Kuti tienzanise CMC (carboxymethylcellulose) neHPMC (hydroxypropylmethylcellulose), tinofanira kunzwisisa hunhu hwadzo, mashandisirwo adzo, zvakanakira, zvadzinokanganisa, uye mikana yekushandisa. Zvese zviri zviviri cellulose derivatives zvinoshandiswa zvakanyanya mumaindasitiri akasiyana-siyana, kusanganisira mishonga, chikafu, zvizoro uye kuvaka. Imwe neimwe ine hunhu hwakasiyana hunoita kuti dzikwanise kushandiswa zvakasiyana. Ngatiite kuenzanisa kwakadzama kuti tione kuti ndeipi iri nani mumamiriro akasiyana.
1. Tsanangudzo uye chimiro:
CMC (carboxymethylcellulose): CMC chinhu chinonyungudika mumvura chinobva mu cellulose chinogadzirwa nekuita kwe cellulose ne chloroacetic acid. Chine mapoka e carboxymethyl (-CH2-COOH) akabatana nemamwe mapoka e hydroxyl e glucopyranose monomers anoumba musana we cellulose.
HPMC (hydroxypropyl methylcellulose): HPMC chinhu chinonyungudika mumvura chinobva mu cellulose chinogadzirwa nekushandisa propylene oxide nemethyl chloride. Chine hydroxypropyl ne methoxy groups zvakabatana ne cellulose backbone.
2. Kunyungudika:
CMC: Inonyungudika zvikuru mumvura, zvichiita mhinduro yakajeka uye yakamanikana. Inoratidza maitiro ekuyerera kwepurasitiki, zvinoreva kuti viscosity yayo inoderera kana yave kumanikidzwa.
HPMC: Inonyungudikawo mumvura, zvichiita kuti ive solution yakamanikana zvishoma pane CMC. Inoratidzawo maitiro epseudoplastic.
3. Hunhu hweRheological:
CMC: Inoratidza maitiro ekutetepa kweganda, zvinoreva kuti kupenya kwayo kunoderera nekuwedzera kwekutetepa kweganda. Hunhu uhwu hunoita kuti ive yakakodzera kushandiswa uko kunodiwa kukora asi mhinduro yacho inofanira kuyerera zviri nyore pasi pekutetepa, zvakaita sependi, sipo nemishonga.
HPMC: ine maitiro akafanana neCMC, asi viscosity yayo inowanzo kuve yakakwira kana iine huwandu hwakaderera. Ine hunhu huri nani hwekugadzira firimu, zvichiita kuti ikwanise kushandiswa senge machira, manamatisi uye mishonga inoburitswa nemutemo.
4. Kugadzikana:
CMC: Kazhinji inogara yakagadzikana pamusoro pe pH netembiricha yakasiyana-siyana. Inogona kushivirira huwandu hwema electrolyte huri pakati nepakati.
HPMC: Yakasimba kupfuura CMC kana iri mumamiriro eacidic, asi inogona kunyungudika kana iri mumamiriro ealkaline. Inonzwawo ma divalent cations, izvo zvinogona kukonzera gelation kana mvura.
5. Kushandiswa:
CMC: inoshandiswa zvakanyanya sechinosimbisa, chinosimbisa uye chinochengetedza mvura muzvikafu (zvakadai se ice cream, muto), mishonga (yakadai semapiritsi, suspension) uye maindasitiri ezvizoro (zvakadai se cream, lotion).
HPMC: Inoshandiswa zvakanyanya muzvinhu zvekuvaka (semuenzaniso, zvinonamira zvemataira esimende, plaster, mortar), mishonga (semuenzaniso, mapiritsi anodzorwa nemutemo, mishonga yemaziso), uye zvizoro (semuenzaniso, madonhwe emaziso, zvigadzirwa zvekuchengetedza ganda).
6. Chepfu uye kuchengetedzeka:
CMC: Inowanzo zivikanwa seyakachengeteka (GRAS) nemasangano anotonga kana ikashandiswa mukati memiganhu yakatarwa mukushandiswa kwechikafu nemishonga. Inoora uye haina chepfu.
HPMC: Inoonekwawo seyakachengeteka kudyiwa mukati memiganhu inokurudzirwa. Inoshanda mumuviri uye inoshandiswa zvakanyanya mumunda wemishonga semushonga unodzorwa uye unosunga mapiritsi.
7. Mutengo uye Kuwanikwa Kwazvo:
CMC: Kazhinji inodhura zvishoma pane HPMC. Inowanikwa zviri nyore kubva kuvatengesi vakasiyana-siyana pasi rese.
HPMC: Inodhura zvishoma nekuda kwemaitiro ayo ekugadzira uye dzimwe nguva kuwanikwa kwayo kushoma kubva kune vamwe vatengesi.
8. Kukanganiswa kwezvakatipoteredza:
CMC: Inoora, inobva muzvinhu zvinogona kushandiswazve (cellulose). Inoonekwa seyakachengeteka kune zvakatipoteredza.
HPMC: Inoora zvakare uye inobva mu cellulose, saka zvakare isingakuvadzi nharaunda.
Zvese CMC neHPMC zvine hunhu hwakasiyana hunovaita kuti zvive zvinhu zvinobatsira mumaindasitiri akasiyana-siyana. Kusarudzwa pakati pazvo kunoenderana nezvinodiwa pakushandiswa kwacho zvakaita sekunyunguduka, kusimba, kugadzikana uye kukoshesa mari. Kazhinji, CMC inogona kusarudzwa nekuda kwemutengo wayo wakaderera, kusimba kwakakura kwepH, uye kukodzera kushandiswa kwechikafu nekwekushongedza. Kune rumwe rutivi, HPMC inogona kudiwa nekuda kwekusimba kwayo kwakanyanya, hunhu huri nani hwekugadzira firimu, uye kushandiswa mumishonga nezvinhu zvekuvaka. Pakupedzisira, kusarudzwa kunofanirwa kuenderana nekufunga kwakazara nezvezvinhu izvi uye kuenderana nekushandiswa kwaunoda.
Nguva yekutumira: Kukadzi-21-2024