Cov khoom ntawm hydroxyethyl cellulose

Hydroxyethyl cellulose (HEC) yog cov dej tsis muaj dej-soluble polymer dav siv hauv ntau daim teb. Nws yog feem ntau tsim los ntawm tshuaj lom neeg cov tshuaj ntsig xws li alkalization thiab etherification ntawm ntuj cellulose. Nws muaj cov khoom siv lub cev tshwj xeeb thiab tshuaj lom neeg, ua rau nws muaj cov khoom siv tsis tau hauv ntau daim ntawv thov.

1.. Cov qauv tshuaj thiab hnyav hnyav
Cov txheej txheem theem pib ntawm hydroxyethyl cellulose yog lub cellulose saw muaj cov roj halucose. Ntawm qee qhov chaw hydroxyl ntawm nws cov molecular chart, hydroxyethyl (-ch2ch2oh) tau qhia los ntawm Ethegation. Vim tias kev qhia ntawm cov pab pawg no, hydroxyethyl cellulose yog hydrophilic thiab muaj solubility zoo dua li cov cellulose zoo dua. Raws li cov ntawv thov sib txawv, tus neeg kawm qib siab hloov chaw (MS) Feem ntau, cov mis nyuj hnyav ntau ntawm HEC yog qhov dav, xws li los ntawm ntau lab tus ntawm daltons, uas ua rau nws nthuav tawm cov khoom sib txawv hauv cov kua aqueous.

2. Dej solubility thiab kev coj ua tus cwj pwm
Vim tias nws cov yam ntxwv tsis-ionic, hydroxyethyl cellulose tuaj yeem yaj hauv ob qho dej txias thiab dej kub kom tsim cov tshuaj pleev pob tshab. Nws qhov kev sib cais dhau ntawm txoj kev ua kom hnyav, qib degree hloov chaw thiab ntsuas kub ntawm cov dej. Siab molecular hnyav hom hec yaj dua qeeb tab sis cov kev daws teeb meem tseem ceeb heev, thaum cov khoom siv vanechous tsawg dua tab sis tsim cov viscosities. Vim yog cov kev daws teeb meem tsis-ionic ntawm nws txoj kev daws teeb meem, HEC muaj qhov ntsuas hluav taws xob zoo thiab tuaj yeem tswj hwm nws lub xeev yaj thiab ruaj khov tshaj li qhov dav dav (2-12).

3. Thickening thiab rheological cov yam ntxwv
Ib qho ntawm cov khoom lag luam tshaj plaws ntawm HEC yog nws lub peev xwm thickening. Ntawm cov kev sib haum xeeb qis (0.5% -2%), cov kev daws teeb meem ntawm HEtudoplastic, uas txhais tau tias yog qhov muaj txiaj ntsig zoo rau cov ntawv thov xws li cov txheej txheem thiab emulsions. Ib qho ntxiv, HEC tseem tuaj yeem ua haujlwm Synergistically nrog lwm cov thickeners xws li carboxymethyl cellulose (cmshan thiab xanthan ntawm cov hniav los txhim kho cov nyhuv tuab lossis kho cov rheology.

4. Kev ruaj khov thiab kev sib raug zoo
HEC muaj tshuaj txaus kom ruaj khov thiab tsis yog muaj feem rau kev ua phem lossis kev hloov tshuaj lom neeg nyob rau feem ntau. Nws cov kev daws teeb meem tuaj yeem zam ntau cov electrolytes thiab cov lus dav dav ntau ntau, uas ua rau nws ruaj khov ib puag ncig. Ib qho ntxiv, HEC tseem tau tshaj ntau lwm yam tshuaj xws li surfactants, polymers, inorganic ntsev, thiab nws feem ntau siv hauv cov ntawv tsim kev ruaj khov thiab ua tuab.

5. Daim Ntawv Thov Cheeb Tsam
Vim nws cov khoom tshwj xeeb, HEC tau siv dav hauv ntau thaj teb. Cov hauv qab no yog qee cov ntawv teev npe:

Cov ntaub ntawv hauv tsev: hauv cov xim pleev xim, pleev xim, putty hmoov, thiab lwm yam, duab dhos ua si thiab stabilizer kom txhim kho kev tsim kho thiab cov khoom lag luam tiav.

Cov roj teeb tawm: hauv cov roj kev lag luam, HEC tau siv hauv kev npaj cov roj thiab cov kua dej ua tiav thiab ua kom muaj kua ntawm cov av nkos thiab kev sib tsoo zoo.

Cov tshuaj pleev ib ce thiab cov khoom siv saib xyuas tus kheej: HEC tau dav siv hauv cov khoom lag luam ntawm tus kheej xws li cov ntaub qhwv ntsej muag, pleev xim rau cov khoom siv thiab siv cov khoom lag luam.

Kws Tshuaj Kho Mob: Hauv cov tshuaj raug, HEC yog siv los ua cov tshuaj tiv thaiv me me, cov neeg sawv cev rau cov tshuaj lom zem los pab tswj cov tshuaj tawm hauv lub cev.

Kev lag luam khoom noj khoom haus: txawm hais tias siv hauv cov khoom me me, HEC tuaj yeem siv ua khoom noj ntxiv los kho cov viscosity thiab saj ntawm cov zaub mov.

6. Kev tiv thaiv ib puag ncig thiab kev nyab xeeb
HEC yog lub ntuj cellulose derivative nrog zoo biodegrentability, yog li nws muaj kev cuam tshuam me ntsis rau ib puag ncig tom qab siv. Ib qho ntxiv, HEC yog suav hais tias yog tshuaj nyab xeeb thiab siv dav hauv cov khoom uas tau sib cuag nrog tib neeg lub cev, xws li tshuaj pleev ib ce, tshuaj noj. Txawm li cas los xij, thaum kev lag luam tsim thiab siv, coj cov cai kev nyab xeeb yuav tsum tau ua raws li tiv thaiv kev txob txob uas yuav tshwm sim los ntawm kev nqus tau lossis ntev.

7. Cia thiab siv cov kev ceev faj
Hydroxyethyl cellulose yuav tsum muab cia rau hauv ib puag ncig qhuav thiab txias kom tsis txhob ya raws thiab agglomeration. Thaum siv, nws yuav tsum tau ntxiv rau dej maj mam thiab tusyees kom tsis txhob agglomeration tshwm sim los ntawm kev ntxiv cov nyiaj ntau ntawm ib zaug. Nyob rau tib lub sijhawm, txij li nws yuav siv sij hawm ib lub sijhawm kom yaj, nws yog feem ntau tsim nyog tawm mus rau ib lub sijhawm tom qab dissolving kom paub tseeb tias tiav kev sib cav thiab ruaj khov viscosity.

Vim nws cov dej ua kom zoo, ua kom muaj zog, ruaj khov thiab sib zog, hydroxyethyl cellulose tau dhau los ua ntau yam kev lag luam. Nrog kev txhim kho kev ua lag luam kev ua lag luam kev ua lag luam, daim ntawv thov tau dav ntawm HEC yuav txuas ntxiv kom nthuav, muab cov kev daws teeb meem zoo dua rau ntau yam kev lag luam.