I-Hydroxyethyl cellulose (HEC) iyinto ye-polymer engeyona i-ionic encibilika emanzini esetshenziswa kabanzi ezimonyweni, emithini yemithi, opende, ezimbozweni, ekwakheni nakwezinye izindawo. Inokuqina okuhle kakhulu, ukumiswa, ukuhlakazeka, i-emulsification, ukwakha ifilimu, ukugcinwa kwamanzi nezinye izakhiwo, ngakho-ke isibe yi-ejenti elisizayo elibalulekile ezimbonini eziningi. Kodwa-ke, i-hydroxyethyl cellulose ayitholakali ngqo ezintweni zemvelo, kodwa itholakala ngokushintsha i-cellulose yemvelo ngamakhemikhali. Ukuze sifeze lokhu, ukuze siqonde umthombo wemvelo we-hydroxyethyl cellulose, sidinga kuqala ukuqonda umthombo nesakhiwo se-cellulose.
Umthombo wemvelo we-cellulose
I-Cellulose ingenye yama-polymer amaningi kakhulu emhlabeni futhi ikhona kakhulu ezindongeni zamaseli ezitshalo, ikakhulukazi ezitshalweni ezinezinkuni, ukotini, i-flax nezinye izintambo zezitshalo. Iyingxenye ebalulekile esakhiweni sezitshalo futhi inikeza amandla okusebenza kanye nokuqina. Iyunithi eyisisekelo ye-cellulose iyi-molecule ye-glucose, exhunywe yizibopho ze-β-1,4-glycosidic ukwakha isakhiwo seketanga elide. Njengezinto zemvelo ze-polymer, i-cellulose inezakhiwo ezinhle kakhulu zomzimba nezamakhemikhali, okwenza ibe yinto eluhlaza ebalulekile yezinto ezihlukahlukene ezitholakalayo.
Inqubo yokulungiselela i-hydroxyethyl cellulose
Nakuba i-cellulose ngokwayo inezakhiwo eziningi ezinhle kakhulu, ububanzi bokusetshenziswa kwayo bunqunyelwe ngezinga elithile. Isizathu esiyinhloko ukuthi i-cellulose inokuncibilika okuncane, ikakhulukazi ukuncibilika okulinganiselwe emanzini. Ukuze kuthuthukiswe le mpahla, ososayensi bashintsha i-cellulose ngamakhemikhali ukuze balungiselele izinto ezahlukahlukene ezitholakala ku-cellulose. I-Hydroxyethyl cellulose iyi-cellulose ether encibilikayo emanzini etholakala ngokuxuba i-cellulose yemvelo nge-chemical reaction.
Enqubweni ethile yokulungiselela, i-cellulose yemvelo iqala incibilike kusisombululo se-alkali, bese i-ethylene oxide ingezwa ohlelweni lokusabela. Ukusabela kwe-ethoxylation kwamaqembu e-ethylene oxide kanye ne-hydroxyl ku-cellulose kwenzeka ukuze kukhiqizwe i-hydroxyethyl cellulose. Lokhu kuguqulwa kwandisa ukunamathela kwamaketanga e-cellulose, ngaleyo ndlela kuthuthukiswe ukuncibilika kwawo kanye nezakhiwo ze-viscosity emanzini.
Imithombo eyinhloko yezinto zokusetshenziswa
Izinto eziyinhloko zemvelo zokusetshenziswa kokulungiselela i-hydroxyethyl cellulose yi-cellulose, futhi imithombo yemvelo ye-cellulose ihlanganisa:
Izinkuni: Okuqukethwe kwe-cellulose okhunini kuphezulu, ikakhulukazi okhunini lwe-coniferous nolunamaqabunga abanzi, lapho i-cellulose ingafinyelela khona ku-40%-50%. Izinkuni zingomunye wemithombo ebaluleke kakhulu ye-cellulose embonini, ikakhulukazi ekwenzeni amaphepha kanye nokukhiqizwa kwezinto ezitholakala ku-cellulose.
