Different types of materials can play different roles in heat resistance. If we want to keep the room warm in the dark winter, we can use insulation on the exterior walls to reduce heat loss. Conversely, in order to keep the room cool, it is necessary to use materials with better thermal conductivity. So in the laboratory, can a new material that combines two characteristics?
(From: University of Bayreuth, via New Atlas)
The good news is that, with the collaboration of scientists at Bayreuth University and the Max Planck Polymer Institute, they have succeeded in combining the insulation properties of materials such as polystyrene with the thermal conduction of heavy metals commonly used for heat dissipation.
The technological breakthrough is due to a method of controlling heat propagation, which transmits heat through the oscillation of a single molecule.
These molecules continue to move toward symts, and the team solves the problem by creating a material made of nano-thick glass panels.
The glass plates are dotted with polymer chains to form a stack of thin wafers, which itself happens to be transparent. The multi-layered working style in the material is somewhat similar to double-glazed windows, but still needs to be given truly unique properties.
Markus Retsch, a professor at The University of Bayreuth, says that materials produced in this way share the principle of double glazing. It’s just that the new material is not just two layers, but hundreds of layers.
Based on this, the new material can greatly reduce heat transfer in a vertical direction. At the same time, there is no heat-blocking interface in each layer, so it can be effectively conducted along the layers in parallel direction.
After testing the material, the scientists reported that the thermal conductivity along each layer was comparable to that of thermal-conducting silicon ethos used in computer chips. But in the vertical direction, the thermal conductivity is only 1/40.
At the same time, the study found that the insulation performance of new materials is quite excellent, about six times the current commercial plastic products.
Even better, this unique material also has unique properties in terms of sound transmission. After all, when sound travels through the material, it behaves in a similar way to heat.
Study co-author Professor Georg Fytas said: “This structured but transparent material is ideal for understanding how sound travels in different directions.”
The researchers will then adjust the material’s design to better understand these processes. As for practical applications, the team believes it can start with high-performance LEDs because they require robust heat dissipation and insulation.
Details of the study have been published in the recently published International Edition of Applied Chemistry. Originally published as:
Tunable Thermoelastic Anisotropy in Hybrid Bragg Stacks with Extreme Polymer Polymer