Hydroxypropylmethylcellulose (HPMC) ndi carboxymethylcellulose (CMC) ndi mitundu iwiri yosiyana ya ma polima omwe amagwiritsidwa ntchito popanga madontho a maso, omwe nthawi zambiri amagwiritsidwa ntchito pochepetsa zizindikiro za maso ouma. Ngakhale ali ndi zofanana zina, mankhwala awiriwa ali ndi kusiyana koonekeratu mu kapangidwe ka mankhwala, mawonekedwe, momwe amagwirira ntchito, ndi momwe amagwiritsidwira ntchito kuchipatala.
Madontho a m'maso a Hydroxypropyl methylcellulose (HPMC):
1. Kapangidwe ka mankhwala:
HPMC ndi chinthu chopangidwa kuchokera ku cellulose, polima wachilengedwe womwe umapezeka m'makoma a maselo a zomera.
Magulu a hydroxypropyl ndi methyl amalowetsedwa mu kapangidwe ka cellulose, zomwe zimapatsa HPMC mawonekedwe apadera.
2. Kukhuthala ndi rheology:
Madontho a maso a HPMC nthawi zambiri amakhala ndi kukhuthala kwakukulu kuposa madontho ena ambiri opaka mafuta m'maso.
Kukhuthala kwa madontho kumathandiza kuti madonthowo akhalebe pamwamba pa maso kwa nthawi yayitali, zomwe zimapangitsa kuti khungu likhale lofewa kwa nthawi yayitali.
3. Njira yogwirira ntchito:
HPMC imapanga gawo loteteza komanso lopaka mafuta pamwamba pa maso, kuchepetsa kukangana ndikuwongolera kukhazikika kwa filimu ya misozi.
Zimathandiza kuchepetsa zizindikiro za maso ouma mwa kupewa kusungunuka kwa misozi kwambiri.
4. Kugwiritsa ntchito kuchipatala:
Madontho a maso a HPMC amagwiritsidwa ntchito kwambiri pochiza matenda a maso ouma.
Amagwiritsidwanso ntchito mu opaleshoni ya maso ndi opaleshoni kuti cornea ikhale ndi madzi okwanira.
5. Ubwino:
Chifukwa cha kukhuthala kwakukulu, imatha kukulitsa nthawi yokhala pamwamba pa maso.
Amathandiza kuthetsa zizindikiro za maso ouma komanso amapereka chitonthozo.
6. Zoyipa:
Anthu ena amatha kuona zinthu zosawoneka bwino nthawi yomweyo atangoikidwa m'thupi chifukwa cha kuchuluka kwa kukhuthala kwa khungu.
Madontho a m'maso a Carboxymethylcellulose (CMC):
1. Kapangidwe ka mankhwala:
CMC ndi chinthu china chochokera ku cellulose chomwe chasinthidwa ndi magulu a carboxymethyl.
Kuyambitsa gulu la carboxymethyl kumawonjezera kusungunuka kwa madzi, zomwe zimapangitsa CMC kukhala polima yosungunuka m'madzi.
2. Kukhuthala ndi rheology:
Madontho a maso a CMC nthawi zambiri amakhala ndi kukhuthala kochepa poyerekeza ndi madontho a maso a HPMC.
Kukhuthala kochepa kumathandiza kuti khungu lizitha kukhazikika mosavuta komanso kufalikira mofulumira pamwamba pa maso.
3. Njira yogwirira ntchito:
CMC imagwira ntchito ngati mafuta odzola komanso chofewetsa khungu, zomwe zimapangitsa kuti filimu ya misozi ikhale yolimba.
Zimathandiza kuchepetsa zizindikiro za maso ouma mwa kulimbikitsa kusunga chinyezi pamwamba pa maso.
4. Kugwiritsa ntchito kuchipatala:
Madontho a maso a CMC amagwiritsidwa ntchito kwambiri pochepetsa zizindikiro za maso ouma.
Kawirikawiri amalimbikitsidwa kwa anthu omwe ali ndi vuto la maso louma pang'ono mpaka pang'ono.
5. Ubwino:
Chifukwa cha kukhuthala kwake kochepa, imafalikira mofulumira ndipo imadontha mosavuta.
Imathandiza komanso mwachangu kuthetsa zizindikiro za maso ouma.
6. Zoyipa:
Kupereka mlingo wochuluka kungafunike poyerekeza ndi kupanga ma viscosity apamwamba.
Mankhwala ena amatha kugwira ntchito kwa nthawi yochepa pamwamba pa maso.
Kusanthula koyerekeza:
1. Kukhuthala:
HPMC ili ndi kukhuthala kwakukulu, kupereka mpumulo wokhalitsa komanso chitetezo chokhazikika.
CMC ili ndi kukhuthala kochepa, zomwe zimathandiza kuti ifalikire mwachangu komanso kuti ilowe mosavuta.
2. Nthawi yogwira ntchito:
HPMC nthawi zambiri imapereka nthawi yayitali yogwira ntchito chifukwa cha kukhuthala kwake kwakukulu.
CMC ingafunike kuperekedwa mankhwala pafupipafupi, makamaka ngati maso anu ali ouma kwambiri.
3. Chitonthozo kwa wodwala:
Anthu ena angaone kuti madontho a maso a HPMC poyamba amachititsa kuti maso asaone bwino chifukwa cha kukhuthala kwawo.
Madontho a maso a CMC nthawi zambiri amaloledwa bwino ndipo amachititsa kuti khungu lisawoneke bwino poyamba.
4. Malangizo azachipatala:
HPMC nthawi zambiri imalimbikitsidwa kwa anthu omwe ali ndi vuto la maso louma pang'ono mpaka lalikulu.
CMC nthawi zambiri imagwiritsidwa ntchito pa maso ouma pang'ono mpaka pang'ono komanso kwa iwo omwe sakonda njira yopyapyala kwambiri.
Madontho a m'maso a Hydroxypropylmethylcellulose (HPMC) ndi carboxymethylcellulose (CMC) ndi njira zofunika kwambiri pochiza zizindikiro za maso ouma. Kusankha pakati pa ziwirizi kumadalira zomwe wodwalayo amakonda, kuuma kwa diso louma, komanso nthawi yomwe akufuna kuchitapo kanthu. Kukhuthala kwakukulu kwa HPMC kumapereka chitetezo chokhalitsa, pomwe kukhuthala kochepa kwa CMC kumapereka mpumulo mwachangu ndipo kungakhale chisankho choyamba kwa anthu omwe ali ndi vuto la maso osawona bwino. Akatswiri a maso ndi akatswiri osamalira maso nthawi zambiri amaganizira izi akamasankha madontho oyenera kwambiri a maso kwa odwala awo, omwe adapangidwa kuti awonjezere chitonthozo ndikuchepetsa bwino zizindikiro za maso ouma.
Nthawi yotumizira: Disembala-25-2023