1. Uhlolojikelele:
I-Cellulose ether iyinhlanganisela ye-polymer yemvelo, ukwakheka kwayo kwamakhemikhali kuyi-polysaccharide macromolecule esekelwe ku-β-glucose engena-hydrous, futhi kuneqembu elilodwa eliyinhloko le-hydroxyl kanye namaqembu amabili e-hydroxyl yesibili endandeni ngayinye yesisekelo. Ngokuguqulwa kwamakhemikhali, uchungechunge lokuphuma kwe-cellulose lungatholakala, futhi i-cellulose ether ingenye yazo. I-Cellulose ether iyinhlanganisela ye-polymer enesakhiwo se-ether esenziwe nge-cellulose, njenge-methyl cellulose, i-ethyl cellulose, i-hydroxyethyl cellulose, i-hydroxypropyl cellulose, i-carboxymethyl cellulose, njll. Ngokuvamile, ingatholakala ngesenzo se-alkali cellulose ne-monochloroalkane, i-ethylene oxide. I-propylene oxide noma i-monochloroacetic acid.
2. Ukusebenza kanye nezici:
(1) Izici zokubukeka
I-Cellulose ether ngokuvamile imhlophe noma i-milky white, ayinaphunga, ayinabo ubuthi, impushana ewuketshezi, imunca umswakama kalula, futhi incibilika ibe i-colloid eqinile ye-viscous esobala emanzini.
(2) Ukwakhiwa kwefilimu nokunamathela
I-etherification ye-cellulose ether inethonya elikhulu ezicini zayo nasekusebenzeni kwayo, njengokuncibilika, ikhono lokwenza ifilimu, amandla ebhondi kanye nokumelana nosawoti. I-Cellulose ether inamandla amakhulu emishini, ukuguquguquka, ukumelana nokushisa nokumelana nokubanda, futhi inokuhambisana kahle nama-resin ahlukahlukene nama-plasticizers, futhi ingasetshenziswa ukwenza amapulasitiki, amafilimu, ama-varnishes, ama-adhesives, i-latex kanye nezinto zokugqoka izidakamizwa, njll.
(3) Ukuncibilika
I-Methylcellulose iyancibilika emanzini abandayo, ayincibiliki emanzini ashisayo, futhi iyancibilika kwezinye izinyibilikisi eziphilayo; I-methyl hydroxyethyl cellulose iyancibilika emanzini abandayo, ayincibiliki emanzini ashisayo nasezincibilikisini eziphilayo. Kodwa-ke, lapho isixazululo esinamanzi se-methylcellulose ne-methylhydroxyethylcellulose sishisiswa, i-methylcellulose ne-methylhydroxyethylcellulose izokwehla. I-methylcellulose idlula ku-45-60°C, kuyilapho izinga lokushisa lemvula le-methyl hydroxyethyl cellulose exubile likhuphuka lifinyelele ku-65-80°C. Lapho izinga lokushisa lehliswa, imvula iyahlakazeka kabusha. I-Hydroxyethyl cellulose ne-sodium carboxymethyl hydroxyethyl cellulose zincibilika emanzini kunoma yiliphi izinga lokushisa futhi azincibiliki kuzincibilikisi zemvelo.
(4) ukujiya
I-cellulose ether incibilika emanzini ngesimo se-colloidal, futhi i-viscosity yayo incike ezingeni le-polymerization ye-cellulose ether. Isixazululo siqukethe ama-macromolecules e-hydrated. Ngenxa yokugxambukela kwama-macromolecules, ukugeleza kokuziphatha kwezixazululo kuhlukile kulokho oketshezi lwe-Newtonian, kodwa kubonisa ukuziphatha okushintshayo ngokushintsha kwamandla okugunda. Ngenxa yesakhiwo se-macromolecular se-cellulose ether, i-viscosity yesisombululo ikhula ngokushesha ngokwanda kokugxila futhi yehla ngokushesha ngokunyuka kwezinga lokushisa.
