Ukusetshenziswa kwe-ethyl cellulose emalungiselelweni emithi

I-Ethylcellulose (EC)iyinhlanganisela ye-semi-synthetic polymer etholakala nge-ethylation ye-cellulose yesitshalo semvelo. Isakhiwo samangqamuzana esivamile sakhiwe amayunithi e-glucose axhunywe ngamabhondi e-β-1,4-glycosidic. Ngenxa ye-biocompatibility yayo enhle kakhulu, ukungabi nobuthi, ukulawuleka okuhle kanye nemithombo eningi, i-ethyl cellulose isetshenziswa kabanzi ekulungiseleleni imithi, ikakhulukazi embonini yezemithi.

1. Izakhiwo eziyisisekelo ze-ethyl cellulose

I-Ethyl cellulose ine-biocompatibility ephezulu futhi ingaba khona emzimbeni womuntu isikhathi eside ngaphandle kokukhiqiza ukusabela okunobuthi. Ukwakheka kwayo kwamakhemikhali kuyinikeza i-hydrophobicity enhle, ukuzinza, ukumelana ne-asidi ne-alkali kanye nezakhiwo ezithile ezilawulwayo zokukhululwa. Ngaphezu kwalokho, i-ethyl cellulose ayincibiliki emanzini, kodwa incibilika kuma-solvents ephilayo njenge-ethanol, i-chloroform, i-acetone, njll. Lezi zakhiwo zinikeza amathemba amaningi okusebenza emalungiselelweni emithi.

2. Ukusetshenziswa kwe-ethyl cellulose emalungiselelweni emithi

Inkambu yesicelo se-ethyl cellulose ibanzi kakhulu, ihlanganisa amalungiselelo omlomo, imijovo, amalungiselelo angaphandle nezinye izici eziningi. Okulandelayo yizicelo ezimbalwa eziyinhloko ze-ethyl cellulose emalungiselelweni emithi.

2.1 Amalungiselelo okukhishwa okulawulwayo kwemithi yomlomo

Ukusetshenziswa okuvame kakhulu kwe-ethyl cellulose kufana ne-ejenti ekhishwayo elawulwayo, ikakhulukazi emalungiselelweni okukhishwa okulawulwayo kwezidakamizwa zomlomo. Imvelo ye-hydrophobic kanye nokulawuleka kwe-ethyl cellulose kuyenza ibe into efanelekile yokukhishwa kwesidakamizwa okusimeme. Emalungiselelweni okukhishwa okuqhubekayo kwezidakamizwa, i-ethyl cellulose ingabambezela izinga lokukhululwa komuthi ngokwenza ifilimu enamathelayo, ngaleyo ndlela kufezeke inhloso yokwelula umphumela wesidakamizwa. Ngokulungisa isisindo samangqamuzana e-ethyl cellulose, ukujiya kwesendlalelo sokumboza kanye nohlobo lwe-solvent ekhethiwe, izinga lokukhululwa kanye nemodi yokukhululwa yomuthi ingalawulwa.

I-Ethyl cellulose ivamise ukusetshenziselwa ukulungisa amaphilisi omlomo aqinile akhishwa njalo. Umuthi usongwe ngefilimu ye-ethyl cellulose. Inqubo yokukhululwa kwezidakamizwa ingalawulwa ukuvuvukala nokuncibilika kwefilimu kanye nokungena kwe-solvent. Ngokuvumelana nezimo ezihlukene zokwakheka kanye nenqubo, i-ethyl cellulose ingalawula ngempumelelo isikhathi sokukhululwa komuthi, inciphise inani lezikhathi zokudosa, futhi ithuthukise ukuthobela isiguli.

2.2 Ukumbozwa kwefilimu yezidakamizwa

Emalungiselelweni ezidakamizwa, i-ethyl cellulose ibuye isetshenziselwe ukugqoka ifilimu, ikakhulukazi emalungiselelweni aqinile omlomo njengamaphilisi, ama-granules nama-capsules. Njengento yokugqoka ifilimu, i-ethyl cellulose inezinto ezinhle zokwakha ifilimu, ubushelelezi namandla omshini, okunganikeza ukuvikelwa kwezinhlayiya zezidakamizwa futhi kuvimbele ukuthi izidakamizwa zingacekelwa phansi noma zicasule umgudu wamathumbu endaweni ye-asidi yesisu. Ngesikhathi esifanayo, ifilimu ye-ethyl cellulose ingakwazi ukulawula izinga lokukhululwa kwesidakamizwa, ikakhulukazi ngokulungisa ukushuba kwefilimu nokusebenzisa ama-solvents ahlukene, ama-curve ahlukene okukhululwa angafinyelelwa.

Njengento yokwemboza, i-ethyl cellulose ingabuye ithuthukise ukunambitheka komuthi, igweme ukufutheka noma ukungakhululeki, futhi ikhulise ukwamukelwa kwesiguli.

