{"id":5457,"date":"2022-08-15T13:18:26","date_gmt":"2022-08-15T13:18:26","guid":{"rendered":"https:\/\/longchangchemical.com\/?p=5457"},"modified":"2022-08-15T13:19:19","modified_gmt":"2022-08-15T13:19:19","slug":"important-applications-of-fluorescent-whitening-agents","status":"publish","type":"post","link":"https:\/\/longchangchemical.com\/fr\/important-applications-of-fluorescent-whitening-agents\/","title":{"rendered":"Le principe de blanchiment et les applications importantes de l'agent de blanchiment fluorescent"},"content":{"rendered":"

Le principe de blanchiment et les applications importantes de l'agent de blanchiment fluorescent<\/strong><\/h1>\n

Dans l'industrie textile, la blancheur de la fibre elle-m\u00eame ne r\u00e9pond souvent pas aux exigences esth\u00e9tiques des gens, en particulier des fibres naturelles, dont la blancheur varie consid\u00e9rablement en raison des diff\u00e9rents environnements et cycles de croissance. Les mat\u00e9riaux blancs ont g\u00e9n\u00e9ralement une l\u00e9g\u00e8re absorption de la lumi\u00e8re bleue de 450 \u00e0 480 nm dans la lumi\u00e8re visible, ce qui entra\u00eene un manque de bleu, les rendant l\u00e9g\u00e8rement jaunes et donnant une impression de vieillesse. C'est pourquoi les gens ont pris diff\u00e9rentes mesures pour rendre les articles plus blancs et plus color\u00e9s. Avant l'apparition de l'agent blanchissant fluorescent, deux m\u00e9thodes principales de blanchiment \u00e9taient g\u00e9n\u00e9ralement utilis\u00e9es.<\/p>\n

1, ajouter la m\u00e9thode de blanchiment au bleu. Cette m\u00e9thode peut avoir un effet blanchissant, mais l'effet est limit\u00e9, et parce que la quantit\u00e9 totale de lumi\u00e8re r\u00e9fl\u00e9chie est r\u00e9duite, les objets s'assombrissent.<\/p>\n

2. M\u00e9thode de blanchiment chimique. Principalement par le biais de la r\u00e9action d'oxydor\u00e9duction et de la d\u00e9coloration du mat\u00e9riau, mais la cellulose causera certains dommages, et le tissu blanchi sera souvent jaune, mais affectera l'effet de blanchiment.<\/p>\n

 <\/p>\n

L'agent de blanchiment fluorescent peut pallier les insuffisances de la m\u00e9thode de blanchiment traditionnelle et pr\u00e9sente une grande sup\u00e9riorit\u00e9. L'agent de blanchiment fluorescent peut absorber la lumi\u00e8re proche de l'ultraviolet \u00e0 haute \u00e9nergie, de sorte que ses mol\u00e9cules passent \u00e0 l'\u00e9tat excit\u00e9, puis les mol\u00e9cules excit\u00e9es passent \u00e0 l'\u00e9tat fondamental \u00e0 basse \u00e9nergie et \u00e9mettent de la fluorescence. La longueur d'onde du rayonnement fluorescent est d'environ 450 nm de lumi\u00e8re bleue, la couleur jaune des articles jaun\u00e2tres peut \u00eatre compens\u00e9e par la lumi\u00e8re bleue r\u00e9fl\u00e9chie par l'agent blanchissant fluorescent, augmentant ainsi la blancheur apparente des articles. L'intensit\u00e9 de la lumi\u00e8re \u00e9mise \u00e9tant sup\u00e9rieure \u00e0 l'intensit\u00e9 de la lumi\u00e8re visible originale projet\u00e9e sur le tissu trait\u00e9, un effet de blanchiment l\u00e9g\u00e8rement chromatique est produit.<\/p>\n

