Bambanci Tsakanin HPMC da HEC

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

"Bambanci Tsakanin HPMC da HEC"

01 HPMC da HEC
Hydroxypropyl methylcellulose (Hypromellose), wanda kuma aka sani da hypromellose, wani nau'in ether ne na gauraye na cellulose wanda ba ionic ba. Yana da wani polymer mai kama da na halitta, mara aiki, mai kama da viscoelastic wanda aka saba amfani da shi azaman mai shafawa a fannin ido, ko kuma azaman abin da ke taimakawa wajen magance matsalolin ido.
Hydroxyethyl cellulose (HEC), wani tsari ne na sinadarai (C2H6O2)n, fari ne ko rawaya mai haske, mara wari, mara guba, mai kama da fibrous ko foda mai ƙarfi wanda ya ƙunshi alkaline cellulose da ethylene oxide (ko chloroethanol). Ana shirya shi ta hanyar etherification kuma yana cikin ƙwayoyin cellulose masu narkewa marasa ionic. Saboda HEC yana da kyawawan halaye na kauri, dakatarwa, wargazawa, emulsifying, haɗawa, ƙirƙirar fim, kare danshi da samar da colloid mai kariya, an yi amfani da shi sosai a binciken mai, shafi, gini, magani da abinci, yadi, takarda da polymer Polymerization da sauran fannoni, 40 mesh sieving rate ≥ 99%.

02 bambanci
Duk da cewa dukkansu suna da cellulose, akwai bambance-bambance da yawa tsakanin su biyun:
Hydroxypropyl methylcellulose da hydroxyethylcellulose sun bambanta a cikin halaye, amfani, da kuma yadda za su narke.

1. Sifofi daban-daban
Hydroxypropyl methylcellulose: (HPMC) fari ne ko makamancin haka na zare ko foda mai siffar granular, mallakar nau'ikan ethers daban-daban na cellulose gauraye. Polymer ne mai kama da na roba wanda ba shi da rai.
Hydroxyethylcellulose: (HEC) fari ne ko rawaya, mara ƙamshi kuma mara guba. Ana fitar da shi ta hanyar sinadarin alkaline cellulose da ethylene oxide (ko chlorohydrin). Yana cikin cellulose ether wanda ba ionic ba ne mai narkewa.

2. Narkewa daban-daban
Hydroxypropyl methylcellulose: kusan ba ya narkewa a cikin cikakken ethanol, ether da acetone. Maganin colloidal mai haske ko ɗan gajimare wanda aka narkar a cikin ruwan sanyi.
Hydroxyethyl cellulose: Yana da kaddarorin kauri, dakatarwa, ɗaurewa, emulsifying, warwatsewa da kuma danshi. Yana iya shirya mafita a cikin nau'ikan danko daban-daban kuma yana da kyakkyawan narkewar gishiri ga electrolytes.
Hydroxypropyl methylcellulose yana da halaye na ƙarfin kauri, ƙarancin juriya ga gishiri, kwanciyar hankali na pH, riƙe ruwa, kwanciyar hankali na girma, kyawawan halayen samar da fim, juriya mai yawa ga enzyme, warwatsewa da haɗin kai.

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

Ana amfani da Hydroxypropyl methylcellulose galibi a matsayin mai kauri, mai wargazawa da kuma mai daidaita yanayi a masana'antar shafa, kuma yana da kyakkyawan narkewa a cikin ruwa ko sinadarai masu narkewa na halitta. A masana'antar gini, ana iya amfani da shi a cikin siminti, gypsum, latex putty, plaster, da sauransu, don inganta wargazawar yashi na siminti da kuma inganta girman turmi da kuma riƙe ruwa sosai.
Hydroxyethyl cellulose yana da halaye na kauri, dakatarwa, ɗaurewa, emulsifying, warwatsewa da kuma danshi. Yana iya shirya mafita a cikin nau'ikan danko daban-daban kuma yana da kyakkyawan narkewar gishiri ga electrolytes. Hydroxyethyl cellulose wani ingantaccen fim ne mai kauri, mai kauri, mai daidaita da kuma mai warwatsewa a cikin shamfu, feshin gashi, masu kaushi, masu sanyaya da kuma kayan kwalliya; a cikin foda na wankewa A tsakiya akwai wani nau'in wakili na sake sanya datti. Hydroxyethyl cellulose yana narkewa da sauri a yanayin zafi mai yawa, wanda zai iya hanzarta tsarin samarwa da inganta ingancin samarwa. Babban fasalin sabulun da ke ɗauke da hydroxyethyl cellulose shine cewa yana iya inganta santsi da kuma mercerization na yadudduka.