Selulosa Eteru

Cellulose ethere faia mai le cellulose e ala i le etherification tali a se tasi pe sili atu etherification agents ma mago olo olo. E tusa ai ma le eseesega o vailaʻau faʻasolosolo o sui ether, e mafai ona vaevaeina cellulose ethers i anionic, cationic ma nonionic ethers. Ionic cellulose ethers e masani ona aofia aicarboxymethyl cellulose eter (CMC); non-ionic cellulose ethers tele lava aofia aimethyl cellulose eter (MC),hydroxypropyl methyl cellulose eter (HPMC)ma le hydroxyethyl cellulose ether.chlorine eter (HC)ma faapena atu ai lava. O ethers e le o ni ionic e vaevaeina i ethers soluble ma suau'u-soluble ethers, ma ethers e le mafai ona solu i le vai e masani ona faʻaaogaina i oloa sima. I le i ai o ions calcium, o le ionic cellulose ether e le mautu, o lea e seasea faʻaaogaina i mea faʻamago faʻafefiloi faʻafefiloi e faʻaogaina ai le sima, slaked lime, ma isi mea faʻapipiʻi. Ole ethers ole cellulose e mafai ona solu ile vai e masani ona faʻaaogaina ile fale gaosi mea fau fale ona o lo latou faʻamautu faʻamautu ma le taofiofia o vai.

Meatotino Kemisi o Cellulose Eteru

O ether cellulose ta'itasi e iai le fa'avae fa'avae o le cellulose—fa'asologa o le Anhydroglucose. I le faagasologa o le gaosia o le cellulose ether, o le alava cellulose e muamua faʻamafanafanaina i totonu o se vaifofo alkaline, ona togafitia ai lea ma se mea e faʻafefe ai. O le fibrous reaction product e fa'amama ma fa'a'ele'ele'ele'ele e fai ai se pa'u toniga fa'atasi ai ma se mea lelei.

I le faagasologa o le gaosiga o le MC, naʻo le methyl chloride e faʻaaogaina e fai ma sui eterification; i le faʻaopoopoga i le methyl chloride, o loʻo faʻaaogaina foi le propylene oxide e maua ai vaega faʻapipiʻi hydroxypropyl i le gaosiga o le HPMC. Eseese cellulose ethers e eseese methyl ma hydroxypropyl substitution ratios, lea e aafia ai le fetaui lelei ma vevela gelation vevela o cellulose eter fofo.