Zvinhu zvichena zvinowanzotora zvishoma chiedza chebhuruu (450-480nm) muchiedza chinooneka (wavelength range 400-800nm), zvichikonzera kusakwana kweruvara rwebhuruu, zvichiita kuti ive yero zvishoma, uye kupa vanhu pfungwa dzekare uye dzisina kuchena nekuda kwekuchena kwakakanganisika.Kuti izvi zviitike, vanhu vakatora matanho akasiyana ekuti zvinhu zvichene nekupenya.
Kune nzira mbiri dzinowanzo shandiswa, imwe iGarland whitening, ndiko kuti, kuwedzera chidimbu cheblue pigment (senge ultramarine) kune yakambovhenekerwa chinhu, ichivhara yellowish color ye substrate nekuwedzera kuratidzwa kweblue light part. , zvichiita kuti chiite chichena.Kunyange zvazvo garland inogona kuchena, imwe ishoma, uye imwe yacho ndeyokuti nekuda kwekuderedzwa kwehuwandu hwehuwandu hwechiedza chakaratidzwa, kupenya kunoderedzwa, uye ruvara rwechinhu chacho rinova rakasviba.Imwe nzira ikemikari bleaching, iyo inopera ruvara ne redox reaction pamusoro pechinhu chine pigment, saka zvichange zvisingadzivisiki kukuvadza cellulose, uye chinhu mushure me bleaching ine yero musoro, iyo inokanganisa maonero ekuona.Fluorescent whitening agents zvakawanikwa muna 1920s zvakagadzirirwa kukanganisa kwenzira dziri pamusoro uye dzakaratidza zvakanakira zvisingaenzaniswi.
Fluorescent whitening agent ndeye organic compound iyo inogona kutora ultraviolet chiedza uye kunakidza bhuruu kana bhuruu-violet fluorescence.Zvinhu zvine fluorescent whitening agent adsorbed zvinogona kuratidza mwenje unooneka wakavhenekerwa pachinhu, uye zvakare Iyo yakanyura isingaonekwe ultraviolet mwenje (wavelength iri 300-400nm) inoshandurwa kuita yebhuruu kana yebhuruu-violet inooneka mwenje uye yakaburitswa, uye yebhuruu neyero ndiwo anowirirana mavara. kune mumwe nemumwe, nokudaro kubvisa yero mune matrix yechinyorwa, ichiita chena uye yakanaka.Kune rumwe rutivi, kubuda kwechinhu kuchiedza kunowedzera, uye kusimba kwechiedza chinobudiswa kunodarika kusimba kwechiedza chepakutanga chinooneka chinoratidzwa pachinhu chichagadziriswa.Nokudaro, kuchena kwechinhu chinoonekwa nemaziso evanhu kunowedzera, nokudaro kuzadzisa chinangwa chekuchenesa.
Fluorescent whitening agents ikirasi yema organic compounds ane yakakosha chimiro chine conjugated double bond uye yakanaka planarity.Pasi pechiedza chezuva, inogona kutora ultraviolet rays isingaonekwe neziso rakashama (wavelength is 300 ~ 400nm), inonakidza mamorekuru, uye yozodzokera kumamiriro epasi, chikamu cheiyo ultraviolet simba inopera, yozoshandurwa kuita blue-violet light. ine simba rakaderera (wavelength 420 ~ 480nm) yakabudiswa.Nenzira iyi, chiyero chekuratidzira kwechiedza cheblue-violet pa substrate chinogona kuwedzerwa, nokudaro kubvisa manzwiro eyero anokonzerwa nehuwandu hweyero chiedza chekuratidzira pachinhu chekutanga, uye nekuona kuburitsa chena uye inopenya.
Kucheneruka kwefluorescent whitening agent inongopenya inopenya uye inopindirana neruvara, uye haigone kutsiva kemikari bleaching kupa jira rechokwadi "chena".Nokudaro, kana jira rine ruvara rwakasviba richibatwa ne fluorescent whitening agent chete pasina bleaching , kuchena kunogutsa hakugone kuwanikwa.Iyo general chemical bleaching agent ioxidant yakasimba.Mushure mekunge iyo fiber yakasvibiswa, nyama yayo ichakuvadzwa kune imwe nhanho, nepo kuchena kweiyo fluorescent whitening agent ndeye optical athari, saka haizokonzere kukuvadza kune fiber tishu.Uyezve, iyo fluorescent whitening agent ine ruvara rwakapfava uye rwunopenya rwefluorescent muchiedza chezuva, uye nekuti hapana ultraviolet mwenje pasi pechiedza cheincandescent, haitaridzike ichena uye ichipenya sepachiedza chezuva.Kutsanya kwechiedza che fluorescent whitening agents kwakasiyana kune dzakasiyana siyana, nekuti pasi pechiito che ultraviolet mwenje, mamorekuru eiyo whitening agent achaparadzwa zvishoma nezvishoma.Naizvozvo, zvigadzirwa zvinorapwa nefluorescent whitening agents zvinogara zvichidzikira mukuchena mushure mekusangana kwenguva refu nechiedza chezuva.Kazhinji kutaura, kukurumidza kukurumidza kwepolyester inopenya zviri nani, iyo naironi uye acrylic ndeyepakati, uye iyo yemvere dzemakwai nesirika yakaderera.
Kumhanya kwechiedza uye fluorescent mhedzisiro inoenderana neiyo molecular chimiro chefluorescent whitening agent, pamwe nehunhu uye chinzvimbo chezvinotsiva, senge kuunzwa kweN, O, uye hydroxyl, amino, alkyl, uye alkoxy mapoka mune heterocyclic makomisheni. , izvo zvinogona kubatsira.Inoshandiswa kuvandudza fluorescence mhedzisiro, nepo nitro boka uye azo boka kuderedza kana kubvisa iyo fluorescence mhedzisiro uye kunatsiridza kukurumidza kukurumidza.
Nguva yekutumira: Jan-14-2022