izindaba

Manje abantu banezinketho eziningi ekunakekelweni kwesikhumba, izithako zokuvikela ilanga zingaphezu kwezinhlobo eziyi-10, kodwa eminye imikhiqizo yokunakekelwa kwesikhumba ibonakala sengathi ukunakekelwa kwesikhumba empeleni kuzolimaza isikhumba sethu. Ngakho-ke sikhetha kanjani imikhiqizo yokunakekelwa kwesikhumba efanele yesikhumba sethu? Ake sikhulume nge-benzophenone-4, isithako esibalulekile emikhiqizweni yokunakekelwa kwesikhumba.

Iyini i-benzophenone-4?

I-Benzophenone-4iyinhlanganisela ye-benzophenone, ebizwa ngokuthi i-BP-4, ifomula yamakhemikhali C14H12O6S. Kuyimpushana emhlophe noma ephuzi ekhanyayo emazingeni okushisa asekamelweni futhi ingamunca ngempumelelo ukukhanya kwe-UV okungama-285 kuya ku-325 Im. Njengesithathisi esibanzi se-ultraviolet, i-BP-4 inezinzuzo zokumunca okuphezulu, umphumela ongenabuthi, ongewona we-teratogenic, ukukhanya okuhle nokuzinza kokushisa, njll., i-UV absorber BP-4 ingakwazi ukumunca i-UV-A ne-UV-B ngesikhathi esifanayo, i-class I sunscreen egunyazwe yi-United States FDA, i-United States kanye namazwe aseYurophu anemvamisa ephezulu yokusetshenziswa, ikakhulukazi esetshenziswa kukhilimu we-sunscreen nezinye izimonyo zokuvikela ilanga.

I-BP-4 emunca i-Uvayinabo ubuthi, ayishi, ayiqhumi, kulula ukumunca umswakama emoyeni, iwukusebenza okuhle kakhulu kokumunca okune-asidi okune-UV okune-aqueous, kungakwazi ukumunca ukukhanya kwe-UV. Isetshenziswa kabanzi njenge-absorber ye-ultraviolet yezingubo ze-polymer ezisekelwe emanzini kanye nopende onsomi ukuvimbela i-oxidation ye-photocatalytic yezingubo ze-polymer ezisekelwe emanzini kanye nopende onsomi; Kuyi-sunscreen enhle yezimonyo kanye nesibambisi se-UV sokuthuthukisa ukumelana nesimo sezulu sezindwangu zoboya.

I-Benzophenone isetshenziswa kakhulu ezintweni zasendlini njengezibuko zelanga, ukupakisha ukudla, ilondolo kanye nemikhiqizo yokuhlanza ukuvikela ekuchayekeni kwe-UV. Ingangcolisa amanzi okuphuza futhi isuke ephaketheni lokudla iye ekudleni. I-Benzophenone isetshenziswa kwezinye iziyinki zokupakisha ukudla futhi ingase ithuthele ekudleni. I-Benzophenone yenzeka ngokwemvelo ekudleni okuthile (okufana namagilebhisi ewayini kanye namagilebhisi e-Muscat) futhi yengezwa kwezinye njenge-agent yokunambitha.

Emikhiqizweni yokunakekelwa komuntu siqu, i-benzophenone isetshenziswa njengesithuthukisi sephunga noma ukuvimbela imikhiqizo efana nezinsipho ekulahlekelweni yiphunga nombala ngaphansi kokukhanya kwe-ultraviolet. Okuphuma ku-Benzophenone njenge-BP2 ne-oxybenzone (BP3) kanyei-benzophenone-4 (BP-4)asetshenziswa kuma-sunscreens. I-Oxybenzone isetshenziswa njengesibambisi se-ultraviolet nokuzinza, ikakhulukazi kumapulasitiki kanye nezikhilimu zelanga. I-Benzophenone ne-oxybenzone nazo zisetshenziswa ekwenzeni i-nail polish kanye ne-lip balm.

Iyini i-benzophenone-4 esetshenziselwa ukunakekelwa kwesikhumba?

I-Uv absorbent BP-4 inezinzuzo zokukhanya okuhle nokuzinza kokushisa, futhi isetshenziswa kakhulu kukhilimu ovikela ilanga, ukhilimu, uju, amafutha okugcoba, amafutha nezinye izimonyo zokuvikela ilanga. Ikakhulukazi efanelekayo ilanga, lotion, upende, umthamo jikelele 0.1-0.5%. Umthamo ojwayelekile ngu-0.2-1.5%.

I-Absorber ye-UvBP-4incibilika kalula emanzini, futhi isisombululo esinamanzi sine-asidi, ngakho-ke sidinga ukungathathi hlangothi ngesikhathi sokusetshenziswa. Isixazululo esingu-PH esingaphezu kuka-9 sizobangela ubude begagasi bokumunca ukuba bube buncane, ukusetshenziswa okuyinhloko kwe-sunscreen yansuku zonke kanye neminye imikhiqizo yokunakekelwa kwesikhumba ukuvimbela ukuguga kwesikhumba okubangelwa ukukhanya kwe-ultraviolet.

Iyini i-benzophenone-4 esetshenziselwa ukunakekelwa kwesikhumba?