Fibrous Multilayer Structures for Advanced Applications

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F23%3A00011977" target="_blank" >RIV/46747885:24410/23:00011977 - isvavai.cz</a>

Result on the web

—

DOI - Digital Object Identifier

—

Result language

angličtina

Original language name

Fibrous Multilayer Structures for Advanced Applications

Original language description

In extreme climatic conditions, the efficacy of the clothing is defined by its ability to protect against cold temperatures and wind while not compromising on the comfort to the wearer. Thermal insulating properties are crucial to prevent the loss of body heat, maintain a comfortable temperature and protect the body from the chilling effects of air movement. The geometrical structure of the clothing plays a significant role in providing thermal insulation. The materials used in the clothing, such as wool, synthetic fibers, or down feathers, also contribute to thermal insulation by trapping air and reducing heat transfer. While thermal insulation and windproofing are essential aspects of extreme weather clothing, it is important to consider the metabolic activities of the human body which generate or lose body heat. Future designs should aim to better integrate the natural heat generation of the human body to enhance thermal control. By considering the geometry, materials, and energy generated by the body, clothing can carry out its function effectively in extreme conditions. This paper presents the creation of multi-layered fibrous structures composed of different active layers for obtaining multifunctional effects such as thermal insulation, electromagnetic shielding, sound absorption, reflection of IR rays, and antimicrobial resistance. The original ROTIS technology assembling the active layers with the possibility of tuning structures thickness, surface appearance, and density is explained in detail. EMI shielding, noise reduction coefficient (NRC) thermal properties, including thermal conductivity/ thermal resistance, and reflectance spectra of individual layers and whole structure are evaluated experimentally. The effect of structural parameters, thickness, and GSM of final fibrous structures created by ROTIS technology on selected properties are also investigated. The results show that fabric thickness and GSM have a significant positive effect on the performance of the final multilayer structure. It was found that a higher thermal resistance suggested a better sound absorption performance and EMI shielding.

Czech name

—

Czech description

—

Type

O - Miscellaneous

CEP classification

—

OECD FORD branch

20503 - Textiles; including synthetic dyes, colours, fibres (nanoscale materials to be 2.10; biomaterials to be 2.9)

Project

<a href="/en/project/GM21-32510M" target="_blank" >GM21-32510M: Advanced structures for thermal insulation in extreme conditions</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2023

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů