Light-Weight and High Thermal Insulating EPDM Composites Modified with Pretreated Hollow Phenolic Micro-Spheres

2013 ◽  
Vol 750-752 ◽  
pp. 140-145
Author(s):  
Zi Gao Zeng ◽  
Xiao Long Jia ◽  
Xiao Ping Yang ◽  
Jun Yi Zheng ◽  
Wu Sheng Li
Keyword(s):  
Specific Gravity ◽  
High Performance ◽  
Layer Structure ◽  
Light Weight ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Uniform Dispersion ◽  
Micro Sphere ◽  
New Generation ◽  
Insulating Properties

High performance thermal insulating ethylene-propylene-diene monomer (EPDM) composites were obtained with the addition of hollow phenolic micro-sphere. The effects of the pretreatment and content of micro-sphere on various properties of EPDM composites were evaluated. Experimental results showed that thermal conductivity and specific gravity of EPDM composites significantly decreased, which was due to the intact and uniform dispersion of pretreated micro-sphere throughout the EPDM matrix. With the content increasing of pretreated micro-sphere, the specific gravity of EPDM composites linearly decreased while the thermal stability increased. Specifically, EPDM composites showed the three-layer structure after ablation and the addition of pretreated micro-sphere distinctively enhanced thermal insulating properties of EPDM composites, which was attributed to multi-type heat conductivity resulted from hollow micro-spheres. Hollow phenolic micro-sphere exhibited great potential in preparing new generation of light-weight and high thermal insulating materials.

Study of Heat Transfer Process in Structure of Thermal Insulating Materials Based on Natural Fibers

2014 ◽  
Vol 1000 ◽  
pp. 227-230 ◽  
Author(s):  
Jiri Zach ◽  
Jitka Peterková ◽  
Martin Sedlmajer ◽  
Azra Korjenic
Keyword(s):  
Building Materials ◽  
Natural Fibers ◽  
Natural Fibre ◽  
Heat Transfer Process ◽  
Heat Propagation ◽  
Natural Fibres ◽  
Low Carbon ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Insulating Properties

Natural fibre based thermal insulating materials belong to progressive building materials representing one of the possible ways in sustainable development and which are characterised with low carbon trace and low value of primary bound energy. In case of industrially produced insulating materials (for instance using thermal connection method) the insulating materials based on natural fibres showed comparable properties with industrially produced insulating materials on building markets. In the view of thermal insulating properties the natural insulating material show slightly different behaviour in comparison with synthetic insulating materials which is caused by fibrous structure of insulating materials and low thermal conductivity of natural fibres (contrary to glass or mineral fibres). The paper describes results of research oriented on study of heat propagation within materials based on natural fibres originated from agriculture and stockbreeding.

Study of Hygrothermal Behavior of Insulation Materials Based on Natural Fibers

2015 ◽  
Vol 1124 ◽  
pp. 97-102
Author(s):  
Jiri Zach ◽  
Jitka Peterková
Keyword(s):  
Building Materials ◽  
Natural Fibers ◽  
Natural Fibre ◽  
Heat Propagation ◽  
Natural Fibres ◽  
Low Carbon ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Hygrothermal Behavior ◽  
Insulating Properties

Natural fibre based thermal insulating materials belong to progressive building materials representing one of the possible ways in sustainable development and which are characterised with low carbon trace and low value of primary bound energy. In case of industrially produced insulating materials (for instance using thermal connection method) the insulating materials based on natural fibres showed comparable properties with industrially produced insulating materials on building markets. In the view of thermal insulating properties the natural insulating material show slightly different behavior in comparison with synthetic insulating materials which is caused by fibrous structure of insulating materials and low thermal conductivity of natural fibres (contrary to glass or mineral fibres). The paper describes results of research oriented on study of heat propagation within materials based on natural fibres originated from agriculture and stockbreeding.

Configuration and Pyrological Performance of Self Thermal Insulating Blocks

2011 ◽  
Vol 250-253 ◽  
pp. 668-672
Author(s):  
Xin Wei Ma ◽  
Li Xiong Yang ◽  
Yu Yan Ji
Keyword(s):  
Thermal Conductivity ◽  
Energy Consumption ◽  
Energy Conservation ◽  
Thermal Resistance ◽  
Light Weight ◽  
Insulating Materials ◽  
Thermal Insulating ◽  
Concrete Shell ◽  
And Performance ◽  
Good Heat

Energy conservation is a hot topic in the field of construction. To increase the thermal resistance of the enclosing structure of buildings, a T-shaped self thermal insulating block is designed. The particular shape, light weight concrete shell and heat insulating materials filled in the cavities result in a good heat insulating effect. Thermal bridges on the wall can significantly be reduced, which leads to a great improvement in thermal resistance, and performance of energy conservation. The thermal conductivity of wall made of this kind of blocks could be as low as 0.088W/ m·K, by which energy consumption could be saved by 65% comparing with wall made of bricks in 1980s.

