Hordhac ku saabsan Hydroxyethyl Methyl Cellulose HEMC

Macluumaadka Aasaasiga ah eeCellulose-ka Hydroxyethyl Methyl

Magaca Shiinaha: hydroxyethyl methyl cellulose
Magaca Ingiriisiga: Hymetellose328
Magac kale oo Shiineys ah: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Magac kale oo Ingiriis ah: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Kiimikada: Hydroymethylmethylelecellulose; Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.

Molekuleyaasha: C2H6O2 xCH4O x PhEur 2002 wuxuu hydroxyethylmethylcellulose ku qeexayaa cellulose qayb ahaan O-methylated, qayb ahaan O-hydroxymethylated. Tilmaamaha kala duwan waxaa lagu muujiyaa marka la eego isku-dhafka muuqda ee mPa s ee xalka biyaha ee 2% w/v ee 20°C.
Miisaanka molecular-ka: PhEur 2002 wuxuu hydroxyethylmethylcellulose ku qeexayaa cellulose qayb ahaan O-methylated, qayb ahaan O-hydroxymethylated. Tilmaamaha kala duwan waxaa lagu muujiyaa marka la eego isku-dhafka muuqda ee mPa s ee xalka biyaha ee 2% w/v ee 20°C.

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

1. Milmida: waxaa lagu milmi karaa biyaha iyo qaar ka mid ah dareerayaasha dabiiciga ah, HEMC waxaa lagu milmi karaa biyo qabow, fiirsashada ugu badan waxaa lagu go'aamiyaa oo keliya viscosity, milmidu way kala duwan tahay viscosity, viscosity-ga hooseeya, milmidu way sii badanaysaa.

2. Iska caabbinta milixda: Badeecadaha HEMC waa kuwa aan ionic ahayn ee cellulose ethers mana aha polyelectrolytes, sidaa darteed marka ay joogaan milixda birta ama elektrolytyada dabiiciga ah, waxay ku xasilan yihiin xalalka biyaha, laakiin ku darista xad-dhaafka ah ee elektrolytyada waxay sababi kartaa jelitaanka iyo roobka.

3. Dhaqdhaqaaqa dusha sare: Maadaama xalka biyaha leh uu leeyahay shaqo firfircoon oo dusha sare ah, waxaa loo isticmaali karaa sidii wakiil ilaalin colloid ah, emulsifier iyo firdhiye.

4. Jel kuleyl: Marka xalka biyaha ee badeecada HEMC lagu kululeeyo heerkul gaar ah, wuxuu noqdaa mid aan caddayn, jel, wuxuuna sameeyaa daadad, laakiin marka si joogto ah loo qaboojiyo, wuxuu ku soo noqdaa xaaladdii xalka asalka ahayd, jelkan iyo roobabkuna way dhacaan. Heerkulku wuxuu inta badan ku xiran yahay saliidahooda, qalabka joojinta, kolloids-ka ilaalinta, emulsifiers, iwm.

5. Dabacsanaanta dheef-shiid kiimikaadka iyo urta iyo carafku yar yahay: HEMC si weyn ayaa loogu isticmaalaa cuntada iyo daawada sababtoo ah ma aha mid la dheefshiido oo leh ur iyo caraf yar.

6. Ka-hortagga fungal: HEMC waxay leedahay awood antifungal oo wanaagsan iyo xasillooni dheellitiran oo wanaagsan inta lagu jiro kaydinta muddada dheer.

7. Xasiloonida PH: Dheef-dhalashadaQalabka Caafimaadka Dadweynaha (HEMC)Xalka biyaha ee badeecada si dhib yar ayay u saameysaa aashitada ama alkali, qiimaha pH-kuna waa mid deggan inta u dhaxaysa 3.0-11.0.

Adeegsiga: Hydroxyethyl methyl cellulose waxaa loo isticmaali karaa sidii wakiil ilaalin colloid ah, emulsifier iyo firdhiye sababtoo ah shaqada firfircoon ee dusha sare ee xalka biyaha. Tusaale ahaan codsigeeda waa sidan soo socota: Saamaynta hydroxyethyl methyl cellulose ee sifooyinka sibidhka. Hydroxyethyl methylcellulose waa budo cad oo aan ur lahayn, dhadhan lahayn, aan sun ahayn oo ku milma biyo qabow si ay u samayso xal cad oo fiiqan. Waxay leedahay sifooyinka dhumucda, xidhitaanka, kala firdhinta, emulsifying, sameynta filim, joojinta, nuugista, jelling, firfircoonida dusha sare, ilaalinta qoyaanka iyo ilaalinta colloids. Sababtoo ah shaqada firfircoon ee dusha sare ee xalka biyaha, waxaa loo isticmaali karaa sidii wakiil ilaalin colloid ah, emulsifier iyo firdhiye. Xalka biyaha ee Hydroxyethyl methyl cellulose wuxuu leeyahay hydrophilicity wanaagsan waana wakiil ilaalin biyo oo waxtar sare leh.