Hydroxypropyl methylcelluloseHPMCke non-ionic cellulose ether e entsoeng ka selulose ea tlhaho ea polymer ka letoto la ts'ebetso ea lik'hemik'hale.Ke phofo e tšoeu e sa nkheng, e sa latsoeheng le e se nang chefo, e kokomohang metsing a batang ho ea ho motsoako o hlakileng kapa o fokolang oa colloidal.E na le thepa ea ho tiisa, ho tlama, ho qhalakanya, emulsifying, filimi-forming, suspending, adsorbing, gelling, surface-active, ho boloka mongobo le colloid e sireletsang.Hydroxypropyl methylcellulose, methylcellulose e ka sebelisoa ho haha, indasteri ea ho roala, resin ea maiketsetso, indasteri ea ceramics, meriana, lijo, masela, temo, lik'hemik'hale tsa letsatsi le letsatsi le liindasteri tse ling.
Phello ea ho boloka metsi le molao-motheo oa hydroxypropyl methylcellulose HPMC
Cellulose ether HPMC haholo-holo e bapala karolo ea ho boloka metsi le ho tiea ka seretse sa samente le seretse se thehiloeng ho gypsum, se ka ntlafatsang ka katleho momahano le ho hanyetsa sag ea slurry.
Lintho tse kang mocheso oa moea, mocheso le khatello ea moea li tla ama sekhahla sa ho fetoha ha metsi ka har'a seretse sa samente le lihlahisoa tse thehiloeng ho gypsum.Ka hona, ka linako tse fapaneng tsa selemo, ho na le liphapang tse mabapi le phello ea ho boloka metsi ea lihlahisoa tse nang le palo e lekanang ea HPMC e ekelitsoeng.Moahong o ikhethileng, phello ea ho boloka metsi ea slurry e ka fetoloa ka ho eketsa kapa ho fokotsa palo ea HPMC e kentsoeng.Ho boloka metsi a methyl cellulose ether ka mocheso o phahameng ke sesupo sa bohlokoa ho khetholla boleng ba methyl cellulose ether.Lihlahisoa tse ntle ka ho fetisisa tsa HPMC li ka rarolla bothata ba ho boloka metsi tlas'a mocheso o phahameng.Linakong tsa mocheso o phahameng, haholo-holo libakeng tse chesang le tse omileng le kaho ea lera le tšesaane lehlakoreng le chabileng, HPMC ea boleng bo holimo ea hlokahala ho ntlafatsa ho boloka metsi a seretse.HPMC ea boleng bo holimo, e nang le ts'ebetso e ntle haholo, lihlopha tsa eona tsa methoxy le hydroxypropoxy li arolelitsoe ka mokhoa o lekanang hammoho le ketane ea molek'hule ea cellulose, e ka ntlafatsang bokhoni ba liathomo tsa oksijene holim'a hydroxyl le ether bonds ho kopana le metsi ho theha likamano tsa hydrogen , metsi a sa lefelloeng a fetoha metsi a tlamiloeng, e le ho laola ka katleho mouoane oa metsi o bakoang ke mocheso o phahameng oa mocheso le ho finyella ho boloka metsi a phahameng.
Selulose ea boleng bo phahameng ea HPMC e ka qhalakanngoa ka mokhoa o ts'oanang le ka katleho ka lihlahisoa tsa samente le lihlahisoa tse thehiloeng ho gypsum, 'me e koahela likaroloana tsohle tse tiileng,' me e etsa filimi ea ho kolobisa, 'me mongobo o botlaaseng o lokolloa butle-butle ka nako e telele.The hydration karabelo ea lintho tse bonahalang coagulating etsahala, ka tsela eo ho etsa bonnete ba bonding matla le compressive matla a thepa.Ka hona, ka mocheso o phahameng oa lehlabula kaho, e le ho finyella phello ea ho boloka metsi, hoa hlokahala ho eketsa lihlahisoa tsa boleng bo phahameng ba HPMC ho ea ka foromo, ho seng joalo, ho tla ba le ho haella ha metsi, ho fokotsa matla, ho phunyeha, ho pata le ho oa. e bakoang ke ho omisa kapele haholo.E boetse e eketsa bothata ba kaho bakeng sa basebetsi.Ha mocheso o ntse o fokotseha, palo ea tlatsetso ea HPMC e ka fokotsoa butle-butle, 'me phello e tšoanang ea ho boloka metsi e ka finyelloa.
Ho boloka metsi a hydroxypropyl methylcellulose HPMC sehlahisoa ka bosona hangata ho angoa ke lintlha tse latelang:
1. Cellulose ether HPMC homogeneity
HPMC e sebetsanang ka mokhoa o ts'oanang e na le kabo e tšoanang ea lihlopha tsa methoxy le hydroxypropoxy le ho boloka metsi a phahameng.
2. Cellulose ether HPMC mocheso oa mocheso oa gel
Ha mocheso oa gel o futhumatsang o phahame, sekhahla sa ho boloka metsi se phahame;ho seng joalo, sekhahla sa ho boloka metsi se ka tlase.
3. Cellulose ether HPMC viscosity
Ha viscosity ea HPMC e eketseha, tekanyo ea ho boloka metsi e boetse e eketseha;ha viscosity e fihla boemong bo itseng, ho eketseha ha sekhahla sa ho boloka metsi ho atisa ho ba bonolo.
4. Cellulose ether HPMC palo ea tlatsetso
Ha palo e ekelitsoeng ea cellulose ether HPMC e le kholoanyane, e phahamisa sekhahla sa ho boloka metsi le phello e ntle ea ho boloka metsi.Boemong ba 0.25-0.6%, tekanyo ea ho boloka metsi e eketseha ka potlako ka keketseho ea palo ea ho eketsa;ha palo ea tlatsetso e ntse e eketseha, mokhoa o ntseng o eketseha oa sekhahla sa ho boloka metsi o ea butle.
Nako ea poso: Oct-20-2022