I-Hydroxyethylcellulose (HEC) iyisithako esiguquguqukayo nesisebenzayo esisetshenziswa kabanzi ezimbonini ezahlukahlukene. Le nhlanganisela itholakala ku-cellulose, i-polymer yemvelo etholakala ngobuningi ezindongeni zamaseli ezitshalo. Izakhiwo ezihlukile ze-HEC ziyenza ibe yindawo ekahle yokuqinisa imikhiqizo ehlukahlukene, kusukela emikhiqizweni yokunakekela umuntu siqu kuya ekwakhiweni kwezimboni.
Ukubuka Konke kwe-Cellulose
I-Cellulose iyi-carbohydrate eyinkimbinkimbi eyakhiwe ngamaketanga aqondile ama-molecule e-glucose axhunywe yizibopho ze-β-1,4-glycosidic. Iyingxenye eyinhloko yesakhiwo sezindonga zamaseli ezitshalo, enikeza ukuqina namandla kumaseli ezitshalo. Kodwa-ke, isimo sayo sendabuko asincibiliki futhi sinomsebenzi olinganiselwe kwezinye izinhlelo zokusebenza.
izinto ezisuselwa ku-cellulose
Ukuze kuthuthukiswe ukusebenza kwe-cellulose, kuye kwakhiwa izinto ezahlukahlukene ezitholakalayo ngokushintsha isakhiwo sayo. Enye yezinto ezinjalo ezitholakalayo yi-hydroxyethyl cellulose (HEC), lapho amaqembu e-hydroxyethyl efakwa khona emgogodleni we-cellulose. Lokhu kuguqulwa kunikeza i-HEC izakhiwo ezihlukile, okwenza incibilike emanzini futhi isebenze kahle kakhulu njengesithako esijiyile.
Izici ze-HEC
Ukuncibilika
Esinye sezici eziyinhloko ze-HEC ukuncibilika kwayo emanzini. Ngokungafani ne-cellulose yemvelo, i-HEC incibilika kalula emanzini, yakha ikhambi elicacile. Lokhu kuncibilika kwenza kube lula ukuyifaka ezinhlobonhlobo zezindlela zokwenziwa.
Izakhiwo ze-Rheological
I-HEC ibonisa ukuziphatha okungama-pseudoplastic noma ukusika, okusho ukuthi i-viscosity yayo iyancipha ngaphansi kokucindezeleka kokusika futhi iyanda futhi ngemva kokuba ukucindezeleka sekuphelile. Lokhu kuhlangana kwemizwa kubalulekile ekusetshenzisweni okudinga ukusabalala kalula noma ukuthululwa, njengokwenziwa kopende, izinamathiselo kanye nemikhiqizo yokunakekela umuntu siqu.
ukuzinza kwe-pH
I-HEC izinzile ebangeni elibanzi le-pH, okwenza ifaneleke ukusetshenziswa ekwakhiweni kwe-acidic, neutral kanye ne-alkaline. Lokhu kuguquguquka kube negalelo ekwamukelweni kwayo kabanzi ezimbonini ezahlukene okuhlanganisa izimonyo, imithi kanye nokudla.
Izicelo ze-HEC
imikhiqizo yokunakekela umuntu siqu
Ama-shampoo nama-Conditioner: I-HEC ivame ukusetshenziselwa ukwenza imikhiqizo yokunakekelwa kwezinwele ibe nkulu, inikeze ukujiya okuhle kakhulu futhi ithuthukise ukuthungwa kwayo yonke.
Ama-creams nama-lotion: Ezakhiweni zokunakekelwa kwesikhumba, i-HEC isiza ekufezeni ukuvumelana okufiselekayo futhi ithuthukise ukusabalala kwama-creams nama-lotion.
I-Toothpaste: Ukuziphatha kwayo okungamanga kwenza kube lula ukwakheka kwamazinyo okuvumela ukusatshalaliswa nokusabalala kalula ngesikhathi sokuxubha.
Upende Nezimbozo
Upende we-latex: I-HEC isiza ukwandisa ukujiya kanye nokuqina kopende we-latex, okuqinisekisa ukuthi upende we-latex usebenza ngokulinganayo phezu komhlaba.
Izinamathiseli: Ekwakheni okunamathelayo, i-HEC isiza ukulawula i-viscosity nokuthuthukisa izakhiwo zokubopha.
umuthi
Ukumiswa Komlomo: I-HEC isetshenziselwa ukuqinisa ukumiswa komlomo ukuze inikeze ifomu eliqinile nelithambile lenhlanganisela yemithi.
Amajeli asetshenziswayo: Ukuncibilika kwe-HEC emanzini kwenza ifaneleke ekwakheni amajeli asetshenziswayo, okuqinisekisa ukuthi kulula ukuwasebenzisa nokumunca.
imboni yokudla
Amasosi nama-dressing: I-HEC isetshenziselwa ukujiya ama-sauce nama-dressing, ithuthukise ukuthungwa kwawo kanye nokuzwakala komlomo.
Imikhiqizo Ebhakiwe: Kwezinye izindlela zokupheka zokubhaka, i-HEC isiza ekuqiniseni ama-batter kanye nenhlama.
Ukukhiqiza nokulawula ikhwalithi
ukuhlanganiswa
I-HEC ivame ukukhiqizwa ngokushintsha i-cellulose nge-ethylene oxide ngaphansi kwezimo ezilawulwayo. Izinga lokushintshaniswa (DS) kweqembu le-hydroxyethyl lingalungiswa ngesikhathi senqubo yokwenziwa, ngaleyo ndlela kuthinte ukusebenza kokugcina kwe-HEC.
QC
Izinyathelo zokulawula ikhwalithi zibalulekile ukuqinisekisa ukusebenza okuhambisanayo kwe-HEC ezinhlotsheni ezahlukene zokusebenza. Amapharamitha anjengesisindo sama-molecule, izinga lokufakwa esikhundleni kanye nobumsulwa aqashwe ngokucophelela ngesikhathi senqubo yokukhiqiza.
izinto ezicatshangelwayo zemvelo
Njenganoma iyiphi inhlanganisela yamakhemikhali, izici zemvelo zibalulekile. I-HEC itholakala ku-cellulose futhi ibola kalula kunezinye izinto zokwenziwa eziqina. Kodwa-ke, kubalulekile ukucabangela umthelela wemvelo wokukhiqiza nokusetshenziswa kwayo ezinhlotsheni ezahlukene.
Ekuphetheni
Ngamafuphi, i-hydroxyethylcellulose (HEC) ivelele njengesithako esisebenzayo nesiguquguqukayo esisetshenziswa ezimbonini eziningi. Izakhiwo zayo ezihlukile, okuhlanganisa ukuncibilika kwamanzi, ukuziphatha kwe-rheological kanye nokuqina kwe-pH, kuyenza ibe yisithako esibalulekile ekwakhiweni kwemikhiqizo ehlukahlukene. Njengoba izimboni ziqhubeka nokufuna ezinye izindlela ezinobungani nemvelo, izakhiwo ze-HEC ezibolayo ezitholakala ku-cellulose yezitshalo ziyenza ibe ukukhetha okusimeme kwezicelo ezahlukahlukene. Ucwaningo oluqhubekayo kanye nokusungula izinto ezintsha kuma-derivatives e-cellulose njenge-HEC kungaholela ekuthuthukisweni okuqhubekayo, kunikeze ukusebenza okuphezulu kanye nomthelela oncishisiwe emvelweni.
Isikhathi sokuthunyelwe: Disemba-02-2023