I-Cellulose ether yitemu elivamile lochungechunge lwemikhiqizo ekhiqizwa ukusabela kwe-alkali cellulose kanye ne-etherifying agent ngaphansi kwezimo ezithile.I-alkali cellulose ithathelwa indawo ama-ejenti e-etherifying ahlukene ukuze kutholwe okuhlukilei-cellulose ethers.Ngokwezakhiwo ze-ionization zama-substituents, ama-cellulose ether angahlukaniswa abe izigaba ezimbili: i-ionic (njenge-carboxymethyl cellulose) kanye ne-non-ionic (njenge-methyl cellulose).Ngokohlobo lwe-substituent, i-cellulose ether ingahlukaniswa ibe i-monoether (efana ne-methyl cellulose) ne-ether exutshiwe (njenge-hydroxypropyl methyl cellulose).Ngokuvumelana ne-solubility ehlukene, ingahlukaniswa ibe inyibilika emanzini (njenge-hydroxyethyl cellulose) kanye ne-organic solvent-soluble (njenge-ethyl cellulose), njll. ihlukaniswe ngohlobo olusheshayo kanye nohlobo lokuchithwa olubambezelekile oluphathwayo.
Ngemuva kokuthi i-cellulose ether odakeni ichitheke emanzini, ukusatshalaliswa okusebenzayo nokufana okufanayo kwezinto zikasimende ohlelweni kuqinisekiswa ngenxa yomsebenzi ongaphezulu, futhi i-cellulose ether, njenge-colloid evikelayo, "igoqa" izinhlayiya eziqinile nesembozo. kubo endaweni engaphandle.Yakha ifilimu yokugcoba, yenza uhlelo lodaka luzinze, futhi uphinde uthuthukise ukugeleza kodaka ngesikhathi sokuxuba kanye nokushelela kokwakhiwa.
Ngenxa yesakhiwo sawo samangqamuzana, isixazululo se-cellulose ether senza amanzi odaka angabi lula ukulahlekelwa, futhi kancane kancane akhiphe isikhathi eside, enikeza udaka ngokugcina amanzi kahle nokusebenza.
Udaka lukasimende oluzilinganisa ngokwalo, olune-viscosity ephansi ye-hydroxypropyl methylcellulose ether.Njengoba yonke inhlabathi ilinganiselwe ngokwemvelo ngokungenelela okuncane kwabasebenzi bokwakha, uma kuqhathaniswa nenqubo yangaphambilini yokushelela, ukucaba kanye nesivinini sokwakha sithuthukiswa kakhulu.Isikhathi sokuxuba okomile sokuzilinganisa sisebenzisa ithuba elihle lokugcinwa kwamanzi kwe-hydroxypropyl methylcellulose.Njengoba ukuzilinganisa kudinga ukuthi udaka olunyakaziswa ngokulinganayo lukwazi ukuzihlelela phansi, amanzi makhulu uma kuqhathaniswa.Ngemva kokwengeza i-hpmc, izolawula umhlabathi Ukugcinwa kwamanzi okungaphezulu akubonakali, okwenza amandla angaphezulu aphakeme ngemva kokumisa, futhi ukuncipha kuncane, okunciphisa imifantu.Ukwengezwa kwe-HPMC futhi kunikeza i-viscosity, engasetshenziswa njenge-anti-sedimentation aid, ithuthukise uketshezi kanye nokudonsa, futhi ithuthukise ukusebenza kahle kokugandaywa komhlabathi.
I-cellulose ether enhle inesimo sokubukwa esithambile kanye nokuminyana kwenqwaba encane;I-HPMC ehlanzekile inobumhlophe obuhle, izinto zokusetshenziswa ezisetshenziswa ekukhiqizeni zihlanzekile, ukusabela kuningiliziwe futhi akunakho ukungcola, isixazululo esinamanzi sicacile, ukudluliswa kokukhanya kuphezulu, futhi ayikho i-ammonia, isitashi notshwala.Nambitha, i-fibrous ngaphansi kwe-microscope noma ingilazi yokukhulisa.
Isikhathi sokuthumela: Dec-06-2022