Cov kws qhia txog cellulose yog chav kawm ntawm cov chav kawm polymer uas paub txog alkyl, Phenolic lossis hloov chaw AMino rau hauv cov xov tooj ntawm lub cev los ntawm kev hloov kho tshuaj lom neeg. Cellulose, raws li cov muaj ntau heev ntuj polymer hauv ntiaj teb, muaj kev tiv thaiv zoo biodegradability thiab ib puag ncig kev tiv thaiv kev ua tau zoo thiab ib puag ncig kev tiv thaiv. Cov cellulose muaj kev hais ua yog tseem ceeb derivatives ntawm cellulose. Vim yog lawv cov solubility kho tau, thickening thiab zoo qauv, lawv tau siv dav hauv kev tsim kho, tshuaj pleev ib ce, khoom noj khoom haus.
1. Cov qauv thiab cov khoom ntawm cov kws ua haujlwm ntawm cellulose
Cov tshuaj tua neeg cellulose yog tsim los ntawm cov tshuaj tiv thaiv ntawm cov tshuaj tua kab mob uas muaj cov etheroacetic acid, methyl chloride, thiab lwm yam) los ntawm herherification cov tshuaj tiv thaiv. Piv nrog ntuj cellulose, cellulose ither molecules muaj cov pab cuam ether ether (-), uas tuaj yeem hloov lawv lub cev thiab tshuaj.
1.1 Dej Solubility thiab Solubility
Cellulose Cov neeg muaj kev hais ua tau muaj kev ua kom zoo solubility, tshwj xeeb tshaj yog nyob rau hauv dej thiab cov kuab tshuaj organic. Nws solubility yog cuam tshuam los ntawm cov hloov chaw. Piv txwv li, methyl cellulose (MC) thiab hydroxyethyl cellulose, uas yog tsim rau cov txheej txheem dej, uas yog qhov tsim nyog txhim kho hauv solubility, o thiab gelling cov khoom.
1.2 thickening cov nyhuv
Cov neeg muaj kev hais ua ke cellulose muaj qhov ua kom tuab ntawm cov dej thiab feem ntau siv hauv cov khoom lag luam xws li cov txheej xwm, tshuaj ntxuav, cov nplaum thiab cov tshuaj pleev ib ce. Nws cov txheej txheem thickening feem ntau yog nyob ntawm cov kev hydration ntawm cellulose molecular chains thiab cov kev sab nraud ntawm cov pab pawg ether. Hauv kev, methyl cellulose (MC) thiab hydroxypropyl cellulose (HPMC) tuaj yeem hloov kho lub viscosity ntawm lub system viscosity thiab ua kom cov khoom ruaj khov thaum siv.
1.3 kub siab heev
Qee cov cellulose muaj kev hais txog, xws li hydroxyprropy cellulose (HPMC), yog qhov kub siab thiab qhia qhov kev hloov pauv ntawm solubility, viscosity thiab lwm yam nrog qhov ntsuas kub. Cov khoom siv no ua rau lawv muaj txiaj ntsig tshwj xeeb hauv cov sijhawm tshwj xeeb, xws li kev ntsuas kub-tswj cov colloids, cov tshuaj siv tshuaj yeeb thiab lwm thaj teb.
1.4 Cov Kev Ua Si Deg
Qee hom ntawm cov cellulose muaj kev yog tus neeg muaj cai hais tias xws li methyl cellulose (MC) thiab hydrothethyl cellulose (HEC), yog qhov muaj kev sib cav sib ceg thiab muaj cov khoom zoo emulsifying. Qhov no ua rau lawv cov khoom siv raw zoo rau emulsions, ua npuas ncauj thiab cream.
2. Cov ntsiab lus tseem ceeb ntawm cov kws ua haujlwm hauv cellulose
Muaj ntau ntau hom cellulose muaj kev hais ua neeg muaj cai, thiab cov nquag muaj raws li hauv qab no:
2.1 Methyl Cellulose (MC)
Methyl cellulose yog cov khoom ua los ntawm cov tshuaj tiv thaiv ntawm cov dej, thiab feem ntau yog siv hauv kev lag luam zoo li kev tsim kho, tshuaj, tshuaj pleev ib ce thiab khoom noj.
