Hydroxyethyl Cellulose (HEC) na hydroxypropyl selulose (HPC) ni bibiri bikomoka kuri selile. Bafite itandukaniro rikomeye muburyo, imikorere no gushyira mubikorwa.
1. Imiterere yimiti
Hydroxyethyl selile (HEC): Hydroxyethyl selulose ikorwa mugutangiza itsinda rya hydroxyethyl (-CH₂CH₂OH) kuri molekile ya selile. Itsinda rya hydroxyethyl ritanga HEC gukemura neza no gutuza.
Hydroxypropyl Cellulose (HPC): Hydroxypropyl selulose ikorwa mugutangiza hydroxypropyl group (-CH₂CHOHCH₃) kuri molekile ya selile. Kwinjiza amatsinda ya hydroxypropyl biha HPC ibisubizo bitandukanye hamwe nuburanga.
2. Gukemura
HEC: Hydroxyethylcellulose ifite imbaraga zo gukemura neza mumazi kandi irashobora gukora igisubizo kiboneye. Gukemura kwayo biterwa nurwego rwo gusimbuza amatsinda ya hydroxyethyl (ni ukuvuga umubare wamatsinda ya hydroxyethyl kuri glucose).
HPC: Hydroxypropyl selulose ifite imbaraga zo gukemuka haba mumazi ndetse no mumashanyarazi, cyane cyane mumashanyarazi nka Ethanol. Ubushobozi bwa HPC bugira ingaruka cyane kubushyuhe. Mugihe ubushyuhe bwiyongera, gukomera kwayo mumazi bizagabanuka.
3. Viscosity and rheology
HEC: Hydroxyethyl selulose ifite ubukonje bwinshi mumazi kandi ikagaragaza imiterere yamazi ya pseudoplastique, ni ukuvuga kunanuka. Iyo ubwoya bwakoreshejwe, ubwiza bwabwo buragabanuka, byoroshye gukoresha no gukoresha.
HPC: Hydroxypropyl selulose ifite ubukonje buke ugereranije kandi ikerekana pseudoplastique isa nigisubizo. Ibisubizo bya HPC birashobora kandi gukora colloide ibonerana, ariko ubusanzwe bwabyo buri munsi ya HEC.
4. Ahantu ho gusaba
HEC: Hydroxyethyl selulose ikoreshwa cyane mubitambaro, ibikoresho byubaka, kwisiga, ibikoresho byo kwisiga hamwe nizindi nzego. Nkumubyimba, stabilisateur no guhagarika agent, irashobora kugenzura neza ububobere na rheologiya ya sisitemu. Mu gusiga amarangi no gutwikira, HEC irinda pigment gutuza kandi inoze kuringaniza.
HPC: Hydroxypropyl selulose ikoreshwa cyane cyane muri farumasi, ibiryo, kwisiga no mubindi bice. Mu nganda zimiti, HPC ikoreshwa nkibikoresho bihuza kandi bigenzurwa na tableti. Mu nganda zibiribwa, irashobora gukoreshwa nkibyimbye na emulisiferi. Bitewe no gukomera kwayo mumashanyarazi, HPC nayo ikoreshwa mubikoresho bimwe na bimwe.
5. Guhagarara no kuramba
HEC: Hydroxyethyl selulose ifite imiti ihamye kandi iramba, ntabwo ishobora guhinduka pH, kandi ikomeza guhagarara neza mugihe cyo kubika. HEC ikomeza guhagarara neza murwego rwo hejuru kandi ruto pH.
HPC: Hydroxypropyl selulose yunvikana nimpinduka zubushyuhe na pH, kandi ikunda guhindagurika cyane cyane mubushyuhe bwinshi. Ihungabana ryayo nibyiza mubihe bya acide, ariko ituze ryayo rizagabanuka mubihe bya alkaline.
6. Ibidukikije hamwe n’ibinyabuzima
HEC: Hydroxyethyl selulose ikomoka kuri selile karemano, ifite ibinyabuzima byiza kandi byangiza ibidukikije.
HPC: Hydroxypropyl selulose nayo ni ibinyabuzima bishobora kwangirika, ariko imyitwarire yayo yo kwangirika irashobora gutandukana bitewe nubushake bwayo nuburyo butandukanye bwa porogaramu.
Hydroxyethyl selulose na hydroxypropyl selulose nibintu bibiri byingenzi biva muri selile. Nubwo bombi bafite ubushobozi bwo kubyimba, gutuza no gukora colloide, kubera itandukaniro ryimiterere, bafite itandukaniro mubisubizo, ubwiza, hamwe nibisabwa. Hariho itandukaniro rikomeye mugutekana. Guhitamo ibikomoka kuri selulose yo gukoresha biterwa nibisabwa byihariye bikenewe nibisabwa.
Igihe cyo kohereza: Kanama-08-2024