O le a le Cellulose ethers

Cellulose ethers o se aiga o vailaʻau vailaʻau e maua mai i le cellulose, o se polymer masani e maua i totonu o puipui sela o laau. O nei mea e maua mai e ala i suiga faʻa-kemikolo o molelaʻau cellulose e faʻalauiloa ai vaega faʻatino eseese, e mafua ai le tele o mea totino ma faʻaoga. O le cellulose ethers e masani ona faʻaaogaina i pisinisi e pei o le fausiaina, vailaʻau, meaʻai, mea teuteu, ma le tausiga a le tagata lava ia ona o latou natura faʻapitoa ma mea aoga. O nisi nei o ituaiga masani o cellulose ethers ma o latou faʻaoga:

1. Methyl Cellulose (MC):
   • Methyl cellulose e gaosia e ala ile togafitia ole cellulose ile methyl chloride.
   • E so'a i le vai ma fau ni vaifofo manino ma viscous.
   • O le MC e faʻaaogaina e fai ma mea mafiafia, faʻapipiʻi, ma faʻamautu i mea faufale (faʻataʻitaʻiga, sima faʻapipiʻi faʻapipiʻi, faʻapipiʻi gypsum), meaʻai, vailaʻau, ma mea e tausia ai le tagata lava ia.
2. Hydroxyethyl Cellulose (HEC):
   • O le hydroxyethyl cellulose o loʻo faʻapipiʻiina e ala i le taliina o le cellulose ma le ethylene oxide e faʻafeiloaʻi ai vaega hydroxyethyl.
   • E so'a i le vai ma fau ni vaifofo manino ma viscous fa'atasi ai ma mea lelei e taofi ai le vai.
   • O le HEC e masani ona faʻaaogaina e fai ma mea mafiafia, faʻafouga o le rheology, ma sui faʻapipiʻi ata i vali, faʻapipiʻi, mea tau tausiga a le tagata lava ia, ma vailaʻau.
3. Hydroxypropyl Methyl Cellulose (HPMC):
   • Hydroxypropyl methyl cellulose e gaosia e ala i le tuʻuina atu o le hydroxypropyl ma le methyl vaega i luga o le cellulose tua.
   • O lo'o fa'aalia ai meatotino e tutusa uma ma le methyl cellulose ma le hydroxyethyl cellulose, e aofia ai le solubility o le vai, mafai ona fai ata, ma le taofiofia o le vai.
   • O le HPMC o lo'o fa'aaogaina lautele i mea faufale (fa'ata'ita'iga, mea fa'apipi'i ta'ele, sima fa'avae, fa'atūlagaina fa'atasi), fa'apea fo'i i vaila'au, mea'ai, ma mea tau le tagata lava ia.
4. Carboxymethyl Cellulose (CMC):
   • Carboxymethyl cellulose e maua mai le cellulose e ala i le togafitia i le sodium hydroxide ma le monochloroacetic acid e faʻafeiloaʻi ai vaega carboxymethyl.
   • E so'a i le vai ma fau ni vaifofo manino, viscous ma sili ona mafiafia, fa'amautu, ma fa'amautu vai.
   • O le CMC e masani ona faʻaaogaina e avea o se mafiafia, faʻapipiʻi, ma le rheology modifier i mea taumafa, vailaʻau, ie, pepa, ma nisi mea faufale.

O nisi ia o ethers cellulose e masani ona faʻaaogaina, e tofu ma mea faʻapitoa ma faʻaoga i pisinisi eseese. E mafai fo'i ona iai isi ethers cellulose fa'apitoa, fa'atatau i mana'oga fa'apitoa i fa'aoga eseese.