Chii chinonzi hydroxyethyl methylcellulose?

zita: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Chirungu aliases: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Chemistry: Hydroymethylmethylcellulose;Hydroxyethyl methylcellulose; Hydroxymethylethylcellulose.
Kunyoresa kweCAS: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 inotsanangura hydroxyethyl methylcellulose sechikamu cheO-methylated, chikamu O-hydroxymethylated cellulose. Kutsanangurwa kwakasiyana kunoratidzwa neinooneka viscosity kukosha kwe2% w/v aqueous solution pa20°C, uye unit iri mPa s.
Molecular uremu: PhEur 2002 inotsanangura hydroxyethyl methylcellulose sechikamu cheO-methylated, chikamu O-hydroxymethylated cellulose. Kutsanangurwa kwakasiyana kunoratidzwa neinooneka viscosity kukosha kwe2% w/v aqueous solution pa20°C, uye unit iri mPa s.

Iwo makuru maitiro ehydroxyethyl methylcellulose (HEMC) ndeaya:

1. Solubility: Solubility mumvura uye zvimwe organic solvents. HEMC inogona kunyungudika mumvura inotonhora. Kunyanya kwayo kwepamusoro kunongogadziriswa ne viscosity. Solubility inosiyana ne viscosity. Iyo yakaderera viscosity, iyo yakakura solubility.

2. Kuramba kwemunyu: HEMC zvigadzirwa hazvisi-ionic cellulose ethers uye haisi polyelectrolytes, saka inenge yakagadzikana mumagetsi emvura kana simbi yemunyu kana organic electrolytes iripo, asi kuwedzera kwakanyanya kwe electrolytes kunogona kukonzera gelation uye kunaya kwemvura.

3. Chiitiko chepamusoro: Pamusana pebasa rinoshanda remushonga wemvura, inogona kushandiswa secolloidal protective agent, emulsifier uye dispersant.

4. Thermal gel: Kana HEMC chigadzirwa chemvura chinogadzirisa chinopisa kune imwe tembiricha, chinova opaque, gels, uye precipitates, asi kana ichiramba ichitonhorera, inodzokera kune yekutanga kugadzirisa mamiriro, uye gel uye kunaya kwemvura kunoitika. Iyo tembiricha inonyanya kuenderana nemafuta avo, kumisa aids, inodzivirira colloids, emulsifiers, nezvimwe.

5. Metabolic inertness uye kunhuhwirira kwakaderera uye kunhuhwirira: HEMC inoshandiswa zvakanyanya mukudya nemishonga nokuti haizogadziriswi uye ine kunhuhwirira kwakaderera uye kunhuhwirira.

6. Mildew resistance: HEMC ine huturu hwakanaka hunodzivirira uye yakanaka viscosity kugadzikana panguva yekuchengetedza kwenguva refu.

7. PH kugadzikana: The viscosity yeaqueous solution yeHEMC zvigadzirwa hazvibviri kukanganiswa neasidhi kana alkali, uye pH inokosha inenge yakagadzikana muhuwandu hwe3.0-11.0.
Kushandisa: Hydroxyethyl methylcellulose inogona kushandiswa se colloidal inodzivirira agent, emulsifier uye dispersant nekuda kwekushanda kwayo kwepamusoro mumushonga wemvura. Muenzaniso wayo wekushandisa ndeuyu: pesvedzero yehydroxyethyl methylcellulose pakuita simende. Hydroxyethyl methylcellulose inonhuhwirira, isinganakidze, isina-chepfu chena poda inogona kunyungudutswa mumvura inotonhora kuti igadzire inoonekera. Iine maitiro ekukora, kusunga, kuparadzira, emulsifying, firimu-kuumba, kumisa, adsorbing, gelling, pamusoro pekushanda, kuchengetedza unyoro nekudzivirira colloid. Sezvo iyo aqueous mhinduro ine pamusoro inoshanda basa, inogona kushandiswa se colloidal inodzivirira agent, emulsifier uye dispersant. Hydroxyethyl methylcellulose aqueous solution ine yakanaka hydrophilicity uye inoshanda inochengetedza mvura.