Isicelo
(1) Imboni kawoyela
I-sodium carboxymethyl cellulose isetshenziswa kakhulu ekukhishweni kukawoyela, futhi isetshenziswa ekwenzeni udaka ukuze kwandiswe i-viscosity nokunciphisa ukulahleka kwamanzi. Ingakwazi ukumelana nokungcola okuhlukahlukene kukasawoti oncibilikayo futhi yandise ukubuyiswa kukawoyela. I-sodium carboxymethyl hydroxypropyl cellulose (NaCMHPC) kanye ne-sodium carboxymethyl hydroxyethyl cellulose (NaCMHEC) ama-ejenti amahle okumba udaka kanye nezinto zokwakha zokulungiselela uketshezi oluqedayo, olunezinga eliphezulu lokujikijela nokumelana nosawoti, ukusebenza kahle kwe-anti-calcium, ikhono elihle lokukhulisa i-viscosity, ukumelana nokushisa. (160 ℃) impahla. Ilungele ukulungiselela uketshezi lokumba lwamanzi ahlanzekile, amanzi olwandle namanzi anosawoti agcwele. Ingakhiwa ibe uketshezi lokumba lokuminyana okuhlukahlukene (103-127g/cm3) ngaphansi kwesisindo se-calcium chloride, futhi inokubonakala okuthile nokulahlekelwa uketshezi oluncane, ikhono layo elikhulisa i-viscosity kanye nekhono layo lokunciphisa uketshezi lingcono kune-hydroxyethyl cellulose. , futhi iyisengezo esihle sokwandisa ukukhiqizwa kukawoyela.
I-sodium carboxymethyl cellulose iphuma ku-cellulose esetshenziswa kabanzi enqubweni yokukhipha uwoyela. Isetshenziselwa uketshezi lokumba, uketshezi lukasimende, uketshezi oluqhekekayo kanye nokwenza ngcono ukutholakala kukawoyela, ikakhulukazi oketshezini lokumba. Ngokuyinhloko idlala indima yokunciphisa ukulahlekelwa uketshezi nokwandisa i-viscosity. I-Hydroxyethyl cellulose (HEC) isetshenziswa njenge-ejenti yokuqinisa udaka kanye ne-stabilizing ngesikhathi sokumba, ukuqeda kahle nokufaka usimende. Uma kuqhathaniswa ne-sodium carboxymethyl cellulose ne-guar gum, i-hydroxyethyl cellulose inomphumela omuhle wokujiya, ukumiswa kwesihlabathi okuqinile, umthamo omkhulu kasawoti, ukumelana nokushisa okuhle, ukumelana nokuxubana okuncane, ukulahlekelwa okuncane koketshezi, nokuphuka kwejeli. I-block, izinsalela eziphansi nezinye izici, isetshenziswe kabanzi.
(2) Imboni yezokwakha nopende
I-sodium carboxymethyl cellulose ingasetshenziswa njenge-retarder, i-ejenti yokugcina amanzi, i-thickener kanye ne-binder yokwakha ama-masonry kanye nezingxube zodaka, futhi ingasetshenziswa njenge-plaster, udaka kanye nezinto zokulinganisa umhlabathi zesisekelo se-gypsum kanye nesisekelo sikasimende Isetshenziswa njenge-disperant, amanzi. i-ejenti yokugcina kanye ne-thickener. Ingxube ekhethekile ye-masonry kanye ne-plastering mortar eyenziwe nge-carboxymethyl cellulose, engathuthukisa ukusebenza, ukugcinwa kwamanzi kanye nokumelana nokuqhekeka kodaka, futhi igweme ukuqhekeka nokuvaleka odongeni lwebhulokhi. isigubhu. Izinto zokwakha umhlobiso ongaphezulu u-Cao Mingqian nabanye benza into yokuhlobisa indawo yokwakha evumelana nemvelo nge-methyl cellulose. Inqubo yokukhiqiza ilula futhi ihlanzekile. Ingasetshenziselwa udonga olusezingeni eliphezulu kanye nezindawo zamathayela wamatshe, futhi ingasetshenziselwa ukuhlobisa ngaphezulu kwamakholomu nezikhumbuzo.