L'utilisation de l'agent de blanchiment fluorescent est tr\u00e8s large, de l'utilisation initiale uniquement pour les textiles, \u00e0 l'utilisation actuelle largement r\u00e9pandue dans le papier, les d\u00e9tergents, les plastiques, les rev\u00eatements, les encres, le cuir et bien d'autres domaines, l'utilisation de l'agent de blanchiment fluorescent et la quantit\u00e9 ne cessent de cro\u00eetre. L'agent de blanchiment fluorescent a une valeur pratique, en plus d'absorber la lumi\u00e8re ultraviolette et d'\u00e9mettre une fluorescence bleu violet et une efficacit\u00e9 de fluorescence \u00e9lev\u00e9e, il doit lui-m\u00eame \u00eatre proche de l'incolore ou l\u00e9g\u00e8rement jaune, avec les caract\u00e9ristiques des colorants ordinaires, une bonne affinit\u00e9 pour les tissus blanchis tels que les fibres, une bonne solubilit\u00e9 ou des propri\u00e9t\u00e9s de dispersion et une meilleure r\u00e9sistance au lavage, \u00e0 la lumi\u00e8re du soleil et aux propri\u00e9t\u00e9s de repassage. Dans les pays du monde entier, la proportion d'azurants fluorescents utilis\u00e9s dans les diff\u00e9rentes industries diff\u00e8re, mais l'utilisation de la proportion de l'ordre est fondamentalement la m\u00eame : c'est-\u00e0-dire, principalement utilis\u00e9 dans les d\u00e9tergents, suivi par le papier, le textile troisi\u00e8me, les plastiques et d'autres domaines de la quantit\u00e9 de plus petite. Les azurants fluorescents peuvent \u00e9galement \u00eatre utilis\u00e9s en combinaison avec des absorbeurs d'UV pour r\u00e9soudre le probl\u00e8me du blanchiment de certains produits polym\u00e8res d\u00fb aux intemp\u00e9ries.<\/p>\n

La r\u00e9action de fluorescence fait r\u00e9f\u00e9rence \u00e0 la substance qui accepte l'irradiation de la lumi\u00e8re UV invisible et se radicalise, puis l'\u00e9nergie de la radicalisation se transforme en processus de lib\u00e9ration de la lumi\u00e8re visible, ce qui est un ph\u00e9nom\u00e8ne de photoluminescence \u00e0 froid. Les fluorescents peuvent produire des r\u00e9actions fluorescentes, mais les \u00e9l\u00e9ments qui produisent des r\u00e9actions fluorescentes ne sont pas seulement des agents fluorescents. Dans la lumi\u00e8re fluorescente, la r\u00e9action fluorescente de la substance n'est pas uniquement celle de l'agent blanchissant fluorescent. Certains produits chimiques quotidiens de haute qualit\u00e9 contenant des ingr\u00e9dients naturels tels que la vitamine E et la glyc\u00e9rine seront \u00e9galement expos\u00e9s \u00e0 la lumi\u00e8re violette de 365 nm pour montrer une r\u00e9action fluorescente. Par cons\u00e9quent, l'irradiation \u00e0 la lumi\u00e8re violette ne peut que prouver la pr\u00e9sence d'une r\u00e9action fluorescente, mais ne permet pas de d\u00e9terminer s'il s'agit d'un agent blanchissant fluorescent.<\/p>\n

Au niveau international, l'agent de blanchiment fluorescent est consid\u00e9r\u00e9 comme un colorant blanc, et chaque structure d'agent de blanchiment fluorescent a son num\u00e9ro d'indice de colorant correspondant. En Chine, les agents de blanchiment fluorescents sont g\u00e9n\u00e9ralement consid\u00e9r\u00e9s comme des auxiliaires de finition fonctionnels importants. Selon le type de structure chimique, les azurants fluorescents utilis\u00e9s dans l'industrie textile comprennent principalement six cat\u00e9gories : 1, le type bis(triazinylamino)stilb\u00e8ne ; 2, le type stilb\u00e8ne biph\u00e9nyle ; 3, le type bis(benzo)azole ; 4, le type stilb\u00e8ne ; 5, le type pyrazoline ; 6, le type coumarine. Lors de l'utilisation d'un agent de blanchiment fluorescent, l'agent de blanchiment fluorescent appropri\u00e9 doit \u00eatre s\u00e9lectionn\u00e9 en fonction de la composition chimique et des propri\u00e9t\u00e9s physiques de la fibre, afin d'obtenir un effet de blanchiment satisfaisant.<\/p>\n

