IHydroxyethyl cellulose (HEC) iyi-polymer engeyona i-ionic encibilika emanzini esetshenziswa kabanzi kuzimonyo, kwezemithi, kumapende, ekuhlanganiseni, ekwakhiweni nakweminye imikhakha. Inokuqina okuhle kakhulu, ukumiswa, ukuhlakazeka, i-emulsification, ukwakhiwa kwefilimu, ukugcinwa kwamanzi nezinye izakhiwo, ngakho-ke isibe i-agent ewusizo ebalulekile ezimbonini eziningi. Kodwa-ke, i-hydroxyethyl cellulose ayitholakali ngokuqondile ezintweni zemvelo, kodwa itholakala ngokushintsha i-cellulose yemvelo ngamakhemikhali. Kulokhu, ukuze siqonde umthombo wemvelo we-hydroxyethyl cellulose, okokuqala sidinga ukuqonda umthombo nokwakheka kwe-cellulose.
Umthombo wemvelo we-cellulose
I-Cellulose ingenye yama-polymers ephilayo amaningi kakhulu emhlabeni futhi ikhona kakhulu ezindongeni zamangqamuzana ezitshalo, ikakhulukazi ezitshalweni ezinokhuni, ukotini, i-flax neminye imicu yezitshalo. Iyingxenye eyinhloko esakhiweni sesitshalo futhi inikeza amandla omshini nokuzinza. Iyunithi eyisisekelo ye-cellulose i-molecule ye-glucose, exhunywe ngamabhondi e-β-1,4-glycosidic ukuze yakhe isakhiwo seketango elide. Njengempahla ye-polymer yemvelo, i-cellulose inezakhiwo ezinhle kakhulu zomzimba namakhemikhali, okwenza ibe impahla eluhlaza ebalulekile yokuphuma okuhlukahlukene.
Ukulungiselela inqubo ye-hydroxyethyl cellulose
Nakuba i-cellulose ngokwayo inezinto eziningi ezinhle kakhulu, ububanzi bokusebenzisa kwayo bulinganiselwe ngezinga elithile. Isizathu esiyinhloko ukuthi i-cellulose ayinakuncibilika kahle, ikakhulukazi ukuncibilika okulinganiselwe emanzini. Ukuze kuthuthukiswe lesi sakhiwo, ososayensi bashintsha i-cellulose ngamakhemikhali ukuze balungiselele okuphuma ku-cellulose okuhlukahlukene. I-Hydroxyethyl cellulose iyi-ether ye-cellulose encibilika emanzini etholwe nge-ethoxylating cellulose yemvelo ngokusabela kwamakhemikhali.
Enqubweni ethile yokulungiselela, i-cellulose yemvelo iqala ukuncibilika kusisombululo se-alkali, bese i-ethylene oxide yengezwa ohlelweni lokusabela. Ukusabela kwe-ethoxylation kwe-ethylene oxide namaqembu e-hydroxyl ku-cellulose kwenzeka ukukhiqiza i-hydroxyethyl cellulose. Lokhu kuguqulwa kwandisa i-hydrophilicity yamaketanga e-cellulose, ngaleyo ndlela kuthuthukise ukuncibilika kwayo kanye nezakhiwo ze-viscosity emanzini.
Imithombo yempahla eluhlaza
Ingqikithi yezinto ezingavuthiwe zemvelo zokulungiswa kwe-hydroxyethyl cellulose yi-cellulose, futhi imithombo yemvelo ye-cellulose ihlanganisa:
Ukhuni: Okuqukethwe kwe-cellulose okhunini kuphezulu, ikakhulukazi okhunini lwe-coniferous kanye namaqabunga abanzi, lapho i-cellulose ingafinyelela ku-40% -50%. Izinkuni zingenye yemithombo ebaluleke kakhulu ye-cellulose embonini, ikakhulukazi ekwenzeni iphepha kanye nokukhiqizwa kwe-cellulose derivatives.
