Phapano ke efe lipakeng tsa ts'ebetso ea methyl cellulose ether le lignin fiber?

Phapano ke efe lipakeng tsa ts'ebetso ea methyl cellulose ether le lignin fiber?

Karabo: Papiso ea ts'ebetso pakeng tsa methyl cellulose ether le lignin fiber e bontšoa tafoleng

 Papiso ea ts'ebetso lipakeng tsa methyl cellulose ether le lignin fiber

Ke eng eo u lokelang ho e ela hloko ha u sebelisa methyl cellulose le carboxymethyl cellulose?

Karabo: (1) Ha u sebelisa metsi a chesang ho qhala cellulose, e tlameha ho pholile ka ho feletseng pele e sebelisoa. Thempereichara e hlokahalang bakeng sa ho qhalana ka ho feletseng le pepeneneng e loketseng e itšetlehile ka mofuta oa selulose.

(2) Mocheso o hlokahalang ho fumana viscosity e lekaneng

Carboxymethylcellulose≤25℃, methylcellulose≤20℃

(3) Butle-butle le ka mokhoa o ts'oanang oa sieve selulose ka metsing, 'me u hlohlelletse ho fihlela likaroloana tsohle li kenngoa, ebe u hlohlelletsa ho fihlela tharollo eohle ea cellulose e hlakile ka ho feletseng le e hlakileng. U se ke ua tšela metsi ka ho toba ka selulose, 'me u se ke ua eketsa ka ho toba palo e kholo ea selulose e seng e kolobisitsoe' me e entsoe ka makukuno kapa libolo ka har'a setshelo.

(4) Pele phofshoana ea cellulose e kolobisoa ka metsi, u se ke ua eketsa lintho tsa alkaline ho motsoako, empa ka mor'a ho qhalakanngoa le ho koloba, ho ka eketsoa ka tharollo e nyenyane ea alkaline e nang le metsi (pH8 ~ 10) ho potlakisa ho qhibiliha. Tse ka sebelisoang ke: sodium hydroxide aqueous solution, sodium carbonate aqueous solution, sodium bicarbonate aqueous solution, lime water, ammonia water le organic ammonia, joalo-joalo.

5 Haeba e kenngoa ka ho toba ho tharollo ea alkaline, phekolo ea holim'a metsi e tla hlōleha 'me e baka condensation, kahoo tlhokomelo e eketsehileng e lokela ho nkoa.

Lintho tsa methylcellulose ke life?

Karabo: (1) Ha e futhumala ka holimo ho 200 ° C, e qhibiliha ebe e senyeha. Likahare tsa molora li ka ba 0.5% ha li chesoa, 'me ha li nke lehlakore ha li entsoe ka slurry ka metsi. Ha e le viscosity ea eona, e itšetlehile ka tekanyo ea polymerization.

(2) Ho qhibiliha ka metsing ho fapane ka tsela e fapaneng le mocheso, mocheso o phahameng o na le ho qhibiliha ho tlaase, mocheso o tlaase o na le ho qhibiliha ho holimo.

(3) E ka qhibiliha ka har'a motsoako oa metsi le metsoako ea lintho tse phelang, tse kang methanol, ethanol, ethylene glycol, glycerin le acetone.

(4) Ha ho na le matsoai a tšepe kapa li-electrolyte tsa manyolo ka har'a tharollo ea metsi, tharollo e ntse e ka lula e tsitsitse. Ha electrolyte e kenngoa ka bongata, gel kapa pula e tla etsahala.

(5)E na le ts'ebetso ea bokaholimo. Ka lebaka la boteng ba lihlopha tsa hydrophilic le hydrophobic ka limolek'hule tsa eona, e na le mesebetsi ea emulsification, colloid e sireletsang le botsitso ba mohato.

(6) Ho chesa ho chesa. Ha tharollo e nang le metsi e nyolohela mochesong o itseng (ka holim'a mocheso oa gel), e tla fetoha pherekano ho fihlela e qhibiliha kapa e theoha, e leng se etsang hore tharollo e lahleheloe ke viscosity ea eona, empa e ka khutlela sebakeng sa pele ka mor'a ho pholile. Thempereichara eo gelation le pula li hlahang ho eona e itšetlehile ka mofuta oa sehlahisoa, motsoako oa tharollo, le lebelo la ho futhumatsa.

(7) pH e tsitsitse. Viscosity ea tharollo ea metsi ha e amehe habonolo ke asiti le alkali. Ka mor'a ho eketsa palo e kholo ea alkali, ho sa tsotellehe mocheso o phahameng kapa mocheso o tlaase, e ke ke ea baka ho bola kapa ho arohana ha ketane.

8 Ha e fetohe e mosehla kapa e boreleli ha e pepeselitsoe khanya, 'me e ka boela ea qhibiliha ka metsing. Haeba formaldehyde e eketsoa tharollong kapa ka mor'a ho phekoloa ka formaldehyde, filimi ha e qhibilihe ka metsing, empa e ntse e ka atoloha ka mokhoa o itseng.

(9)Ho teteana. E ka etsa hore tsamaiso ea metsi e teteaneng le e se nang metsi, 'me e na le ts'ebetso e ntle ea anti-sag.

(10)Viscosity. Tharollo ea eona ea metsi e na le momahano o matla, o ka ntlafatsang momahano oa samente, gypsum, pente, pigment, wallpaper, joalo-joalo.

(11)Ho emisoa. E ka sebelisoa ho laola coagulation le pula ea likaroloana tse tiileng.

(12) Sireletsa colloid le ho ntlafatsa botsitso ba colloid. E ka thibela ho bokellana le ho kopana ha marotholi le li-pigments, le ho thibela pula ka katleho.

(13) ho boloka metsi. Tharollo ea metsi e na le viscosity e phahameng. Ha e kenngoa seretseng, e ka boloka metsi a mangata, e leng se thibelang ka katleho ho kenngoa ha metsi ka mokhoa o feteletseng ke substrate (joaloka litene, konkreite, joalo-joalo) le ho fokotsa lebelo la mouoane oa metsi.

(14) Joalo ka litharollo tse ling tsa colloidal, e tiisoa ke li-tannins, li-protein precipitants, silicates, carbonates, joalo-joalo.

(15) E ka kopanngoa le carboxymethyl cellulose ka tekanyo leha e le efe ho fumana liphello tse khethehileng.

(16) Ts'ebetso ea polokelo ea tharollo e ntle. Haeba e ka bolokoa e hloekile nakong ea tokiso le polokelo, e ka bolokoa libeke tse ’maloa ntle le ho bola.

TLHOKOMELISO: Methylcellulose ha se mokhoa oa ho hōla oa likokoana-hloko, empa haeba o silafatsoa ke likokoana-hloko, e ke ke ea ba thibela ho ata. 'me viscosity e tla fokotseha ka nako ena. E ka boela ea baka ho arohana ha li-oxidizing agents, haholo-holo ka tharollo ea alkaline.

Ke phello efe ea mantlha ea carboxymethyl cellulose (CMC) ho gypsum?

Karabo: Carboxymethyl cellulose (CMC) haholo-holo e bapala karolo ea ho tiisa le ho khomarela, 'me phello ea ho boloka metsi ha e totobetse. Haeba e sebelisoa hammoho le moemeli oa ho boloka metsi, e ka tiisa le ho tiisa gypsum slurry le ho ntlafatsa ts'ebetso ea kaho, empa carboxymethyl cellulose The base cellulose e tla thibela ho hlophisoa ha gypsum, kapa esita le ho se tiise, 'me matla a tla theoha haholo. , kahoo palo ea tšebeliso e lokela ho laoloa ka thata.