(3) Imboni yamakhemikhali yansuku zonke
I-viscosifier yokuqinisa i-sodium carboxymethyl cellulose idlala indima yokuhlakazeka nokumiswa kokuqina emikhiqizweni yokunamathisela yezinto ezingavuthiwe zempushana, futhi idlala indima yokujiya, ihlakaze kanye ne-homogenizing kuzimonyo eziwuketshezi noma ze-emulsion. Ingasetshenziswa njenge-stabilizer kanye ne-tackifier. Ama-Emulsion stabilizer asetshenziswa njengama-emulsifiers, ama-thickeners nama-stabilizer wamafutha okugcoba nama-shampoos.I-sodium carboxymethyl hydroxypropyl celluloseingasetshenziswa njenge-stabilizer ye-toothpaste adhesives. Inezici ezinhle ze-thixotropic, okwenza umuthi wokuxubha ube muhle ekufomeni, ukugcina isikhathi eside ngaphandle kokuguqulwa, kanye nokunambitheka okufanayo nokuthambile. I-sodium carboxymethyl hydroxypropyl cellulose inokumelana nosawoti okuphakeme nokumelana ne-asidi, futhi umphumela wayo uphakeme kakhulu kunalowo we-carboxymethyl cellulose. Ingasetshenziswa njenge-thickener ku-detergents kanye ne-anti-stain agent. I-dispersion thickener ekukhiqizeni okokuhlanza, i-sodium carboxymethylcellulose ngokuvamile isetshenziswa njengesisabalalisi sokungcola sempushana yokuwasha, i-thickener kanye ne-disperant yezinto zokuhlanza uketshezi.
(4) Imboni yezokwelapha nokudla
Embonini yezemithi, i-hydroxypropyl carboxymethylcellulose (HPMC) ingasetshenziswa njenge-excipient yezidakamizwa, esetshenziswa kabanzi ekukhululweni okulawulwa ngomlomo kwezidakamizwa ze-matrix kanye namalungiselelo okukhululwa okuqhubekayo, njengento ebambezela ukukhululwa yokulawula ukukhishwa kwezidakamizwa, njengento yokwemboza ukuze kubambezeleke Ukukhishwa. ukwakheka, ama-pellets akhululiwe, ama-capsules akhululiwe. Okusetshenziswa kakhulu i-methyl carboxymethyl cellulose ne-ethyl carboxymethyl cellulose, njenge-MC, evame ukusetshenziselwa ukwenza amaphilisi namaphilisi, noma ukumboza amaphilisi ambozwe ngoshukela. Ama-ether e-cellulose esezingeni le-premium angasetshenziswa embonini yokudla, futhi angama-thieners asebenzayo, ama-stabilizer, ama-excipients, ama-ejenti okugcina amanzi kanye nama-foam ejenti ayimishini ekudleni okuhlukahlukene. I-Methyl cellulose kanye ne-hydroxypropyl methyl cellulose kuye kwaqashelwa njengezinto ezingenabungozi ze-metabolic ezingenabungozi. I-High-purity (ngaphezu kuka-99.5%) i-carboxymethylcellulose (CMC) ingafakwa ekudleni, njengobisi nemikhiqizo kakhilimu, izinongo, ujamu, ijeli, ukudla okusemathinini, isiraphu yetafula neziphuzo. I-Carboxymethyl cellulose enobumsulwa obungaphezu kuka-90% ingasetshenziswa ezicini ezihlobene nokudla, njengokuthuthwa nokugcinwa kwezithelo ezintsha. Lolu hlobo lokugoqa kwepulasitiki lunobuhle bomphumela omuhle wokugcina, ukungcoliswa okuncane, akukho monakalo, nokukhiqiza kalula ngemishini.
(5) Izinto zokusebenza ze-Optical nezikagesi
I-Electrolyte thickening stabilizer inokuhlanzeka okuphezulu kwe-cellulose ether, ukumelana ne-asidi enhle nokumelana nosawoti, ikakhulukazi insimbi ephansi kanye nokuqukethwe kwensimbi esindayo, ngakho-ke i-colloid izinzile kakhulu, ifanele amabhethri e-alkaline, amabhethri e-zinc-manganese I-Electrolyte thickening stabilizer. Ama-cellulose ether amaningi abonisa i-thermotropic liquid crystallinity. IHydroxypropyl cellulose acetate yakha amakristalu e-thermotropic cholesteric liquid angaphansi kuka-164°C.
Isikhathi sokuthumela: Jan-12-2023