ozi

Ultraviolet absorber (UV absorber) bụ ihe nkwụnye ọkụ nke nwere ike ịmịnye akụkụ ultraviolet nke ìhè anyanwụ na isi mmalite ọkụ na-enweghị mgbanwe n'onwe ya. Ihe mkpuchi ultraviolet na-abụkarị ntụ ntụ kristal ọcha, nkwụsi ike dị mma, nkwụsi ike kemịkalụ dị mma, enweghị agba, anaghị egbu egbu, enweghị isi, nke a na-ejikarị eme ihe na polymers (plastics, wdg), mkpuchi na ihe ndị ọzọ.

Imirikiti agba, ọkachasị ọdịdị na-acha akwụkwọ na-acha akwụkwọ, nwere ike ịkpọlite ​​ogo nke mmachi ọkụ mgbe ejiri ya na ngwaahịa plastik. Maka ngwaahịa plastik na-acha agba maka iji ogologo oge eme ihe n'èzí, nkwụsi ike nke ngwaahịa ahụ enweghị ike imeziwanye naanị ya. Naanị iji ihe stabilizer ọkụ nwere ike igbochi ma ọ bụ belata ọnụego ịka nká nke ngwaahịa rọba ogologo ogologo oge. Meziwanye nkwụsi ike ọkụ nke ngwaahịa rọba acha nke ọma. Ihe mgbochi amine light stabilizer (HALS) bụ klaasị nke ogige amine organic nwere mmetụta mgbochi siri ike. N'ihi ọrụ ya nke decomposing hydroperoxide, quenching oxygen radicals, trapping free radicals, and recycling of irè dị iche iche, HALS bụ plastic ìhè stabilizer na elu mgbochi foto arụmọrụ na kasị ukwuu ego n'ụlọ na ná mba ọzọ. Ihe omuma a gosiputara na ihe nkwudo ọkụ kwesiri ekwesi ma obu usoro nchikota kwesiri ekwesi nke antioxidant na ihe nkwụsi ike nke ọkụ nwere ike imeziwanye ìhè na nkwụsi ike oxygen nke ngwaahịa rọba dị n'èzí ọtụtụ oge. Maka ngwaahịa rọba na-acha site na fotoactive na photosensitive colorants (dị ka cadmium odo, uncored rutile, wdg), na-atụle catalytic photoaging mmetụta nke colorant, ọnụ ọgụgụ nke ìhè stabilizer kwesịrị ịba ụba otú ahụ.

Enwere ike kewaa ndị na-anabata Uv dabere na usoro kemịkalụ, obere ihe na ojiji, nke akọwara n'okpuru:

1.Classification dị ka chemical Ọdịdị: ultraviolet absorbers nwere ike kewaa organic ultraviolet absorbers na inorganic ultraviolet absorbers. Organic ultraviolet absorbers tumadi gụnyere benzoates, benzotriazole, cyanoacrylate, wdg, ebe inorganic ultraviolet absorbers tumadi gụnyere zinc oxide, iron oxide, titanium dioxide na na.

2.Classification dị ka usoro omume si dị: ultraviolet absorber nwere ike kewaa n'ime ụdị mkpuchi na ụdị absorption. Ndị na-ekpuchi ihe mkpuchi UV na-enwe ike igosipụta ọkụ UV ma si otú a gbochie ya ịbanye n'ime ahụ, ebe ndị na-ekpuchi UV na-enwe ike ịmịnye ọkụ UV ma gbanwee ya ka ọ bụrụ ọkụ ma ọ bụ ìhè a na-ahụ anya.

3.Classification dị ka ojiji: ultraviolet absorbent nwere ike kewaa ịchọ mma ọkwa, nri ọkwa, ọgwụ ọkwa, wdg ịchọ mma ọkwa UV absorbers na-tumadi ji sunscreen, akpụkpọ na-elekọta ngwaahịa na ihe ịchọ mma ndị ọzọ, nri ọkwa UV absorbers na-tumadi ji nri. Ihe nkwakọ ngwaahịa, na ọgwụ ọkwa UV absorbers na-ejikarị na ọgwụ.

Ụlọ ọrụ Unilong bụ ọkachamaraOnye nrụpụta UV, anyị nwere ike ịnye ihe ndị aUsoro UVnke ngwaahịa, ọ bụrụ na ịchọrọ, biko nweere onwe gị ịkpọtụrụ anyị