Yini isicelo seCellulose Ether?

Yethula ukulungiswa kwe-cellulose ether, ukusebenza kwe-cellulose ether kanyeisicelo se-cellulose ether, ikakhulukazi isicelo in ezinengilazi.
Amagama angukhiye: i-cellulose ether, ukusebenza, isicelo
I-Cellulose iyinhlanganisela yemvelo ye-macromolecular. Isakhiwo sawo samakhemikhali siyi-polysaccharide macromolecule ene-β-glucose engenahydrous njengendandatho eyisisekelo. Kuneqembu elilodwa eliyinhloko le-hydroxyl namaqembu amabili esibili e-hydroxyl iringi ngayinye yesisekelo. Ngokuguqulwa kwayo kwamakhemikhali, uchungechunge lokuphuma kwe-cellulose lungatholakala, futhi i-cellulose ether ingenye yazo. Ama-cellulose ether asetshenziswa kakhulu ezimbonini eziningi.

1.Ukulungiselela

I-Cellulose ether itholwa ngokuphendula i-cellulose nge-NaOH, bese isabela ngama-monomer ahlukahlukene asebenzayo njenge-monochloromethane, i-ethylene oxide, i-propylene oxide, njll., nokugeza usawoti womkhiqizo ne-cellulose sodium.

2.Ukusebenza

2.1 Ukubukeka: I-Cellulose ether imhlophe noma i-milky white, ayinaphunga, ayinabo ubuthi, impushana ene-fibrous enoketshezi, ukumunca umswakama kalula, futhi incibilika ibe i-viscous stable colloid ebonakalayo emanzini.
2.2 Ionicity: MC, MHEC, MHPC, HEC are nonionic; I-NaCMC, i-NaCMHEC iyi-anionic.
2.3 I-Etherification: Izici nezinga le-etherification ye-etherification izothinta ukusebenza kwe-cellulose ether ngesikhathi se-etherification, njengokuncibilika, ikhono lokwenza ifilimu, amandla okubopha kanye nokumelana nosawoti.
2.4 Ukunyibilika: (1) I-MC iyancibilika emanzini abandayo, ayincibiliki emanzini ashisayo, futhi iyancibilika kwezinye izincibilikisi; I-MHEC iyancibilika emanzini abandayo, ayincibiliki emanzini ashisayo nakuma-organic solvents. Kodwa-ke, uma isixazululo esinamanzi se-MC ne-MHEC sishisiswa, i-MC ne-MHEC izona. I-MC iwa ngo-45-60°C, kuyilapho izinga lokushisa lemvula le-MHEC exubile lenyuka lifinyelela ku-65-80°C. Lapho izinga lokushisa lehliswa, imvula iyahlakazeka kabusha. (2) I-HEC, i-NaCMC, ne-NaCMHEC iyancibilika emanzini kunoma ikuphi izinga lokushisa, kodwa ayincibiliki kuzincibilikisi zemvelo (ngaphandle kokumbalwa).
2.5 Ukuvuvukala okubambezelekile: I-Cellulose ether inokuvuvukala okubambezeleke okuthile emanzini e-pH angathathi hlangothi, kodwa kunganqoba lokhu kuvuvukala okubambezelekile emanzini ane-alkaline pH.
2.6 I-Viscosity: I-Cellulose ether incibilika emanzini ngendlela ye-colloid, futhi i-viscosity yayo incike ezingeni le-polymerization ye-cellulose ether. Isixazululo siqukethe ama-macromolecules e-hydrated. Ngenxa yokubambeka kwama-macromolecules, ukugeleza kokuziphatha kwezixazululo kuyahluka kuketshezi lwe-Newtonian, kodwa kubonisa ukuziphatha okushintsha ngamandla okugunda. Ngenxa yesakhiwo se-macromolecular se-cellulose ether, i-viscosity yesisombululo ikhula ngokushesha ngokwanda kokugxila futhi yehla ngokushesha ngokunyuka kwezinga lokushisa.
2.7 Ukuzinza kwezinto eziphilayo: I-cellulose ether isetshenziswa esigabeni samanzi. Uma nje amanzi esekhona, amagciwane azokhula. Ukukhula kwamabhaktheriya kuholela ekukhiqizweni kwamabhaktheriya e-enzyme. I-enzyme iphula amabhondi eyunithi ye-anhydroglucose engashintshwanga aseduze ne-cellulose ether, enciphisa isisindo se-molecule ye-polymer. Ngakho-ke, uma isixazululo samanzi se-cellulose ether kufanele sigcinwe isikhathi eside, isilondolozi kufanele sengezwe kuso. Lokhu kuyiqiniso ngisho nama-antimicrobial cellulose ethers.

