Njengoba isidingo sokuvikela ilanga okuphumelelayo siqhubeka sikhula, imboni yezimonyo iye yabona inguquko ephawulekayo ezithakweni ezisetshenziswa emakhakheni okuvikela ilanga. Lesi sihloko sihlola uhambo lokuthuthuka kwesithako kumakhemikhali okuvikela ilanga, egqamisa umthelela oguqukayo emikhiqizweni yesimanje yokuvikela ilanga.
Ukuhlola Izithako Zakuqala:
Ezigabeni zokuqala zokwakhiwa kokuvikela ilanga, izithako zemvelo ezifana nezitshalo zezitshalo, amaminerali, namafutha zazivame ukusetshenziselwa ukuhlinzeka ngokuvikelwa elangeni okulinganiselwe. Nakuba lezi zithako zinikeza izinga elithile lokuvinjwa kwemisebe ye-UV, ukusebenza kwazo kwakunesizotha futhi kungenayo imiphumela ehlala isikhathi eside eyayifunwa.
Ukwethulwa kwezihlungi ze-Organic:
Impumelelo ekhiqizweni yokuvikela ilanga ngamakhemikhali iqhamuke nokwethulwa kwezihlungi zemvelo, ezaziwa nangokuthi ama-UV absorbers. Maphakathi nekhulu lama-20, ososayensi baqala ukuhlola izakhi ezikwazi ukumunca imisebe ye-UV. I-Benzyl salicylate ivele njengengqalabutho kulo mkhakha, ihlinzeka ngokuvikeleka kwe-UV okumaphakathi. Nokho, ucwaningo olwengeziwe lwaludingeka ukuze kuthuthukiswe ukusebenza kahle kwalo.
Intuthuko Ekuvikelweni kwe-UVB:
Ukutholakala kwe-para-aminobenzoic acid (PABA) ngeminyaka yawo-1940 kwaphawula ingqopha-mlando ebalulekile ekuvikelweni kwelanga. I-PABA yaba yisithako esiyinhloko kuma-sunscreens, emunca ngokuphumelelayo imisebe ye-UVB ebangela ukushiswa yilanga. Naphezu kokusebenza kwayo, i-PABA yayinemikhawulo, njengokucasuka kwesikhumba okungase kube khona kanye nokungezwani komzimba nezinto ezithile, okwenza kudingeke ezinye izithako.
I-Broad-Spectrum Protection:
Njengoba ulwazi lwesayensi lukhula, kwagxilwa ekuthuthukiseni izithako ezingavikela emisebeni yomibili ye-UVB ne-UVA. Ngeminyaka yawo-1980, i-avobenzone yavela njengesihlungi se-UVA esisebenzayo, esihambisana nokuvikelwa okukhona kwe-UVB okuhlinzekwa ngamakhilimu elanga asekelwe ku-PABA. Nokho, ukuzinza kwe-avobenzone ngaphansi kokukhanya kwelanga kwakuyinselele, okwaholela ekwakhiweni okwengeziwe.
Ukuthwebula izithombe kanye nokuvikelwa kwe-UVA okuthuthukisiwe:
Ukuze kubhekwane nokungaqini kwezihlungi ze-UVA zakuqala, abacwaningi bagxile ekuthuthukiseni ukuqina kwezithombe nokuvikelwa kobubanzi obubanzi. Izithako ezifana ne-octocrylene ne-bemotrizinol zathuthukiswa, zinikeza ukuzinza okuthuthukisiwe nokuvikelwa kwe-UVA okuphakeme. Lokhu kuthuthukiswa kuthuthukise kakhulu ukusebenza nokuthembeka kwama-sunscreen.
Izihlungi ze-Organic UVA:
Eminyakeni yakamuva, izihlungi ze-UVA eziphilayo zithole ukuvelela ngenxa yokuvikela kwazo okukhethekile kwe-UVA kanye nokuzinza okuthuthukisiwe. Izithako ezifana ne-Mexoryl SX, i-Mexoryl XL, ne-Tinosorb S ziguqule izinto zokuvikela ilanga, zinikeza ukuzivikela kwe-UVA kwekhwalithi ephezulu. Lezi zithako seziyingxenye yokwakhiwa kokuvikela ilanga kwesimanje.
Amasu Okusungula Okusha:
Ngokuhambisana nentuthuko yesithako, amasu okuqamba abambe iqhaza elibalulekile ekuthuthukiseni ukusebenza kwezithako zokuvikela ilanga zamakhemikhali. I-Nanotechnology ivule indlela yezinhlayiya ezincane, enikeza ukumbozwa okusobala kanye nokumuncwa okuthuthukisiwe kwe-UV. Ubuchwepheshe be-encapsulation buye basetshenziswa ukuze kuthuthukiswe ukuzinza nokwandisa ukulethwa kwezithako, ukuqinisekisa ukusebenza kahle okuphezulu.
Ukucatshangelwa Kokulawula:
Ngokuqonda okukhulayo komthelela wezithako zokuvikela ilanga empilweni yomuntu kanye nemvelo, izindikimba ezilawulayo zisebenzisa imihlahlandlela nemikhawulo. Izithako ezifana ne-oxybenzone ne-octinoxate, ezaziwa ngomthelela wazo ongase ube khona emvelweni, zenze imboni yakha ezinye izindlela, ezibeka phambili ukuphepha nokusimama.
Isiphetho:
Ukuvela kwezithako kumakhemikhali okuvikela ilanga kuguqule ukuvikelwa kwelanga embonini yezimonyo. Kusukela kuzihlungi zakuqala ze-organic kuye ekuthuthukisweni kokuvikelwa kwe-UVA okuthuthukisiwe nezindlela ezintsha zokuqamba, imboni yenze amagxathu abalulekile. Ucwaningo oluqhubekayo nokuthuthukiswa kuzogqugquzela ukudalwa kwemikhiqizo yokuvikela ilanga ephephile, esebenza kahle kakhulu, futhi ehambisana nemvelo, eqinisekisa ukuvikelwa elangeni okuphelele kubathengi.
Isikhathi sokuthumela: Mar-20-2024