Isakhiwo samangqamuzanaAma-UV atholakalayoImvamisa iqukethe izibopho eziphindwe kabili ezihlanganisiwe noma izindandatho ze-aromatic, ezingadonsa imisebe ye-ultraviolet yama-wavelength athile (ikakhulukazi i-UVA ne-UVB).
Lapho imisebe ye-ultraviolet icela ama-molecule amunwe, ama-elektroni eguquko le-molecule evela emhlabathini ayisa esimweni esijabulisayo, amunca amandla emisebe ye-ultraviolet.
Ngemuva kokuthola ukukhanya kwe-ultraviolet, i-molecule isesimweni esijabulisayo esinamandla amakhulu. Ukuze ubuyele esimweni esizinzile somhlaba, ama-molecule amunca azokhipha amandla ngalezi zindlela ezilandelayo:
I-①Non radiative transiction: Guqula amandla abe amandla okushisa bese uyikhipha endaweni ezungezile.
② Flluescence noma i-phosphorescence: Ingxenye yamandla ingadedelwa ngesimo sokukhanya okubonakalayo (akuvamile).
Ngokuthola imisebe ye-ultraviolet futhi uziguqula ibe amandla okushisa, abathintekayo e-UV banciphisa ukulimala okuqondile kwemisebe ye-ultraviolet ngezinto zokwakha (njengamapulasitiki) noma isikhumba.
Emikhiqizweni ye-sunscreen, ama-UV afusha angavimba imisebe ye-UV ekungeniseni isikhumba futhi anciphise ingozi yokushiswa yilanga, isithombe kanye nomdlavuza wesikhumba.
Abasizi bethu be-UV balungele ama-polymers, ukumboza kanye nezimonyo. Uma udinga imikhiqizo, sicela ukhululeke ukuxhumana nathi, sizophendula kungakapheli amahora angama-48.
Isikhathi sePosi: Feb-25-2025