Iyini i-hydroxyethyl cellulose?

IHydroxyethyl cellulose (HEC) iyi-polymer encibilika emanzini etholakala ku-cellulose, i-polysaccharide eyenzeka ngokwemvelo etholakala ezitshalweni. I-HEC idalwe ngokuguqulwa kwe-cellulose ngokufakwa kwamaqembu e-hydroxyethyl, anamathele kumayunithi e-glucose we-molecule ye-cellulose. Lokhu kuguqulwa kushintsha izici ze-cellulose futhi kuyenze ibe usizo emisebenzini ehlukahlukene, njengasembonini yokudla, yezimonyo, neyokwenza imithi.

I-HEC iyi-polymer eguquguquka kakhulu, enohlu lwezisindo zamangqamuzana namadigri okushintsha, okunquma izici zayo, njengokuncibilika kwayo, i-viscosity, kanye ne-gelation. I-degree of substitution isilinganiso senani lamaqembu e-hydroxyethyl anamathiselwe kuyunithi ngayinye ye-glucose ye-molecule ye-cellulose, futhi ingaba kusuka ku-1 kuye ku-3, ngamadigri aphezulu abonisa inani elikhulu lamaqembu e-hydroxyethyl.

I-HEC isetshenziswa emikhiqizweni eyahlukene njenge-thickener, stabilizer, kanye ne-binder. Ingasetshenziselwa ukwandisa i-viscosity ye-liquid formulations, ithuthukise ukuthungwa nokuzwakala komlomo wemikhiqizo yokudla, futhi ithuthukise ukuzinza kwama-emulsions. Embonini yezokwenziwa kwemithi, i-HEC isetshenziswa njengesihlanganisi samaphilisi, njengento ejiyayo yokwakheka kwezihloko, nanjenge-ejenti ekhishwa njalo yezinhlelo zokulethwa kwezidakamizwa.

Enye yezinto ezibaluleke kakhulu ze-HEC yikhono layo lokwakha ama-gel emanzini. Lapho i-HEC ichitheka emanzini, ingakha ijeli ngenqubo eyaziwa ngokuthi i-hydration. Inqubo ye-gelation incike ezingeni lokufaka esikhundleni, isisindo samangqamuzana, kanye nokuhlushwa kwe-HEC esixazululweni. Inqubo ye-gelation ye-HEC ingalawulwa ngokulungiswa kwale mingcele, okwenza kube usizo ezinhlobonhlobo zezinhlelo zokusebenza.

I-HEC ivame ukusetshenziswa embonini yokudla njengento eqinisa futhi iqinise emikhiqizweni enjengamasoso, okokugqoka, namasobho. Kungathuthukisa ukuthungwa nokuzwakala komlomo kwale mikhiqizo, futhi kuthuthukise ukuzinza kwayo ngokuhamba kwesikhathi. I-HEC ingasetshenziswa futhi ukuzinzisa ama-emulsions, njengemayonnaise, ngokuvimbela ukuhlukaniswa kwamafutha namanzi.

Embonini yezimonyo, i-HEC isetshenziswa ezinhlobonhlobo zemikhiqizo yokunakekelwa komuntu siqu, okuhlanganisa ama-shampoos, ama-conditioner, ama-lotion, nama-creams. I-HEC ingathuthukisa ukuthungwa nokuvumelana kwale mikhiqizo, ithuthukise izindawo zayo zokuswakama, futhi inikeze umuzwa obushelelezi, othambile. Ingakwazi futhi ukuzinzisa ama-emulsions ekubunjweni kwezimonyo futhi kusize ukuvimbela ukuhlukaniswa kwezingxenye zamafutha namanzi.

Embonini yezemithi, i-HEC isetshenziswa njengesihlanganisi ekwakhiweni kwamathebulethi ukuze kuqinisekiswe ukuthi izithako zethebhulethi zihlala zicindezelwe ndawonye. Ibuye isetshenziswe njenge-thickener for formulations topical, lapho ingathuthukisa i-viscosity nokuzinza kwama-creams namafutha okugcoba. Ukwengeza, i-HEC isetshenziswa njenge-ejenti ekhishwa ngokuqhubekayo ezinhlelweni zokulethwa kwezidakamizwa, lapho ingakwazi ukulawula izinga lokukhishwa kwezidakamizwa emzimbeni.

I-HEC inezici ezimbalwa eziyingqayizivele eziyenza ibe i-polymer ewusizo emisebenzini ehlukahlukene. Ezinye zalezi zakhiwo zihlanganisa:

Ukuncibilika kwamanzi: I-HEC inyibilika kakhulu emanzini, okwenza kube lula ukuyifaka ekwakhiweni okusekelwe emanzini.

Okungeyona ubuthi futhi kuyahambisana ne-biocompatible: I-HEC ngokuvamile ibhekwa njengento ephephile futhi ehambisana ne-biocompatible, okuyenza isebenziseke ekusetshenzisweni kwemithi nezimonyo.

Okuguquguqukayo: I-HEC iyi-polymer eguquguqukayo kakhulu engasetshenziswa ezinhlobonhlobo zezinhlelo zokusebenza ngenxa yekhono layo lokwakha ama-gel futhi ijwayele amazinga ahlukene okushintshanisa nezisindo zamangqamuzana.

Sengiphetha, i-hydroxyethyl cellulose iyi-polymer encibilika emanzini etholakala ku-cellulose ngokungezwa kwamaqembu e-hydroxyethyl.