3. Injongo

3.1 I-Oilfield: I-NaCMC isetshenziswa kakhulu ekuxhashazweni kwendawo kawoyela, futhi isetshenziselwa ukwenza udaka ukuze kwandiswe i-viscosity nokunciphisa ukulahleka kwamanzi. Ingakwazi ukumelana nokungcola okuhlukahlukene kukasawoti oncibilikayo futhi ithuthukise ukubuyiswa kukawoyela. I-sodium carboxymethyl hydroxypropyl cellulose kanye ne-sodium carboxymethyl hydroxyethyl cellulose ama-ejenti amahle okumba udaka kanye nezinto zokwakha zokulungiselela uketshezi oluphelele, olunezinga eliphezulu lokudonsa, ukumelana nosawoti omuhle kanye ne-calcium, Inekhono elihle lokukhulisa i-viscosity nokumelana nezinga lokushisa (160°C). Ilungele ukulungiselela uketshezi lokuphothula lwamanzi ahlanzekile, amanzi olwandle namanzi anosawoti agcwele. Ingenziwa ibe uketshezi oluphelele lokuminyana okuhlukahlukene (1.03-1.279/Cm3) ngaphansi kwesisindo se-calcium chloride, futhi ine-viscosity ethile. Futhi ukulahlekelwa uketshezi oluphansi, i-viscosity yayo ekhulayo kanye nekhono lokunciphisa uketshezi lingcono kune-hydroxyethyl cellulose, iyisengezo esihle sokwandisa ukukhiqizwa kukawoyela.
3.2 Izitsha zobumba: I-NaCMC ingasetshenziswa njenge-retarder, i-ejenti yokugcina amanzi, i-thickener ne-binder, ukuze imikhiqizo yobumba ekhiqiziwe ibe nokubukeka okuhle futhi ingabi nasici namabhamuza.
3.3 Ukwenza iphepha: I-NaCMC isetshenziselwa ukulinganisa kwangaphakathi nangaphandle kanye nokugcwalisa kanye nokugcinwa kwendawo yephepha, futhi ingathatha indawo ye-casein, ukuze uyinki wokuphrinta ungene kalula futhi imiphetho icace. Ekwenziweni kwamaphephadonga, ingasetshenziswa njenge-pigment dispersant, tackifier, stabilizer kanye ne-ejenti yokulinganisa.
3.4 Indwangu: I-NaCMC isetshenziswa esikhundleni sokusanhlamvu nokulinganisa embonini yendwangu, futhi akulula ukuwohloka futhi kube yisikhunta. Lapho uphrinta futhi udaya, asikho isidingo sokwenza i-desizing, futhi udayi ungathola i-colloid efanayo emanzini, okuthuthukisa i-hydrophilicity kanye nokungena kwedayi. Ngesikhathi esifanayo, ngenxa yoshintsho oluncane ku-viscosity, kulula ukulungisa umehluko wombala. I-CMHEC isetshenziswa njenge-thickener yokuphrinta nokudaya i-pulp, enezinsalela ezincane kanye nesivuno sombala ophezulu, futhi ikhwalithi yokunyathelisa nokudaya iphakeme kakhulu kunemikhiqizo yayo eyodwa ye-ionic ne-non-ionic cellulose ether.