2.2 hydroxyethyl cellulose (HEC)
Hydroxyethyl cellulose yog tsim los ntawm cov tshuaj tiv thaiv ntawm cellulose thiab chloroethanol. Nws muaj kev ua kom siab solubility thiab thickening cov khoom thiab yog siv dav hauv cov dej txheej txheem thiab cov khoom saib xyuas tus kheej. Piv nrog methyl cellulose, hydroxyethyl cellulose muaj cov nyhuv tuab tuab thiab tuaj yeem txhim kho kev tsim kho cov dej ua haujlwm.
2.3 hydroxypropy kasthyl cellulose (HPMC)
Qhov no yog lub cellulose ether uas siv dav hauv kev tsim kho, tshuaj, khoom noj, muaj peev xwm ua kom zoo dua, thiab muaj cov teebmeem cuam tshuam zoo thiab muaj teebmeem.
2.4 Cellulose Etheny (EC)
Ethyl cellulose yog lub cellulose molecule uas qhia cov pab pawg ua kom pom cov tshuaj tiv thaiv cellulose los ntawm kev ua kom muaj zog thiab muaj zog hydrophlomicity. Nws muaj cov ntawv thov tseem ceeb hauv kev tswj hwm cov xim av, pleev xim thiab yeeb tshuaj.
3. Cov ntawv thov ntawm cellulose muaj kev hais ua
3.1 Kev Tsim Kho Kev Tsim Kho
Daim ntawv thov cov neeg muaj kev pab cuam ntawm kev tsim kho hauv kev tsim kho yog qhov tshwj xeeb hauv cov ceg tawv, xaim hluav taws xob thiab cug qhuav ua cov thickeners thiab ntxiv rau txhim kho kev ua haujlwm. Nws tuaj yeem txhim kho cov haujlwm cug, qeeb lub sijhawm ziab, txhim kho cov kab nrib pleb, thiab txhim kho cov nplaum ntawm cov txheej txheem.
3.2 Tshuaj pleev ib ce
Daim ntawv thov ntawm cellulose muaj cov neeg muaj kev pab nyob hauv cov tshuaj pleev ib ce yog feem ntau raws li cov tuab tuab, emulsifiers thiab stabilizers. Lawv tuaj yeem txhim kho cov khoom lag luam, txhim kho qhov kev xav zoo, nce cov lub zog ntawm daim tawv nqaij, thiab txhim kho cov khoom ruaj khov ntawm cov khoom.
3.3 Zaub Mov
Cov neeg hais daws cellulose feem ntau siv raws li cov thickeners, stabilizers, emulsifiers, thiab lwm yam hauv cov zaub mov. Nws tuaj yeem txhim kho qhov saj, viscosity thiab kev ntxhibosity thiab kev ntxhibosity thiab cov khoom noj khov, jelly, seasonings thiab lwm yam zaub mov.
3.4 Cov Chaw Muag Tshuaj
Nyob rau hauv lub chaw muag tshuaj, cellulose ether tsuas yog siv los tswj kev tso cov tshuaj, ntsiav tshuaj moulding thiab kev muab tshem tawm. Nws cov zoo thickening thiab adhesion tuaj yeem maj mam tso cov tshuaj hauv lub cev thiab nce kev ua tau zoo.
4. Kev tiv thaiv ib puag ncig thiab kev ceevfaj ntawm cellulose ether
Cellulose ether yog ib qho txiaj ntsig zoo ntawm polymer derivative nrog kev ua tau zoo ib puag ncig. Tom qab tau muab pov tseg, nws tuaj yeem yog ib qho kev txwv tsis zoo los txo kev ua qias tuaj rau ib puag ncig. Hauv kev tiv thaiv niaj hnub no ntawm kev tiv thaiv ib puag ncig, xws li maj mam tshuaj ntsuab, tau maj mam dhau los ua cov khoom ntxiv hauv ntau yam khoom.
Raws li cov khoom siv polymer nrog kev ua tau zoo, cellulose nyob rau hauv ntau daim teb tseem ceeb hauv kev tsim kho, thiab cov tshuaj, thiab cov tshuaj zoo thiab cov yam ntxwv zoo. Nrog kev nce qib ntawm kev tshawb fawb thiab thev naus laus zis thiab kev nce qib nce rau cov tshuaj ntsuab, daim ntawv thov cov kev cia siab ntawm cellulose yuav dav dav.
Lub Sijhawm Post: Feb-14-2025