Ukotini: Ifayibha kakotini icishe yakhiwe nge-cellulose emsulwa, kanti okuqukethwe kwe-cellulose kukotini kuphezulu ngendlela engaphezu kuka-90%. Ngenxa yokuhlanzeka kwayo okuphezulu, i-cotton fiber ivame ukusetshenziselwa ukulungisa okuphuma ku-cellulose yekhwalithi ephezulu.
Imicu yezitshalo efana nefilakisi ne-hemp: Le micu yezitshalo nayo inothe nge-cellulose, futhi ngenxa yokuthi le micu yezitshalo ivamise ukuba namandla aphezulu okusebenza, nayo inezinzuzo ezithile ekukhishweni kwe-cellulose.
Imfucumfucu yezolimo: okuhlanganisa utshani, utshani lukakolweni, utshani bommbila, njll. Lezi zinto ziqukethe inani elithile le-cellulose, futhi i-cellulose ingakhishwa kuzo ngezinqubo ezifanele zokwelashwa, ukuhlinzeka ngomthombo oshibhile novuselelekayo wezinto zokusetshenziswa zokukhiqizwa kokuphuma kwe-cellulose. .
Izindawo zokusetshenziswa kwe-hydroxyethyl cellulose
Ngenxa yezakhiwo ezikhethekile ze-hydroxyethyl cellulose, isetshenziswa kabanzi emikhakheni eminingi. Okulandelayo yizindawo ezimbalwa eziyinhloko zohlelo lokusebenza:
Imboni yezokwakha: I-Hydroxyethyl cellulose isetshenziswa kabanzi ezintweni zokwakha njenge-ejenti yokuqina kanye ne-ejenti yokugcina amanzi, ikakhulukazi odakeni lukasimende, i-gypsum, i-putty powder nezinye izinto, ezingathuthukisa ngempumelelo izakhiwo zokwakha kanye nokugcinwa kwamanzi kwezinto.
Imboni yansuku zonke yamakhemikhali: Ezihlanzini, emikhiqizweni yokunakekelwa kwesikhumba, ama-shampoos neminye imikhiqizo yansuku zonke yamakhemikhali, i-hydroxyethyl cellulose isetshenziswa njengento ejiyayo nesiqinisayo ukuze kuthuthukiswe umuzwa nokuzinza komkhiqizo.
Amapende nama-coatings: Embonini yokumboza, i-hydroxyethyl cellulose isetshenziswa njenge-ejenti yokulawula ukuqina kanye ne-rheology ukuze kuthuthukiswe ukusebenza kwe-coating nokugwema ukugoqa.
Inkundla yezemithi: Emalungiselweni emithi, i-hydroxyethyl cellulose ingasetshenziswa njenge-binder, i-thickener kanye ne-ejenti yokumisa amaphilisi ukuze kuthuthukiswe izici zokukhululwa nokuzinza kwezidakamizwa.
Nakuba i-hydroxyethyl cellulose ingeyona into eyenzeka ngokwemvelo, impahla yayo eluhlaza, i-cellulose, ikhona kakhulu ezitshalweni emvelweni. Ngokuguqulwa kwamakhemikhali, i-cellulose yemvelo ingaguqulwa ibe yi-hydroxyethyl cellulose ngokusebenza okuhle kakhulu futhi isetshenziswe ezimbonini ezihlukahlukene. Izitshalo zemvelo ezifana nokhuni, ukotini, i-flax, njll. zihlinzeka ngomthombo ocebile wezinto zokusetshenziswa zokukhiqiza i-hydroxyethyl cellulose. Ngokuthuthuka kwesayensi nobuchwepheshe kanye nokwanda kwesidingo sezimboni, inqubo yokukhiqiza i-hydroxyethyl cellulose nayo ithuthukiswa ngokuqhubekayo, futhi kulindeleke ukuthi ibonise inani layo eliyingqayizivele emikhakheni eyengeziwe esikhathini esizayo.
Isikhathi sokuthumela: Oct-23-2024