3.5 Ugwayi: I-NaCMC isetshenziselwa ukuhlanganisa ugwayi. Incibilika ngokushesha futhi inamandla okubopha aqinile, okuzuzisa ukuthuthukisa izinga likagwayi nokunciphisa izindleko.
3.6 Izimonyo: I-NaCMC idlala indima yokuhlakaza, ukumisa kanye nokusimamisa imikhiqizo yokunamathisela yezinto ezingavuthiwe eziqinile, futhi idlala indima yokujiya, ihlakaze kanye ne-homogenizing kuzimonyo eziwuketshezi noma ze-emulsion. Ingasetshenziswa futhi njenge-emulsifier, i-thickener kanye ne-stabilizer yamafutha kanye ne-shampoo.
3.7 Amabhethri: I-NaCMC inokuhlanzeka okuphezulu, i-asidi enhle nosawoti ukumelana, ikakhulukazi insimbi ephansi nensimbi enzima, futhi i-colloid izinzile kakhulu, ifanele amabhethri e-alkaline namabhethri e-zinc-manganese.
3.8 Opende abasuselwe emanzini: I-HEC kanye ne-MHEC ingasetshenziswa njengeziqinisi, izingqimba kanye nama-ejenti agcina amanzi opende be-latex. Ngaphezu kwalokho, zingasetshenziswa futhi njengama-dispersants, ama-tackifiers kanye nama-ejenti okwenza ifilimu kumapende osimende anemibala.
3.9 Izinto zokwakha: zingasetshenziswa njenge-disperssive, i-ejenti egcina amanzi kanye ne-thiener ukwenza ukhonkolo nodaka longqimba olungaphansi lwe-gypsum nongqimba olungezansi lukasimende, nezinto zokupulasitela phansi.
3.10 Ukucwebezela: Kungasetshenziswa njengengcina ye-glaze.
3.11 Okokuhlanza: Kungasetshenziswa njenge-ejenti evimbela ukunamathela ekuqiniseni ukungcola.
3.12 I-Emulsion dispersion: ingasetshenziswa njenge-stabilizer kanye ne-thickener.
3.13 I-toothpaste: I-NaCMHPC ingasetshenziswa njengesiqinisi sezinto zokunamathela zokuxubha amazinyo. Inezici ezinhle ze-thixotropic, okwenza umuthi wokuxubha ube muhle ngesimo, isikhathi eside ngaphandle kokuguqulwa, futhi unokunambitheka okufanayo nokuthambile. I-NaCMHPC inokumelana nosawoti okuphakeme nokumelana ne-asidi, futhi umphumela wayo uphakeme kakhulu kunalowo we-CMC.

