigation mainly focused on the influence of the N-hexane-to-water glass (OW) ratio (r) in the first emulsion, silica (water glass) content concentration (x), and surfactant concentration (s) variations. Furthermore, surface modification techniques were utilized to customize the aerogel’s characteristics. The X-ray diffraction (XRD) patterns showed no imprints of impurities except SiO2. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) images highlight the hollow microstructure of silica particles. Zeta potential was used to determine particle size analysis of hollow silica aerogel particles. The oil–water–oil (OWO) double emulsion approach was successfully employed to synthesize surface-modified hollow silica (SiO2) aerogel particles, providing precise control over the particle characteristics. By the influence of the optimization condition, this approach improves the aerogel’s potential applications in drug delivery, catalysis, and insulation by enabling surface modifications.

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Utilization of size-tunable hollow silica nanospheres for building thermal insulation applications

Cited by 9 publications

References 49 publications

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

A State of the Art of the Overall Energy Efficiency of Wood Buildings—An Overview and Future Possibilities

High‐Temperature Thermal Transport in Porous Silica Materials: Direct Observation of a Switch from Conduction to Radiation

Facile Synthesis of Surface-Modified Hollow-Silica (SiO2) Aerogel Particles via Oil–Water–Oil Double Emulsion Method

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