Microstructure and Thermal Characterization of Multilayer Insulation Materials Based on Silica Aerogels

Author(s):  
Chen SHENG ◽  
Yun YU ◽  
Yang YU ◽  
Le MI ◽  
Gen-Chu TANG ◽  
...  
2018 ◽  
Vol 9 (2) ◽  
pp. 163-168 ◽  
Author(s):  
Á. Lakatos ◽  
I. Deák ◽  
U. Berardi

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.


Energies ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5700
Author(s):  
Maatouk Khoukhi ◽  
Abeer Dar Saleh ◽  
Ahmed Hassan ◽  
Shaimaa Abdelbaqi

Although many advanced insulation materials have been recently developed, very few are eco-friendly and their production requires a substantial amount of energy and complex manufacturing processes. To address this issue, a bio-based thermal insulation material was developed using short- and long-grained puffed rice. A set of experiments was subsequently carried out to identify the best rice type and the optimal range for the most influential parameters (sample amount, temperature, and moisture level). Our findings revealed that short-grained rice exhibited greater puffing ability and was thus adopted in further material optimization experiments. These assessments indicated that the most optimal thermal conductivity of the insulation material and the highest puffing ratio was attained at 12–15% moisture, 260–270 °C temperature, and 15–18 g sample weight. The thermal properties, including thermal conductivity and fire reaction, and thermal performance of samples obtained using these parameters were similar to those of common insulation materials.


2019 ◽  
Vol 160 ◽  
pp. 114026 ◽  
Author(s):  
Xinpeng Zhao ◽  
Sohrab A. Mofid ◽  
Majed R. Al Hulayel ◽  
Gabriel W. Saxe ◽  
Bjørn Petter Jelle ◽  
...  

2019 ◽  
Vol 138 (4) ◽  
pp. 2505-2513 ◽  
Author(s):  
Sergiu-Valeriu Georgescu ◽  
Camelia Coşereanu ◽  
Adriana Fotin ◽  
Luminiţa-Maria Brenci ◽  
Liviu Costiuc

2005 ◽  
Vol 82 (3) ◽  
pp. 761-768 ◽  
Author(s):  
M. Beneš ◽  
V. Pla?ek ◽  
G. Matuschek ◽  
A. A. Kettrup ◽  
K. Györyová ◽  
...  

1995 ◽  
Vol 186 ◽  
pp. 285-290 ◽  
Author(s):  
Daehee Lee ◽  
Peter C. Stevens ◽  
Shou Quan Zeng ◽  
Arlon J. Hunt

1999 ◽  
Vol 6 (1) ◽  
pp. 101-108 ◽  
Author(s):  
E. Delacre ◽  
D. Defer ◽  
E. Antczak ◽  
B. Duthoit

2005 ◽  
Vol 125 ◽  
pp. 177-180
Author(s):  
T. Lopez ◽  
M. Picquart ◽  
G. Aguirre ◽  
Y. Freile ◽  
D. H. Aguilar ◽  
...  

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