Hydroxypropyl methylcellulose (HPMC), cellulose mata, e mafai ona faamamaina cotton po o laupapa pulp, e matua tatau lava ona tuʻimomomo i luma o alkalization po o le taimi o alkalization, ma o le tuʻimomomoina e ala i le malosi faʻainisinia Faʻaumatia le fausaga faʻapipiʻi o cellulose mea mata e faʻaitiitia ai le tikeri o le. crystallinity ma polymerization, faateleina lona eria i luga, lea e faaleleia atili ai le avanoa ma le gafatia o le tali atu o le tali atu i vaega hydroxyl tolu i luga o le vaega mama kulukose o le macromolecule cellulose.
Hydroxypropyl methylcellulose (HPMC) o loʻo faʻaaogaina e avea ma mea e gaosia ai le suauʻu, lea e mafai ona iloa ai le faʻaaogaina o le suka atoa, faʻaleleia le faʻaogaina o meafaitino, faʻaitiitia le aofaʻi o meaʻai i totonu o le susu faʻafefe, ma faʻaitiitia le tau o vai otaota. togafitiga. O lenei hydroxypropyl methylcellulose O uiga o le methylcellulose e faʻamalosia i le faʻamalosia o le faʻaogaina o le batch, fed-batch ma le faʻaauau pea o le faʻagasologa o le fermentation, aloese mai se faʻasologa o faʻafitauli e pei o le puleaina o le tuʻufaʻatasia o le ala ma le faʻafefeteina fua; e fesoasoani foi i le faatonutonuina o le faagasologa o le fermentation. Talu ai o le faatinoga o le hydroxypropyl methylcellulose (HPMC) e tutusa ma isi ethers soluble vai, e mafai ona faʻaaogaina i le latex vali ma vai-soluble resin vaega vali e avea o se sui fai ata tifaga, mafiafia, emulsifier ma stabilizer, ma isi. lelei le ofuina o le teteʻe, faʻapipiʻiina ma faʻapipiʻi, ma ua faʻaleleia atili le vevesi i luga, mautu i le acid ma le alkali, ma le fetaui i pigments metallic.
Hydroxypropyl methylcellulose (HPMC) ei ai sona aafiaga lelei e pei o se mafiafia mo pa'epa'e vai-fa'avae polyvinyl acetate vali. O le maualuga o le suitulaga o le cellulose ether ua faʻateleina, ma faʻateleina foi le tetee atu i siama siama.
E ui o le etherification synthesis mataupu faavae o le hydroxypropyl methyl cellulose (HPMC) e le faigata, e tatau ona alkalized, mea mata pulverized, ma alkalized. O siosiomaga taʻitasi o le etherification, solvent recovery, centrifugation, fufuluina 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. O mea faigaluega fesoasoani ma meafaigāluega fa'atonutonu o ni fa'amautinoaga lelei mo le fa'amautuina o le lelei o oloa ma fa'amoemoega o gaosiga.
Taimi meli: Tes-15-2022