Hydroxypropyl methylcellulose, e bitsoang: HPMC kapa MHPC. Ponahalo ke phofo e tšoeu kapa e tšoeu; tšebeliso e kholo ke e le dispersant tlhahiso ea polyvinyl chloride, 'me ke moemeli ea ka sehloohong ea thusang bakeng sa ho lokisetsa PVC ka ho emisa polymerization. Ts'ebetsong ea kaho ea indasteri ea kaho, e sebelisoa haholo kahong ea mechini joalo ka moaho oa marako, ho lila, ho roala, joalo-joalo; haholo-holo kahong ea mokhabiso, e sebelisoa ho maneha lithaele tsa ceramic, 'mabole le mekhabiso ea polasetiki. E na le matla a holimo a tlamahano 'me e ka fokotsa bongata ba samente. . E sebelisoa e le motenya indastering ea pente, e ka etsang hore lera le khanye le ho tiea, le thibele ho tlosoa ha phofo, le ntlafatse ts'ebetso ea boemo, joalo-joalo.
Ka seretse sa samente le gypsum-based slurry, hydroxypropyl methylcellulose haholo-holo e bapala karolo ea ho boloka metsi le ho teteaneng, e ka ntlafatsang ka katleho matla a momahaneng le ho hanyetsa ho tsuba ha slurry.
Lintho tse kang mocheso oa moea, mocheso le lebelo la khatello ea moea li tla ama sekhahla sa ho fetoha ha metsi seretseng sa samente le lihlahisoa tse thehiloeng ho gypsum. Ka hona, ka linako tse fapaneng tsa selemo, ho na le phapang e itseng molemong oa ho boloka metsi oa lihlahisoa tse nang le palo e lekanang ea hydroxypropyl methylcellulose e kentsoeng.
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 tlas'a maemo a mocheso o phahameng ke pontšo ea bohlokoa ho khetholla boleng ba methyl cellulose ether.
Lihlahisoa tse ntle tsa hydroxypropyl methylcellulose 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 na le ts'ebetso e ntle haholo. Lihlopha tsa eona tsa methoxy le hydroxypropoxy li ajoa ka ho lekana hammoho le ketane ea molek'hule ea cellulose, e ka ntlafatsang bokhoni ba liathomo tsa oksijene holim'a li-bond tsa hydroxyl le ether ho kopana le metsi ho etsa li-hydrogen bond. , e le hore metsi a sa lefelloeng e be metsi a tlamiloeng, e le hore a laole ka katleho mouoane oa metsi o bakoang ke mocheso o phahameng oa mocheso, le ho finyella ho boloka metsi a mangata.
Metsi a hlokeha bakeng sa hydration e le hore ho be le lisebelisoa tsa samente tse kang samente le gypsum. Palo e nepahetseng ea HPMC e ka boloka mongobo ka har'a seretse nako e telele e lekaneng e le hore mokhoa oa ho beha le ho thatafatsa o tsoele pele.
Palo ea HPMC e hlokahalang ho boloka metsi a lekaneng e itšetlehile ka:
1. The absorbency ea lera motheo
2. Sebopeho sa seretse
3. Seretse lera botenya
4. Tlhokahalo ea metsi ea seretse
5. Nako ea ho beha thepa ea gelling
Hydroxypropyl methylcellulose ea boleng bo holimo e ka qhalakanngoa ka mokhoa o ts'oanang le ka katleho ka seretse sa samente le lihlahisoa tse thehiloeng ho gypsum, 'me ea phuthela likaroloana tsohle tse tiileng,' me ea etsa filimi ea ho koloba, 'me mongobo o botlaaseng o lokolloa butle butle ka nako e telele. karabelo ea hydration ka thepa ea inorganic gelling ho netefatsa matla a tlamahano le matla a hatellang a thepa.
Ka hona, mohahong o phahameng oa mocheso oa lehlabula, e le ho finyella phello ea ho boloka metsi, hoa hlokahala ho eketsa lihlahisoa tsa boleng bo phahameng ba HPMC ka bongata bo lekaneng ho ea ka foromo, ho seng joalo, ho tla ba le hydration e sa lekaneng, matla a fokotsehileng, ho phunyeha, ho pata. le ho tsholla ho bakoang ke ho omisa haholo. mathata, empa hape eketsa bothata ba kaho ea basebetsi. Ha mocheso o theoha, palo ea metsi a HPMC e ekelitsoeng e ka fokotsoa butle-butle, 'me phello e tšoanang ea ho boloka metsi e ka finyelloa.
Nako ea poso: Jan-16-2023