Methods for characterization and evaluation of self-cleaning textiles

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24410%2F19%3A00007553" target="_blank" >RIV/46747885:24410/19:00007553 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Methods for characterization and evaluation of self-cleaning textiles

Popis výsledku v původním jazyce

Self-cleaning textiles are the ones which clean themselves without any substantial physical assistance. These textiles can be divided into three categories, namely, physical, chemical, and biological self cleanings. The physical self-cleaning refers to lotus effect that can be defined as the cleaning of lotus leaves due to the rolling of rain droplets on them. The lotus leaves exhibit this characteristic due to the presence of hierarchical roughness structure, i.e., micro-roughness covered with hydrophobic nano roughness. In various studies, textiles have been functionalized with different nanostructures to generate roughness on fibers which on modification with hydrophobic compounds exhibited physical self-cleaning (lotus effect). The chemical self-cleaning means the degradation of color stains or discoloration of solutions in contact with fabric. For this, the fabric is functionalized with photocatalysts which produce hydroxyl radicals on ultraviolet (UV) light activation. This radical is highly oxidative and non-selective with high-redox potential (E0 = 3.06 V). Therefore, it degrades stains and other organic species. Roughness-induced superhydrophobicity has been known since the pioneering studies by Wenzel and Cassie–Baxter in the 1930– 40s. The advances in the past decade of the technology enabling manufacturing of microstructured surfaces increased the attention to superhydrophobicity and its application. New potential applications of the micro/nanostructured surfaces for the Lotus effect and superhydrophobicity have been suggested and investigated, including the applications for energy and environment-friendly manufacturing, underwater applications, such as antifouling, optical systems and others.

Název v anglickém jazyce

Methods for characterization and evaluation of self-cleaning textiles

Popis výsledku anglicky

Self-cleaning textiles are the ones which clean themselves without any substantial physical assistance. These textiles can be divided into three categories, namely, physical, chemical, and biological self cleanings. The physical self-cleaning refers to lotus effect that can be defined as the cleaning of lotus leaves due to the rolling of rain droplets on them. The lotus leaves exhibit this characteristic due to the presence of hierarchical roughness structure, i.e., micro-roughness covered with hydrophobic nano roughness. In various studies, textiles have been functionalized with different nanostructures to generate roughness on fibers which on modification with hydrophobic compounds exhibited physical self-cleaning (lotus effect). The chemical self-cleaning means the degradation of color stains or discoloration of solutions in contact with fabric. For this, the fabric is functionalized with photocatalysts which produce hydroxyl radicals on ultraviolet (UV) light activation. This radical is highly oxidative and non-selective with high-redox potential (E0 = 3.06 V). Therefore, it degrades stains and other organic species. Roughness-induced superhydrophobicity has been known since the pioneering studies by Wenzel and Cassie–Baxter in the 1930– 40s. The advances in the past decade of the technology enabling manufacturing of microstructured surfaces increased the attention to superhydrophobicity and its application. New potential applications of the micro/nanostructured surfaces for the Lotus effect and superhydrophobicity have been suggested and investigated, including the applications for energy and environment-friendly manufacturing, underwater applications, such as antifouling, optical systems and others.

Druh

C - Kapitola v odborné knize

CEP obor

—

OECD FORD obor

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

Projekt

<a href="/cs/project/EF16_019%2F0000843" target="_blank" >EF16_019/0000843: Hybridní materiály pro hierarchické struktury</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název knihy nebo sborníku

Recent trends in fibrous material science

ISBN

978-80-7494-493-2

Počet stran výsledku

27

Strana od-do

411-437

Počet stran knihy

485

Název nakladatele

Technical University of Liberec

Místo vydání

Liberec

Kód UT WoS kapitoly

—