Fluorescent whitening tus neeg saib xyuas yog ib hom organic compound uas tuaj yeem txhim kho cov xim ntawm cov ntaub fiber ntau thiab ntawv, tseem hu ua optical whitening agent thiab fluorescent whitening agent.Fabrics, thiab lwm yam. feem ntau yog daj vim muaj cov xim tsis huv, thiab cov tshuaj bleaching tau siv los decolorize lawv yav dhau los.Cov txheej txheem ntawm kev ntxiv cov tshuaj ntxuav hniav dawb rau cov khoom tam sim no tau txais kev pom zoo, thiab nws txoj haujlwm yog los hloov cov hluav taws xob tsis pom kev ultraviolet absorbed los ntawm cov khoom mus rau hauv xiav-violet fluorescent hluav taws xob, uas yog ntxiv rau cov thawj lub teeb daj daj thiab dhau los ua lub teeb dawb, uas. txhim kho cov khoom muaj peev xwm tiv taus tshav ntuj.ntawm dawb.Brighteners tau siv dav hauv textiles, ntawv, ntxhua khaub ncaws, xab npum, roj hmab, yas, pigments thiab xim.
Brighteners txhua tus muaj cov txheej txheem cyclic conjugated hauv cov qauv tshuaj, xws li: stilbene derivatives, phenylpyrazoline derivatives, benzothiazole derivatives, benzimidazole derivatives, coumarin derivatives thiab Naphthalimide derivatives, thiab lwm yam, ntawm cov stilbene derivatives loj tshaj plaws.Siv txoj hauv kev thiab cov khoom los faib cov ci ci tuaj yeem muab faib ua plaub hom:
A series hais txog cov tshuaj fluorescent whitening agents uas tuaj yeem tsim cov cations hauv cov kua dej.Haum rau whitening ntawm acrylic fibers.B series optical brighteners yog tsim rau brightening cellulose fibers.C series hais txog ib hom fluorescent whitening tus neeg sawv cev dispersed nyob rau hauv dye da dej nyob rau hauv lub xub ntiag ntawm dispersant, haum rau whitening polyester thiab lwm yam hydrophobic fibers.D series hais txog fluorescent whitening tus neeg sawv cev haum rau cov protein fiber ntau thiab nylon.Raws li cov qauv tshuaj, cov tshuaj ntxuav hniav dawb tuaj yeem muab faib ua tsib pawg: ① stilbene hom, siv hauv cov paj rwb fiber ntau thiab qee cov hluavtaws fibers, papermaking, xab npum ua thiab lwm yam lag luam, nrog xiav fluorescence;② coumarin hom, nrog tshuaj tsw qab Cov qauv yooj yim ntawm taum ketone, siv hauv polyvinyl chloride plastics, thiab lwm yam, muaj zog xiav fluorescence;③ pyrazoline hom, siv rau wool, polyamide, acrylic fibers thiab lwm yam fibers, nrog ntsuab fluorescence;④ benzoxazine hom, nrog rau acrylic fibers thiab lwm yam yas xws li polyvinyl chloride thiab polystyrene, nws muaj liab fluorescence;⑤ phthalimide hom, rau polyester, acrylic, nylon thiab lwm yam fibers, nrog xiav fluorescence.Cov saum toj no yog kev faib cov tshuaj ntxuav hniav dawb.Thaum cov neeg siv khoom xaiv cov tshuaj pleev xim dawb, lawv yuav tsum xub nkag siab txog lawv tus kheej cov khoom, kom lawv tuaj yeem xaiv tus neeg saib xyuas kom zoo.Thiab cov neeg siv khoom yuav tsum paub tias thaum siv cov tshuaj ntxuav hniav dawb, cov tshuaj ntxuav hniav dawb tsuas yog kho qhov muag kom pom tseeb thiab cov xim ntxiv, thiab tsis tuaj yeem hloov tshuaj bleaching.Yog li ntawd, cov xim muaj xim raug kho ncaj qha nrog tus neeg sawv cev ua kom dawb tsis muaj tshuaj dawb, thiab cov nyhuv whitening tsis tuaj yeem tau txais hauv paus.Thiab tus neeg sawv cev ua kom dawb tsis yog whitening ntau dua, tab sis muaj qee yam saturation concentration.Tshaj ib qho kev txwv tsis pub dhau tus nqi, tsis tsuas yog tsis muaj cov nyhuv whitening, tab sis kuj yellowing.
Post lub sij hawm: Jan-24-2022