Masu ɗaukar UV sune mafi yawan amfani da masu daidaita haske, waɗanda zasu iya ɗaukar haske kusa da{0} ultraviolet kuma suna ɓata makamashin haske. Ita kanta mai amfani da hasken ultraviolet na iya daukar makamashin hasken ultraviolet, sannan ya mayar da shi wani nau’in makamashin zafi wanda baya gurbata muhalli ya sake shi, amma da kyar ya sha hasken da ake iya gani da kansa, kuma yana da kyakykyawan yanayin hoto. To mene ne tsarin aiki na abin sha na waje?
Hanyar aiki na UV absorbers
UV absorber yana da tsarin kwayoyin halitta na musamman, kuma yawancin tsarin suna da haɗin gwiwar hydrogen intramolecular. A ƙarƙashin yanayin al'ada, an rufe haɗin gwiwar hydrogen. Lokacin da hasken ultraviolet ya haskaka shi tare da tsawon tsayin 290{4}}400 nm, zai sami kuzarin hasken ultraviolet kuma ya sami kuzari. Canja wurin proton na intramolecular yana buɗe haɗin haɗin hydrogen na intramolecular, kwayar ta zama tsarin ketone mara ƙarfi kuma ya dawo cikin yanayin ƙasa, kuma a lokaci guda yana jujjuya makamashin haske zuwa makamashin zafi ya sake shi, wanda yayi daidai da ɗaukar makamashin hasken ultraviolet da kansa, yana guje wa babban tsarin ƙwayoyin cuta yana damuwa da kuzarin ultraviolet, saboda haka yana hana hasken ultraviolet. na kayan polymer.
Daban-daban iri na UV absorbers da daban-daban tasiri ayyuka kungiyoyin, kuma za a iya kullum raba zuwa benzotriazoles, benzophenones, triazines, salicylates, da dai sauransu bisa ga sinadaran Tsarin. Ana nuna hanyoyin aiwatar da nau'ikan iri daban-daban a cikin zanen da ke sama.
Masu ɗaukar UV daban-daban na iya ɗaukar haskoki na ultraviolet na tsawon tsayi daban-daban. Lokacin amfani, yakamata a zaɓi mai ɗaukar UV bisa ga nau'in polymer.
Kyakkyawan mai ɗaukar UV ya kamata ya sami yanayi masu zuwa: kyakkyawan kwanciyar hankali na sinadarai, babu wani mummunan sakamako tare da abubuwan da ke cikin samfurin; ƙwanƙwasa haskoki na UV (musamman haskoki na UV tare da tsawon 290{1}}400nm); mai kyau miscibility da uniformity Watse a cikin kayan, babu sanyi, babu exudation; Kyakkyawan kwanciyar hankali na thermal, ko da a lokacin aiki, ba zai canza ba saboda zafi, kuma ƙarancin zafi yana da ƙananan; mai shayarwa kanta yana da kwanciyar hankali na photochemical, babu bazuwa, babu canza launi; Mara launi, mara guba, mara wari; arha da sauƙin samu; resistant zuwa tsomawa.
