Cov tshuaj pleev ib ce hydroxypropyl methylcellulose (HPMC) yog ib qho tshuaj sib xyaw ua ke uas siv tau ntau yam hauv ntau yam lag luam xws li tshuaj pleev ib ce, tshuaj ntxuav tes thiab cov khoom siv tu tus kheej. Nws yog ib qho cellulose ether uas tsis yog ionic uas tau tsim los ntawm kev hloov kho tshuaj ntawm cov cellulose ntuj. HPMC yog ib qho derivative ntawm methylcellulose (MC) uas muaj cov pab pawg hydroxypropyl uas muab nws cov yam ntxwv tshwj xeeb xws li kev khaws cia dej siab, kev nplaum zoo dua, thiab muaj peev xwm ua zaj duab xis zoo heev.
HPMC qib zoo nkauj yog cov polymer qib zaub mov uas lwj tau thiab muaj kev nyab xeeb rau kev siv ntau yam, suav nrog cov thickeners, stabilizers, suspending agents, emulsifiers thiab binders. Nws yooj yim yaj hauv dej, thiab nws cov viscosity tuaj yeem hloov kho los ntawm kev hloov nws qib ntawm kev hloov pauv (DS) thiab qhov hnyav molecular ntawm cov polymer.
Hauv kev lag luam tshuaj pleev ib ce, HPMC uas yog tshuaj lom neeg txhua hnub siv los ua cov khoom ua kom tuab thiab cov khoom sib txuas hauv cov khoom siv tu tawv nqaij xws li tshuaj pleev, tshuaj pleev, thiab tshuaj pleev gel. Nws pab tsim kom muaj cov qauv du, tsis muaj roj thiab ua kom cov khoom muaj zog noo noo. HPMC kuj tseem txhim kho kev sib kis ntawm cov khoom, ua rau lawv yooj yim sib kis rau ntawm daim tawv nqaij.
Hauv cov khoom siv saib xyuas plaub hau, HPMC qib zoo nkauj yog siv los ua zaj duab xis, tsim ib txheej tiv thaiv nyob ib puag ncig cov plaub hau, tiv thaiv kev poob dej noo thiab ntxiv qhov ci. Nws kuj tseem siv los ua tus neeg sawv cev tuab hauv cov tshuaj zawv plaub hau thiab cov tshuaj pleev plaub hau, txhim kho nws cov qauv thiab txhim kho nws cov kev ua tau zoo.
Hauv kev lag luam ntxuav khaub ncaws, HPMC uas yog tshuaj lom neeg txhua hnub yog siv los ua cov khoom ua kom tuab thiab ruaj khov hauv cov tshuaj ntxuav khaub ncaws ua kua thiab cov tshuaj ua kom ntaub mos. Nws pab tswj cov viscosity ntawm cov khoom thiab tiv thaiv lawv kom tsis txhob sib cais. HPMC kuj tseem ua rau cov khoom xyaw hauv cov khoom yaj tau zoo dua, ua rau nws ua haujlwm tau zoo dua.
Hauv kev lag luam saib xyuas tus kheej, HPMC uas yog tshuaj lom neeg txhua hnub yog siv los ua tus neeg sawv cev rau cov khoom siv hauv qhov ncauj xws li tshuaj txhuam hniav thiab tshuaj ntxuav qhov ncauj. Nws pab kom cov khoom xyaw nquag nyob hauv cov khoom, kom ntseeg tau tias muaj kev faib tawm sib npaug. HPMC kuj tseem ua kom cov khoom zoo nkauj dua, ua rau lawv xis nyob dua rau siv.
Zuag qhia tag nrho, HPMC tshuaj lom neeg txhua hnub yog ib qho khoom sib xyaw thiab tseem ceeb hauv ntau yam lag luam. Nws cov yam ntxwv tshwj xeeb, xws li kev khaws dej siab, kev nplaum zoo dua thiab muaj peev xwm ua zaj duab xis zoo heev, ua rau nws zoo tagnrho rau ntau daim ntawv thov. Nws cov biodegradability thiab kev nyab xeeb kuj ua rau nws yog qhov kev xaiv nrov rau cov tuam txhab tsim khoom uas tab tom nrhiav kev tsim cov khoom lag luam zoo rau ib puag ncig thiab muaj kev nyab xeeb.
Hauv kev xaus, HPMC qib tshuaj pleev ib ce yog ib qho tseem ceeb uas muaj ntau yam khoom siv tau. Siv dav hauv cov tshuaj pleev ib ce, tshuaj ntxuav tes, khoom siv tu tus kheej thiab lwm yam lag luam. Nws qhov kev hloov pauv tau yooj yim thiab kev nyab xeeb ua rau nws zoo tagnrho rau cov chaw tsim khoom uas tab tom nrhiav kev tsim cov khoom lag luam zoo thiab zoo rau ib puag ncig.
Lub sijhawm tshaj tawm: Lub Xya Hli-19-2023