Kwiminyaka elishumi edlulileyo imfuneko yokuphucula ukhuseleko lwe-UVAyayisanda ngokukhawuleza.
Imitha ye-UV inemiphumo emibi, kuquka ukutshiswa lilanga, ifoto-ukwaluphala kunye nomhlaza wolusu. Ezi ziphumo zinokuthintelwa kuphela ngokukhusela lonke uluhlu lwemitha ye-UV, kuquka ne-UVA.
Kwelinye icala kukwakho nomkhwa wokunciphisa ubungakanani "beekhemikhali" eluswini. Oku kuthetha ukuba i-UV abso isebenza kakuhle kakhulu.ii-rberskufuneka ifumaneke kwimfuneko entsha yokukhuselwa kwe-UV ebanzi.I-Sunsafe-BMTZ（I-Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine yenzelwe ukufezekisa le mfuneko. Ihlala ifaneka, iyanyibilika kwioyile, isebenza kakuhle kwaye igubungela uluhlu lwe-UVB kunye ne-UVA. Ngonyaka ka-2000, abasemagunyeni baseYurophu bongeze i-Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine kuluhlu oluhle lwe-cosmetic UV absorbers.
•I-UVA:Kufuneka amaqela amabini e-ortho-OH ukuze kusetyenziswe amandla ngendlela efanelekileyo ngokusebenzisa ii-intramolecular hydrogen bridges. Ukuze kufunyanwe amandla ngamandla kwi-UVA, ii-para-positions ze-phenyl moieties ezimbini kufuneka zitshintshwe yi-O-alkyl, nto leyo ekhokelela kwi-bis-resorcinyl triazine chromophor.
•I-UVB:Iqela le-phenyl eliseleyo elinamathele kwi-triazine likhokelela ekufunxweni kwe-UVB. Kunokubonakaliswa ukuba ukusebenza okuphezulu "kwe-spectrum epheleleyo" kufezekiswa nge-O-alkyl ekwi-para-position. Ngaphandle kwezinto ezitshintshayo, ii-HPT azinyibiliki phantse kwiioyile ze-cosmetic. Zibonisa iimpawu eziqhelekileyo zeepigment (umz., iindawo eziphezulu zokunyibilika). Ukuze kwandiswe ukunyibilika kwizigaba zeoyile, ulwakhiwo lwesihluzi se-UV lutshintshiwe ngokufanelekileyo.
Iingenelo:
Ukukhusela ilanga ngemitha ebanzi
Ifana kakhulu nezinye izihluzi ze-UV
Uzinzo lwefomula
Ixesha lokuthumela: Feb-18-2022