Kukho iintlobo ezininzii-fluorescent whitening agents, kwaye zifanelekile kwiimveliso ezahlukeneyo zefiber kwaye zineendlela ezininzi zokusetyenziswa kunye needosi.Nangona ubume beekhemikhali kunye nokusebenza kweentlobo ezahlukeneyo ze-fluorescent whitening agents zahlukile, imigaqo yokumhlophe yeemveliso ezifana neentsinga ziyafana.
Ekubeni i-agent emhlophe ye-fluorescent iyimveliso emhlophe, kutheni ukusetyenziswa kakhulu kwilaphu akukwazi ukuwenza mhlophe kwaye kubangele ukuba ubumhlophe buyancipha?I-molecule ye-fluorescent whitening agent iqulethe i-conjugated double bond system, eneplani elungileyo.Esi sakhiwo sikhethekileyo semolekyuli sinokufunxa imitha ye-ultraviolet engabonakaliyo phantsi kokukhanya kwelanga, ngaloo ndlela ibonakalisa kwaye ikhuphe ukukhanya okuluhlaza okwesibhakabhaka, kwaye ekugqibeleni kwilaphu lefiber.Idityaniswe nokukhanya okuphuzi, ikhupha ukukhanya okumhlophe okubonakalayo kwiso lenyama, ukuze kufezekiswe umphumo wokususa umthubi kunye nomhlophe.
Umgaqo oyintloko oqaqambileyo we-optical brighteners yiukukhanya kwamehlo, hayi ukujikwa kwemichiza okuvelisa ukusabela kweekhemikhali.Ngoko ke, ngaphambi kokusebenzisa izikhanyisi zamehlo kwiilaphu, ukuxutywa kweekhemikhali ezifanelekileyo kunokukwenza ukuba ukukhanya okukhanyayo kusebenze.Esona siphumo sikhulu.Umxholo wemitha ye-ultraviolet ekukhanyeni kwelanga ekhanyiswe kwilaphu kunye nokuxinwa kwe-agent emhlophe ye-fluorescent kwilaphu ichazwa ngokomgaqo omhlophe we-agent emhlophe.La manqaku mabini angasentla amisela impembelelo emhlophe ye-agent ekhanyayo ekhanyayo kwilaphu.
Xa umxholo we-UV ekukhanyeni kwelanga kwanele, ukuxinwa kwe-agent emhlophe ye-fluorescent kwilaphu ingaphakathi koluhlu olusebenzayo, kwaye umphumo wobumhlophe wemveliso uyanda njengoko ukuxinwa kwe-agent emhlophe ye-fluorescent inyuka.Xa ugxininiso lwe-agent emhlophe ye-fluorescent ifikelela kumgangatho othile ophezulu kwilaphu, umphumo omhlophe ungcono kakhulu, kwaye ixabiso eliphezulu lobumhlophe elinokuthi imveliso yangoku inokufumaneka.Xa ukugxininiswa kokukhanya kwe-fluorescent kudlula ixabiso elibalulekileyo elinokusetyenziswa yimveliso yelaphu yangoku, ubumhlophe belaphu buya kuba tyheli okanye bubonise nombala wokuqala wokukhanya.Ke ugxininiso olulolona lusetyenziswa kwilaphu lubizwa ngokuba yindawo etyheli yesikhanyiso.Ke kutheni ubumhlophe buncipha xa ubungakanani bokukhanya obusetyenziswa kwilaphu bukhulu kakhulu?
Xa ukugxininiswa kokukhanya kwe-fluorescent kwimveliso yelaphu kufikelela kwindawo etyheli ye-brightener, ubukhulu bokukhanya okuluhlaza okwesibhakabhaka kubonakaliswe yi-brightener kunye nokukhanya okutyheli kwilaphu kuyancedisana, kwaye umphumo oqaqambileyo ungcono kakhulu. ngeli xesha.Kwaye xa ugxininiso ludlula indawo etyheli yesikhanyiso, ukukhanya okuluhlaza okwesibhakabhaka-violet okubonakalisiweyo kudlula ukukhanya okutyheli kwelaphu, okukhokelela ekukhanyeni okuluhlaza okwesibhakabhaka-violet, kwaye into yokugqibela iliso eliyibonayo kukuncipha okubonakalayo kobumhlophe okanye nokuba. tyheli.
Ngoko ke, ngaphambi kokuba ungeze isikhanyiso se-fluorescent kwimveliso, iisampulu eziqhubekayo kufuneka zithathwe ukuvavanya indawo ye-yellowing yohlobo lwangoku lokukhanyisa kwiingubo kunye nezinye iimveliso.Ukunyenyisa eyona mali ilungileyo yokongeza ukunyusa isiphumo sokwenza mhlophe.
Ixesha lokuposa: Nov-10-2021