HPMC MEA FA'AVAE

Hydroxypropyl Methylcellulose (HPMC) o se ether cellulose e maua mai le cellulose masani, faʻapitoa laupapa poʻo le cotton, e ala i se faasologa o vailaʻau.O se fa'amatalaga lautele lea o mea aoga ma meatotino a le HPMC:

1. Cellulose: O le Cellulose o le mea autu lea ile HPMC.O se polysaccharide fa'alenatura o lo'o i ai vaega o le kulukose faifaipea e feso'ota'i fa'atasi i filifili uumi.O le cellulose e fai ma ponaivi o le HPMC ma maua ai le faʻamaoni faʻavae.
2. Methylation: O le ivi o le cellulose e faʻapipiʻiina e ala i se gaioiga e taʻua o le methylation, lea e faʻafefe ai le methyl chloride ma le cellulose i luma o le alkali e faʻafeiloaʻi ai vaega methyl (-CH3) i luga o le filifili cellulose.O lenei faiga methylation e taua mo le faʻaleleia o le solubility vai ma isi meatotino o le cellulose.
3. Hydroxypropylation: I le faaopoopo atu i le methylation, hydroxypropyl vaega (-CH2CHOHCH3) e mafai foi ona faʻafeiloaʻi i luga o le filifili cellulose e ala i le hydroxypropylation.O lenei mea e toe faʻaleleia atili ai meatotino o le cellulose, faʻaleleia atili le taofiofia o le vai, mafai ona fai ata, ma isi uiga.
4. Etherification: O le faʻaofiina o vaega methyl ma hydroxypropyl i luga o le filifili cellulose ua taʻua o le etherification.Etherification e suia ai le fausaga kemikolo o le cellulose, e mafua ai le faʻavaeina o le HPMC ma mea faʻapitoa e talafeagai mo faʻaoga eseese.
5. Meatotino Faaletino: O le HPMC e masani lava o le pa'epa'e i le pa'epa'e, e leai se manogi, ma e leai se tofo.E so'a i le vai malulu ma fau ni vaifofo manino pe laititi le pala e fa'atatau i le fa'atonuga ma le togi.O lo'o fa'aalia e le HPMC le fa'atumauina lelei o le vai, mafiafia, fai ata, ma mea e fai i luga, ma fa'atauaina i le tele o alamanuia, e aofia ai faufale, vaila'au, mea'ai, ma mea teuteu.

I le aotelega, o mea autu i totonu o le HPMC o le cellulose, methyl chloride (mo le methylation), ma le propylene oxide (mo le hydroxypropylation), faʻatasi ai ma le alkali catalysts ma isi faʻaopoopoga faʻaaogaina i le gaosiga o gaosiga.O nei mea e fa'aogaina e fa'aosoina ai fa'ama'i e maua ai le HPMC fa'atasi ai ma mea totino fa'apitoa e fa'afetauia mana'oga o fa'aoga eseese.