Ultraviolet absors be se ka yeelenba dɔ minɛ min ka bon-energy ultraviolet, k’u yɛlɛma fanga cogoya la, ka fanga bɔ, ka sɔrɔ k’a dumu funteni barika la walima a ka juguman min tɛ foyi lase mɔgɔ ma, walisa ka farikolo tiɲɛni bali min be sɔrɔ ultraviolet ray fɛ, ani ka fotofiziki ni fotosimikiw bali. Sisan, UV minw ka teli ka baara kɛ, olu ye benzofenoniw, benzotriazɔliw, salisiliye, akrilontiriw, triazini ani fɛn wɛrɛw ye. Danfara dɔw be yen. Shanghai Jingyan Chemical min be tugu o la, ale bena UV ka baarakɛcogo sifa caaman ka baara kɛcogo yira.
1. Bɛnzofenoniw
Benzofenone UV fɛnw ye UV yɛlɛmalanw ye minw be baara kɛ ka caya, minw be UV -A, UV-B ani UV-C minɛ dɔɔni dɔɔni. Keton kulu ni idɔrɔkisili kulu min be molekili kɔnɔ, o be se ka kɛ idɔrɔzɛni ɲɔgɔndan ye min be kɛ ka butili chelati kɛ. O kɔ, u be yeelen ultraviolet fanga sama, molekili be yɛlɛma yɛlɛma, u be idɔrɔzɛni nɔrɔ ɲɔgɔn na, u be chelati nɛgɛkunbɛnnan dayɛlɛ ani ultraviolet fanga be yɛlɛma ka kɛ funteni fanga ye ani a be bɔ. Ka fara o kan, karbɔni kulu min be molekili kɔnɔ, o bena diya ultraviolet fanga min be sama, o bena kɛ sababu ye ka yɛlɛmani ni enol labɛn, o min fana be fanga yɔrɔ dɔ dumu. O UV yɛlɛmani sugu la, idɔrɔzɛni intramolekili ɲɔgɔndan fanga be taga n’a ka yeelen basigili nɔɔ ye. UV ka yɔrɔ min be se ka yɛlɛma, o fana be taga ni alkoksi ka jɔlɔkɔ janya ye benzeni nɛgɛ kan. Ni a janya be bɛn ni polimɛri ye, basigili nɔɔ be bɛn. Benzofenone UV min be sɔrɔ benzofenoni kɔnɔ, karbɔni lɔyɔrɔ ka kan ka kɛ ni idɔrɔkisili kulu 10 ye, n’o tɛ, a tɛ se ka idɔrɔzɛni kɔnɔyɔrɔ dilan ani a tɛ se ka kɛ UV yɛlɛmalan ye. O kɔ, u be bɛn ni polimeriw ye minw ka molekiliw ka ca. Ni idɔrɔkisili kulu fila be karbɔnili kulu ka ɔritɔri lɔyɔrɔ la, a be se ka 300-400 fm fana minɛ, ani a be se ka yeelen yeta yɔrɔ dɔ fana minɛ. Ka sabu kɛ yeelen min be ye, yeelen min be ɲɔgɔn na, o tɛ bɛn, ani barokun minw be UV samalan nin don a la, u be komi nɛrɛmuguman. O ɲɔgɔndan min be kɛ ni polimeri molekiliw ye, o fana man ɲi, o kama a ka baarakɛcogo ka dɔgɔ. Hali ni benzofenone min tɛ o-hidroksili kulu fana la, o fana be se ka ultraviolet yeelenw sama, a bena a yɛrɛ-lafiɲɛ kɛ n’a be yeelen na, o la a man ɲi ka kɛ i n’a fɔ ultraviolet.
