Zvinonyungudutsa UV, zvinozivikanwawo semafirita eUV kana kuti masunscreen, zvinhu zvinoshandiswa kudzivirira zvinhu zvakasiyana-siyana kubva kumigumisiro inokuvadza yemwaranzi ye ultraviolet (UV). Imwe yemhando iyi yeUV absorber iUV234, inova sarudzo yakakurumbira yekudzivirira kubva kumwaranzi ye UV. Muchinyorwa chino tichaongorora mhando dzezvinonyungudutsa UV uye toongorora hunhu hwazvo uye mashandisirwo eUV234.

Mhando dzakasiyana dzezvinodzivirira UV dzinofukidza mhando dzakasiyana dzemakemikari akagadzirirwa kunyudza nekuparadza mwaranzi yeUV. Mishonga iyi inowanzo shandiswa muzvigadzirwa zvakaita sezvinodzivirira zuva, mapurasitiki, pendi nemachira kudzivirira kuora nekukuvadzwa kunokonzerwa nekusvibiswa neUV. Zvinodzivirira UV zvinoshanda nekunyudza mwaranzi yeUV uye kuishandura kuita kupisa kusingakuvadzi, nokudaro zvichidzivirira zvinhu kubva kumigumisiro inokuvadza yemwaranzi yeUV.

Zvishandiso zvinonyungudutsa UV zvakakamurwa muzvikamu zvakasiyana zvichienderana nechimiro chazvo chemakemikari uye maitiro azvo. Mamwe marudzi akajairika ezvishandiso zvinonyungudutsa UV anosanganisira benzophenones, benzotriazoles, uye triazines. Rudzi rwega rwese rwezvishandiso zvinonyungudutsa UV rune zvakanakira uye rwakakodzera kushandiswa kwakasiyana. Semuenzaniso, UV234 ibhenzotriazole UV inonyungudutsa UV inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana nekuda kwehunhu hwayo hwakanaka hwekudzivirira UV.

UV234 inozivikanwa nekushanda kwayo kwakanyanya mukunyudza mwaranzi ye ultraviolet, kunyanya mumhando dzeUVB neUVA. Izvi zvinoita kuti ive yakanaka pakudzivirira mwaranzi ye UV yakawanda. UV234 inowanzoshandiswa muzvigadzirwa zvezuva kuti iwedzere kugona kwekudzivirira kwe UV kwechigadzirwa. Pamusoro pezvo, inoshandiswa mumapurasitiki nependi yekudzivirira kuora kwechiedza uye kuchengetedza kunaka kwechinhu chacho kana chakaiswa pachiedza chezuva.

Mashandisirwo eUV234Hazvingogumiri pakudzivirira zuva uye machira ekudzivirira. Inoshandiswawo muindasitiri yemachira kupa simba rekudzivirira UV kumachira nemafaibha. Nekushandisa UV234 mumachira, vagadziri vanogona kuwedzera kugara kwenguva refu uye kugara kwenguva refu kwechigadzirwa, zvichiita kuti chikwanise kushandiswa panze uko kunosangana nemwaranzi yeUV kusingadzivisike.

Pamusoro pesimba rayo rinobata UV, UV234 inozivikanwawo nekugona kwayo kupenya, izvo zvinoita kuti irambe ichishanda kunyangwe mushure mekuratidzwa nezuva kwenguva refu. Hunhu uhwu hwakakosha kuchengetedza mashandiro ezvigadzirwa zvine UV234, sezvo ichivimbisa dziviriro yenguva refu kubva kumwaranzi yeUV.

Pakufunga nezvemhando dzakasiyana dzezvinodzivirira UV, zvakakosha kunzwisisa zvinodiwa zvekushandisa uye huwandu hwedziviriro yeUV inodiwa. Zvinodzivirira UV zvakasiyana zvinopa mwero wakasiyana wedziviriro yeUV uye kuenderana nezvinhu zvakasiyana. Saka, zvakakosha kusarudza yakakodzeraChinonyudza UVzvichibva pakushandiswa kwacho uye hunhu chaihwo hwechinhu chiri kuchengetedzwa.

Muchidimbu, maUV absorbers anoita basa rakakosha mukudzivirira zvinhu kubva mukukuvadza mwaranzi yeUV. UV234 ibhenzotriazole UV absorber inoshandiswa zvakanyanya nekuda kwehunhu hwayo hwakanaka hwekudzivirira UV uye kugona kwayo kupora. Kunzwisisa huwandu hwemaUV absorbers uye hunhu hwawo hwakakosha pakusarudza absorber yeUV yakakodzera kushandiswa. Ingave iri mumafuta ekudzivirira zuva, mapurasitiki, machira kana machira, maUV absorbers akadai seUV234 anopa dziviriro yakavimbika kubva kumwaranzi yeUV, zvichibatsira kuwedzera hupenyu hwezvinhu zvakasiyana-siyana.