Cellulose ether e na le mokhoa o babatsehang oa ho boloka metsi, o ka thibelang mongobo o ka har'a seretse se metsi hore o se ke oa fetoha mouoane pele ho nako kapa o kenngoa ke lera la motheo, le ho etsa bonnete ba hore samente e na le metsi ka ho feletseng, kahoo qetellong ho netefatsa hore thepa ea mochine ea seretse e molemo haholo. ho seretse sa lera le tšesaane le likarolo tsa motheo tse monyang metsi Kapa seretse se hahiloeng tlas'a mocheso o phahameng le maemo a omileng. Phello ea ho boloka metsi ea cellulose ether e ka fetola mokhoa o tloaelehileng oa kaho le ho ntlafatsa tsoelo-pele ea kaho. Ka mohlala, kaho ea plastering e ka etsoa holim'a li-substrates tse monyang metsi ntle le ho kolobisa pele.
Viscosity, litekanyetso, mocheso le sebopeho sa limolek'hule tsa cellulose ether li na le tšusumetso e kholo ts'ebetsong ea eona ea ho boloka metsi. Tlas'a maemo a tšoanang, ho ba le viscosity e kholo ea cellulose ether, ho boloka metsi ho molemo; ha tekanyo e phahame, ho boloka metsi ho molemo. Hangata, palo e nyane ea cellulose ether e ka ntlafatsa haholo ho bolokoa ha seretse. Ha tekanyo e fihla ho e itseng Ha tekanyo ea ho boloka metsi e eketseha, mokhoa oa ho boloka metsi o fokotseha; ha mocheso oa tikoloho o phahama, ho bolokoa ha metsi a cellulose ether hangata ho fokotseha, empa li-ether tse ling tse fetotsoeng tsa cellulose le tsona li na le ho boloka metsi hamolemo tlas'a maemo a phahameng a mocheso; likhoele tse nang le likhato tse tlase tsa sebaka sa Vegan ether e na le ts'ebetso e ntle ea ho boloka metsi.
Sehlopha sa hydroxyl ka molek'hule ea ether ea cellulose le athomo ea oksijene holim'a tlamahano ea ether e tla amahanngoa le molek'hule ea metsi ho etsa tlamo ea hydrogen, ho fetola metsi a mahala hore e be metsi a tlamiloeng, kahoo a bapala karolo e ntle ea ho boloka metsi; molek'hule ea metsi le cellulose ether molecular chain Interdiffusion e lumella limolek'hule tsa metsi hore li kene ka hare ho ketane ea cellulose ether macromolecular 'me e tlas'a matla a matla a tlamang, kahoo a etsa metsi a tlamiloeng le metsi a ferekaneng, a ntlafatsang ho boloka metsi a slurry ea samente; cellulose ether e ntlafatsa slurry e ncha ea samente. Thepa ea rheological, sebopeho sa marang-rang sa porous le khatello ea osmotic kapa thepa ea ho etsa filimi ea cellulose ether e sitisa ho hasana ha metsi.
Cellulose ether e 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 e khahlanong le ho senyeha ha seretse. E sebelisoa haholo bakeng sa seretse sa plastering, seretse se kopanyang litene le sistimi ea ho kenya lebota kantle. Tšusumetso e ntseng e eketseha ea cellulose ether e ka boela ea eketsa bokhoni ba ho thibela ho hasana le homogeneity ea lisebelisoa tse sa tsoa tsoakoa, ho thibela ho senyeha ha lintho, ho arola le ho tsoa mali, 'me e ka sebelisoa ka konkreite ea fiber, konkreite e ka tlas'a metsi le konkreite e ikemetseng.
Phello e matla ea cellulose ether linthong tse thehiloeng ho samente e tsoa ho viscosity ea tharollo ea cellulose ether. Tlas'a maemo a ts'oanang, ho phahama ha viscosity ea cellulose ether, ho tla ba betere ho ba le viscosity ea thepa e fetotsoeng ea samente, empa haeba viscosity e phahame haholo, e tla ama ho phalla le ho sebetsa ha thepa (e kang ho khomarela thipa ea plastering. ). Seretse se ikemetseng le konkreite e ikemetseng, e hlokang metsi a mangata, e hloka viscosity e tlase ea cellulose ether. Ho phaella moo, phello e matla ea cellulose ether e tla eketsa tlhokahalo ea metsi ea thepa e thehiloeng ho samente le ho eketsa chai ea seretse.
