Motsoako o sa tebang, o phethang karolo ea bohlokoa ho ntlafatseng ts'ebetso ea ho aha seretse se omeletseng, o etsa chelete e fetang 40% ea theko ea thepa seretseng se omeletseng. Bongata ba li-admixtures 'marakeng oa lehae li fanoa ke bahlahisi ba tsoang kantle ho naha, mme litekanyetso tsa litšupiso tsa lihlahisoa le tsona li fanoa ke barekisi. Litsenyehelo tsa sehlahisoa sa seretse se omeletseng se ntse se le holimo ka hona, 'me ho thata ho tsebahatsa mabone a tloaelehileng le seretse sa plaster ka bongata le mefuta e mengata. Lihlahisoa tsa 'maraka tsa maemo a holimo li laoloa ke lik'hamphani tsa linaha tse ling,' me baetsi ba seretse se omeletseng ba na le phaello e tlaase le theko e tlaase; ts'ebeliso ea li-admixtures ha e na lipatlisiso tse hlophisitsoeng le tse lebisitsoeng, 'me e latela ka bofofu liforomo tsa kantle ho naha. Mona, seo re se arolelanang le uena ke hore, karolo ea hydroxypropyl methylcellulose ke efe metsoakong e tloaelehileng ea seretse se omileng?
Hydroxypropyl methylcellulose ke mofuta oa cellulose oo tlhahiso le tšebeliso ea tsona li ntseng li eketseha ka potlako lilemong tsa morao tjena. Hydroxypropyl methylcellulose e entsoe ka k'hothone e hloekisitsoeng ka mor'a phekolo ea alkalization, e sebelisa propylene oxide le methyl chloride e le li-etherification agents , cellulose e se nang ionic e tsoakiloeng e entsoeng ka letoto la liketso. Tekanyo ea ho nka sebaka ka kakaretso ke 1.2 ~ 2.0. Thepa ea eona e fapane ho latela karo-karolelano ea litaba tsa methoxyl le litaba tsa hydroxypropyl. Litšobotsi tsa hydroxypropyl methylcellulose ke tse latelang:
1. Hydroxypropyl methylcellulose e qhibiliha habonolo metsing a batang, 'me e tla kopana le mathata a ho qhibiliha metsing a chesang. Empa mocheso oa eona oa gelation metsing a chesang o phahame haholo ho feta oa methyl cellulose. Ho qhibiliha ha metsi a batang ho boetse ho ntlafala haholo ha ho bapisoa le methyl cellulose.
2. The viscosity ea hydroxypropyl methylcellulose e amana le boima ba eona ba molek'hule. Ha boima ba limolek'hule bo le boholo, ho na le viscosity e phahameng. Mocheso o boetse o ama viscosity ea eona, ha mocheso o ntse o eketseha, viscosity e fokotseha. Leha ho le joalo, tšusumetso ea viscosity ea eona e phahameng le mocheso o tlase ho feta oa methyl cellulose. Tharollo ea eona e tsitsitse ha e bolokiloe mocheso oa kamore.
3. Ho boloka metsi a hydroxypropyl methylcellulose ho itšetlehile ka palo ea eona ea ho eketsa, viscosity, joalo-joalo, 'me tekanyo ea eona ea ho boloka metsi tlas'a chelete e tšoanang ea ho eketsa e phahame ho feta ea methyl cellulose.
4. Hydroxypropyl methylcellulose e tsitsitse ho acid le alkali, 'me tharollo ea eona ea metsi e tsitsitse haholo ka har'a pH = 2 ~ 12. Caustic soda le metsi a lime ha li na phello e fokolang ts'ebetsong ea eona, empa alkali e ka potlakisa ho qhibiliha ha eona 'me ea eketsa viscosity ea eona hanyenyane. Hydroxypropyl methylcellulose e tsitsitse ho matsoai a tloaelehileng, empa ha motsoako oa motsoako oa letsoai o phahame, viscosity ea hydroxypropyl methylcellulose tharollo e atisa ho eketseha.
5. Hydroxypropyl methylcellulose e ka kopanngoa le li-polymers tse qhibilihang ka metsing ho etsa tharollo e tšoanang le e phahameng ea viscosity. Joalo ka joala ba polyvinyl, starch ether, boka ba meroho, joalo-joalo.
6. Hydroxypropyl methylcellulose e na le khanyetso e ntle ea enzyme ho feta methylcellulose, 'me monyetla oa ho senyeha ha enzymatic ea tharollo ea eona o tlase ho feta oa methylcellulose.
7. Ho khomarela ha hydroxypropyl methylcellulose mohahong oa seretse ho phahame ho feta methylcellulose.
Nako ea poso: May-09-2023