Kuti tifanizire CMC (carboxymethylcellulose) ndi HPMC (hydroxypropylmethylcellulose), tiyenera kumvetsetsa katundu wawo, ntchito, ubwino, kuipa, ndi zochitika zomwe zingagwiritsidwe ntchito.Ma cellulose onsewa amagwiritsidwa ntchito kwambiri m'mafakitale osiyanasiyana, kuphatikiza mankhwala, chakudya, zodzoladzola ndi zomangamanga.Aliyense ali ndi zinthu zapadera zomwe zimawapangitsa kukhala oyenera pazolinga zosiyanasiyana.Tiyeni tifanizire mozama kuti tiwone yemwe ali bwino muzochitika zosiyanasiyana.
1. Tanthauzo ndi kamangidwe:
CMC (carboxymethylcellulose): CMC ndi chochokera m'madzi chosungunuka cha cellulose chomwe chimapangidwa ndi momwe cellulose ndi chloroacetic acid zimayendera.Lili ndi magulu a carboxymethyl (-CH2-COOH) omwe amalumikizana ndi magulu ena a hydroxyl a glucopyranose monomers omwe amapanga msana wa cellulose.
HPMC (hydroxypropyl methylcellulose): HPMC ndi chochokera m'madzi chosungunuka cha cellulose chomwe chimapangidwa pochiza mapadi ndi propylene oxide ndi methyl chloride.Lili ndi magulu a hydroxypropyl ndi methoxy omwe amamangiriridwa pamsana wa cellulose.
2. Kusungunuka:
CMC: Kusungunuka kwambiri m'madzi, kupanga njira yowonekera, yowoneka bwino.Imawonetsa machitidwe a pseudoplastic otaya, zomwe zikutanthauza kuti mamasukidwe ake amachepa pansi pa kupsinjika kwa shear.
HPMC: Komanso sungunuka m'madzi, kupanga njira ya viscous pang'ono kuposa CMC.Ikuwonetsanso khalidwe la pseudoplastic.
3. Rheological properties:
CMC: Imawonetsa kumeta ubweya wa ubweya, zomwe zikutanthauza kuti kukhuthala kwake kumachepa ndi kuchuluka kwa kumeta ubweya.Katunduyu amapangitsa kuti ikhale yoyenera kugwiritsidwa ntchito komwe kukhuthala kumafunika koma yankho liyenera kuyenda mosavuta pansi pa kukameta ubweya, monga utoto, zotsukira ndi mankhwala.
HPMC: imawonetsa machitidwe ofananirako a CMC, koma kukhuthala kwake nthawi zambiri kumakhala kokwera kwambiri pamlingo wochepa.Ili ndi mawonekedwe opangira mafilimu abwinoko, ndikupangitsa kuti ikhale yoyenera kugwiritsa ntchito monga zokutira, zomatira komanso zowongolera zotulutsa mankhwala.
4. Kukhazikika:
CMC: Imakhala yokhazikika pamitundu yambiri ya pH ndi kutentha.Imatha kulekerera milingo yocheperako ya electrolyte.
HPMC: Yokhazikika kwambiri kuposa CMC pansi pa mikhalidwe ya acidic, koma imatha kukumana ndi hydrolysis pansi pamikhalidwe yamchere.Zimakhudzidwanso ndi ma divalent cations, omwe angayambitse gelation kapena mpweya.
5. Kugwiritsa ntchito:
CMC: amagwiritsidwa ntchito kwambiri monga thickener, stabilizer ndi madzi kusunga wothandizira chakudya (monga ayisikilimu, msuzi), mankhwala (monga mapiritsi, kuyimitsidwa) ndi zodzoladzola (monga zonona, mafuta odzola) mafakitale.
HPMC: Amagwiritsidwa ntchito pomanga zinthu (monga zomatira matailosi a simenti, pulasitala, matope), mankhwala (monga mapiritsi otulutsidwa, opangira maso), ndi zodzoladzola (monga madontho a m'maso, zosamalira khungu).
6. Kuopsa ndi chitetezo:
CMC: Imadziwika kuti ndi yotetezeka (GRAS) ndi mabungwe oyang'anira ikagwiritsidwa ntchito m'malire odziwika pazakudya ndi mankhwala.Ndi biodegradable ndipo si poizoni.
HPMC: Imawonedwanso kuti ndi yotetezeka kuti igwiritsidwe ntchito mkati mwa malire ovomerezeka.Ndi biocompatible ndipo imagwiritsidwa ntchito kwambiri m'munda wamankhwala ngati chowongolera chotulutsa komanso chomangira mapiritsi.
7. Mtengo ndi kupezeka:
CMC: Zotsika mtengo kuposa HPMC.Imapezeka mosavuta kuchokera kwa ogulitsa osiyanasiyana padziko lonse lapansi.
HPMC: Yokwera mtengo pang'ono chifukwa cha kupanga kwake komanso nthawi zina zochepa zochokera kwa ogulitsa ena.
8. Kukhudza chilengedwe:
CMC: Biodegradable, yochokera ku chuma chongowonjezwdwa (ma cellulose).Amaonedwa kuti ndi ochezeka ndi chilengedwe.
HPMC: Komanso biodegradable ndipo anachokera mapadi, koteronso kwambiri zachilengedwe.
Onse a CMC ndi HPMC ali ndi zinthu zapadera zomwe zimawapangitsa kukhala zowonjezera m'mafakitale ambiri.Kusankha pakati pawo kumadalira zofunikira zenizeni zogwiritsira ntchito monga kusungunuka, kukhuthala, kukhazikika ndi kulingalira mtengo.Nthawi zambiri, CMC ikhoza kukondedwa chifukwa cha mtengo wake wotsika, kukhazikika kwa pH, komanso kukwanira pazakudya ndi zodzoladzola.HPMC, kumbali ina, ikhoza kuyanjidwa chifukwa cha kukhuthala kwake kwapamwamba, mawonekedwe abwino opanga mafilimu, komanso kugwiritsa ntchito mankhwala ndi zomangira.Pamapeto pake, kusankha kuyenera kukhazikitsidwa poganizira mozama za zinthu izi komanso kugwirizana ndi zomwe akufuna.
Nthawi yotumiza: Feb-21-2024