Uyini umthombo we-hydroxyethyl cellulose?

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 ngamakhemikhali 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 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 inomsebenzi obalulekile 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 eqinisayo ukuze kuthuthukiswe 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.