Formaldehyde release from chekiang lambskin, characteristic parameter determination and influencing factors / Hao Dong-Yan in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 5 (09-10/2019)  

[article]  inJOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC) > Vol. 103, N° 5 (09-10/2019) . - p. 260-267 Titre : Formaldehyde release from chekiang lambskin, characteristic parameter determination and influencing factors Type de document : texte imprimé Auteurs : Hao Dong-Yan, Auteur ; Wang Xue-Chuan, Auteur ; Lu Wei-Na, Auteur ; Li Ji, Auteur Année de publication : 2019 Article en page(s) : p. 260-267 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Coefficient de diffusion Un coefficient de diffusion est une grandeur caractéristique du phénomène de diffusion de la matière. Le coefficient de diffusion mesure le rapport entre le flux molaire dû à la diffusion moléculaire, et le gradient de concentration de l'espèce chimique considérée (ou, plus généralement, de la variable d'effort entraînant cette diffusion), comme formulé par la loi de Fick. Cuirs et peaux de moutons Distillation Emissivité En transfert radiatif, l'émissivité correspond au flux radiatif du rayonnement thermique émis par un élément de surface à température donnée, rapporté à la valeur de référence qu’est le flux émis par un corps noir à cette même température. Cette dernière valeur étant la valeur maximale possible, l'émissivité est un nombre inférieur ou égal à l'unité. (widipedia) Extraction (chimie) Fourrures -- Teneur en formaldehyde Index. décimale : 675 Technologie du cuir et de la fourrure Résumé : VOC emissions may cause poor indoor (vehicle cabins included) air quality (IAQ). Recent studies have been conducted on the characteristics of volatile organic compounds (VOCs) emissions, most of them are focused on wood-based building materials, fur or fur imitations are scarcely mentioned. However, formaldehyde or formaldehyde-containing chemicals are often used in the production of fur, resulting in a certain amount of formaldehyde remaining in the finished product. This paper takes formaldehyde (FA) as an example to study its diffusion in fur. In order to understand and control the behaviour of the formaldehyde emission characteristics. Based on detailed mass transfer analysis of the emission process in a ventilated chamber, this paper measured the three emission characteristic parameters, i.e., the initial emittable concentration (C0), the diffusion coefficient (Dm) and the partition coefficient (K). The influence of different factors on the release parameters was also studied, as well as the time required for the emission of formaldehyde under different ventilation rates ; we also compared the formaldehyde results of different test methods. The results showed that both Dm and C, increased as temperature rose, but Co increase is significant. With the increase of relative humidity, Dm decreased but Co increased. In addition, the prediction model agrees well with the experimental data. The greater the ventilation rate, the faster the improvement of air quality standards in the cabin; The initial concentration was less than 43% of the formaldehyde content obtained through the extraction method and less than 4.6% of the formaldehyde content obtained by the distillation method. Note de contenu : - EXPERIMENTAL PROCEDURE : Materials - Equipment and instruments - Formaldehyde emission test of fur - Extraction method - Distillation method - Mass release model - RESULTS AND DISCUSSION : Effects of different temperatures on the release parameters - The effect of different relative humidity levels on characteristic parameters - Comparison of diffusion coefficient Dm between fur and other materials in the literature - Comparison of release time of formaldehyde in the environmental cabin under different ventilation conditions - Comparison of the initial concentration of fur formaldehyde with the concentration measured by distillation and extraction method - Sensitivity analysis En ligne : https://drive.google.com/file/d/1yku0zJdX5XxuEJ6e7E33dfsg429hja_r/view?usp=drive [...] Format de la ressource électronique : Pdf Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=33001 [article]

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