I-Cellulose ether iyinhlanganisela ye-polymer ehlanganiswe kusuka ku-cellulose yemvelo ngenqubo ye-etherification, futhi iyi-ejenti enhle kakhulu yokuqina kanye nokugcina amanzi.
Isizinda Socwaningo
Ama-cellulose ethers asetshenziswe kabanzi odakeni oluxutshwe okomile eminyakeni yamuva nje, asetshenziswa kakhulu amanye ama-non-ionic cellulose ethers, okuhlanganisa i-methyl cellulose ether (MC), i-hydroxyethyl cellulose ether (HEC), i-hydroxyethyl cellulose ether Methyl cellulose ether (HEMC). ) kanye ne-hydroxypropyl methyl cellulose ether (HPMC).Njengamanje, azikho izincwadi eziningi zendlela yokulinganisa ye-viscosity yesisombululo se-cellulose ether.Ezweni lethu, izindinganiso ezithile kuphela nama-monographs asho indlela yokuhlola ye-viscosity yesisombululo se-cellulose ether.
Indlela yokulungiselela isixazululo se-cellulose ether
Ukulungiswa kweMethyl Cellulose Ether Solution
I-methyl cellulose ethers ibhekisela kuma-cellulose ethers aqukethe amaqembu e-methyl ku-molecule, njenge-MC, HEMC kanye ne-HPMC.Ngenxa ye-hydrophobicity yeqembu le-methyl, izixazululo ze-cellulose ether eziqukethe amaqembu e-methyl zinezakhiwo ezishisayo ze-gelation, okungukuthi, azincibiliki emanzini ashisayo ezingeni lokushisa elingaphezu kokushisa kwazo kwe-gelation (cishe 60-80 ° C).Ukuze uvimbele isixazululo se-cellulose ether ekwenzeni ama-agglomerates, shisisa amanzi ngaphezu kwezinga lokushisa lejeli, cishe 80 ~ 90 ° C, bese ufaka i-cellulose ether powder emanzini ashisayo, ugovuze ukuze uhlakaze, qhubeka ugoqa futhi uphole Kusethi. izinga lokushisa, ingalungiswa ibe isixazululo se-cellulose ether efanayo.
Izakhiwo zokuncibilika kwama-ether aqukethe i-methylcellulose engaphekiwe
Ukuze kugwenywe ukunqwabelana kwe-cellulose ether phakathi nenqubo yokuhlakazwa, abakhiqizi ngezinye izikhathi benza ukwelashwa kwendawo yamakhemikhali emikhiqizweni eyimpuphu ye-cellulose ether ukuze kubambezeleke ukuchithwa.Inqubo yayo yokuhlakazeka yenzeka ngemva kokuba i-cellulose ether isihlakazwe ngokuphelele, ngakho-ke ingahlakazwa ngokuqondile emanzini abandayo ngenani le-pH elingathathi hlangothi ngaphandle kokwenza ama-agglomerate.Uma liphakeme inani le-pH lesixazululo, siyancipha isikhathi sokuchithwa kwe-cellulose ether enezindawo zokuchithwa ezibambezelekile.Lungisa inani le-pH lesixazululo libe inani eliphakeme.I-alkalinity izoqeda ukunyibilika okubambezeleke kwe-cellulose ether, okubangela ukuthi i-cellulose ether yakhe ama-agglomerate lapho incibilika.Ngakho-ke, inani le-pH lesixazululo kufanele likhushulwe noma lehliswe ngemva kokuba i-cellulose ether isihlakazwe ngokuphelele.
Izici zokuncibilika kwama-ether aqukethe i-methylcellulose aphethwe phezulu
Ukulungiswa kwe-Hydroxyethyl Cellulose Ether Solution
Isixazululo se-Hydroxyethyl cellulose ether (HEC) asinayo indawo ye-gelation eshisayo, ngakho-ke, i-HEC ngaphandle kokwelashwa okungaphezulu izophinde yakha ama-agglomerates emanzini ashisayo.Abakhiqizi ngokuvamile benza ukwelashwa kwendawo yamakhemikhali ku-HEC eyimpuphu ukuze kubambezeleke ukuchithwa, ukuze kuhlakazwe ngokuqondile emanzini abandayo ngevelu ye-pH emaphakathi ngaphandle kokwenza ama-agglomerate.Ngokufanayo, esixazululweni esine-alkalinity ephezulu, i-HEC Ingase futhi yakhe ama-agglomerate ngenxa yokulibaziseka kokulahlekelwa kwe-solubility.Njengoba udaka lukasimende lune-alkaline ngemva kokufakwa kwamanzi futhi inani le-pH lesixazululo liphakathi kuka-12 no-13, izinga lokuncibilika le-ether ye-cellulose egaywe phezulu ku-slurry usimende nalo liyashesha kakhulu.
Izakhiwo zokuncibilika ze-HEC ephathwe phezulu
Isiphetho kanye Nokuhlaziya
1. Inqubo yokusabalalisa
Ukuze ugweme imiphumela emibi ngesikhathi sokuhlolwa ngenxa yokuqedwa kancane kwezinto zokwelashwa ezingaphezulu, kunconywa ukusebenzisa amanzi ashisayo ukulungiselela.
2. Inqubo yokupholisa
Izixazululo ze-cellulose ether kufanele zinyakanyiswe futhi zipholiswe ezingeni lokushisa elizungezile ukuze kuncishiswe izinga lokupholisa, elidinga izikhathi zokuhlola ezinwetshiwe.
3. Inqubo yokugqugquzela
Ngemuva kokuthi i-cellulose ether yengezwe emanzini ashisayo, qiniseka ukuthi uqhubeka ugqugquzela.Lapho izinga lokushisa lamanzi lehla ngaphansi kwezinga lokushisa lejeli, i-cellulose ether izoqala ukuncibilika, futhi isisombululo sizoba yi-viscous kancane kancane.Ngalesi sikhathi, isivinini esishukumisayo kufanele sincishiswe.Ngemuva kokuthi ikhambi lifinyelele ku-viscosity ethile, lidinga ukuma amahora angaphezu kwe-10 ngaphambi kokuba amabhamuza antante kancane phezulu ukuze aqhume futhi anyamalale.
Amabhamuza Omoya ku-Cellulose Ether Solution
4. Inqubo yokufaka amanzi
Izinga le-cellulose ether namanzi kufanele lilinganiswe ngokunembile, futhi uzame ukungalindi isisombululo ukuze sifinyelele i-viscosity ephakeme ngaphambi kokugcwalisa amanzi.
5. Ukuhlolwa kwe-viscosity
Ngenxa ye-thixotropy yesisombululo se-cellulose ether, lapho kuhlolwa i-viscosity yayo, lapho i-rotor ye-viscometer ejikelezayo ifakwe kwisisombululo, izophazamisa isisombululo futhi ithinte imiphumela yokulinganisa.Ngakho-ke, ngemuva kokuthi i-rotor ifakwe kwisisombululo, kufanele ivunyelwe ukuma imizuzu emi-5 ngaphambi kokuhlolwa.
Isikhathi sokuthumela: Mar-22-2023