I-Hydroxyethyl cellulose (HEC) iyi-ether ye-nonionic cellulose encibilika emanzini, futhi umthombo wayo oyinhloko i-cellulose yemvelo. I-cellulose yemvelo ikhona kakhulu ezitshalweni futhi iyisici esiyinhloko sezindonga zamaseli ezitshalo. Ngokukhethekile, i-hydroxyethyl cellulose yenziwa ngokusabela kwamakhemikhali i-cellulose yemvelo ne-ethylene oxide ngaphansi kwezimo ze-alkali. Le nqubo yokusabela kwamakhemikhali ngokuvamile ibizwa ngokuthi i-ethoxylation, futhi umphumela uba ukuthi amaqembu e-hydroxyl kuma-molecule e-cellulose yemvelo ashintshwa kancane noma aphelele ukuze akhe i-hydroxyethyl cellulose namaqembu e-ethoxy.
Okulandelayo yizinyathelo ezithile zenqubo yokulungiselela i-hydroxyethyl cellulose:
Umthombo we-cellulose: I-Cellulose ivame ukukhishwa ezintweni zezitshalo ezifana nekotini nokhuni. I-cellulose ekhishiwe iyahlanzwa futhi ifakwe i-bleach ukuze kukhishwe ukungcola okufana ne-lignin, i-hemicellulose nezinye izakhi ezingezona i-cellulose ukuze kutholwe i-high-purity cellulose.
Ukwelashwa kwe-alkalinisation: Hlanganisa i-cellulose ne-concentrated sodium hydroxide (NaOH) solution, futhi amaqembu e-hydroxyl ku-cellulose asabela ne-sodium hydroxide ukuze akhiqize i-sodium cellulose. Kule nqubo, ukwakheka kwamangqamuzana e-cellulose kukhula ngezinga elithile, okwenza kube lula ukusabela nge-ethylene oxide.
Ukusabela kwe-ethoxylation: I-alkalized sodium cellulose ixutshwa ne-ethylene oxide (C2H4O) ezingeni lokushisa elithile kanye nokucindezela. Isakhiwo sendandatho ye-ethylene oxide sivuleka ukwakha amaqembu e-ethoxy (-CH2CH2OH), ahlangana namaqembu e-hydroxyl kuma-molecule e-cellulose akhe i-hydroxyethyl cellulose. Le nqubo yokusabela ingenziwa ngamazinga ahlukahlukene, okuholela ku-hydroxyethyl cellulose enamazinga ahlukene okushintsha.
Ngemuva kokwelashwa: Umkhiqizo ngemva kokusabela ngokuvamile uqukethe i-alkali engaphenduliwe, izinyibilikisi nezinye izinto ezikhiqizwayo. Ukuze uthole i-hydroxyethyl cellulose ehlanzekile, izinyathelo zokwelashwa zangemuva ezifana ne-neutralization, ukuwashwa nokomisa kuyadingeka. Umgomo walezi zinyathelo zokwelashwa ukususa i-alkali eyinsalela, izincibilikisi kanye nemikhiqizo ethile ukuze kutholwe umkhiqizo wokugcina ohlanziwe.
I-Hydroxyethyl cellulose isetshenziswe kabanzi ezimbonini ezihlukahlukene ngenxa yezakhiwo zayo zamakhemikhali eziyingqayizivele nokusebenza okuhle kakhulu. Ngokukhethekile, i-hydroxyethyl cellulose inokuncibilika okuhle kwamanzi, ukujiya, ukuzinza, ukwakheka kwefilimu kanye nokuthambisa, futhi isetshenziswa kakhulu kule mikhakha elandelayo:
Izinto zokwakha: Ezintweni zokwakha, i-hydroxyethyl cellulose isetshenziswa kakhulu njenge-thickener kanye ne-ejenti yokugcina amanzi ezintweni ezisekelwe kusimende kanye nezinto ezisekelwe ku-gypsum. Ingathuthukisa ngempumelelo ukusebenza kokwakhiwa kwezinto, ithuthukise ukugcinwa kwamanzi, ukusebenza kahle kanye nokulwa nodaka, yandise isikhathi esivulekile futhi iqinisekise ukuqhubeka kahle kokwakhiwa.
Imboni kapende: Kupende, i-hydroxyethyl cellulose isetshenziswa njenge-thickener, i-ejenti emisa okwesikhashana kanye ne-emulsifier ukuze kuthuthukiswe i-rheology nokuzinza kopende, kuvimbele ukuvela kwe-pigment sedimentation, futhi kuthuthukise ukucaba nokucwebezela kwento enamathelayo.
Izimonyo kanye nemikhiqizo yokunakekela komuntu siqu: Ezimonyoni, i-hydroxyethyl cellulose ivamise ukusetshenziswa njenge-thickener, ifilimu yangaphambili kanye ne-moisturizer. Inganikeza imikhiqizo umuzwa omuhle, ithuthukise ukuzinza nokunamathela komkhiqizo, futhi ithuthukise umphumela wokuswakama.
Imboni yezokwenziwa kwemithi: Emkhakheni wokwenza imithi, i-hydroxyethyl cellulose isetshenziswa njengesamukeli samalungiselelo emithi. Njengengxenye yamaphilisi akhishwa okuqhubekayo, ama-coatings amafilimu, njll., ingalawula izinga lokukhishwa kwezidakamizwa futhi ithuthukise ukuzinza kanye nokuba khona kwezidakamizwa.
Imboni yokudla: Embonini yokudla, i-hydroxyethyl cellulose isetshenziswa njengesengezo sokudla ukuze ibambe iqhaza ekuqiniseni, emulsification nasekuqiniseni. Isetshenziswa kakhulu eziphuzweni, eziphuzweni, emikhiqizweni yobisi nokunye ukudla ukuze kuthuthukiswe ukuthungwa nokunambitha kwemikhiqizo.
I-Hydroxyethyl cellulose nayo inezinhlelo zokusebenza ezibalulekile embonini yokukhipha uwoyela, ukwenza amaphepha, ukuphrinta izindwangu kanye nezimboni zokudaya. Ekukhishweni kukawoyela, i-hydroxyethyl cellulose isetshenziswa njenge-thickener kanye ne-stabilizer yokumba uketshezi, okungathuthukisa amandla okumiswa oketshezi lokumba futhi kuvimbele ukubhidlika kodonga lomthombo. Embonini yokwenza iphepha, isetshenziswa njenge-ejenti yokugcina kanye ne-ejenti yokuqinisa ukuthuthukisa amandla nokuqina kwephepha. Ekuphrinteni kwendwangu kanye nokudaya, i-hydroxyethyl cellulose isetshenziswa njenge-thickener ukusiza udaka lokuphrinta nokudaya ukuthi lusatshalaliswe ngokulinganayo futhi luthuthukise ikhwalithi yokuphrinta nokudaya.
I-Hydroxyethyl cellulose itholakala ku-cellulose yemvelo ngochungechunge lokusabela kwamakhemikhali. Ukusetshenziswa kwayo okubanzi akukona nje kuphela ngenxa yezakhiwo zayo ezinhle kakhulu zomzimba namakhemikhali, kodwa futhi ngoba inganikeza izixazululo ezihlukene ezimbonini eziningi ukuhlangabezana nezidingo ezahlukene zobuchwepheshe.
Isikhathi sokuthumela: Aug-13-2024