nkhani

Tsopano anthu ali ndi zisankho zambiri pakusamalira khungu, zosakaniza zoteteza ku dzuwa ndizoposa mitundu 10, koma zinthu zina zosamalira khungu zimawoneka ngati chisamaliro chakhungu ndizowonjezereka kuvulaza khungu lathu. Ndiye timasankha bwanji zosamalira khungu zoyenera pakhungu lathu? Tiyeni tikambirane za benzophenone-4, chinthu chofunika kwambiri pakhungu.

Kodi benzophenone-4 ndi chiyani?

Benzophenone-4ndi benzophenone pawiri, amatchedwa BP-4, mankhwala chilinganizo C14H12O6S. Ndi ufa woyera kapena wopepuka wachikasu kutentha kwa chipinda ndipo ukhoza kuyamwa bwino UV kuwala kwa 285 mpaka 325 Im. BP-4 ili ndi ubwino wa kuyamwa kwakukulu, kusakhala ndi poizoni, kusakhala ndi teratogenic, kuwala kwabwino komanso kukhazikika kwamafuta, etc., UV-Absorption BP-4 imatha kuyamwa UV-A ndi UV-B. pa nthawi yomweyo, ndi kalasi I sunscreen ovomerezedwa ndi United States FDA, United States ndi mayiko a ku Ulaya ndi mkulu pafupipafupi ntchito, makamaka ntchito sunscreen kirimu ndi zodzoladzola sunscreen.

Uv absorbent BP-4si poizoni, chosayaka, chosaphulika, chosavuta kuyamwa chinyezi mumlengalenga, ndi ntchito yabwino kwambiri ya acidic amadzimadzi UV kuyamwa, akhoza mwamphamvu kuyamwa UV kuwala. Amagwiritsidwa ntchito kwambiri ngati ultraviolet absorber kwa zokutira polima polima madzi ndi utoto wofiirira kuteteza photocatalytic makutidwe ndi okosijeni wa zokutira polima madzi ndi utoto wofiirira; Ndiwoteteza bwino ku dzuwa kwa zodzoladzola komanso chowumitsira UV kuti nsalu zaubweya zisawonongeke nyengo.

Benzophenone imagwiritsidwa ntchito kwambiri pazinthu zapakhomo monga magalasi adzuwa, zoikamo chakudya, zovala ndi zinthu zoyeretsera kuti zitetezedwe ku UV. Ikhoza kuwononga madzi akumwa ndikuchoka m'matumba a chakudya kupita ku chakudya. Benzophenone amagwiritsidwa ntchito mu inki zonyamula zakudya ndipo amatha kusamukira ku chakudya. Benzophenone imapezeka mwachilengedwe muzakudya zina (monga mphesa za vinyo ndi mphesa za Muscat) ndipo zimawonjezeredwa kwa ena monga chokometsera.

Pazinthu zosamalira anthu, benzophenone imagwiritsidwa ntchito ngati chowonjezera kununkhira kapena kuletsa zinthu monga sopo kuti zisatayike kununkhira ndi mtundu wake pansi pa kuwala kwa ultraviolet. Zochokera ku Benzophenone monga BP2 ndi oxybenzone (BP3) ndibenzophenone-4 (BP-4)amagwiritsidwa ntchito pa sunscreens. Oxybenzone amagwiritsidwa ntchito ngati ultraviolet absorber ndi stabilizer, makamaka mu mapulasitiki ndi sunscreens. Benzophenone ndi oxybenzone amagwiritsidwanso ntchito popukuta misomali ndi mankhwala a milomo.

Kodi benzophenone-4 amagwiritsidwa ntchito posamalira khungu?

Uv absorbent BP-4 ili ndi ubwino wa kuwala kwabwino ndi kukhazikika kwa kutentha, ndipo imagwiritsidwa ntchito kwambiri pa sunscreen cream, kirimu, uchi, mafuta odzola, mafuta ndi zodzoladzola zina zoteteza dzuwa. Makamaka oyenera sunscreen, mafuta odzola, utoto, ambiri mlingo ndi 0.1-0.5%. Mlingo wamba ndi 0.2-1.5%.

Uv absorberBP-4imasungunuka mosavuta m'madzi, ndipo njira yamadzimadzi ndi acidic, choncho iyenera kuchepetsedwa pakagwiritsidwa ntchito. Njira yothetsera PH yoposa 9 idzapangitsa kuti kuyamwa kwatalikidwe kuchepetse, kugwiritsa ntchito mafuta oteteza dzuwa tsiku ndi tsiku ndi zinthu zina zosamalira khungu kuteteza kukalamba kwa khungu chifukwa cha kuwala kwa ultraviolet.

Kodi benzophenone-4 amagwiritsidwa ntchito posamalira khungu?