Sesebelisoa sa Cellulose Ether ke eng?

E hlahisa tlhahiso ea cellulose ether, cellulose ether performance lekopo ea cellulose ether, haholo-holo kopo ka liphahlo.
Mantsoe a bohlokoa: cellulose ether, ts'ebetso, ts'ebeliso
Cellulose ke motsoako oa tlhaho oa macromolecular. Sebopeho sa eona sa lik'hemik'hale ke polysaccharide macromolecule e nang le β-glucose e anhydrous e le selikalikoe sa motheo. Ho na le sehlopha se le seng sa mantlha sa hydroxyl le lihlopha tse peli tsa bobeli tsa hydroxyl lesale la motheo ka leng. Ka phetoho ea eona ea lik'hemik'hale, ho ka fumanoa letoto la lihlahisoa tsa cellulose, 'me cellulose ether ke e' ngoe ea tsona. Li-cellulose ethers li sebelisoa haholo liindastering tse ngata.

1.Boitokisetso

Cellulose ether e fumanoa ka ho sebetsana le cellulose ka NaOH, ebe e sebetsana le li-monomers tse fapaneng tse sebetsang tse kang monochloromethane, ethylene oxide, propylene oxide, joalo-joalo, le ho hlatsoa letsoai le selulose sodium.

2.Tshebetso

2.1 Ponahalo: Cellulose ether e tšoeu kapa e bosoeu ba lebese, ha e na monko, ha e chefo, phofo ea fibrous e nang le metsi, e bonolo ho monya mongobo, 'me e qhibiliha ka har'a colloid e tsitsitseng e hlakileng ea viscous ka metsing.
2.2 Ionicity: MC, MHEC, MHPC, HEC ke nonionic; NaCMC, NaCMHEC ke anionic.
2.3 Etherification: Litšobotsi le tekanyo ea etherification ea etherification e tla ama ts'ebetso ea cellulose ether nakong ea etherification, e kang solubility, bokhoni ba ho etsa filimi, matla a ho kopanya le ho hanyetsa letsoai.
2.4 Solubility: (1) MC e qhibiliha metsing a batang, ha e qhibilihe metsing a chesang, hape e qhibiliha ka har'a metsoako e meng; MHEC e qhibiliha ka metsing a batang, e ke keng ea qhibiliha ka metsing a chesang le lihlahisoa tsa tlhaho. Leha ho le joalo, ha tharollo ea metsi ea MC le MHEC e futhumatsoa, ​​MC le MHEC li tla na pula. MC e na ka 45-60 ° C, ha mocheso oa lipula oa MHEC o tsoakiloeng o nyolohela ho 65-80 ° C. Ha mocheso o theoha, pula e qhibiliha hape. (2) HEC, NaCMC, le NaCMHEC li qhibiliha metsing ka mocheso ofe kapa ofe, empa ha li khone ho qhibiliha ka har'a li-solvents (ntle le mekhelo e seng mekae).
2.5 Ho ruruha ho liehang: Cellulose ether e na le ho ruruha ho itseng ho liehang ha metsi a pH a sa nke lehlakore, empa e ka hlōla ho ruruha hona ho liehang ha metsi a alkaline pH.
2.6 Viscosity: Cellulose ether e qhibiliha ka metsing ka mokhoa oa colloid, 'me viscosity ea eona e itšetlehile ka tekanyo ea polymerization ea cellulose ether. Tharollo e na le li-macromolecules tse hydrated. Ka lebaka la ho ts'oaroa ha li-macromolecules, mokhoa oa ho phalla oa tharollo o fapane le oa metsi a Newton, empa o bontša boitšoaro bo fetohang ka matla a ho kuta. Ka lebaka la sebopeho sa macromolecular ea cellulose ether, viscosity ea tharollo e eketseha ka potlako ka keketseho ea mahloriso mme e fokotseha ka potlako ka ho eketseha ha mocheso.
2.7 Ho tsitsa ha likokoana-hloko: Cellulose ether e sebelisoa karolong ea metsi. Hafeela metsi a ntse a le teng, libaktheria li tla hōla. Ho hōla ha libaktheria ho lebisa tlhahisong ea libaktheria tsa enzyme. Enzyme e roba li-unit tsa anhydroglucose tse sa nkeloang sebaka tse haufi le cellulose ether, ho fokotsa boima ba molek'hule ea polima. Ka hona, haeba tharollo ea metsi a cellulose ether e lokela ho bolokoa nako e telele, ho tlameha ho eketsoa ho eona. Sena ke 'nete esita le ka li-antimicrobial cellulose ethers.

