Kini hydroxyethyl methylcellulose?

inagijẹ: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Awọn inagijẹ Gẹẹsi: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Kemistri: Hydroymethylmethylcellulose;Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.
CAS Iforukọ: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 asọye hydroxyethyl methylcellulose bi O-methylated apakan, O-hydroxymethylated cellulose. Awọn alaye oriṣiriṣi jẹ afihan nipasẹ iye viscosity ti o han ti 2% w/v ojutu olomi ni 20°C, ati ẹyọ naa jẹ mPa s.
Ìwúwo molikula: PhEur 2002 ṣe asọye hydroxyethyl methylcellulose gẹgẹbi O-methylated apakan, O-hydroxymethylated cellulose. Awọn pato ni pato jẹ afihan nipasẹ iye viscosity ti o han ti 2% w/v ojutu olomi ni 20°C, ati ẹyọ naa jẹ mPa s.

Awọn abuda akọkọ ti hydroxyethyl methylcellulose (HEMC) jẹ:

1. Solubility: Soluble ninu omi ati diẹ ninu awọn nkan ti o nfo omi. HEMC le ni tituka ni omi tutu. Idojukọ ti o ga julọ jẹ ipinnu nipasẹ iki nikan. Solubility yatọ pẹlu iki. Isalẹ awọn iki, ti o tobi ni solubility.

2. Iyọ iyọ: Awọn ọja HEMC jẹ awọn ethers cellulose ti kii-ionic ati kii ṣe polyelectrolytes, nitorina wọn jẹ iduroṣinṣin ni awọn iṣeduro olomi nigbati awọn iyọ irin tabi awọn eleto eleto ti o wa, ṣugbọn afikun afikun ti awọn elekitiroti le fa gelation ati ojoriro.

3. Iṣẹ-ṣiṣe oju-aye: Nitori iṣẹ-ṣiṣe ti o wa ni oju-aye ti ojutu olomi, o le ṣee lo bi oluranlowo idaabobo colloidal, emulsifier ati dispersant.

4. Gbona jeli: Nigbati ọja HEMC olomi ojutu jẹ kikan si iwọn otutu kan, o di akomo, awọn gels, ati precipitates, ṣugbọn nigbati o ba tutu nigbagbogbo, o pada si ipo ojutu atilẹba, ati gel ati ojoriro waye. Iwọn otutu da lori awọn lubricants wọn, awọn iranlọwọ idaduro, awọn colloid aabo, emulsifiers, ati bẹbẹ lọ.

5. Aisedeede ti iṣelọpọ ati õrùn kekere ati lofinda: HEMC ti wa ni lilo pupọ ni ounjẹ ati oogun nitori kii yoo jẹ iṣelọpọ ati pe o ni oorun kekere ati lofinda.

6. Imuwodu resistance: HEMC ni o ni itọju imuwodu ti o dara julọ ati iduroṣinṣin iki ti o dara nigba ipamọ igba pipẹ.

7. PH iduroṣinṣin: Awọn iki ti awọn olomi ojutu ti HEMC awọn ọja ti wa ni o fee fowo nipasẹ acid tabi alkali, ati awọn pH iye jẹ jo idurosinsin ni ibiti o ti 3.0-11.0.
Ohun elo: Hydroxyethyl methylcellulose le ṣee lo bi oluranlowo aabo colloidal, emulsifier ati dispersant nitori iṣẹ ṣiṣe dada rẹ ni ojutu olomi. Apẹẹrẹ ohun elo rẹ jẹ bi atẹle: ipa ti hydroxyethyl methylcellulose lori iṣẹ simenti. Hydroxyethyl methylcellulose jẹ alainirun, adun, lulú funfun ti kii ṣe majele ti o le tuka ninu omi tutu lati ṣe ojutu viscous ti o han gbangba. O ni awọn abuda ti o nipọn, abuda, pipinka, emulsifying, film-forming, suspending, adsorbing, gelling, dada ti nṣiṣe lọwọ, mimu ọrinrin ati idaabobo colloid. Niwọn igba ti ojutu olomi naa ni iṣẹ ṣiṣe dada, o le ṣee lo bi oluranlowo aabo colloidal, emulsifier ati dispersant. Hydroxyethyl methylcellulose ojutu olomi ni hydrophilicity ti o dara ati pe o jẹ oluranlowo idaduro omi daradara.