Phello e matla ea cellulose ether

Cellulose ethere fana ka seretse se metsi ka viscosity e ntle haholo, e ka eketsang haholo bokhoni ba ho kopanya pakeng tsa seretse se metsi le lera la motheo, le ho ntlafatsa ts'ebetso ea anti-sag ea seretse. E sebelisoa haholo bakeng sa seretse sa plastering, tsamaiso ea ka ntle ea lebota le seretse sa ho kopanya litene. Phello e ntseng e eketseha ea cellulose ether e ka boela ea eketsa homogeneity le bokhoni ba ho thibela ho hasana ha thepa e sa tsoa tsoakoa ea samente, ho thibela delamination, karohano le ho tsoa mali a seretse le konkreite, 'me e ka sebelisoa ka konkreite ea fiber, konkreite e ka tlas'a metsi le konkreite e ikemetseng. .

Cellulose ether e eketsa viscosity ea lisebelisoa tse thehiloeng ho samente ho tloha ho viscosity ea tharollo ea cellulose ether. Lenane la "viscosity" hangata le sebelisetsoa ho lekola viscosity ea tharollo ea cellulose ether. Viscosity ea cellulose ether ka kakaretso e bolela tharollo ea cellulose ether e nang le mohopolo o itseng (joalo ka 2%). Lebelo (kapa sekhahla sa ho potoloha, joalo ka 20 rpm), boleng ba viscosity bo lekantsoeng ka sesebelisoa se itseng sa ho metha (joalo ka viscometer e potolohang).

Viscosity ke parameter ea bohlokoa ho lekola ts'ebetso ea cellulose ether. Ho phahama ha viscosity ea tharollo ea cellulose ether, ho na le viscosity e ntle ea lisebelisoa tse thehiloeng ho samente, ho khomarela karoloana ho molemo, le matla a ho thibela ho senyeha le ho thibela ho hasana. Haeba viscosity ea eona e le holimo haholo, e tla ama metsi le ts'ebetso ea lisebelisoa tse thehiloeng ho samente (joalo ka lithipa tse khomaretsang nakong ea kaho ea seretse). Ka hona, viscosity ea cellulose ether e sebelisoang ka har'a seretse se omileng se kopantsoeng hangata ke 15,000 ~ 60,000 mPa. S-1, seretse se ikemetseng le konkreite e iketsetsang, e hlokang metsi a mangata, e hloka viscosity e tlaase ea cellulose ether.

Ho phaella moo, phello e matla ea cellulose ether e eketsa tlhokahalo ea metsi ea thepa e entsoeng ka samente, kahoo e eketsa chai ea seretse.

Viscosity ea tharollo ea cellulose ether e itšetlehile ka lintlha tse latelang:

Boima ba molek'hule (kapa tekanyo ea polymerization) le khatello ea cellulose ether, mocheso oa tharollo, sekhahla sa ho kuta le mokhoa oa teko.

1. Ha tekanyo ea polymerization ea cellulose ether e phahame, boima ba molek'hule bo boholo, 'me e phahamisa viscosity ea tharollo ea eona ea metsi;

2. Ha tekanyo (kapa mahloriso) ea cellulose ether e phahame, e phahamisa viscosity ea tharollo ea eona ea metsi, empa tlhokomelo e lokela ho nkoa ho khetha tekanyo e nepahetseng ha e sebelisoa, e le hore e se ke ea ama ts'ebetso ea seretse le konkreite haeba tekanyo e phahameng haholo;

3. Joalo ka lino tse ngata, viscosity ea tharollo ea cellulose ether e tla fokotseha ka ho eketseha ha mocheso, 'me ha mocheso oa cellulose ether o phahame, ho ba le tšusumetso e kholo ea mocheso;

4. Tharollo ea cellulose ether hangata ke pseudoplastic, e nang le thepa ea ho kuta moriri. Ha lebelo le leholo la ho kuta nakong ea teko, le theola viscosity.

Ka hona, momahano oa seretse o tla fokotseha ka lebaka la matla a ka ntle, a leng molemo ho ho hahoa ha seretse, e le hore seretse se ka ba le ts'ebetso e ntle ea ho sebetsa le ho kopana ka nako e le 'ngoe. Leha ho le joalo, tharollo ea cellulose ether e tla bonts'a litšobotsi tsa mokelikeli oa Newtonian ha mahloriso a le tlase haholo le viscosity e nyane. Ha mahloriso a ntse a eketseha, tharollo e tla bontša butle-butle litšobotsi tsa mokelikeli oa pseudoplastic, 'me ha mahloriso a phahame, ho hlakile haholoanyane pseudoplasticity.