3. Sepheo

3.1 Oilfield: NaCMC e sebelisoa haholo ts'ebetsong ea oli, 'me e sebelisetsoa ho etsa seretse ho eketsa viscosity le ho fokotsa tahlehelo ea metsi. E ka hanela tšilafalo e fapaneng ea letsoai le ho ntlafatsa ho hlaphoheloa ha oli. Sodium carboxymethyl hydroxypropyl cellulose le sodium carboxymethyl hydroxyethyl cellulose ke lisebelisoa tse ntle tsa ho cheka seretse le lisebelisoa bakeng sa ho lokisa maro a ho qetela, ka lebelo le phahameng la ho phunya, letsoai le khabane le k'halsiamo, E na le bokhoni bo botle ba ho eketsa viscosity le ho hanyetsa mocheso (160 ° C). E loketse bakeng sa ho lokisa maro a ho qetela a metsi a hloekileng, metsi a leoatle le metsi a letsoai a tletseng letsoai. E ka etsoa hore e be maro a phethoang a mefuta e fapaneng ea densities (1.03-1.279/Cm3) tlas'a boima ba calcium chloride, 'me e na le viscosity e itseng. 'Me tahlehelo ea mokelikeli o tlase, bokhoni ba eona bo ntseng bo eketseha le bokhoni ba ho fokotsa mokelikeli bo betere ho feta hydroxyethyl cellulose, ke tlatsetso e ntle ea ho eketsa tlhahiso ea oli.
3.2 Li-ceramics tsa kaho: NaCMC e ka sebelisoa e le retarder, sesebelisoa sa ho boloka metsi, thickener le binder, e le hore lihlahisoa tsa ceramic tse hlahisoang li be le ponahalo e ntle 'me ho se na mefokolo le lipululana.
3.3 Ho etsa lipampiri: NaCMC e sebelisoa bakeng sa boholo ba ka hare le kantle le ho tlatsa le ho boloka bokaholimo ba pampiri, 'me e ka nka sebaka sa casein, e le hore enke ea khatiso e kenelle habonolo le ho hlaka. Ha ho etsoa wallpaper, e ka sebelisoa e le "pigment dispersant", tackifier, stabilizer le sizing agent.
3.4 Textile: NaCMC e sebelisoa e le sebaka sa lijo-thollo le boholo indastering ea masela, 'me ha ho bonolo ho senyeha le ho ba hlobo. Ha ho hatisoa le ho daea, ha ho hlokahale ho etsa desizing, 'me dae e ka fumana colloid e tšoanang ka metsing, e leng ho ntlafatsang hydrophilicity le ho kenella ha dae. Ka nako e ts'oanang, ka lebaka la phetoho e nyenyane ea viscosity, ho bonolo ho fetola phapang ea mebala. CMHEC e sebelisoa e le motenya bakeng sa ho hatisa le ho daea makhasi, a nang le masala a manyenyane le lihlahisoa tse ngata tsa mebala, 'me boleng ba khatiso le ho daea bo phahame haholo ho feta lihlahisoa tsa eona tsa ionic le tse seng tsa ionic cellulose ether.
3.5 Koae: NaCMC e sebelisetsoa ho kopanya koae. E qhibiliha ka potlako 'me e na le matla a matla a ho kopanya, e leng molemo ho ntlafatsa boleng ba lisakerete le ho fokotsa litšenyehelo.
3.6 Litlolo: NaCMC e bapala karolo ea ho qhalakanya, ho emisa le ho tsitsisa lihlahisoa tsa peista ea lisebelisoa tse tala tse tiileng, 'me e bapala karolo ea ho tenya, ho hasanya le ho etsa homogenizing ho litlolo tsa mokelikeli kapa tsa emulsion. E ka boela ea sebelisoa e le emulsifier, thickener le stabilizer bakeng sa mafura le shampoo.
3.7 Batteries: NaCMC e na le bohloeki bo phahameng, acid e ntle le ho hanyetsa letsoai, haholo-holo tšepe e tlaase le tšepe e boima, 'me colloid e tsitsitse haholo, e loketse libeteri tsa alkaline le libeteri tsa zinc-manganese.
3.8 Lipente tse thehiloeng metsing: HEC le MHEC li ka sebelisoa e le li-stabilizers, thickeners le li-agents tse bolokang metsi bakeng sa lipente tsa latex. Ho feta moo, li ka sebelisoa hape e le li-dispersants, li-tackifiers le li-agents tsa ho etsa lifilimi bakeng sa lipente tse mebala tsa samente.
3.9 Thepa ea moaho: e ka sebelisoa e le setsi sa ho qhala, se bolokang metsi le motenya bakeng sa samente le seretse sa gypsum le lera le tlase la samente, le lisebelisoa tsa ho lila fatše.
3.10 Glaze: E ka sebelisoa e le sekhomaretsi sa glaze.
3.11 Detergent: E ka sebelisoa e le sesebelisoa se thibelang ho khomarela bakeng sa litšila tse teteaneng.
3.12 Emulsion dispersion: e ka sebelisoa e le stabilizer le thickener.
3.13 Sesepa sa meno: NaCMHPC e ka sebelisoa e le stabilizer bakeng sa li-adhesives tsa sesepa sa meno. E na le thepa e ntle ea thixotropic, e etsang hore sesepa sa meno se be le sebopeho se setle, sa nako e telele se se na deformation, 'me se na le tatso e ts'oanang le e bonolo. NaCMHPC e na le khanyetso e phahameng ea letsoai le ho hanyetsa acid, 'me phello ea eona e phahametse haholo ea CMC.

