High-Performance Insulation Materials

2013 ◽  
pp. 457-481 ◽  
Author(s):  
Hans-Peter Ebert
Keyword(s):  
High Performance ◽  
Insulation Materials

scholarly journals Aerogel Based High Performance Thermal Insulation Materials

2019 ◽  
Vol 553 ◽  
pp. 012043
Author(s):  
Mohanapriya Venkataraman ◽  
Rajesh Mishra ◽  
Jiri Militky ◽  
Dana Kremenakova ◽  
Petru Michal
Keyword(s):  
Thermal Insulation ◽  
High Performance ◽  
Insulation Materials

Lignin-based foams as insulation materials: a review

Holzforschung ◽  
2018 ◽  
Vol 73 (1) ◽  
pp. 117-130 ◽  
Author(s):  
Vebi Mimini ◽  
Vasken Kabrelian ◽  
Karin Fackler ◽  
Hubert Hettegger ◽  
Antje Potthast ◽  
...  
Keyword(s):  
High Performance ◽  
New Technologies ◽  
Terrestrial Plants ◽  
Insulation Materials ◽  
Improvement Potential ◽  
The Matrix ◽  
Application Potential ◽  
Large Application ◽  
Low Performance ◽  
Technical Lignins

AbstractThe bulk use of renewable polymers is currently largely limited to cellulose and, less significantly, hemicelluloses. Technical lignins are only applied in novel materials to a rather limited extent, although bulk lignin utilization is a worldwide research object. Native lignins, which belong to the second or third most abundant biopolymers of terrestrial plants, are mostly used in the form of technical lignins from wood pulping processes; they are employed in low-performance sectors or simply burnt for the generation of energy. Technical lignins are available in huge quantities and have a large application potential, mainly in areas where their aromatic nature is of relevance. This review presents the state of the art of foamed lignin-based polymers (lignofoams) as high-performance insulation materials. In the focus of this presentation are the fundamental foaming principles and influential agents that have an improvement potential concerning the matrix interactions between technical lignins (including lignosulfonates) and a copolymer in foam composites. The different approaches for foam preparation are critically compared. In general, the reviewed papers disclose that the lignin part in foams should be less than 37%. There are significant difficulties to improve the properties of lignofoams, and thus intensive research is needed to find better formulations and new technologies.

scholarly journals New Aerogel Products for Construction Use: Product Specifications, Application Examples, Practical Aspects

2020 ◽  
Vol 172 ◽  
pp. 21005
Author(s):  
Eva Günther ◽  
Marc Fricke ◽  
Wibke Lölsberg ◽  
Arne Klinkebiel ◽  
Dirk Weinrich
Keyword(s):  
High Performance ◽  
Cost Effective ◽  
General Purpose ◽  
Water Repellent ◽  
Knudsen Effect ◽  
Insulation Materials ◽  
Key Characteristics ◽  
Structural Details ◽  
Problem Solvers ◽  
Product Specifications

Two new high-performance insulation materials (HPIM) for the usage in buildings are presented. We show how to use and apply the upcoming aerogel products and give examples for structural details. While both materials achieve very low lambda values due to Knudsen-Effect of aerogels, they differ clearly in other key characteristics. SLENTEX® is a slim, mechanically flexible, non-combustible aerogel mat. It is open for water vapor diffusion but water-repellent. It is suitable for applications with strict fire regulations since it is a purely mineral-based product. SLENTITE® is a homogeneous polyurethane-based aerogel insulation board without lamination or encapsulation layers and also vapor open. Its surface adheres to almost any organic or inorganic binder. It can be processed very much like conventional insulation boards. While their handling and application are very similar to other insulation materials, aerogels are however no general-purpose insulation products: due to their sophisticated production process, and thus higher price compared to conventional insulation products, HPIM are best applied as problem solvers. In well-motivated situations, e.g. where space is limited or particular aesthetic requirements apply, they offer cost effective alternatives to standard solutions.

scholarly journals Thermal characterization of different graphite polystyrene

2018 ◽  
Vol 9 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Á. Lakatos ◽  
I. Deák ◽  
U. Berardi
Keyword(s):  
Thermal Conductivity ◽  
High Performance ◽  
Thermal Characterization ◽  
Expanded Polystyrene ◽  
High Moisture ◽  
Insulating Materials ◽  
Insulation Materials ◽  
Vacuum Insulation ◽  
Study Laboratory

