Hordhaca Hydroxyethyl Methyl Cellulose HEMC

Macluumaadka aasaasiga ah eeHydroxyethyl Methyl Cellulose

Magaca Shiinaha: hydroxyethyl methyl cellulose
Magaca Ingiriisiga: Hymetellose328
Magaca Shiinaha: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Ingiriisiga oo loo yaqaan: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Kiimikada: Hydroymethylmethylecellulose; Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.

Molecules: C2H6O2 xCH4O x PhEur 2002 waxay qeexaysaa hydroxyethylmethylcellulose qayb ahaan O-methylated, qayb ahaan O-hydroxymethylated cellulose. Tilmaamaha kala duwan ayaa lagu muujiyay marka la eego viscosity-ka muuqda ee mPas ee 2% w/v xal aqueous ah 20°C.
Miisaanka unugyada: PhEur 2002 wuxuu qeexayaa hydroxyethylmethylcellulose qayb ahaan O-methylated, qayb ahaan O-hydroxymethylated cellulose. Tilmaamaha kala duwan ayaa lagu muujiyay marka la eego viscosity-ka muuqda ee mPas ee 2% w/v xal aqueous ah 20°C.

Astaamaha ugu muhiimsan ee hydroxyethyl methyl cellulose (HEMC) waa:

1. Solubility: ku milmay biyaha iyo qaar ka mid ah dareerayaasha organic, HEMC waxaa lagu milmi karaa biyo qabow, xoojinta ugu badan waxaa lagu go'aamiyaa oo kaliya by viscosity, solubility kala duwan yahay viscosity, hoose viscosity, ka weyn ee milanka.

2. Cusbada iska caabbinta: Alaabooyinka HEMC waa kuwa aan-ionic cellulose ethers ah oo aan ahayn polyelectrolytes, markaa joogitaanka cusbada birta ah ama electrolytes organic, waxay ku xasilan yihiin xalalka aqueous, laakiin ku darida xad-dhaafka ah ee electrolytes waxay keeni kartaa gelation iyo roobab.

3. Dhaqdhaqaaqa dusha sare: Maaddaama uu xalka aqueous leeyahay shaqada dhaqdhaqaaqa dusha, waxa loo isticmaali karaa sida wakiilka difaaca kolloid, emulsifier iyo kala firdhiso.

4. Gel kuleyl ah: Marka sheyga HEMC ee dareeraha aqueous lagu kululeeyo heerkul gaar ah, wuxuu noqdaa mid mugdi ah, jel ah, oo sameeya roobab, laakiin marka si joogto ah loo qaboojiyo, waxay ku soo noqotaa xalalka asalka ah, iyo jeelkan iyo roobka ayaa dhacaya. . Heerkulku wuxuu inta badan ku xiran yahay saliidaha, qalabka joojinta, kolloysyada ilaalinta, emulsifiers, iwm.

5. Dheef-shiid kiimikaad iyo ur yar iyo udgoon: HEMC si weyn ayaa loogu isticmaalaa cuntada iyo daawada sababtoo ah maaha mid dheef-shiid kiimikaad ah oo leh ur iyo udgoon yar.

6. Antifungal: HEMC waxay leedahay awood antifungal wanaagsan iyo xasilloonida viscosity wanaagsan inta lagu jiro kaydinta muddada dheer.

7. xasiloonida PH: viscosity eeHEMCAashitada ama alkali waxay si dhib yar u saamaysaa xalalka aqueous-ka, iyo qiimaha pH waa mid deggan inta u dhaxaysa 3.0-11.0.

Codsiga: Hydroxyethyl methyl cellulose waxaa loo isticmaali karaa sida wakiilka ilaalinta kolloid, emulsifier iyo kala firdhiso ay sabab u tahay shaqada firfircoon ee dusha sare ee xal aqueous. Tusaale ahaan codsigeeda waa sida soo socota: Saamaynta hydroxyethyl methyl cellulose ee sifooyinka sibidhka. Hydroxyethyl methylcellulose waa ur aan ur lahayn, dhadhamin, budo cad oo aan sun ahayn taasoo ku milmi biyo qabow si ay u samayso xal cad oo muuqda. Waxay leedahay sifooyinka dhumucda, xidhidhiyaha, kala firdhiyo, emulsifying, film samaynta, laalista, adsorbing, gelling, dusha-firfircoon, ilaalinta qoyaan iyo ilaalinta kolloidyada. Sababtoo ah shaqada firfircoon ee dusha sare ee xalka aqueous, waxaa loo isticmaali karaa sida wakiilka ilaalinta kolloid, emulsifier iyo kala firdhiso. Hydroxyethyl methyl cellulose xal aqueous ah ayaa leh biyo nadiif ah oo wanaagsan waana wakiil biyo-hayn ah oo tayo sare leh.