2. Salisilati
Salisilati UV nɛgɛw ye fɔlɔ ye ka baara kɛ, ani salisilati fana be ni idɔrɔzɛni nɔrɔnanw ye molekili kɔnɔ. O ultraviolet ultraviolet be se ka yeelen ultraviolet minɛ a daminɛ na, ani a ka nɔgɔ hakɛ ka dɔgɔ kosɔbɛ (a ka dɔgɔ ni 340vm ye), nka wagati dɔ tɛmɛnin kɔ, a ka nɔgɔ be caya dɔɔni dɔɔni fɔɔ ka taga se a ka fɛnw hakɛ ma, o min be sɔrɔ ultraviolet ka yɛlɛmani fɛ. , ka benzofenoni yɔrɔ dɔ dilan ni ultraviolet ye, o min b’a to a ka ultraviolet be yɛlɛma. O kama, a be weele ko piyɔniye UV Absorber. Dihydroxybenzofenone n’a bɔyɔrɔw be molekiliw labɛn kokura, u be se ka yeelen yeta yɔrɔ dɔ minɛ ani u be kɛ i n’a fɔ nɛrɛmuguman, o be kɛ sababu ye ka fɛɛn minw fara a kan, u be nɛrɛmuguman ye.
3. Benzotriazɔliw
Benzotriazɔli ultraviolle abstateurs ka baarakɛcogo be i n’a fɔ benzofenone ta. Yeelen min be se ka ye mɛtiriw sanfɛ, o la, o fɛɛn tɛna kɛ kulɛri ye;
4. Akrilɔnitirili ni triazini min be yɛlɛma .
Ka fara o kan, akrilontirili ni triazini ultraviolet absor minw be yɛlɛma, ka kɛɲɛ ni wale kɛcogo ye, olu fana be cis-trans isomerizasiyɔn na, walisa yeelen ka fanga ka yɛlɛma ka kɛ fanga ye min tɛ se ka mɔgɔ tɔɔrɔ, ani ultraviolet be se ka yɛlɛma 290-320 fm Ultraviolet fɛ, a tɛ yeelen ye min be ye, ani a tɛna kɛ sababu ye ka . jikuru, ani ultraviolet absort be se ka kromozeni genocide ni kromozeni kulu minɛ ni 400-M duguma, o minw bɛɛ be ɲɔgɔn minɛ ni aromatiki ye.
5. Kalan wɛrɛw
Organickel be se ka kɛ fana i n’a fɔ UV min be se ka yɛlɛma, nka a ka ca a la, a be jati i n’a fɔ fɛnɲɛnamafagalan, min be se ka UV yeelen minɛ ka tɛmɛ fɔlɔ kan, nka a be polimɛri bɔli bali ka UV yeelen sama. Organoickel polimeri be yɛlɛma ni molekiliw ye minw be polimɛri kɔnɔ minw be nisɔndiya ni yeelen ye min be bɔ yeelen ultraviolet kɔnɔ, o la, yɛlɛmani be segi ka taga yɔrɔ min na. Dugukolo cogoya la, ultraviolet fanga be yɛlɛma ka kɛ yɔrɔ dɔgɔman ye-energy spectre ye k’a sɔrɔ a ma a halaki. Walisa ka polimɛri tanga a kana tiɲɛ, a be weele ko emcher sabu a ka baara kɛcogo tɛ kelen ye ni UV yɛlɛmalanw ta ye. UV absorers b’u ka molekiliw labɛncogo yɛlɛma, ani nɛgɛw be fanga dɔrɔn lo bɔ min be se ka kɛ sababu ye ka fanga yɛlɛma.
Ka fara o kan, karibɔni finman, titanium diwɔsidi, zɛnki oksidi, zɛnki barium ani tile latangafɛn wɛrɛw fana ye fɛɛn dɔw ye minw be se ka yeelen ultraviolet sama wala k’a yira. Blocking layer be sigi polimɛri ni yeelen bɔyɔrɔ cɛ walisa ka yeelen ultraviolet sama wala k’a yira. N’a sera polimɛri sanfɛla la, Absorbed ani a be ye, o min b’a to UV tɛ don polimɛri kɔnɔyɔrɔ la, ani karibɔni fiman lo be baara kɛ ka tɛmɛ. Radikali radikaliw fana ye fɛnw ye minw be se ka yeelenbɔlanw bɔ, ani u ye piperidine bɔyɔrɔw ye minw be ni fanga ye, u be weele ko yeelen amini.
