Cellulose ether yog ib lo lus dav dav rau cov khoom lag luam uas tsim los ntawm cov tshuaj tiv thaiv ntawm alkali cellulose thiab tus sawv cev rau qee yam. Alkali cellulose yog hloov los ntawm cov neeg sawv cev sib txawv kom tau txais cov kws muaj kev sib txawv cellulose. Raws li Ionization cov yam ntxwv ntawm cov neeg tuaj lwm tus neeg cellulose tuaj yeem muab faib ua ob pawg: ionic (xws li methyl cellulose). Raws li hom hloov chaw, ether ether tuaj yeem faib ua monether (xws li hydrothpropyl methyl cellulose). Raws li cov solubility sib txawv, nws tuaj yeem muab faib ua cov dej cellulose (xws li cov tshuaj cellulose-solub-solub
Tom qab lub cellulose ether nyob rau hauv cug tshuaj yog yaj nyob rau hauv cov khoom noj khoom haus ether, thiab cov cellulation ete, "wraps" cov khoom seem thiab npog rau sab nraud. Tsim cov duab xis lubricating, ua kom lub tshuab cug ntau ruaj khov, thiab tseem txhim kho cov fluidity ntawm lub tshuaj khib thaum cov txheej txheem sib xyaw thiab cov kev tsim kho ntawm kev tsim kho.
Vim nws tus kheej cov qauv molecular, lub cellulose etherigh daws ua rau cov dej hauv lub sijhawm ntev, tso cai rau lub tshuaj khib nyiab ntev, ua kom muaj kev sib khib nrog cov dej zoo thiab ua haujlwm.
Kev sib xyaws ntawm tus kheej hauv av xis, nrog cov viscosity holroxyprropylropylulose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose etherylculose ether. Txij li thaum tag nrho cov av yog ib txwm muaj kev cuam tshuam nrog me ntsis kev cuam tshuam los ntawm kev tuav cov txheej txheem ua tiav yav dhau los, lub tiaj nciab thiab kev tsim kho tau zoo dua. Lub sijhawm sib xyaw ua kom qhuav siv tau cov dej zoo ntawm cov dej zoo ntawm hydroxypropyl methellulose. Txij li thaum tus kheej txoj kev vam meej yuav tsum tau hais tias tusyees cug yuav tsum tau nce qib hauv av, cov khoom siv dej yog tus loj. Tom qab ntxiv HPMC, nws yuav tswj hwm rau hauv av cov dej ua kom muaj zog ntawm lub ntsej muag tsis pom zoo, thiab shrinkage yog me me, uas txo cov kab nrib pleb. Qhov kev sib ntxiv ntawm HPMC tseem muab cov viscosity, uas tuaj yeem siv ua kev tiv thaiv kev ua kom tsis taus, txhim kho felledicity thiab tsis muaj zog, thiab txhim kho kev ua haujlwm ntawm kev ua av hauv av.
Cov cellulose zoo muaj lub ntsej muag muag nplaim taw pom thiab lub ntom ntom me me; Ntshiab HPMC muaj cov khoom zoo heev, cov khoom siv raw siv tau yooj yim, cov kev hloov pauv ntawm cov khoom siv amonia, thiab tsis muaj ammonia, cov hmoov txhuv nplej siab thiab cawv. Saj, fibrous nyob rau hauv lub tsom iav lossis tsom iav iav.
Lub Sijhawm Post: Feb-14-2025