The development of high performance insulating materials incorporating nanotechnologies has enabled considerable decrease in the effective thermal conductivity. Besides the use of conventional insulating materials, such as mineral fibers, the adoption of new nano-technological materials such as aerogel, vacuum insulation panels, graphite expanded polystyrene, is growing. In order to reduce the thermal conductivity of polystyrene insulation materials, during the manufacturing, nano/micro-sized graphite particles are added to the melt of the polystyrene grains. The mixing of graphite flakes into the polystyrene mould further reduces the lambda value, since graphite parts significantly reflect the radiant part of the thermal energy. In this study, laboratory tests carried out on graphite insulation materials are presented. Firstly, thermal conductivity results are described, and then sorption kinetic curves at high moisture content levels are shown. The moisture up-taking behaviour of the materials was investigated with a climatic chamber where the relative humidity was 90% at 293 K temperature. Finally, calorific values of the samples are presented after combusting in a bomb calorimeter.

Thermal Design on Cement-Based Vitrified Microsphere Insulation Mortar Based on 65% Building Energy Efficiency Standard

2011 ◽  
Vol 347-353 ◽  
pp. 4081-4088
Author(s):  
Jian Hui Yang ◽  
Ling Yan Lv ◽  
Zhen Zhuan Xiong
Keyword(s):  
Energy Efficiency ◽  
High Performance ◽  
Building Energy ◽  
Thermal Design ◽  
Building Energy Efficiency ◽  
Insulation Materials ◽  
Energy Efficiency Standard ◽  
Under Construction ◽  
Energy Efficiency Standards ◽  
New Generation

With the 65% building energy efficiency standards being implemented, the existing external wall insulation technology will face severe challenges. The research and application of the high performance inorganic insulation materials are solicited, because the traditional organic insulation materials representative with polystyrene have some defects, such as poor fire resistance, poor durability, short service and no synchronous with the life of structure, and environmental pollution. After the big fires of the CCTV building in 2009 and the building under construction at Shanghai pudong south road NO.1 in 2010, October 8 in the morning being occurred, the new generation inorganic insulation materials represented by vitrified microsphere, are getting increasing attention. After the thermal simulation of external walls, roof, floor and windows being calculated, it is concluded that its energy-saving rate is far more than energy efficiency 50% standard, and which is close to energy efficiency 65% standard, even if taking only vitrified microsphere as the insulation mortar for outer walls of building.

scholarly journals Air-Filled Nanopore Based High-Performance Thermal Insulation Materials

2017 ◽  
Vol 132 ◽  
pp. 231-236 ◽  
Author(s):  
Haakon Fossen Gangåssæter ◽  
Bjørn Petter Jelle ◽  
Sohrab Alex Mofid ◽  
Tao Gao
Keyword(s):  
Thermal Insulation ◽  
High Performance ◽  
Insulation Materials

scholarly journals Theoretical Modeling and Inverse Analysis of Thermal Conductivity of Skeletons in SiO2 Nano-Insulation Materials

Nanomaterials ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 934 ◽  
Author(s):  
Xiao-Chen Zhang ◽  
Xin-Lin Xia ◽  
Dong-Hui Li ◽  
Chuang Sun
Keyword(s):  
Heat Transfer ◽  
Thermal Conductivity ◽  
Size Effect ◽  
High Performance ◽  
Insulation Material ◽  
Material Technology ◽  
Insulation Materials ◽  
Comparison Results ◽  
Reverse Method ◽  
Transfer Mechanisms

With the developments in high-performance nano-insulation material technology, theoretical studies on the heat transfer mechanisms in these materials have been conducted. However, the conductivity of nanometer-sized skeletons is still unclear. It is necessary to clarify the thermal conductivity of nanometer-sized solid skeletons in order to better understand the heat transfer mechanisms in nano-insulation materials. In the present study, a theoretical model for the thermal conductivity of nanometer-sized skeletons in nano-insulation materials is presented based upon the meso-structure of the material and the equation of phonon transfer. The size effect in thermal conductivity of the nanometer-sized particles is studied numerically, and the thermal conductivity is theoretically obtained. At the same time, a reverse method is established for the thermal conductivity of nanometer-sized particles based on the method of particle swarm optimization (PSO). The skeleton thermal conductivity for a specific nano-insulation material with a density of 110 kg/m3 and porosity of 0.94 is identified based upon experimental data from literature. Comparison results show that the theoretical conductivity of nanometer-sized skeletons and the identified results give the values of 0.145 and 0.124 W/(m K), respectively, clearly revealing obvious an size effect in the thermal conductivity of nanometer-sized skeletons.

Sign in / Sign up

Export Citation Format

Share Document