Ukotini: I-fibre yekotini cishe yakhiwe yi-cellulose emsulwa, kanti okuqukethwe kwe-cellulose kukotini kuphakeme ngamaphesenti angaphezu kuka-90. Ngenxa yobumsulwa bayo obuphezulu, i-fibre yekotini ivame ukusetshenziselwa ukulungisa izinto ezisetshenziswayo ze-cellulose ezisezingeni eliphezulu.
Imicu yezitshalo efana ne-flax ne-hemp: Le micu yezitshalo icebile nge-cellulose, futhi ngenxa yokuthi le micu yezitshalo ivame ukuba namandla aphezulu okusebenza, inezinzuzo ezithile ekukhishweni kwe-cellulose.
Imfucuza yezolimo: kufaka phakathi utshani, utshani bukakolweni, utshani bommbila, njll. Lezi zinto ziqukethe inani elithile le-cellulose, futhi i-cellulose ingakhishwa kuzo ngezinqubo ezifanele zokwelashwa, okuhlinzeka ngomthombo oshibhile futhi ovuselelekayo wezinto zokusetshenziswa zokukhiqiza izinto ezisuselwe ku-cellulose.
Izindawo zokusetshenziswa kwe-hydroxyethyl cellulose
Ngenxa yezakhiwo ezikhethekile ze-hydroxyethyl cellulose, isetshenziswa kabanzi emikhakheni eminingi. Nazi izindawo eziningana ezibalulekile zokusetshenziswa:
Imboni Yokwakha: I-Hydroxyethyl cellulose isetshenziswa kabanzi ezintweni zokwakha njengesithako esiqinisayo nesigcina amanzi, ikakhulukazi ku-samente mortar, i-gypsum, i-putty powder nezinye izinto, ezingathuthukisa ngempumelelo izakhiwo zokwakha kanye nezakhiwo zokugcina amanzi zezinto.
Imboni yamakhemikhali yansuku zonke: Ezinhlotsheni zokuhlanza, emikhiqizweni yokunakekelwa kwesikhumba, kuma-shampoo kanye neminye imikhiqizo yamakhemikhali yansuku zonke, i-hydroxyethyl cellulose isetshenziswa njengesithambisi kanye nesiqinisi ukuthuthukisa umuzwa kanye nokuqina komkhiqizo.
Upende kanye nezingubo zokugqoka: Embonini yezingubo zokugqoka, i-hydroxyethyl cellulose isetshenziswa njenge-ejenti yokulawula i-rheology kanye ne-thickener ukuze kuthuthukiswe ukusebenza kahle kwengubo nokugwema ukugoba.
Insimu Yezokwelapha: Emalungiselelweni emithi, i-hydroxyethyl cellulose ingasetshenziswa njenge-binder, thickener kanye ne-alamu yokumiswa kwamaphilisi ukuthuthukisa izici zokukhululwa kanye nokuqina kwemithi.
Nakuba i-hydroxyethyl cellulose ingeyona into eyenzeka ngokwemvelo, izinto zayo eziyisisekelo zokusetshenziswa, i-cellulose, zikhona kakhulu ezitshalweni zemvelo. Ngokushintsha amakhemikhali, i-cellulose yemvelo ingaguqulwa ibe yi-hydroxyethyl cellulose ngokusebenza okuhle kakhulu futhi isetshenziswe ezimbonini ezahlukahlukene. Izitshalo zemvelo ezifana nokhuni, ukotini, i-flax, njll. zinikeza umthombo ocebile wezinto zokusetshenziswa zokukhiqiza i-hydroxyethyl cellulose. Ngokuthuthuka kwesayensi nobuchwepheshe kanye nokwanda kwesidingo sezimboni, inqubo yokukhiqiza i-hydroxyethyl cellulose nayo ithuthukiswa njalo, futhi kulindeleke ukuthi ibonise inani layo eliyingqayizivele emikhakheni eminingi esikhathini esizayo.
Isikhathi sokuthunyelwe: Okthoba-23-2024