4. Isicelo ku-coatings nama-paste

I-Cellulose ether idlala indima ebaluleke kakhulu ekwakhiweni nasekunamathiseleni. Engeza kuphela inani eliphelele lefomula O. 2% kuya ku-0.5% ingajiya, igcine amanzi, ivimbele ama-pigments nama-filler ukuthi angahlali, futhi andise ukunamathela namandla okubopha.
4.1 I-Viscosity: I-viscosity ye-cellulose ether aqueous solution iyashintsha ngamandla e-shear, futhi upende nokunamathisela okujiywe nge-cellulose ether nakho kunalesi sici. Ukuze kube lula ukusetshenziswa kwe-coating, uhlobo nenani le-cellulose ether kufanele kukhethwe ngokucophelela. Ukuze ugqoke, uma usebenzisa i-cellulose ether, imikhiqizo ye-viscosity ephakathi ingakhethwa.
I-4.2 Ukugcinwa kwamanzi: I-Cellulose ether ingavimbela umswakama ukuthi ungangeni ngokushesha ku-substrate enezimbotshana, ukuze wenze i-coating efanayo phakathi nayo yonke inqubo yokwakha ngaphandle kokuyomisa ngokushesha. Uma okuqukethwe kwe-emulsion kuphezulu, imfuneko yokugcinwa kwamanzi ingafinyelelwa ngokusebenzisa i-ether encane ye-cellulose. Ukugcinwa kwamanzi kapende nama-slurries kuncike ekugxilweni kwe-cellulose ether kanye nezinga lokushisa le-substrate eboshwe.
4.3 Ama-pigments aqinile nama-filler: Ama-pigments nama-filler avame ukushona phansi. Ukuze ugcine umfaniswano wepende futhi uzinzile, izigcwalisi ze-pigment kumele zibe sesimweni esimisiwe. Ukusetshenziswa kwe-cellulose ether kungenza upende ube ne-viscosity ethile, futhi akukho mvula ezokwenzeka ngesikhathi sokugcina.
4.4 Ukunamathela namandla okubopha: Ngenxa yokugcinwa kwamanzi okuhle nokunamathela kwe-cellulose ether, ukunamathela okuhle phakathi kokumboza ne-substrate kungaqinisekiswa. I-MHEC ne-NaCMC inokunamathela okomile okuhle kakhulu nokunamathela, ngakho-ke ifaneleka ngokukhethekile i-pulp yephepha, kuyilapho i-HEC ingafaneleki kule njongo.
4.5 Umsebenzi we-colloid ovikelayo: Ngenxa ye-hydrophilicity ye-cellulose ether, ingasetshenziswa njenge-colloid evikelayo yokumboza.
I-4.6 Thickener: I-Cellulose ether isetshenziswa kakhulu kupende we-latex njenge-thickener yokulungisa i-viscosity yokwakha. I-hydroxyethyl cellulose emaphakathi nephezulu kanye ne-methyl hydroxyethyl cellulose asetshenziswa kakhulu kumapende we-emulsion. Kwesinye isikhathi i-cellulose ether ingasetshenziswa kanye nezingqimba zokwenziwa (ezifana ne-polyacrylate, i-polyurethane, njll.) ukuze kuthuthukiswe ezinye izici zopende we-latex futhi kunikeze ukuqina komfaniswano wepende ye-latex.
Ama-cellulose ethers wonke anezindawo ezinhle kakhulu zokugcina amanzi kanye nezindawo zokujiya, kodwa ezinye izakhiwo zihlukile. I-anionic cellulose ether, kulula ukwenza usawoti ongancibiliki emanzini one-divalent kanye ne-trivalent cations. Ngakho-ke, uma kuqhathaniswa ne-methyl hydroxyethyl cellulose ne-hydroxyethyl fiber, i-sodium carboxymethyl cellulose inokumelana nokukhuhla okubi. Ngakho-ke i-sodium carboxymethyl cellulose ingasetshenziswa kuphela ekwenziweni kopende oshibhile kwe-latex.
I-Methyl hydroxyethyl cellulose kanye ne-methyl hydroxypropyl cellulose ane-viscosity ephansi ye-shear kanye nezakhiwo eziphakeme zokuphuma kwe-surfactant kune-hydroxyethyl cellulose, ngaleyo ndlela zehlisa ukuthambekela kopende be-latex ekusakazeni. Futhi i-carboxymethyl cellulose ayinawo umthelela we-surfactant.
I-Hydroxyethyl cellulose inezici zokumanzisa kahle, ukumelana nokuxubha okuphansi kanye nokwakhiwa okulula kupende we-latex. Uma kuqhathaniswa ne-methyl hydroxyethyl kanye ne-methyl hydroxypropyl cellulose, inokuhambisana kangcono nezingulube, ngakho Kunconywa upende we-latex kasilika, upende we-latex onemibala, ukunamathisela kombala, njll.