Kuti tiyerekeze CMC (carboxymethylcellulose) ndi HPMC (hydroxypropylmethylcellulose), tiyenera kumvetsetsa makhalidwe awo, ntchito zawo, ubwino wawo, kuipa kwawo, ndi momwe angagwiritsire ntchito. Ma cellulose derivatives onsewa amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikizapo mankhwala, chakudya, zodzoladzola ndi zomangamanga. Iliyonse ili ndi makhalidwe ake apadera omwe amawapangitsa kukhala oyenera pazifukwa zosiyanasiyana. Tiyeni tichite kufananiza kwatsatanetsatane kuti tiwone kuti ndi iti yomwe ili bwino pazochitika zosiyanasiyana.
1. Tanthauzo ndi kapangidwe kake:
CMC (carboxymethylcellulose): CMC ndi cellulose yosungunuka m'madzi yomwe imapangidwa ndi momwe cellulose ndi chloroacetic acid zimagwirira ntchito. Ili ndi magulu a carboxymethyl (-CH2-COOH) ogwirizana ndi magulu ena a hydroxyl a glucopyranose monomers omwe amapanga msana wa cellulose.
HPMC (hydroxypropyl methylcellulose): HPMC ndi chinthu chosungunuka m'madzi chomwe chimapangidwa pochiza cellulose ndi propylene oxide ndi methyl chloride. Chili ndi magulu a hydroxypropyl ndi methoxy omwe amamangiriridwa ku msana wa cellulose.
2. Kusungunuka:
CMC: Imasungunuka kwambiri m'madzi, ndikupanga yankho lowonekera komanso lokhuthala. Imasonyeza momwe imayendera madzi mopanda pulasitiki, zomwe zikutanthauza kuti kukhuthala kwake kumachepa ikachepa.
HPMC: Imasungunukanso m'madzi, ndikupanga yankho lolimba pang'ono kuposa CMC. Imasonyezanso khalidwe la pseudoplastic.
3. Kapangidwe ka rheological:
CMC: Imaonetsa khalidwe lochepetsa kudulidwa kwa tsitsi, zomwe zikutanthauza kuti kukhuthala kwake kumachepa ndi kuchuluka kwa kudulidwa kwa tsitsi. Izi zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito pamene kukhuthala kumafunika koma yankho liyenera kuyenda mosavuta pansi pa kudulidwa kwa tsitsi, monga utoto, sopo ndi mankhwala.
HPMC: imakhala ndi khalidwe lofanana ndi la CMC, koma kukhuthala kwake nthawi zambiri kumakhala kwakukulu pakakhala kotsika. Ili ndi mphamvu zabwino zopangira filimu, zomwe zimapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito monga zokutira, zomatira ndi mankhwala opangidwa ndi anthu.
4. Kukhazikika:
CMC: Nthawi zambiri imakhala yokhazikika pa pH ndi kutentha kosiyanasiyana. Imatha kupirira kuchuluka kwa ma electrolyte pang'ono.
HPMC: Yokhazikika kuposa CMC mukakhala ndi acidity, koma imatha kuphwanyidwa ndi hydrolysis mukakhala ndi alkaline. Imakhudzidwanso ndi ma divalent cations, zomwe zingayambitse gelation kapena mvula.
5. Kugwiritsa ntchito:
CMC: imagwiritsidwa ntchito kwambiri ngati chokhuthala, chokhazikika komanso chosungira madzi m'mafakitale azakudya (monga ayisikilimu, msuzi), mankhwala (monga mapiritsi, zotsukira) ndi zodzoladzola (monga kirimu, mafuta odzola).
HPMC: Amagwiritsidwa ntchito kwambiri popanga zinthu zomangira (monga zomatira za matailosi a simenti, pulasitala, matope), mankhwala (monga mapiritsi otulutsa madzi olamulidwa, mankhwala ophera maso), ndi zodzoladzola (monga madontho a maso, mankhwala osamalira khungu).
6. Kuopsa ndi chitetezo:
CMC: Kawirikawiri imadziwika kuti ndi yotetezeka (GRAS) ndi mabungwe olamulira ikagwiritsidwa ntchito mkati mwa malire odziwika bwino pazakudya ndi mankhwala. Ndi yowola komanso yopanda poizoni.
HPMC: Imaonedwanso kuti ndi yotetezeka kugwiritsidwa ntchito mkati mwa malire oyenera. Imagwirizana ndi chilengedwe ndipo imagwiritsidwa ntchito kwambiri m'munda wamankhwala ngati chotulutsira mankhwala cholamulidwa komanso chomangira mapiritsi.
7. Mtengo ndi Kupezeka Kwake:
CMC: Nthawi zambiri imakhala yotsika mtengo kuposa HPMC. Imapezeka mosavuta kuchokera kwa ogulitsa osiyanasiyana padziko lonse lapansi.
HPMC: Yokwera mtengo pang'ono chifukwa cha njira yopangira komanso nthawi zina kupezeka kochepa kuchokera kwa ogulitsa ena.
8. Zotsatira za chilengedwe:
CMC: Yowola, yochokera ku zinthu zongowonjezedwanso (cellulose). Imaonedwa kuti ndi yotetezeka ku chilengedwe.
HPMC: Imatha kuwola ndipo imachokera ku cellulose, kotero imateteza chilengedwe.
CMC ndi HPMC zonse zili ndi makhalidwe apadera omwe amawapangitsa kukhala zowonjezera zofunika m'mafakitale ambiri. Kusankha pakati pawo kumadalira zofunikira zinazake monga kusungunuka, kukhuthala, kukhazikika ndi kuganizira za mtengo. Kawirikawiri, CMC ikhoza kukondedwa chifukwa cha mtengo wake wotsika, kukhazikika kwa pH kwakukulu, komanso kuyenerera kugwiritsidwa ntchito pa chakudya ndi zodzoladzola. Komabe, HPMC ikhoza kukondedwa chifukwa cha kukhuthala kwake kwakukulu, mawonekedwe abwino opangira filimu, komanso kugwiritsidwa ntchito mu mankhwala ndi zipangizo zomangira. Pomaliza, kusankha kuyenera kutengera kuganizira kwathunthu zinthu izi ndikugwirizana ndi momwe zimagwiritsidwira ntchito.
Nthawi yotumizira: Feb-21-2024