Gukora hydroxyethyl selile (HEC) bikubiyemo urukurikirane rw'imiti ihindura selile, polymer karemano ikomoka ku bimera. HEC ikoreshwa cyane mu nganda zinyuranye, zirimo imiti, amavuta yo kwisiga, ibiryo, nubwubatsi, kubera kubyimbye, gutuza, no kubika amazi.
Intangiriro kuri Hydroxyethyl Cellulose (HEC)
Hydroxyethyl selulose (HEC) ni polymer idafite ionic, amazi-elegitoronike ikomoka kuri selile ikoresheje guhindura imiti. Ikoreshwa cyane nkumubyimba, gusya, no gutuza mubikorwa bitandukanye.
Ibikoresho bito
Cellulose: Ibikoresho byibanze byumusaruro wa HEC. Cellulose irashobora gukomoka mubikoresho bitandukanye bishingiye ku bimera nk'ibiti by'ibiti, ipamba, cyangwa ibisigazwa by'ubuhinzi.
Ethylene Oxide (EO): Imiti yingenzi ikoreshwa mugutangiza amatsinda ya hydroxyethyl kumugongo wa selile.
Alkali: Mubisanzwe sodium hydroxide (NaOH) cyangwa potasiyumu hydroxide (KOH) ikoreshwa nka catalizike mubitekerezo.
Uburyo bwo gukora
Umusaruro wa HEC urimo etherifike ya selile hamwe na okiside ya Ethylene mubihe bya alkaline.
Intambwe zikurikira zerekana inzira:
1. Mbere yo kuvura Cellulose
Cellulose yabanje kwezwa kugirango ikureho umwanda nka lignin, hemicellulose, nibindi bivamo. Cellulose isukuye noneho yumishwa kubintu byihariye.
2. Igisubizo cya Etherification
Gutegura Umuti wa Alkaline: Hateguwe igisubizo cyamazi ya hydroxide ya sodium (NaOH) cyangwa hydroxide ya potasiyumu (KOH). Kwibanda kumuti wa alkali birakomeye kandi bigomba gutezimbere hashingiwe kurwego rwifuzwa rwo gusimbuza (DS) kubicuruzwa byanyuma.
Igenamigambi: Cellulose isukuye ikwirakwizwa mugisubizo cya alkali. Uruvange rushyushye ku bushyuhe bwihariye, ubusanzwe hafi 50-70 ° C, kugirango selile yabyimbye rwose kandi igere kubitekerezo.
Kwiyongera kwa Oxide ya Ethylene (EO): Okiside ya Ethylene (EO) yongewemo buhoro buhoro mubwato bwa reaction mugihe ikomeza ubushyuhe kandi ikomeza. Igisubizo ni exothermic, kugenzura ubushyuhe rero ni ngombwa kugirango wirinde ubushyuhe bukabije.
Igenzura rya reaction: Iterambere ryibisubizo bikurikiranwa no gusesengura ingero mugihe gito. Tekinike nka Fourier-ihindura infrarafurike ya spekitroscopi (FTIR) irashobora gukoreshwa kugirango hamenyekane urwego rwo gusimbuza (DS) rwamatsinda ya hydroxyethyl kumugongo wa selile.
Kutabogama no Gukaraba: DS yifuzwa imaze kugerwaho, reaction irazima muguhindura umuti wa alkaline hamwe na aside, mubisanzwe acide acike. HEC yavuyemo noneho yozwa neza namazi kugirango ikureho reagent zose zitanduye.
3. Kwezwa no Kuma
HEC yogejwe irongera kwezwa binyuze mu kuyungurura cyangwa centrifugation kugirango ikureho umwanda usigaye. HEC isukuye noneho yumishwa kubintu byihariye kugirango ibone ibicuruzwa byanyuma.
Kugenzura ubuziranenge
Kugenzura ubuziranenge ni ngombwa muri gahunda ya HEC kugirango habeho guhuza no kweza ibicuruzwa byanyuma. Ibyingenzi byingenzi byo gukurikirana harimo:
Impamyabumenyi yo gusimbuza (DS)
Viscosity
Ibirungo
pH
Isuku (kubura umwanda)
Ubuhanga bwo gusesengura nka FTIR, gupima ibishishwa, hamwe nisesengura ryibanze bikoreshwa mugucunga ubuziranenge.
Porogaramu ya Hydroxyethyl Cellulose (HEC)
HEC isanga porogaramu mu nganda zitandukanye bitewe n'imiterere yayo itandukanye:
Imiti ya farumasi: Ikoreshwa nkibintu byongera umubyimba mu guhagarika umunwa, ibyingenzi, hamwe na sisitemu yo gutanga ibiyobyabwenge.
Amavuta yo kwisiga: Bikunze gukoreshwa mumavuta, amavuta yo kwisiga, na shampo nkibyimbye kandi bigahindura.
Ibiryo: Yongewe kubicuruzwa byibiribwa nkibibyimba kandi byera, emulifier, na stabilisateur.
Ubwubatsi: Ikoreshwa muri sima ishingiye kuri sima na grout kugirango utezimbere imikorere no gufata amazi.
Ibidukikije n'umutekano
Ingaruka ku bidukikije: Umusaruro wa HEC urimo gukoresha imiti nka okiside ya Ethylene na alkalis, ishobora kugira ingaruka ku bidukikije. Gucunga neza imyanda no kubahiriza amabwiriza ni ngombwa kugirango hagabanuke ingaruka z’ibidukikije.
Umutekano: Okiside ya Ethylene ni gaze cyane kandi yaka umuriro, itera ingaruka z'umutekano mugihe cyo kuyitunganya no kubika. Guhumeka bihagije, ibikoresho birinda umuntu ku giti cye (PPE), hamwe na protocole yumutekano birakenewe kugirango umutekano w'abakozi ukorwe.
Hydroxyethyl selulose (HEC) ni polymer ifite agaciro gakoreshwa mubikorwa bitandukanye mubikorwa bya farumasi kugeza mubwubatsi. Umusaruro wacyo urimo etrifisation ya selile hamwe na okiside ya Ethylene mubihe bya alkaline. Ingamba zo kugenzura ubuziranenge ningirakamaro kugirango habeho guhuza no kweza ibicuruzwa byanyuma. Ibidukikije n’umutekano bigomba no gukemurwa mubikorwa byose. Mugukurikiza uburyo bukwiye hamwe na protocole, HEC irashobora kubyazwa umusaruro mugihe hagabanijwe ingaruka z’ibidukikije no kurinda umutekano w'abakozi.
Aka gatabo gakubiyemo uburyo bwo gukora hydroxyethyl selulose (HEC) ku buryo burambuye, kuva ku bikoresho fatizo kugeza kugenzura ubuziranenge no kubishyira mu bikorwa, bitanga ibisobanuro birambuye kuri iki gikorwa gikomeye cyo gukora polymer.
Igihe cyo kohereza: Apr-10-2024