Research on Thermal-Insulating Material and Roadway Cooling with High Geotherm

2012 ◽  
Vol 512-515 ◽  
pp. 915-921
Author(s):  
Yan Wei Liu ◽  
Guo Fu Li ◽  
Xiao Yong Liu
Keyword(s):  
Thermal Conductivity ◽  
Compressive Strength ◽  
High Performance ◽  
Experimental Models ◽  
Industrial Test ◽  
Mine Pressure ◽  
Test Model ◽  
Insulating Materials ◽  
Insulating Material ◽  
Thermal Insulating

The research aims to develop inorganic thermal-insulating materials of high performance, decrease high geothermal emissions from hot rock to the roadway, reduce the roadway airflow temperature, and achieve mine cooling and energy saving eventually. Firstly, the best proportion of inorganic thermal-insulating materials of high performance was designed, and a test model for thermal conductivity and mechanical analysis has been built. And through the test of thermal-insulating of the material and mechanical properties, the relation equations between vitreous micro-bead content (the main agent of thermal-insulating material) and thermal conductivity, uniaxial compressive strength, confined compressive strength have been obtained respectively. Secondly, the feature, the fitting and coupling features between the experimental models and engineering conditions in practice were analyzed comparatively, which could provide theoretical basis for the design and application of thermal-insulating materials of high performance. The industrial test shows that with thermal-insulating materials of high performance in application, the roadway airflow temperature was reduced significantly and could meet the requirements of mine pressure. Therefore, the research could offer an effective way for the mine thermal-insulating and cooling under high geothermal conditions.

scholarly journals Using of Aerogel to Improve Thermal Insulating Properties of Windows

2018 ◽  
Vol 14 (1) ◽  
pp. 2-11 ◽  
Author(s):  
Denisa Valachova ◽  
Nada Zdrazilova ◽  
Vladan Panovec ◽  
Iveta Skotnicova
Keyword(s):  
Thermal Conductivity ◽  
Thermal Insulation ◽  
Building Structures ◽  
Insulating Materials ◽  
Insulating Material ◽  
Composite Systems ◽  
Thermal Insulating ◽  
Technical Requirements ◽  
Technical Properties ◽  
Insulating Properties

AbstractFor the best possible thermal-technical properties of building structures it is necessary to use materials with very low thermal conductivity. Due to the increasing thermal-technical requirements for building structures, the insulating materials are developed. One of the modern thermal insulating materials is so-called aerogel. Unfortunately, this material is not used in the field of external thermal insulation composite systems because of its price and its properties. The aim of this paper is to present possibilities of using this insulating material in the civil engineering - specifically a usage of aerogel in the production of windows.

scholarly journals Sustainable Lightweight Insulation Materials from Textile-Based Waste for the Automobile Industry

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1241
Author(s):  
Zengxiao Cai ◽  
Md Abdullah Al Faruque ◽  
Alper Kiziltas ◽  
Deborah Mielewski ◽  
Maryam Naebe
Keyword(s):  
Automobile Industry ◽  
Layer Structure ◽  
Fibre Diameter ◽  
Cost Effective ◽  
Insulating Materials ◽  
Environmentally Sustainable ◽  
Thermal Insulating ◽  
Nonwoven Materials ◽  
Recycle And Reuse ◽  
Antibacterial And Antifungal

Globally, automotive manufacturers are looking for ways to produce environmentally sustainable and recyclable materials for automobiles to meet new regulations and customer desires. To enable the needs for rapid response, this study investigated the feasibility of using waste and virgin wool fibres as cost-effective and sustainable alternatives for automotive sound and heat insulation using a chemical-free approach. Several properties of the currently available commercial automotive insulators were investigated in order to facilitate the designing of green wool-based needle-punched nonwoven materials. The effect of fibre diameter, nonwoven surface, layer structure, thickness, and area density on sound absorption and thermal resistance was investigated. The results suggested that the wool nonwoven materials, fabricated using waste and virgin wool fibres, possessed extremely efficient acoustic and thermal insulating properties comparable with the currently used commercial synthetic insulating materials. Besides, the wool nonwoven materials showed identical antibacterial and antifungal properties with a greater biodegradation rate (50%) than that of the commercial synthetic insulating materials. Hence, this study showed that natural wool fibres have the potential to be used as green, lightweight, and sustainable materials in the automobiles, while they qualify for Reuse–Recycle and Reuse–Recover purposes at the end-of-life of vehicles.

scholarly journals Manufacture of Spongy Gravel from Obsidian to Produce Lightweight and Thermal-Insulating Concrete

2021 ◽  
pp. 2286-2295
Author(s):  
Mohammed A. AL- Nuaimi ◽  
Basim F. Al-kubaisi ◽  
Salam O. Al-heety
Keyword(s):  
Thermal Conductivity ◽  
Specific Gravity ◽  
The Body ◽  
The Other ◽  
Light Weight ◽  
Aggregate Concrete ◽  
Obsidian Sample ◽  
Thermal Insulating ◽  
A Value ◽  
Physical Tests

    The present study aims to convert obsidian rocks into spongy gravel for the use in the production of lightweight and heat insulating concrete. The rocks were burned at 960°C to achieve maximum swelling of the samples, then broken into gravel and sand sizes. For comparison purposes, two other types of aggregates were used, namely pumice and basalt. The main physical tests, such as specific gravity, bulk density, porosity, and water absorption were performed. For testing the resistance of samples to alkalinity, KOH and Na OH solutions were used. The results showed that the obsidian sample gave the best specifications, where its specific gravity was 0.33, while the values were 1.1 for pumice and 2.7 for basalt, with the same results being applied to the other physical tests. After forming the concrete cubes of the three types of aggregates with three mixing proportions (1, 1.5, and 3 of cement, sand, gravel, respectively), the most important physical, mechanical, and chemical tests were performed along with their specific ages. The results were distinct, specifically the specific gravity values of the aggregate concrete samples A and B (1.3 and 1.5, respectively, as compared to the basalt sample, which recorded a value of 2.5. As for the thermal conductivity, a distinct value was recorded for the obsidian sample (0.16 W/m.k) as compared to the pumice and basalt samples (2.1 and 1.32 W/m.k, respectively). Perhaps the reason behind this variation is the pores type of the aggregate produced for the obsidian sample, which were of the closed system. This prevents the seeping of water and cement materials into the body of gravel, keeping it at light weight and providing it with high thermal insulation. As for the alkalinity test, there was no evidence of a reaction with the alkali cement in the obsidian and pumice samples, except for a slight reaction that appeared in the basalt sample.

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