Studies on the barrier performance and adhesion strength of novel barrier films for vacuum insulation panels

Miesbauer, Oliver; Kücükpinar, Esra; Kiese, Sandra; Carmi, Yoash; Noller, Klaus; Langowski, Horst‐Christian

doi:10.1016/j.enbuild.2014.06.054

Cited by 14 publications

(6 citation statements)

References 18 publications

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“…However, vacuum deposited layers are not completely tight since they contain defects formed during the deposition process ( Figure 4 ) or due to mechanical stress [ 70 , 71 ]. The protection of vacuum insulation panels, flexible photovoltaic modules and organic light emitting diodes (OLEDs) against environmental influences therefore requires the combination of these layers with polymeric materials in complex multilayer structures exhibiting a high barrier performance [ 77 , 78 , 79 ].…”

Section: Processingmentioning

confidence: 99%

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

et al. 2017

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For the last decades, nanocomposites materials have been widely studied in the scientific literature as they provide substantial properties enhancements, even at low nanoparticles content. Their performance depends on a number of parameters but the nanoparticles dispersion and distribution state remains the key challenge in order to obtain the full nanocomposites’ potential in terms of, e.g., flame retardance, mechanical, barrier and thermal properties, etc., that would allow extending their use in the industry. While the amount of existing research and indeed review papers regarding the formulation of nanocomposites is already significant, after listing the most common applications, this review focuses more in-depth on the properties and materials of relevance in three target sectors: packaging, solar energy and automotive. In terms of advances in the processing of nanocomposites, this review discusses various enhancement technologies such as the use of ultrasounds for in-process nanoparticles dispersion. In the case of nanocoatings, it describes the different conventionally used processes as well as nanoparticles deposition by electro-hydrodynamic processing. All in all, this review gives the basics both in terms of composition and of processing aspects to reach optimal properties for using nanocomposites in the selected applications. As an outlook, up-to-date nanosafety issues are discussed.

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Section: Processingmentioning

confidence: 99%

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

et al. 2017

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“…To be able to select theoretically optimum core materials for the various applications, the most important properties in each case must be defined. The main criteria for selecting a suitable core material for the various applications were selected as follows: • Building sector: Even though researchers are working intensively on the development of new and increasingly better highbarrier films for VIPs, 36 a minimum degree of gas diffusion through the envelope can never be avoided. Therefore, in long-term applications, like the building sector, in addition to a low initial thermal conductivity, and the longevity of the VIP is primarily decisive.…”

Section: Core Materials For Different Applicationsmentioning

confidence: 99%

Silica‐based core materials for thermal superinsulations in various applications

Sonnick

Nirschl

Rädle

2022

Intl J of Energy Research

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Summary Vacuum insulation panels (VIP) are usually manufactured using standardized manufacturing processes based on empirical values and in most cases with any fumed silica as the main component of the core material. However, not all applications have the same requirements in terms of thermal conductivity and service life. Therefore, it is useful to adapt the kind of core materials and their product specifications, such as particle size and porosity, to the different applications. Furthermore, in some applications cheaper core materials, like precipitated silica, would be a reasonable alternative. To replace the time‐consuming series of measurements for this purpose, this work offers comprehensive parameter studies to determine the optimum product properties of precipitated silica, fumed silica, silica gel, and glass spheres for use in the building sector, in transport boxes, as a superinsulation at atmospheric pressure, and as a switchable VIP. As a result, not only the preferred materials but also their porosities and particle sizes are presented. For atmospheric pressure and construction applications, fumed silica has to be preferred. For the transport sector and switchable VIPs as well as certain special applications, precipitated silica and silica gel may well be reasonable alternatives.

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“…The advantages of this method are the low process costs and the often-simple handling and applicability. However, this method also has the disadvantage that a layer thickness in the range of 10–100 µm is required for effective barrier sealings [ 1 , 2 ].…”

Section: Introductionmentioning

confidence: 99%

Microwave Plasma-Enhanced Parylene–Metal Multilayer Design from Metal Salts

Weber

Vorobev²,

Viöl

2022

Nanomaterials

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In this paper, a new approach for the synthesis of Parylene–metal multilayers was examined. The metal layers were derived from a metal salt solution in methanol and a post-drying plasma reduction treatment. This process was designed as a one-pot synthesis, which needs a very low amount of resources and energy compared with those using electron beam sputtering processes. The Parylene coatings were obtained after reduction plasma treatments with Parylene C. Therefore, a Parylene coating device with an included plasma microwave generator was used to ensure the character of a one-pot synthesis. This process provided ultra-thin metal salt layers in the range of 1–2 nm for layer thickness and 10–30 nm for larger metal salt agglomerates all over the metal salt layer. The Parylene layers were obtained with thicknesses between approx. 4.5 and 4.7 µm from ellipsometric measurements and 5.7–6.3 µm measured by white light reflectometry. Tensile strength analysis showed an orthogonal pulling stress resistance of around 4500 N. A surface roughness of 4–8 nm for the metal layers, as well as 20–29 nm for the Parylene outer layer, were measured. The wettability for non-polar liquids with a contact angle of 30° was better than for polar liquids, such as water, achieving 87° on the Parylene C surfaces.

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Studies on the barrier performance and adhesion strength of novel barrier films for vacuum insulation panels

Cited by 14 publications

References 18 publications

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

Review on the Processing and Properties of Polymer Nanocomposites and Nanocoatings and Their Applications in the Packaging, Automotive and Solar Energy Fields

Silica‐based core materials for thermal superinsulations in various applications

Microwave Plasma-Enhanced Parylene–Metal Multilayer Design from Metal Salts

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