2.3 Ukulungiswa kwe-emulsion kanye ne-micellar

Ngenxa yokuncibilika kwayo kanye nomsebenzi ongaphezulu, i-ethyl cellulose nayo isetshenziswa kabanzi kuma-emulsions namalungiselelo e-micellar. Ekulungiseleleni ama-emulsions, i-ethyl cellulose, njenge-emulsifier kanye ne-stabilizer, ingathuthukisa ngokuphumelelayo ukunyibilika komuthi futhi yandise ukusebenza komuthi. Ikakhulukazi kwezinye izidakamizwa ezincibilika emafutheni, i-ethyl cellulose ingasiza ekuhlakazeni umuthi ngokuzinzile esigabeni esinamanzi, inciphise ukuna komuthi emanzini, futhi ithuthukise ukutholakala komuthi.

Emalungiselelweni e-micellar, i-ethyl cellulose, njenge-stabilizer, ingakha isakhiwo esizinzile se-micellar yomuthi, ngaleyo ndlela ithuthukise ukunyibilika nokutholakala kwe-bioavailability yomuthi emzimbeni, ikakhulukazi kwezinye izidakamizwa ezingancibiliki kahle.

2.4 Amalungiselelo ezidakamizwa asematheni

I-KimaCell®Ethyl cellulose ibuye isetshenziswe kabanzi ekulungiseleleni izidakamizwa ze-topical, ikakhulukazi ekulungiseni amafutha, okhilimu, ama-gel kanye namanye amalungiselelo. Njenge-thickener, ifilimu yangaphambili kanye ne-stabilizer, i-ethyl cellulose ingathuthukisa ukusabalala, ukunamathela kanye nokufana kwezidakamizwa ze-topical. Emalungiselelweni we-topical njengamafutha nama-creams, i-ethyl cellulose ingathuthukisa i-viscosity nokuzinza kwamalungiselelo, iqinisekise ukusatshalaliswa komfaniswano kanye nokukhululwa okuqhubekayo komuthi ngesikhathi sokusetshenziswa.

2.5 Uhlelo lokuthwala izidakamizwa

I-Ethyl cellulose ingasetshenziswa futhi njengesithwali sezidakamizwa, ikakhulukazi ekulungiseleleni ama-nanocarriers nama-microcarriers. I-Ethyl cellulose ingenza ama-complexes anama-molecule ezidakamizwa ukuze inikeze ukulawula okungcono kokulethwa kwezidakamizwa. Ezinhlelweni ze-nanocarrier, izakhiwo ezingaphezulu ze-ethyl cellulose zingathuthukiswa ngokuguqulwa kwamakhemikhali noma ukwelashwa ngokomzimba ukuze kuthuthukiswe ukulayishwa kwezidakamizwa nokusebenza kokulawula izinga lokukhululwa.

3. Izinzuzo nezinselele ze-ethyl cellulose

Njengesamukeli samalungiselelo ezidakamizwa, i-KimaCell®ethyl cellulose inezinzuzo eziningi. Ine-biocompatibility enhle kanye ne-biodegradability, enganciphisa imiphumela emibi emzimbeni womuntu; ingalawula ngokuphumelelayo ukukhululwa kwezidakamizwa futhi ithuthukise umphumela wokwelapha wezidakamizwa; ngaphezu kwalokho, ubuchwepheshe bokucubungula i-ethyl cellulose buvuthiwe, busetshenziswa kabanzi, bubiza kancane, futhi bufanele ukukhiqizwa okukhulu. Kodwa-ke, i-ethyl cellulose nayo ibhekana nezinselelo ezithile. Isibonelo, ngaphansi kwamanani athile e-pH eyeqisayo noma izimo zokushisa eziphakeme, ukuzinza kwe-ethyl cellulose kungase kwehle, okungase kuthinte umphumela wokusetshenziswa kwayo ezindaweni ezithile.

I-Ethyl celluloseinezinhlobonhlobo zamathemba okufaka isicelo emalungiselelweni emithi, ikakhulukazi emikhakheni yokulungiswa kokukhishwa okulawulwayo, ukumbozwa kwefilimu, ama-emulsions, kanye namalungiselelo ama-topical. Izakhiwo zayo ezinhle kakhulu ezingokomzimba namakhemikhali ziyenza ibe yingxenye ebalulekile yamalungiselelo emithi. Kodwa-ke, ekusebenziseni okungokoqobo, kusadingeka ukuthuthukisa nokuthuthukisa izinhlobo ezithile zezidakamizwa namafomu okulungiselela ukuze kunqobe izinselele zayo ekuzinzeni, ekulawuleni ukukhishwa, njll., futhi kuthuthukiswe umphumela wokwelapha wezidakamizwa nokuthobela isiguli.