Comme indiqu\u00e9 plus haut, la premi\u00e8re utilisation importante des azurants fluorescents est le lavage. Les d\u00e9tergents textiles sont une n\u00e9cessit\u00e9 dans la vie quotidienne des habitants. Les surfactants et les additifs sont les principaux composants des d\u00e9tergents textiles, qui jouent un r\u00f4le essentiel dans la performance des d\u00e9tergents et l'effet de la propret\u00e9 des v\u00eatements lav\u00e9s. Le traitement de blanchiment fluorescent des tissus des usines d'impression et de teinture est une technologie r\u00e9pandue et commune, mais elle ne permet pas d'obtenir une r\u00e9sistance permanente au lavage, c'est-\u00e0-dire qu'avec l'usure et le lavage, l'agent de blanchiment fluorescent tombera, les v\u00eatements seront vieux, voire jauniront, etc. L'ajout d'une certaine quantit\u00e9 d'agent blanchissant fluorescent dans le d\u00e9tergent avec la bonne vari\u00e9t\u00e9 peut non seulement augmenter la blancheur ou la luminosit\u00e9 du tissu lav\u00e9 et am\u00e9liorer l'effet de lavage, mais aussi am\u00e9liorer l'apparence du d\u00e9tergent. \u00c0 l'heure actuelle, 50% de la consommation mondiale d'azurants fluorescents sont utilis\u00e9s dans l'industrie des d\u00e9tergents. On peut donc dire que les azurants fluorescents sont devenus l'un des principaux additifs indispensables \u00e0 la formulation des d\u00e9tergents textiles. Lors du lavage des v\u00eatements, un d\u00e9tergent est g\u00e9n\u00e9ralement confront\u00e9 \u00e0 diff\u00e9rentes fibres de tissus en m\u00eame temps, telles que le coton, le polyester-coton, le polyester pur, la laine, la soie, la viscose, le nylon, etc. Pour obtenir un meilleur effet de blanchiment et d'\u00e9claircissement sur diff\u00e9rentes fibres en m\u00eame temps, il est n\u00e9cessaire de s\u00e9lectionner des agents de blanchiment fluorescents. Les agents de blanchiment fluorescents de la classe Bis-styryl biph\u00e9nyle et de la classe bis-triazine aminostilb\u00e8ne sont largement utilis\u00e9s dans la structure textile du produit, l'effet de blanchiment des fibres textiles est bon et, plus important encore, il est applicable \u00e0 un large \u00e9ventail de vari\u00e9t\u00e9s de fibres.<\/p>\n

Apr\u00e8s des ann\u00e9es d'exp\u00e9riences scientifiques et d'applications pratiques, il appara\u00eet que l'agent de blanchiment fluorescent est un produit chimique s\u00fbr et inoffensif, qu'il est \u00e9galement difficile de l'absorber dans le corps humain par la peau et qu'il pr\u00e9sente des risques de toxicit\u00e9. Ces substances sont g\u00e9n\u00e9ralement accept\u00e9es au niveau international comme additifs conventionnels pour le papier, les produits en plastique, les textiles, les d\u00e9tergents pour v\u00eatements, etc.<\/p>\n

