izindaba

Manje abantu banezinketho eziningi ekunakekelweni kwesikhumba, izithako zokuvikela isikhumba kuphela zingaphezu kwezinhlobo eziyi-10, kodwa eminye imikhiqizo yokunakekela isikhumba ibonakala sengathi izolimaza isikhumba sethu. Ngakho-ke singakhetha kanjani imikhiqizo yokunakekela isikhumba efanele isikhumba sethu? Ake sixoxe nge-benzophenone-4, isithako esibalulekile emikhiqizweni yokunakekelwa kwesikhumba.

Iyini i-benzophenone-4?

I-Benzophenone-4iyinhlanganisela ye-benzophenone, ebizwa ngokuthi i-BP-4, ifomula yamakhemikhali i-C14H12O6S. Iyimpuphu emhlophe noma ephuzi ekhanyayo ekushiseni kwegumbi futhi ingamunca ngempumelelo ukukhanya kwe-UV okungu-285 kuya ku-325 Im. Njenge-broad spectrum ultraviolet absorber, i-BP-4 inezinzuzo zesilinganiso esiphakeme sokumunca, okungeyona ubuthi, umphumela ongewona we-teratogenic, ukukhanya okuhle kanye nokuzinza kokushisa, njll., i-UV absorber i-BP-4 ingamunca i-UV-A kanye ne-UV-B ngesikhathi esifanayo, iyi-class I sunscreen evunyelwe yi-United States FDA, i-United States kanye namazwe aseYurophu anemvamisa ephezulu yokusetshenziswa, esetshenziswa kakhulu kukhilimu we-sunscreen kanye nezinye izimonyo ze-sunscreen.

I-BP-4 emunca i-UVAyinabo ubuthi, ayishisi, ayiqhumi, kulula ukuyimunca umswakama emoyeni, isebenza kahle kakhulu njenge-acidic aqueous UV umunca, ingamunca kakhulu ukukhanya kwe-UV. Isetshenziswa kabanzi njenge-ultraviolet absorber ye-polymer-based water-based coatings kanye ne-purple peint ukuvimbela i-photocatalytic oxidation ye-polymer-based water kanye ne-purple peint; Iyi-sunscreen enhle yezimonyo kanye ne-UV absorber ukuthuthukisa ukumelana nesimo sezulu kwezindwangu zoboya.

I-Benzophenone isetshenziswa kakhulu ezintweni zasekhaya njengezibuko zelanga, ukupakishwa kokudla, izingubo zokugeza kanye nemikhiqizo yokuhlanza ukuvikela ekuvezweni yi-UV. Ingcolisa amanzi okuphuza futhi isuke ekupakishweni kokudla iye ekudleni. I-Benzophenone isetshenziswa kwezinye izinki zokupakishwa kokudla futhi ingathuthela ekudleni. I-Benzophenone ivela ngokwemvelo ekudleni okuthile (njengamagilebhisi ewayini kanye namagilebhisi e-Muscat) futhi yengezwa kokunye njengesithako sokunambitha.

Emikhiqizweni yokunakekelwa komuntu siqu, i-benzophenone isetshenziswa njengesithuthukisi sephunga noma ukuvimbela imikhiqizo efana nensipho ukuthi ingalahlekelwa yiphunga layo nombala ngaphansi kokukhanya kwe-ultraviolet. I-Benzophenone derivatives efana ne-BP2 kanye ne-oxybenzone (BP3) kanyei-benzophenone-4 (BP-4)zisetshenziswa kuma-sunscreen. I-Oxybenzone isetshenziswa njenge-ultraviolet absorber kanye ne-stabilizer, ikakhulukazi kuma-plastic kanye nama-sunscreen. I-Benzophenone kanye ne-oxybenzone nazo zisetshenziswa kuma-nail polish kanye ne-lip balm.

Iyini i-benzophenone-4 esetshenziselwa ukunakekelwa kwesikhumba?

Isithako esimunca i-UV i-BP-4 sinezinzuzo zokukhanya okuhle kanye nokuzinza kokushisa, futhi sisetshenziswa kabanzi kukhilimu we-sunscreen, ukhilimu, uju, i-lotion, uwoyela kanye nezinye izimonyo ze-sunscreen. Ifaneleka kakhulu kwi-sunscreen, i-lotion, upende, isilinganiso esijwayelekile singu-0.1-0.5%. Isilinganiso esijwayelekile singu-0.2-1.5%.

Isifutho se-UVI-BP-4incibilika kalula emanzini, kanti isixazululo samanzi sine-asidi, ngakho-ke sidinga ukususwa ngesikhathi sokusetshenziswa. Isixazululo i-PH engaphezu kuka-9 sizobangela ukuthi ubude bomkhathi bokumuncwa bunciphe, ukusetshenziswa okuyinhloko kwe-sunscreen yansuku zonke kanye neminye imikhiqizo yokunakekela isikhumba ukuvimbela ukuguga kwesikhumba okubangelwa ukukhanya kwe-ultraviolet.

Iyini i-benzophenone-4 esetshenziselwa ukunakekelwa kwesikhumba?