Alaye ipilẹ ti Hydroxyethyl Methyl Cellulose

Orukọ ọja:hydroxyethyl methyl celluloseHEMC

Orukọ Gẹẹsi: Hymetellose

Alias: methyl hydroxyethyl cellulose; MHEC, hydroxyethyl methyl cellulose ether;

hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose

English inagijẹ: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]

Kemistri: Hydroymethylmethylecellulose; Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.

Molecules: C2H6O2 xCH4O x PhEur 2002 asọye hydroxyethylmethylcellulose bi O-methylated apa kan, O-hydroxymethylated cellulose. Awọn pato pato jẹ afihan ni awọn ofin ti iki ti o han ni awọn mPa s ti 2% w/v ojutu olomi ni 20°C.

Ìwúwo molikula: PhEur 2002 ṣe asọye hydroxyethylmethylcellulose gẹgẹ bi apakan O-methylated, apakan O-hydroxymethylated cellulose. Awọn pato pato jẹ afihan ni awọn ofin ti iki ti o han ni awọn mPa s ti 2% w/v ojutu olomi ni 20°C.

Awọn abuda akọkọ ti hydroxyethyl methyl cellulose (HEMC) jẹ:

1. Solubility: tiotuka ninu omi ati diẹ ninu awọn olomi-ara-ara, HEMC le ti wa ni tituka ni omi tutu, iṣeduro ti o pọju rẹ nikan ni ipinnu nipasẹ viscosity, solubility yato pẹlu viscosity, isalẹ iki, ti o pọju.

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

3. Iṣẹ ṣiṣe oju: Bi ojutu olomi ti ni iṣẹ iṣẹ ṣiṣe dada, o le ṣee lo bi oluranlowo aabo colloid, emulsifier ati dispersant.

4. Gbona jeli: Nigba ti ọja HEMC olomi ojutu ti wa ni kikan si kan awọn iwọn otutu, o di akomo, gels, ati awọn fọọmu a precipitate, sugbon nigba ti o ti wa ni continuously tutu, o pada si awọn atilẹba ojutu ipinle, ati yi jeli 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 pe ko ni iṣelọpọ ati pe o ni oorun kekere ati lofinda.

6. Antifungal: HEMC ni agbara antifungal ti o dara ati iduroṣinṣin viscosity ti o dara lakoko ipamọ igba pipẹ.

7. PH iduroṣinṣin: Awọn viscosity ti HEMC ọja olomi ojutu 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 methyl cellulose le ṣee lo bi colloid aabo oluranlowo, emulsifier ati dispersant nitori awọn dada lọwọ iṣẹ ti olomi ojutu. Apeere ti ohun elo rẹ jẹ bi atẹle: Ipa ti hydroxyethyl methyl cellulose lori awọn ohun-ini ti simenti. Hydroxyethyl methylcellulose jẹ alaini oorun, adun, lulú funfun ti ko ni majele ti o tuka ninu omi tutu lati ṣe agbekalẹ ti o han gbangba, ojutu viscous. O ni o ni awọn ohun-ini ti nipọn, abuda, pipinka, emulsifying, film-forming, suspending, adsorbing, gelling, dada-lọwọ, idaduro ọrinrin ati idaabobo colloid. Nitori iṣẹ ṣiṣe dada ti ojutu olomi, o le ṣee lo bi oluranlowo aabo colloid, emulsifier ati dispersant. Hydroxyethyl methyl cellulose olomi ojutu ni hydrophilicity ti o dara ati pe o jẹ oluranlowo mimu omi ti o ga julọ.