The viscosity ea tharollo ea cellulose ether e itšetlehile ka lintlha tse latelang: boima ba molek'hule ea cellulose ether, mahloriso, mocheso, sekhahla sa ho kuta le mokhoa oa teko. Tlas'a maemo a tšoanang, boima bo boholo ba molek'hule ea cellulose ether, bo phahamisa viscosity ea tharollo; ho phahama ha mahloriso, ho phahamisa viscosity ea tharollo. Ha u e sebelisa, tlhokomelo e lokela ho nkoa ho qoba tekanyo e feteletseng le ho ama ts'ebetso ea seretse le konkreite; cellulose ether The viscosity ea tharollo ea ether e tla fokotseha ka ho eketseha ha mocheso, 'me ha ho ntse ho phahama, ho na le tšusumetso e kholo ea mocheso; tharollo ea cellulose ether hangata ke mokelikeli oa pseudoplastic o nang le thepa ea ho kuta moriri, ho feta tekanyo ea ho kuta nakong ea teko , e nyenyane ea viscosity, ka hona, ho kopana ha seretse ho tla fokotseha tlas'a ketso ea matla a ka ntle, e leng molemo ho scraping kaho ea seretse, e le hore seretse se ka ba le ts'ebetso e ntle le momahano ka nako e le 'ngoe; hobane tharollo ea cellulose ether ha e Newtonian Bakeng sa maro, ha mekhoa ea liteko, lisebelisoa le lisebelisoa kapa libaka tsa tlhahlobo tse sebelisetsoang ho hlahloba viscosity li fapane, liphetho tsa tlhahlobo ea tharollo e tšoanang ea cellulose ether e tla fapana haholo.
Limolek'hule tsa cellulose ether li ka lokisa limolek'hule tse ling tsa metsi tsa thepa e ncha sebakeng sa ketane ea limolek'hule, ka hona ho eketsa viscosity ea tharollo. Liketane tsa limolek'hule tsa cellulose ether li kopantsoe ho etsa sebopeho sa marang-rang a mararo, e leng se tla boela se etse hore tharollo ea eona ea metsi e be le viscosity e ntle.
High-viscosity cellulose ether aqueous solution e na le thixotropy e phahameng, eo hape e leng tšobotsi e kholo ea cellulose ether. Litharollo tsa metsi tsa methyl cellulose hangata li na le pseudoplastic le non-thixotropic fluidity ka tlase ho mocheso oa gel, empa li bonts'a thepa ea phallo ea Newtonian ka litheko tse tlase tsa ho kuta. Pseudoplasticity e eketseha ka boima ba molek'hule kapa bongata ba cellulose ether, ho sa tsotelehe mofuta oa ntho e nkeloang sebaka le tekanyo ea ho e nkela sebaka. Ka hona, li-cellulose ethers tsa sehlopha se tšoanang sa viscosity, ho sa tsotellehe hore na mc, HPmc, HEmc, li tla lula li bontša litšobotsi tse tšoanang tsa rheological hafeela mahloriso le mocheso li bolokiloe kamehla. Li-gels tsa mohaho li thehoa ha mocheso o phahama, 'me ho phalla ha thixotropic haholo ho etsahala. Mahloriso a phahameng le a tlaase a viscosity cellulose ethers a bontša thixotropy esita le ka tlase ho mocheso oa gel. Thepa ena e na le molemo o moholo ho lokisoeng ha maemo le ho putlama ha kaho ea seretse sa moaho. Hoa hlokahala ho hlalosa mona hore ho phahama ha viscosity ea cellulose ether, ho boloka metsi ho ntlafala, empa ho phahama ha viscosity, ho phahamisa boima ba molek'hule ea cellulose ether, le ho fokotseha ho tšoanang ha ho qhibiliha ha eona, ho nang le phello e mpe. mabapi le mahloriso a seretse le ts'ebetso ea kaho. Ho phahama ha viscosity, ho totobetse haholoanyane phello e teteaneng holim'a seretse, empa ha e lekane ka ho feletseng. Li-viscosity tse ling tse mahareng le tse tlase, empa cellulose ether e fetotsoeng e na le ts'ebetso e ntle ho ntlafatsa matla a sebopeho sa seretse se metsi. Ka ho eketseha ha viscosity, ho boloka metsi a cellulose ether ho ntlafala.
Nako ea poso: Feb-28-2023