Investigation of thermal insulation performance of glass/carbon fiber-reinforced silica aerogel composites

Hung, Wei-Cheng; Horng, Richard S.; Shia, Rung-En

doi:10.1007/s10971-020-05444-3

Cited by 37 publications

(13 citation statements)

References 16 publications

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“…57 Another study demonstrated that the flexural strength of glass/carbon fiber-reinforced silica aerogel composites ranged from 0.92 MPa to 2.97 MPa. 58…”

Section: Resultsmentioning

confidence: 99%

“…57 Another study demonstrated that the flexural strength of glass/ carbon fiber-reinforced silica aerogel composites ranged from 0.92 MPa to 2.97 MPa. 58 When the overall evaluation was made for this study, mechanical properties decreased with the increased zinc borate amounts. The formation of a fragile surface between the zinc borate and polymer was one of the causes of the decline in mechanical properties.…”

Section: Mechanical Properties Of Pvac Foamsmentioning

confidence: 89%

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Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers

Ergun,

Ozen,

Yildirim

et al. 2023

Cellular Polymers

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The study developed and designed polyvinyl acetate (PVAc) foams using advanced freeze-drying technology, which exhibited good heat-insulating ability, flame retardancy, and mechanical properties. Different combinations of bleach kraft pulp, water-soluble chitosan, and zinc borate were used to reinforce the foams. The foams exhibited desirable compression and flexural properties, with compression strength and compression modulus ranging from 0.01 MPa to 0.08 MPa and 0.05 MPa to 0.29 MPa, respectively, while flexural strength and flexural modulus ranged from 0.12 MPa to 5.37 MPa and 9.86 MPa to 260,85 MPa, respectively. The use of zinc borate as a reinforcement resulted in improved thermal properties and reduced mass loss at 600°C by 20.69%. Thermal conductivity tests indicated that the foams had low thermal conductivity values ranging from 0.037 W/mK to 0.074 W/mK. The foams with zinc borate (60 g/L) and high molecular weight water-soluble chitosan (70 g/L) reinforcement exhibited high limiting oxygen index (LOI) of 28.72%. Overall, the results suggest that the PVAc foams could serve as a promising sustainable alternative in thermal insulation and construction fields.

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“…57 Another study demonstrated that the flexural strength of glass/carbon fiber-reinforced silica aerogel composites ranged from 0.92 MPa to 2.97 MPa. 58…”

Section: Resultsmentioning

confidence: 99%

Section: Mechanical Properties Of Pvac Foamsmentioning

confidence: 89%

Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers

Ergun,

Ozen,

Yildirim

et al. 2023

Cellular Polymers

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“…It has a fire rating of A1. Glass wool has good vapor permeability, i.e., it only slightly impedes the movement of steam [22][23][24]. In the case of multilayer thermal insulation, it is recommended for use just below the outermost layer.…”

Section: The Tested Materialsmentioning

confidence: 99%

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

2021

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In the European Union, almost 40% of all energy consumption comes from buildings, while another 20–25% comes from transport. In the European Union, including Hungary, only buildings with almost-zero energy demand could be built after 2020, and the use of renewable energies must be strengthened. The Renewable Directive stipulated that by 2020, the share of renewable energy in buildings must be 25%, and in transport it must be 10%; the use of electric vehicles is vital. There are about four million dwellings in Hungary, of which approximately three million need to be renovated, and only some of these (a few hundred) meet the cost-optimized level of the 2020 directive. The use of insulation materials is very important in the transport sector, too. Insulation materials are also used by aircraft and electric vehicles. To reduce the energy loss from buildings, different insulation materials can be used; investigations of insulation materials are very important. This paper presents a comprehensive research report on insulation materials which could be used for building elements, HVAC (heating, ventilation, and air conditioning appliances) equipment, and vehicles. In this paper, laboratory investigations will be presented along with calculations to better understand the properties and behavior of these materials. For this, firstly structural analysis with scanning electron microscope will be presented. Moreover, the paper will present thermal conductivity and combustion heat measurement results. The sorption and hydrophobic behavior of the materials will be also revealed. Finally, the article will also display differential scanning calorimetry measurements and Raman spectroscopy results of the samples. The research was conducted on four different types of colorized microfiber lightweight wool insulation.

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“…Silica aerogels are generally used in two different forms in thermal insulation applications according to their final physical structures [18,19]. While monolith aerogels are used in bare form [20,21], granular/powder aerogels are used with any fiber as a composite [22][23][24][25] or by embedding in a blanket [26,27] for the thermal insulation applications. On the other hand, Kim et al reported the investigation of the glazing systems with silica aerogel films [28].…”

Section: Introductionmentioning

confidence: 99%

Development of Vinyl-substituted Silica Based Coatings to Improve the Thermal Insulative Properties of Glass Surfaces

Koç,

Çok,

Devrim

et al. 2023

Preprint

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Thermal insulation of glass surfaces is essential in many respects because the glazing systems are the materials that lose the most energy in buildings or household devices. Therefore, application of coatings with low thermal conductivity is considered a key step in establishing the energy-efficient systems. In this study, vinyl substituted silica aerogel coatings were developed by the simple sol-gel method and applied on the glass substrates as in the bilayer form. Coating layers were composed of hydrophilic primary layer and hydrophobic top layer, which provides thermal insulation properties and acts as a protective layer barrier against water at the same time. The first layer consisted of SiO2 nanoparticles particles along with silica precursor of TEOS, while, the second layer was prepared with tetraethyl orthosilicate (TEOS) and vinyltrimethoxysilane (VTMS), which provided surface properties. The surface modification was applied with trimethylsilyl chloride (TMCS) to enhance the hydrophobic properties of surfaces. The aerogel-coated glasses were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Contact Angle (CA), and Thermal Conductivity Measurement. The thermal conductivity coefficient and water contact angle values were obtained as 0.126 W/mK and 88°. The experimental results showed that 85% decrease in thermal conductivity of glass substrate (from 0.8 to 0.126 W/mK) was obtained by applying bilayer silica aerogel coating.

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Investigation of thermal insulation performance of glass/carbon fiber-reinforced silica aerogel composites

Cited by 37 publications

References 16 publications

Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers

Mechanical and thermal properties of polyvinyl acetate foams reinforced with biopolymers

Systematic Analysis of Micro-Fiber Thermal Insulations from a Thermal Properties Point of View

Development of Vinyl-substituted Silica Based Coatings to Improve the Thermal Insulative Properties of Glass Surfaces

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