4. Kopo ka liphahlo le li-pastes

Cellulose ether e phetha karolo ea bohlokoa haholo ho li-coatings le li-pastes. Eketsa feela palo eohle ea foromo O. 2% ho 0.5% e ka teteaneng, ea boloka metsi, ea thibela li-pigments le li-filler ho rarolla, le ho eketsa matla a ho khomarela le ho kopanya.
4.1 Viscosity: The viscosity ea cellulose ether aqueous solution e fetoha ka matla a ho kuta, 'me pente le pente e teteaneng ka cellulose ether le tsona li na le tšobotsi ena. Bakeng sa boiketlo ba tšebeliso ea ho roala, mofuta le palo ea cellulose ether e tlameha ho khethoa ka hloko. Bakeng sa ho roala, ha u sebelisa ether ea cellulose, lihlahisoa tsa viscosity tse mahareng li ka khethoa.
4.2 Ho boloka metsi: Cellulose ether e ka thibela mongobo hore o kene ka potlako ho substrate e nang le porous, e le hore e ka etsa seaparo se tšoanang nakong ea ts'ebetso eohle ea kaho ntle le ho omisa ka potlako. Ha litaba tsa emulsion li phahame, tlhokahalo ea ho boloka metsi e ka finyelloa ka ho sebelisa ether e nyenyane ea cellulose. Ho boloka metsi a lipente le li-slurries ho itšetlehile ka bongata ba cellulose ether le mocheso oa substrate e koahetsoeng.
4.3 Li-pigments le li-fillers tse tsitsitseng: Li-pigment le li-filler li atisa ho na. Ho boloka junifomo ea pente e tsitsitse, li-pigment fillers li tlameha ho ba boemong bo emisitsoeng. Tšebeliso ea cellulose ether e ka etsa hore pente e be le viscosity e itseng, 'me ha ho pula e tla ba teng nakong ea polokelo.
4.4 Matla a ho khomarela le ho kopanya: Ka lebaka la ho boloka metsi hantle le ho khomarela cellulose ether, ho khomarela hantle pakeng tsa ho roala le substrate ho ka tiisetsoa. MHEC le NaCMC li na le li-adhesion tse omeletseng tse omeletseng le ho khomarela, kahoo li loketse ka ho khetheha bakeng sa makhasi a pampiri, ha HEC e sa tšoanelehe bakeng sa morero ona.
4.5 Ts'ebetso ea colloid e sireletsang: Ka lebaka la hydrophilicity ea cellulose ether, e ka sebelisoa e le colloid e sireletsang bakeng sa ho roala.
4.6 Thickener: Cellulose ether e sebelisoa haholo ka pente ea latex e le motenya ho lokisa viscosity ea kaho. Selulose ea hydroxyethyl e mahareng le e phahameng le selulose ea methyl hydroxyethyl li sebelisoa haholo lipenteng tsa emulsion. Ka linako tse ling cellulose ether e ka boela ea sebelisoa hammoho le li-thickeners tsa maiketsetso (tse kang polyacrylate, polyurethane, joalo-joalo) ho ntlafatsa likarolo tse ling tsa pente ea latex le ho fana ka botsitso ba seaparo sa latex.
Li-cellulose ethers kaofela li na le ts'ebetso e ntle ea ho boloka metsi le thepa e teteaneng, empa thepa e meng e fapane. Anionic cellulose ether, e bonolo ho etsa matsoai a sa qhibiliheng ka metsi a nang le li-cations tsa divalent le trivalent. Ka hona, ha e bapisoa le methyl hydroxyethyl cellulose le hydroxyethyl fiber, sodium carboxymethyl cellulose e na le khanyetso e mpe ea ho hohla. Kahoo sodium carboxymethyl cellulose e ka sebelisoa feela mefuteng e theko e tlaase ea pente ea latex.
Methyl hydroxyethyl cellulose le methyl hydroxypropyl cellulose li na le viscosity e tlase ea shear le thepa e phahameng ea surfactant ho feta hydroxyethyl cellulose, kahoo e fokotsa tšekamelo ea lipente tsa latex ho splatter. 'Me carboxymethyl cellulose ha e na phello ea surfactant.
Hydroxyethyl cellulose e na le litšobotsi tsa metsi a matle, khanyetso e tlase ea borashe le kaho e bonolo ka pente ea latex. Ha e bapisoa le methyl hydroxyethyl le methyl hydroxypropyl cellulose, e lumellana hamolemo le li-pigments, kahoo E khothaletsoa bakeng sa pente ea silika ea latex, pente e mebala ea latex, pente ea mebala, joalo-joalo.