Bambancin Tsakanin HPMC da HEC

Dukansu hydroxypropyl methylcellulose da hydroxyethyl cellulose sune cellulose, menene bambanci tsakanin su biyun?

"Bambancin Tsakanin HPMC da HEC"

01 HPMC da HEC
Hydroxypropyl methylcellulose (Hypromellose), kuma aka sani da hypromellose, wani nau'i ne na cellulose wanda ba na ionic ba. Semisynthetic ne, mara aiki, polymer viscoelastic da aka saba amfani da shi azaman mai mai a cikin ilimin ido, ko azaman abin haɓakawa ko abin hawa a cikin magungunan baka.
Hydroxyethyl cellulose (HEC), dabarar sinadarai (C2H6O2) n, fari ne ko haske rawaya, mara wari, fibrous mara guba ko foda mai ƙarfi wanda ya ƙunshi alkaline cellulose da ethylene oxide (ko chloroethanol) An shirya shi ta hanyar etherification kuma yana cikin waɗanda ba: ionic soluble cellulose ethers. Saboda HEC yana da kyawawan kaddarorin thickening, dakatarwa, watsawa, emulsifying, bonding, ƙirƙirar fim, kare danshi da samar da colloid mai kariya, an yi amfani dashi sosai a cikin binciken mai, sutura, gini, magani da abinci, yadi, takarda da polymer polymerization. da sauran filayen, 40 raga sieving rate ≥ 99%.

02 bambanci
Kodayake duka biyun cellulose ne, akwai bambance-bambance da yawa tsakanin su biyun:
Hydroxypropyl methylcellulose da hydroxyethylcellulose sun bambanta a cikin kaddarorin, amfani, da solubility.

1. Daban-daban fasali
Hydroxypropyl methylcellulose: (HPMC) fari ne ko irin wannan farin fiber ko granular foda, mallakar nau'ikan nonionic cellulose gauraye ethers. Shi ne Semi-Synthetic wanda ba mai rai viscoelastic polymer.
Hydroxyethylcellulose: (HEC) fari ne ko rawaya, mara wari kuma fiber mara guba ko foda mai ƙarfi. Ana cire shi ta hanyar alkaline cellulose da ethylene oxide (ko chlorohydrin). Nasa ne ga wadanda ba ionic soluble cellulose ether.

2. Solubility daban-daban
Hydroxypropyl methylcellulose: kusan maras narkewa a cikin cikakken ethanol, ether da acetone. Maganin colloidal bayyananne ko ɗan ƙaramin girgije yana narkar da cikin ruwan sanyi.
Hydroxyethyl cellulose: Yana yana da Properties na thickening, suspending, dauri, emulsifying, watsawa da moisturizing. Zai iya shirya mafita a cikin jeri daban-daban na danko kuma yana da kyakkyawar solubility na gishiri don masu amfani da lantarki.
Hydroxypropyl methylcellulose yana da halaye na ƙarfin ƙarfi, ƙarancin juriya na gishiri, kwanciyar hankali na pH, riƙewar ruwa, kwanciyar hankali mai girma, kyawawan abubuwan ƙirƙirar fim, juriya mai yawa, rarrabuwa da haɗin kai.

Akwai bambance-bambance da yawa tsakanin su biyun, kuma amfanin su a cikin masana'antar ma ya bambanta.

Hydroxypropyl methylcellulose ne mafi yawa amfani da thickener, dispersant da stabilizer a shafi masana'antu, kuma yana da kyau solubility a cikin ruwa ko Organic kaushi. A cikin masana'antar gine-gine, ana iya amfani da shi a cikin siminti, gypsum, latex putty, plaster, da dai sauransu, don inganta rarrabuwar yashi na ciminti kuma yana inganta haɓakar filastik da ruwa na turmi.
Hydroxyethyl cellulose yana da kaddarorin thickening, suspending, dauri, emulsifying, dispersing da moisturizing. Zai iya shirya mafita a cikin jeri daban-daban na danko kuma yana da kyakkyawar solubility na gishiri don masu amfani da lantarki. Hydroxyethyl cellulose wani ingantaccen fim ne tsohon, tackifier, thickener, stabilizer da dispersant a shampoos, gashi sprays, neutralizers, conditioners da kayan shafawa; a cikin wanke foda A tsakiya akwai nau'in wakili na sake gyara datti. Hydroxyethyl cellulose yana narkewa da sauri a babban zafin jiki, wanda zai iya hanzarta aikin samarwa da haɓaka haɓakar samarwa. Siffar siffa na kayan wanke-wanke mai ɗauke da hydroxyethyl cellulose shine cewa yana iya haɓaka santsi da haɗewar yadudduka.