Gulu la Etere wa Cellulose
Ma cellulose ether ndi liwu lodziwika bwino lazinthu zingapo zopangidwa ndi momwe alkali cellulose ndi etherifying agent pansi pazifukwa zina. Ma cellulose a alkali akasinthidwa ndi ma etherifying agents osiyanasiyana, ma cellulose ethers osiyanasiyana adzapezeka.
Malinga ndi ma ionization a zinthu zolowa m'malo, ma cellulose ether amatha kugawidwa m'magulu awiri: ionic (monga carboxymethyl cellulose) ndi nonionic (monga methyl cellulose).
Malinga ndi mtundu wa zolowa m'malo, cellulose ether imatha kugawidwa kukhala monoether (monga methyl cellulose) ndi ether yosakanikirana (monga hydroxypropyl methyl cellulose).
Malinga ndi kusungunuka kosiyanasiyana, imatha kugawidwa m'madzi (monga hydroxyethyl cellulose) ndi organic solvent solubility (monga ethyl cellulose).
Ma cellulose ethers osungunuka m'madzi omwe amagwiritsidwa ntchito mumatope osakanizika owuma amagawidwa kukhala ma ethers osungunula pompopompo komanso ogwiritsidwa ntchito pamtunda mochedwa-kusungunuka kwa cellulose ether.
Kodi kusiyana kwawo kuli kuti? Ndipo momwe mungasinthire bwino kuti ikhale yankho lamadzi la 2% poyesa kukhuthala?
Kodi chithandizo chapamwamba ndi chiyani?
Kodi pamakhala bwanji cellulose ether?
choyamba
Kuchiza pamwamba ndi njira yopangira nsalu pamwamba pa zinthu zoyambira ndi makina, thupi ndi mankhwala osiyana ndi maziko.
Cholinga cha mankhwala pamwamba pa mapalo ether ndi kuchedwetsa nthawi kaphatikizidwe mapadi etere ndi madzi kukwaniritsa pang'onopang'ono thickening zofunika za matope ena utoto, komanso kuonjezera dzimbiri kukana za mapadi etere ndi kusintha kusunga bata.
Kusiyanitsa pamene madzi ozizira amakonzedwa ndi 2% yankho lamadzimadzi:
The pamwamba mankhwala cellulose ether akhoza mwamsanga kumwazikana m'madzi ozizira ndipo si kophweka agglomerate chifukwa kukhuthala kwake pang'onopang'ono;
Ma cellulose ether popanda chithandizo chapamwamba, chifukwa cha ma viscosities ake othamanga, adzakhala owoneka bwino asanayambe kumwazikana m'madzi ozizira, ndipo amatha kukhala agglomeration.
Kodi mungakhazikitse bwanji ether yosapangidwa ndi cellulose?
1. Choyamba ikani mulingo wina wa cellulose ether wosapangidwa ndi pamwamba;
2. Kenaka yikani madzi otentha pafupifupi madigiri 80 Celsius, kulemera kwake ndi gawo limodzi mwa magawo atatu a voliyumu yamadzi yofunikira, kuti athe kutupa ndikubalalika;
3. Kenaka, pang'onopang'ono tsanulirani m'madzi ozizira, kulemera kwake ndi magawo awiri mwa magawo atatu a madzi otsala omwe amafunikira, pitirizani kusonkhezera kuti mukhale omata pang'onopang'ono, ndipo sipadzakhala agglomeration;
4. Potsirizira pake, pansi pa chikhalidwe cholemera chofanana, chiyikeni mumadzi osambira otentha nthawi zonse mpaka kutentha kutsika kufika madigiri 20 Celsius, ndiyeno kuyesa kwa viscosity kukhoza kuchitidwa!
Nthawi yotumiza: Feb-02-2023