Nyob rau hauv lub tshav pob ntawm functional additives, kho qhov muag brighteners, vim hais tias ntawm lawv cov cim whitening mechanism thiab ntau yam khoom cov ntaub ntawv, yuav tsum tau sib txawv nyob rau hauv ntau qhov ntev kom meej nkag siab txog lawv cov yam ntxwv thiab muaj feem xyuam. Cov kev sib txawv no feem ntau tshwm sim hauv lawv cov txheej txheem ntawm kev ua, cov qauv molecular, daim ntawv lub cev, cov yam ntxwv ntawm kev ua tau zoo, thiab cov xwm txheej siv tau, muab lub hauv paus rau kev xaiv hauv kev lag luam sib txawv thiab cov txheej txheem txheej txheem.
Thawj qhov sib txawv yog nyob rau hauv qhov sib txawv hauv lawv cov txheej txheem ntawm kev ua piv rau cov txheej txheem tshuaj dawb. Cov tshuaj bleaching ib txwm tso siab rau cov tshuaj tiv thaiv redox los rhuav tshem cov xim molecules, ua rau cov xim tsis zoo, tab sis qhov no feem ntau tuaj nrog kev pheej hmoo ntawm kev txo qis zog los yog hloov xim. Optical brighteners, ntawm qhov tod tes, yog nyob ntawm cov txheej txheem photophysical. Los ntawm absorbing ultraviolet lub teeb thiab hloov mus rau xiav -violet pom lub teeb, lawv them rau qhov tsis txaus ntawm cov ntaub ntawv nyob rau hauv xiav -violet cheeb tsam ntawm lub pom spectrum, yog li txhim kho whiteness thaum tuav tus thawj qauv thiab kev ua tau zoo ntawm lub substrate. Qhov no tsis yog -kev puas tsuaj kho qhov muag mechanism ua rau lawv muaj txiaj ntsig zoo nyob rau hauv siab -kawg textiles, precision plastics, thiab khoom noj khoom haus.
Nyob rau hauv cov nqe lus ntawm cov qauv molecular, ntau hom optical brighteners pom qhov sib txawv tseem ceeb. Stilbene derivatives muaj qhov sib txuas ntev dua thiab ua haujlwm siab fluorescence, ua rau lawv haum rau cov khoom siv hluavtaws thiab dav dav - cov hom phiaj yas. Coumarin derivatives, vim lawv luv luv excitation wavelength los ntawm benzopyranone skeleton, yog ntau haum rau lub teeb -xim lossis pob tshab substrates. Pyrazoline derivatives yog nruj dua thiab muaj lub teeb ci zoo, feem ntau siv nyob rau sab nraum zoov huab cua- cov khoom tiv thaiv. Benzooxazole thiab benzotriazole derivatives muaj cov qauv heterocyclic, nthuav tawm thermal stability thiab kev tsiv teb tsaws tsis kam, thiab feem ntau yog siv rau hauv kev ua haujlwm kub -. Cov qauv sib txawv ncaj qha txiav txim siab qhov nqus plua plav, xim fluorescence, thiab kev kam rau ib puag ncig.
Lub cev daim ntawv kuj yog ib qho tseem ceeb sib txawv. Cov khoom lag luam muaj feem ntau muaj nyob rau hauv peb hom: hmoov, granules, thiab kua dispersions. Cov hmoov ua kom lub cev hnyav tab sis yuav tsum tau ceev faj tswj cov plua plav; granules, tom qab granulation los yog txheej, muaj zoo flowability thiab plua plav tswj, ua rau lawv haum rau automated ntau lawm kab; Cov kua dispersions pab txhawb kev sib xyaw kom nrawm thiab sib xyaw ua ke hauv cov tshuab aqueous lossis hnyav, haum rau cov txheej txheem txuas ntxiv xws li txheej txheej thiab papermaking. Kev xaiv ntawm daim ntawv feem ntau yog nyob ntawm cov khoom siv, kev pub mis, thiab kev nyab xeeb ntawm ib puag ncig.
Qhov sib txawv ntawm kev ua tau zoo yog xav txog hauv cov ntsuas xws li fluorescence efficiency, lightfastness, tshav kub tsis kam, migration resistance, thiab compatibility. Piv txwv li, brighteners siv nyob rau hauv cov yeeb yaj duab sab nraum zoov yuav tsum muaj lightfastness siab heev thiab thermal stability, thaum cov uas siv nyob rau hauv cov zaub mov ntim zaj duab xis yuav tsum nruj tswj kev tsiv teb tsaws thiab toxicity. Qhov sib txawv qhov tseem ceeb ntawm kev ua tau zoo rau cov ntawv thov sib txawv txiav txim siab seb puas yuav siv cov khoom tshwj xeeb lossis dav dav - cov khoom siv hauv cov qauv.
Qhov sib txawv ntawm cov xwm txheej cuam tshuam ntxiv qhia txog ntau tus nqi ntawm optical brighteners. Kev lag luam textile tsom rau kev sib raug zoo nrog fibers thiab kev ruaj ntseg tom qab ntau yam ntxuav; papermaking qhia txog qhov sib txawv ntawm cov ntaub so ntswg thiab txhim kho kev luam ntawv; Kev ua cov yas tsom rau kev ua haujlwm khaws cia nyob rau hauv siab -kub molten tej yam kev mob; thiab cov coatings thiab inks xav tau kev sib koom ua ke zoo nrog zaj duab xis- tsim cov tshuaj thiab xim sib xws.
Yog li ntawd, optical brighteners muaj ntau qhov sib txawv hauv cov txheej txheem, qauv, morphology, kev ua tau zoo, thiab kev siv. Cov kev sib txawv no tsis yog lub hauv paus rau kev segmentation thev naus laus zis nkaus xwb tab sis kuj yog qhov yuav tsum tau ua ua ntej kom ua tiav qhov sib txuam thiab siv tau zoo. Kev nthuav qhia qhov sib txawv no pab ua qhov kev txiav txim siab xaiv cov khoom siv tshawb fawb thiab tsim nyog rau kev xav tau kev lag luam nyuaj, ua kom lawv cov txiaj ntsig zoo tshaj plaws.