 <\/p>\n

Produits de la m\u00eame s\u00e9rie<\/strong><\/h2>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Nom du produit<\/td>\nCAS NO.<\/td>\nNom chimique<\/td>\n<\/tr>\n
lcnacure\u00ae TPO<\/span><\/a><\/td>\n75980-60-8<\/td>\nOxyde de diph\u00e9nyl(2,4,6-trim\u00e9thylbenzoyl)phosphine<\/td>\n<\/tr>\n
lcnacure\u00ae TPO-L<\/span><\/a><\/td>\n84434-11-7<\/td>\nPh\u00e9nylphosphinate d'\u00e9thyle (2,4,6-trim\u00e9thylbenzoyle)<\/td>\n<\/tr>\n
lcnacure\u00ae 819<\/span><\/a>\/920<\/td>\n162881-26-7<\/td>\nOxyde de ph\u00e9nylbis(2,4,6-trim\u00e9thylbenzoyl)phosphine<\/td>\n<\/tr>\n
lcnacure\u00ae ITX<\/span><\/a><\/td>\n5495-84-1<\/td>\n2-Isopropylthioxanthone<\/td>\n<\/tr>\n
lcnacure\u00ae DETX<\/span><\/a><\/td>\n82799-44-8<\/td>\n2,4-Di\u00e9thyl-9H-thioxanthen-9-one<\/td>\n<\/tr>\n
lcnacure\u00ae BDK<\/span><\/a>\/651<\/td>\n24650-42-8<\/td>\n2,2-Dim\u00e9thoxy-2-ph\u00e9nylac\u00e9toph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae 907<\/span><\/a><\/td>\n71868-10-5<\/td>\n2-M\u00e9thyl-4\u2032-(m\u00e9thylthio)-2-morpholinopropioph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae 184<\/span><\/a><\/td>\n947-19-3<\/td>\n1-Hydroxycyclohexyl ph\u00e9nylc\u00e9tone<\/td>\n<\/tr>\n
lcnacure\u00aeMBF<\/td>\n15206-55-0<\/td>\nBenzoylformate de m\u00e9thyle<\/td>\n<\/tr>\n
lcnacure\u00ae150<\/td>\n163702-01-0<\/td>\nBenz\u00e8ne, (1-m\u00e9thyl\u00e9th\u00e9nyl)-, homopolym\u00e8re,
\nD\u00e9riv\u00e9s d'ar-(2-hydroxy-2-m\u00e9thyl-1-oxopropyl)<\/td>\n<\/tr>\n
lcnacure\u00ae160<\/span><\/a><\/td>\n71868-15-0<\/td>\nAlpha-hydroxy-c\u00e9tone difonctionnelle<\/td>\n<\/tr>\n
lcnacure\u00ae 1173<\/a><\/span><\/td>\n7473-98-5<\/td>\n2-Hydroxy-2-m\u00e9thylpropioph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00aeEMK<\/td>\n90-93-7<\/td>\n4,4\u2032-Bis(di\u00e9thylamino) benzoph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae PBZ<\/span><\/a><\/td>\n2128-93-0<\/td>\n4-Benzoylbiph\u00e9nyle<\/td>\n<\/tr>\n
lcnacure\u00aeOMBB\/MBB<\/td>\n606-28-0<\/td>\n2-benzoylbenzoate de m\u00e9thyle<\/td>\n<\/tr>\n
lcnacure\u00ae 784<\/a><\/span>\/FMT<\/td>\n125051-32-3<\/td>\nBIS(2,6-DIFLUORO-3-(1-HYDROPYRROL-1-YL)PH\u00c9NYL)TITANOC\u00c8NE<\/td>\n<\/tr>\n
lcnacure\u00ae BP<\/span><\/a><\/td>\n119-61-9<\/td>\nBenzoph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae754<\/td>\n211510-16-6<\/td>\nAcide benz\u00e8ne-ac\u00e9tique, alpha-oxo-, Oxydi-2,1-\u00e9thanediyl ester<\/td>\n<\/tr>\n
lcnacure\u00aeCBP<\/td>\n134-85-0<\/td>\n4-Chlorobenzoph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae MBP<\/span><\/a><\/td>\n134-84-9<\/td>\n4-M\u00e9thylbenzoph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00aeEHA<\/td>\n21245-02-3<\/td>\n4-Dim\u00e9thylaminobenzoate de 2 \u00e9thylhexyle<\/td>\n<\/tr>\n
lcnacure\u00aeDMB<\/td>\n2208-05-1<\/td>\nBenzoate de 2-(Dim\u00e9thylamino)\u00e9thyle<\/td>\n<\/tr>\n
lcnacure\u00aeEDB<\/td>\n10287-53-3<\/td>\n4-dim\u00e9thylaminobenzoate d'\u00e9thyle<\/td>\n<\/tr>\n
lcnacure\u00ae250<\/td>\n344562-80-7<\/td>\n(4-M\u00e9thylph\u00e9nyl) [4-(2-m\u00e9thylpropyl)ph\u00e9nyl] iodonium
\nhexafluorophosphate<\/td>\n<\/tr>\n
lcnacure\u00ae 369<\/span><\/a><\/td>\n119313-12-1<\/td>\n2-Benzyl-2-(dim\u00e9thylamino)-4\u2032-morpholinobutyroph\u00e9none<\/td>\n<\/tr>\n
lcnacure\u00ae 379<\/span><\/a><\/td>\n119344-86-4<\/td>\n1-Butanone, 2-(dim\u00e9thylamino)-2-(4-m\u00e9thylph\u00e9nyl)m\u00e9thyl-1-4-(4-morpholinyl)ph\u00e9nyl-<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

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Le principe de blanchiment et les applications importantes de l'agent de blanchiment fluorescent Dans l'industrie textile, la blancheur de la fibre elle-m\u00eame ne r\u00e9pond souvent pas aux exigences esth\u00e9tiques des gens, en particulier les fibres naturelles, dont la blancheur varie consid\u00e9rablement en raison des diff\u00e9rents environnements de croissance et des cycles de croissance. Les mat\u00e9riaux blancs pr\u00e9sentent g\u00e9n\u00e9ralement une l\u00e9g\u00e8re absorption de la lumi\u00e8re bleue [...]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-5457","post","type-post","status-publish","format-standard","hentry","category-catalysts-chemical-auxiliary-agents"],"yoast_head":"\nThe whitening principle and important applications of fluorescent whitening agent - Longchang Chemical<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/longchangchemical.com\/fr\/important-applications-of-fluorescent-whitening-agents\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The whitening principle and important applications of fluorescent whitening agent - Longchang Chemical\" \/>\n<meta property=\"og:description\" content=\"The whitening principle and important applications of fluorescent whitening agent In the textile industry, the whiteness of the fiber itself often fails to meet the aesthetic requirements of people, especially natural fibers, which vary greatly in whiteness due to different growth environments and growth cycles. 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