Cellulose ether ke mofuta oa motsoako oa polymer oa organic o sebelisoang haholo ho thepa ea moaho, haholo linthong tse entsoeng ka samente. Cellulose ether e ka liehisa ts'ebetso ea hydration ea samente, ka hona e lokisa ho sebetsa, ho beha nako le nts'etsopele ea matla a pele a pente ea samente.
(1). Ho lieha ha hydration
Cellulose ether e ka liehisa karabelo ea hydration ea samente, e fihlellehang haholo ka mekhoa e latelang:
1.1 Adsorption le litlamorao tse sireletsang
Tharollo e phahameng ea viscosity e entsoeng ka ho qhibiliha cellulose ether ka tharollo ea metsi e ka etsa filimi ea adsorption holim'a likaroloana tsa samente. Sebopeho sa filimi ena se bakoa haholo ke ho kenngoa ha 'mele ha lihlopha tsa hydroxyl ka limolek'hule tsa cellulose ether le li-ion tse holim'a likaroloana tsa samente, e leng se etsang hore ho sireletsoe holim'a likaroloana tsa samente, ho fokotsa ho kopana pakeng tsa likaroloana tsa samente le limolek'hule tsa metsi. ho diehisa karabelo ya metsi.
1.2 Ho theha lifilimi
Mehatong ea pele ea samente hydration, cellulose ether e ka etsa filimi e teteaneng holim'a likaroloana tsa samente. Ho ba teng ha filimi ena ka katleho ho sitisa ho ata ha limolek'hule tsa metsi ka hare ho likaroloana tsa samente, ka hona ho liehisa tekanyo ea hydration ea samente. Ho phaella moo, ho thehoa ha filimi ena ho ka boela ha fokotsa ho qhibiliha le ho ata ha li-ion tsa khalsiamo, ho liehisa ho thehoa ha lihlahisoa tsa hydration.
1.3 Ho qhalana le ho lokolloa ha metsi
Cellulose ether e na le ho monya metsi a matla, e ka monya mongobo ebe e e lokolla butle. Ts'ebetso ena ea ho lokolla metsi e ka fetola metsi le ho sebetsa ha slurry ea samente ho isa bohōleng bo itseng, 'me ea liehisa sekhahla sa karabelo ea metsi ka ho fokotsa khatello e sebetsang ea metsi nakong ea ts'ebetso ea hydration.
(2). Tšusumetso ea sebopeho sa mohato oa samente
Li-cellulose ethers li na le litlamorao tse fapaneng ho hydration ea mekhahlelo e fapaneng ea samente. Ka kakaretso, cellulose ether e na le phello e hlakileng haholoanyane ho hydration ea tricalcium silicate (C₃S). Ho ba teng ha cellulose ether ho tla liehisa hydration ea C₃S le ho fokotsa sekhahla sa ho lokolloa ha mocheso oa pele oa hydration oa C₃S, kahoo ho liehisa nts'etsopele ea matla a pele. Ho phaella moo, li-cellulose ethers li ka boela tsa ama hydration ea likarolo tse ling tsa liminerale tse kang dicalcium silicate (C₂S) le tricalcium aluminate (C₃A), empa liphello tsena li batla li le nyenyane.
(3). Rheology le liphello tsa sebopeho
Cellulose ether e ka eketsa viscosity ea slurry ea samente mme ea ama rheology ea eona. High viscosity slurry e thusa ho fokotsa ho lokisa le ho qhekella ha likaroloana tsa samente, ho lumella slurry ea samente ho boloka ho tšoana hantle pele ho beha. Tšobotsi ena e phahameng ea viscosity ha e liehe feela ts'ebetso ea hydration ea samente, empa hape e ntlafatsa ts'ebetso ea mokelikeli le kaho ea seretse sa samente.
(4). Liphello tsa ts'ebeliso le litemoso
Li-cellulose ethers li na le phello e kholo ho fokotseng samente hydration 'me ka hona li atisa ho sebelisoa ho lokisa nako ea ho beha le ho phalla ha thepa e entsoeng ka samente. Leha ho le joalo, tekanyo le mofuta oa cellulose ether li hloka ho laoloa ka nepo, hobane cellulose ether e feteletseng e ka baka mathata a kang ho se lekane ha matla a pele le ho honyela ho hoholo ha thepa e thehiloeng ho samente. Ho phaella moo, mefuta e sa tšoaneng ea cellulose ethers (e kang methylcellulose, hydroxypropylmethylcellulose, joalo-joalo) e na le mekhoa le liphello tse fapaneng ka li-slurries tsa samente, 'me li hloka ho khethoa ho ea ka litlhoko tse khethehileng tsa kopo.
Tšebeliso ea cellulose ether ka thepa e thehiloeng ho samente e ke ke ea lieha feela ka katleho karabelo ea hydration ea samente, empa hape e ntlafatsa ts'ebetso ea kaho le ho tšoarella ha thepa. Ka khetho e utloahalang le tšebeliso ea li-cellulose ethers, boleng le phello ea kaho ea thepa e entsoeng ka samente e ka ntlafatsoa haholo.
Nako ea poso: Aug-03-2024