Hydroxypropyl methylcellulose (HPMC) ke tlatsetso ea bohlokoa ho likhomaretsi tsa sejoale-joale tsa lithaele le metsoako ea lik'hemik'hale ea kaho.Lintho tsa eona tse nang le mesebetsi e mengata li ntlafatsa likarolo tsohle tsa mekhoa ea ho khomarela, ho thusa ho ntlafatsa ts'ebetso, ho boloka metsi, ho khomarela le ho sebetsa ka kakaretso.
Indasteri ea kaho e ntse e tsoela pele ho batla litharollo tse ncha ho ntlafatsa ts'ebetso le ho tšoarella ha thepa ea kaho.Har'a li-additives tse fapaneng tse sebelisoang ha ho etsoa lik'hemik'hale tsa kaho, hydroxypropyl methylcellulose (HPMC) e hohetse tlhokomelo ka lebaka la melemo ea eona e mengata ho li-adhesives tsa lithaele le metsoako ea lik'hemik'hale tsa kaho.HPMC e tsoa ho cellulose e nang le thepa e ikhethang e ka amang ts'ebetso ea likhomaretsi le ho ntlafatsa boleng ba merero ea kaho.Sepheo sa sengoloa sena ke ho hlahloba karolo le melemo ea HPMC ho li-adhesives tsa lithaele le metsoako ea lik'hemik'hale tsa kaho, ho hlakisa sebopeho sa eona sa lik'hemik'hale, mokhoa oa ts'ebetso le melemo eo e fanang ka eona indastering ea kaho.
1. Sebopeho sa lik'hemik'hale le thepa ea HPMC:
Hydroxypropyl methylcellulose (HPMC) ke semi-synthetic polymer e fetotsoeng ka lik'hemik'hale ho tloha selulose.E entsoe ka ho phekola cellulose ka propylene oxide le methyl chloride, ho hlahisa motsoako o nang le hydroxypropyl le methyl substituents (-OH le -CH3 lihlopha) tse khomaretsoeng mokokotlong oa cellulose.Tekanyo ea ho kenya sebaka (DS) ea lihlopha tsa hydroxypropyl le methyl e khetholla thepa ea HPMC, ho kenyelletsa le viscosity, solubility le botsitso ba mocheso.
HPMC e na le ho qhibiliha ha metsi ka tsela e babatsehang 'me e etsa tharollo e hlakileng le e hlakileng ha e hasane ka metsing.Leha ho le joalo, ho qhibiliha ha eona ho itšetlehile ka mocheso, 'me mocheso o phahameng o rata ho qhibiliha.Thepa ena e etsa hore HPMC e lokele ho sebelisoa meahong ea lik'hemik'hale tsa kaho moo litsamaiso tse thehiloeng metsing li atileng.Ho feta moo, HPMC e fana ka boitšoaro ba pseudoplastic tharollong, ho bolelang hore viscosity ea eona e fokotseha tlas'a khatello ea ho kuta, kahoo e nolofatsa ts'ebeliso le ho ntlafatsa ts'ebetso ea libopeho tsa sekhomaretsi.
2. Mokhoa oa ts'ebetso oa sekhomaretsi sa lithaele tsa ceramic:
Litaelong tsa sekhomaretsi sa lithaele, HPMC e sebetsa mesebetsi e fapaneng ka lebaka la sebopeho sa eona se ikhethang sa lik'hemik'hale le thepa.E 'ngoe ea mesebetsi ea eona e ka sehloohong ke ho sebetsa e le motenya, ho ntlafatsa ho tsitsa le ho sebetsa ha sekhomaretsi.Ka ho eketsa viscosity, HPMC e thusa ho thibela seretse sa sekhomaretsi hore se senyehe kapa se putlama, ho netefatsa tšireletso e nepahetseng le maqhama lipakeng tsa thaele le substrate.
HPMC e boetse e sebetsa e le sesebelisoa sa ho boloka metsi, se lumellang sekhomaretsi ho boloka mongobo o lekaneng nakong ea ho folisa.Thepa ena ke ea bohlokoa ho etsa bonnete ba hore hydration e nepahetseng ea lisebelisoa tsa cementitious ka har'a sekhomaretsi, ho khothalletsa maqhama a matla le ho fokotsa kotsi ea mapetsong a shrinkage.Ntle le moo, bokhoni ba ho ts'oara metsi ba HPMC bo thusa ho lelefatsa nako e bulehileng, ho lumella nako e lekaneng ea ho beha lithaele le ho li lokisa pele sekhomaretsi se seta.
