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Hydroxypropyl methyl cellulose (HPMC), o mea mataselulosa, e mafai ona fa'amamāina le cotton po'o le pulu laupapa. E mana'omia le fa'apalapala a'o le'i faia po'o le taimi fo'i o le fa'agasologa ole alkalization. O le pulverization e faia i le malosi faʻainisinia. Faʻaumatia le fausaga faʻapipiʻi o meafaitino mata e faʻaitiitia ai le tioata ma le polymerization tikeri ma faʻateleina lona vaega i luga, ma faʻaleleia atili ai le faʻaogaina ma le gaioiga faʻainisinia o le reagents i vaega hydroxyl e tolu i luga o le cellulose macromolecular glucose ring base.

Hydroxypropyl methyl cellulose (HPMC)e faʻaaogaina e avea ma meaʻai e gaosia ai le suauʻu, lea e mafai ona iloa ai le faʻaaogaina o le suka atoa, faʻaleleia le faʻaogaina o meafaitino mata, faʻaitiitia le aofaʻi o mea e totoe i le suauʻu faʻafefete, ma faʻaitiitia le tau o togafitiga otaota. O uiga omethyl cellulosee fa'amalieina i le fa'asilisiliina o le fa'aputuga, faga-fa'amea ma fa'aauau pea le fa'agasologa o le fa'agasologa, aloese mai se fa'asologa o fa'afitauli e pei o le pulea o le tu'ufa'atasiga o le ala ma le fua fa'afefete; i le taimi lava e tasi, e aoga foi i le faatonutonuina o le faagasologa o le fermentation. Aua o meatotino ahydroxypropyl methyl cellulose (HPMC)e tutusa ma isi ethers e mafai ona solu vai, e mafai ona faʻaaogaina e fai ma sui o le ata tifaga, mafiafia, emulsifier ma stabilizer i latex coatings ma vai-soluble resin coating vaega, e mafai ai ona fai faʻaofuofu O le ata tifaga e lelei le abrasion teteʻe, faʻavasegaina. meatotino ma faʻapipiʻi, ma ua faʻaleleia atili le vevesi i luga, mautu i le acid ma le alkali, ma le fetaui ma pigments metallic.

Hydroxypropyl methyl cellulose (HPMC)ei ai se aafiaga lelei e pei o se mafiafia mo paʻepaʻe vai-faavae polyvinyl acetate coatings. Le tikeri o le suitulaga oeteru seluloseua faateleina, ma ua faateleina foi le tetee atu i siama ma tafia.

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E ui lava o le mataupu faavae o le etherification synthesis o le hydroxypropyl methylcellulose (HPMC) e le faigata, o le alkalization, mea mata e nutimomoia, ma alkalization. O siʻosiʻomaga eseese o le etherification, solvent recovery, centrifugal separation, fufulu ma faʻamago e aofia ai le tele o tekinolosi autu ma le malamalama tele.

Mo ituaiga eseese o oloa, o siosiomaga taʻitasi o loʻo i ai tulaga sili ona lata mai, e pei o le vevela, taimi, mamafa ma le faʻatonutonuina o mea. Meafaigaluega fesoasoani ma meafaifaaili e pulea o se faʻamautinoaga faʻalagolago ma aoga mo le faʻamautuina o le lelei o oloa ma le faʻaogaina o le gaosiga faʻalagolago.

O uiga o oloa ohydroxypropyl methyl cellulose:

1. Meatotino: O lenei oloa o se paʻepaʻe paʻepaʻe, ma e leai se manogi, leai se tofo ma e le oona.

2. Fa'atumauina le vai: Ona o lenei oloa e mafai ona mitiia vai i le tele o taimi e sili atu le mamafa nai lo ia lava. Fa'atumauina le maualuga o le vai i totonu o sima, gypsum, vali ma isi oloa.

3. O lenei oloa e mafai ona faʻamavaeina i totonu o le vai malulu e fausia ai se soluse viscous manino.

4. Dissolution in organic solvents: Ona o loʻo i ai se aofaʻi o genes hydrophobic, o lenei oloa e mafai ona faʻamavaeina i nisi solvents organic, ma e mafai foi ona faʻamavaeina i soʻo faʻafefiloi o vai ma mea faʻalaʻau.

5. Tete'e masima: Talu ai o lenei oloa o se non-ionic ma non-polyelectrolyte, e fai si mautu i vaifofo vai o masima uʻamea po electrolytes organic. I le tulaga o le tele naua o le electrolyte, e mafai ona mafua ai le gelation poʻo le timuga.

6. Fa'asagaga i luga: O le vaifofo vai o lenei oloa o lo'o i ai le gaioiga i luga.

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  • Taimi meli: Nov-29-2021