Skip to Main content Skip to Navigation
Theses

Étude et développement de nouveaux medias fibreux à fibres ultrafines : application à la filtration de l’air

Abstract : The goal of the thesis is the study and development of fibrous media with ultrafine fibers through the use of nano-meltblown technology as well as the use of bicomponent islands-in-sea fibers. This approach involves dual work, both on obtaining ultrafine fibers and on the homogeneity of fibrous media. Indeed, for each technology, the elaboration of a fibrous media induces heterogeneities. The origin of this heterogeneity is multiple: distribution of filament diameters, local variation in thickness, packing density or basis weight. This led us to carry out a study and a modeling of the filtration performance in order to better understand the impact of ultrafine fibers and the heterogeneity of fibrous media in air filtration. Most of filtration models (permeability and efficiency) consider an ideal fibrous media with monodisperse fibers and a homogeneous distribution of matter within the fibrous media. In reality, these conditions are rarely met, so understanding the influence of different heterogeneities on filtration performance can be an important issue to improve the performance of filtering media. The modeling of this heterogeneity is based on the correction of the models of effectiveness of the literature from the experimental data
Complete list of metadatas

Cited literature [122 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-01663073
Contributor : Abes Star :  Contact
Submitted on : Wednesday, December 13, 2017 - 4:47:22 PM
Last modification on : Thursday, December 26, 2019 - 2:52:05 PM

File

DDOC_T_2017_0021_RUNGIAH.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-01663073, version 1

Collections

Citation

Selven Rungiah. Étude et développement de nouveaux medias fibreux à fibres ultrafines : application à la filtration de l’air. Génie des procédés. Université de Lorraine, 2017. Français. ⟨NNT : 2017LORR0021⟩. ⟨tel-01663073⟩

Share

Metrics

Record views

253

Files downloads

773