Hydroxypropyl methylcellulose (HPMC) chinhu chakakosha chine mashandisirwo akasiyana-siyana muindasitiri yemishonga pamwe nemamwe maindasitiri akadai sezvekudya, zvekuzora uye zvekuvaka. Kudiwa kweHPMC kwave kuchikura zvishoma nezvishoma mumakore apfuura nekuda kwehunhu hwayo hwakasiyana hwakadai sekukora, kusunga, kugadzira mafirimu uye kuchengetedza mvura. Muchinyorwa chino, tichakurukura nzira yekugadzira alkaline leaching yehydroxypropyl methylcellulose (HPMC).
Nzira yekugadzira alkali leaching yehydroxypropyl methylcellulose (HPMC) inzira iyo cellulose inosangana nepropylene oxide nemethyl chloride kana paine alkali. Maitiro aya anoitika pasi pekupisa, kumanikidzwa uye nguva yakatarwa kuti agadzire zvigadzirwa zveHPMC zvemhando yepamusoro.
Danho rekutanga pakugadzira HPMC uchishandisa nzira yekugadzira alkaline leaching kugadzirira cellulose raw material. Cellulose inotanga yacheneswa nekubvisa tsvina yese yozoshandurwa kuita alkali cellulose nekurapa nealkali yakadai sesodium hydroxide. Danho iri rakakosha nekuti rinowedzera reactivity yecellulose ne reagents dzinoshandiswa mumatanho anotevera.
Alkali cellulose inorapwa nemusanganiswa wepropylene oxide nemethyl chloride pasi pekupisa nekumanikidzwa kwakarongwa. Kuita pakati pealkali cellulose ne reagent kunoguma nekuumbwa kwechigadzirwa, icho chiri musanganiswa wehydroxypropyl methylcellulose nezvimwe zvigadzirwa.
Musanganiswa wacho unogezwa, wobviswa tsvina uye wosefa kuti ubvise tsvina dzakadai sezvinhu zvisina kubatwa uye zvimwe zvinobuda. Mhinduro yacho inobva yasanganiswa nekupwanyika kwemvura kuti pave nechinhu chakachena kwazvo cheHPMC.
Nzira yekugadzira alkali leaching yehydroxypropyl methylcellulose (HPMC) ine zvakanakira zvakawanda zvichienzaniswa nedzimwe nzira dzekugadzira dzakadai se etherification. Chimwe chezvakanakira ndechekuti inzira isingakuvadzi nharaunda. Kusiyana nedzimwe nzira, nzira yekugadzira alkali leaching haishandisi halogenated solvents inokuvadza nharaunda nehutano hwevanhu.
Imwe mukana weiyi nzira ndeyekugadzira zvigadzirwa zveHPMC zvakachena kwazvo. Mamiriro ekugadzirisa akadzorwa anoita kuti chigadzirwa chekupedzisira chive chemhando yepamusoro uye chakakodzera kushandiswa kwakasiyana-siyana.
Kushandiswa kweHPMC muindasitiri yemishonga kwakakosha pakugadzira mapiritsi, makapisiri nedzimwe mhando dzemushonga. HPMC inogona kushandiswa semushonga wekubatanidza, kubvisa mushonga, kufukidza, nezvimwewo. Kushandiswa kweHPMC mukushandisa uku kunoita kuti mushonga uve wemhando yepamusoro uye unosangana nezvinodiwa.
HPMC inoshandiswawo sechinhu chinosimbisa, chinosanganisa makemikari uye chinosimbisa ganda muindasitiri yezvikafu. Kushandiswa kweHPMC muzvigadzirwa zvekudya kunoita kuti pave nekunaka, kunaka uye kunaka kwakafanana.
Muindasitiri yekuvaka, HPMC inoshandiswa sechiwedzerwa chesimende kuvandudza kushanda zvakanaka, kuchengetedza mvura uye hunhu hwekubatanidza simende. Kushandiswa kweHPMC kunoita kuti zvigadzirwa zvekuvaka zvive zvemhando yepamusoro uye zvinosangana nezvinodiwa.
Muchidimbu, nzira yekugadzira alkali leaching yehydroxypropyl methylcellulose (HPMC) inzira yekugadzira zvigadzirwa zveHPMC zvemhando yepamusoro uye inoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana akadai semishonga, chikafu, uye kuvaka. Kushandiswa kweHPMC mukushandiswa uku kunoita kuti chigadzirwa chive chemhando yepamusoro uye chinosangana nezvinodiwa. Nzira iyi yekugadzira zvakare ine hushamwari kune nharaunda uye inogadzira chigadzirwa cheHPMC chakachena kwazvo.
Nguva yekutumira: Gunyana-15-2023