HPMC e etsa filimi e tenyetsehang le e khomarelang ha e omisa, ka tsela eo e ntlafatsa thepa ea tlamahano ea sekhomaretsi sa lithaele.Filimi e sebetsa e le sekhomaretsi, e khothalletsang maqhama pakeng tsa lera la sekhomaretsi, lithaele le substrate.Ho ba teng ha HPMC ho matlafatsa matla a bond ka kakaretso le ho tšoarella ha ho kengoa ha lithaele, ho fokotsa monyetla oa ho thefula kapa ho theola nako.
3. Kameho ho metsoako ea lik'hemik'hale ea kaho:
Ntle le likhomaretsi tsa lithaele, HPMC e sebelisoa haholo mefuteng e fapaneng ea metsoako ea lik'hemik'hale ea kaho, ho kenyeletsoa seretse, li-plaster le li-grouts.Mehaho ea eona e nang le mesebetsi e mengata e etsa hore e be tlatsetso ea bohlokoa ho ntlafatsa ts'ebetso le ho tšoarella ha lisebelisoa tsena.Lirapeng, HPMC e sebetsa e le phetoho ea rheology, e laolang boitšoaro ba ho phalla le ho tsitsa ha motsoako.Sena se tiisa ts'ebeliso e ts'oanang le ts'ebetso e ntlafalitsoeng, e thusa ho beoa le ho fokotsa litšila tsa thepa.
HPMC e thusa ho ntlafatsa thepa ea ho ikemela ea metsoako ea fatše le lipeo tsa SCR, e leng ho lumellang hore ho be le sebaka se boreleli, se lekanang.Matla a eona a ho tšoara metsi a thibela motsoako ho omella pele ho nako, o khothalletsa phekolo e nepahetseng le ho fokotsa ho se phethahale ha holim'a metsi a kang mapetsong kapa mapetsong.Ho feta moo, HPMC e ntlafatsa ho khomarela le ho khomarela li-plaster le li-grouts, e leng se etsang hore ho be le liphetho tse matla le tse ntle.
Tšebeliso ea HPMC metsoakong ea lik'hemik'hale ea kaho e tsamaellana le lipheo tsa ts'ebetso tsa indasteri ea kaho.Ka ho ntlafatsa ts'ebetso le ho fokotsa tšebeliso ea thepa, HPMC e kenya letsoho ho sebetsa hantle ha lisebelisoa le phokotso ea litšila.Ho feta moo, karolo ea eona ho matlafatseng ho tšoarella ha thepa ea moaho e thusa ho lelefatsa bophelo ba moaho, ka hona ho fokotsa tlhoko ea ho lokisoa khafetsa kapa ho nchafatsoa.
Hydroxypropyl methylcellulose (HPMC) e phetha karolo ea bohlokoa ho li-adhesives tsa mehleng ea kajeno le metsoako ea lik'hemik'hale tsa lik'hemik'hale, e fanang ka melemo e mengata e thusang ho ntlafatsa tshebetso, ho sebetsa le ho tšoarella.Sebopeho sa eona se ikhethang sa lik'hemik'hale le thepa li e nolofalletsa ho sebetsa e le ntho e teteaneng, e bolokang metsi le e khothalletsang ho khomarela lihlopheng tsa sekhomaretsi.Ntle le moo, HPMC e ntlafatsa thepa ea rheological ea metsoako ea lik'hemik'hale ea kaho ho thusa ts'ebeliso le ho netefatsa ho ts'oana ha sehlahisoa se felileng.
Tšebeliso e atileng ea HPMC indastering ea kaho e totobatsa bohlokoa ba eona e le tlatsetso e fapaneng e ntlafatsang boleng le botsitso ba thepa ea moaho.Ha mekhoa ea kaho e ntse e tsoela pele ho fetoha, tlhokahalo ea litharollo tse ncha tsa ho ntlafatsa ts'ebetso le ts'ebetso e tšoarellang e tla khanna lipatlisiso le nts'etsopele ea liforomo tse thehiloeng ho HPMC.Ka ho sebelisa bokhoni ba HPMC, indasteri ea kaho e ka bona tsoelo-pele ts'ebetsong ea thepa le ho kenya letsoho ntlafatsong ea tikoloho e hahiloeng ka thata le e tšoarellang.
Nako ea poso: Feb-26-2024