Menene hydroxyethyl methylcellulose?

wanda ake kira: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Laƙabin Ingilishi: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Chemistry: Hydroymethylmethylcellulose;Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.
CAS rajista: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 yana bayyana hydroxyethyl methylcellulose azaman partially O-methylated, partially O-hydroxymethylated cellulose. Ana bayyana ƙayyadaddun ƙayyadaddun bayanai daban-daban ta zahirin ƙimar danko na 2% w/v maganin ruwa a 20°C, kuma sashin shine mPa s.
Nauyin kwayoyin halitta: PhEur 2002 ya bayyana hydroxyethyl methylcellulose a matsayin partially O-methylated, partially O-hydroxymethylated cellulose. Ana bayyana ƙayyadaddun ƙayyadaddun bayanai daban-daban ta zahirin ƙimar danko na 2% w/v maganin ruwa a 20°C, kuma sashin shine mPa s.

Babban halayen hydroxyethyl methylcellulose (HEMC) sune:

1. Solubility: Mai narkewa a cikin ruwa da wasu kaushi na halitta. Ana iya narkar da HEMC a cikin ruwan sanyi. Mafi girman maida hankalinsa ana ƙaddara ta danko ne kawai. Solubility ya bambanta da danko. Ƙananan danko, mafi girma da solubility.

2. Juriya na Gishiri: Abubuwan HEMC ba su ne ethers cellulose na ionic ba kuma ba polyelectrolytes ba, don haka suna da kwanciyar hankali a cikin maganin ruwa lokacin da salts na ƙarfe ko kwayoyin halitta sun kasance, amma ƙari mai yawa na electrolytes na iya haifar da gelation da hazo.

3. Surface aiki: Saboda da surface aiki aiki na ruwa bayani, shi za a iya amfani da a matsayin colloidal m wakili, emulsifier da dispersant.

4. Thermal gel: Lokacin da samfurin HEMC mai ruwa mai ruwa ya yi zafi zuwa wani zafin jiki, ya zama maras kyau, gels, da hazo, amma lokacin da aka ci gaba da sanyaya shi, ya dawo zuwa yanayin maganin asali, kuma gel da hazo ya faru. Yawan zafin jiki ya dogara da kayan shafawa, abubuwan dakatarwa, colloid masu kariya, emulsifiers, da sauransu.

5. Rashin kuzari da rashin wari da kamshi: HEMC ana amfani da shi sosai wajen abinci da magunguna domin ba zai zama mai narkewa ba kuma yana da karancin kamshi da kamshi.

6. Juriya na Mildew: HEMC yana da ingantacciyar juriya mai kyau da kwanciyar hankali mai kyau a lokacin ajiya na dogon lokaci.

7. PH kwanciyar hankali: Danko na ruwa bayani na HEMC kayayyakin ba shi da wuya acid ko alkali ya shafa, kuma pH darajar ne in mun gwada da barga a cikin kewayon 3.0-11.0.
Aikace-aikace: Hydroxyethyl methylcellulose za a iya amfani da a matsayin colloidal m wakili, emulsifier da dispersant saboda ta surface aiki aiki a cikin ruwa bayani. Misalin aikace-aikacensa shine kamar haka: tasirin hydroxyethyl methylcellulose akan aikin siminti. Hydroxyethyl methylcellulose wani wari ne, marar ɗanɗano, farin foda mara guba wanda za'a iya narkar da shi cikin ruwan sanyi don samar da bayani mai haske. Yana da halaye na thickening, dauri, dispersing, emulsifying, film-forming, suspending, adsorbing, gelling, surface aiki, rike danshi da kuma kare colloid. Tun da maganin ruwa yana da aikin aiki na surface, ana iya amfani dashi azaman wakili mai kariya na colloidal, emulsifier da dispersant. Hydroxyethyl methylcellulose aqueous bayani yana da kyau hydrophilicity kuma shi ne ingantaccen ruwa mai riƙe da ruwa.