Farqiga u dhexeeya HPMC iyo HEC

Labada hydroxypropyl methylcellulose iyo hydroxyethyl cellulose labaduba waa cellulose, waa maxay farqiga u dhexeeya labada?

Farqiga u dhexeeya HPMC iyo HEC

01 HPMC iyo HEC
Hydroxypropyl methylcellulose (Hypromellose), oo sidoo kale loo yaqaano hypromellose, waa nooc ka mid ah cellulose aan ionic ahayn oo isku qasan. Waa semisynthetic, aan firfircoonayn, polymer viscoelastic oo caadi ahaan loo isticmaalo saliidaha indhaha, ama qalab ahaan ama gaadiid ahaan dawooyinka afka.
Hydroxyethyl cellulose (HEC), qaacidada kiimikaad (C2H6O2) n, waa huruud cad ama iftiin ah, ur aan lahayn, aan sun ahayn fayraska ama budada adag oo ka kooban cellulose alkaline iyo ethylene oxide (ama chloroethanol) Waxaa lagu diyaariyaa etherification waxayna iska leedahay kuwa aan- ionic ethers cellulose milmay. Sababtoo ah HEC waxay leedahay sifooyin wanaagsan oo dhumucdiisuna waxay tahay, hakin, kala firdhiyo, emulsifying, bonding, film-samaynta, ilaalinta qoyaanka iyo bixinta kolloid ilaalinta, waxa si weyn loogu isticmaalay sahaminta saliidda, dahaarka, dhismaha, daawada iyo cuntada, dunta, waraaqaha iyo polymer Polymerization. iyo meelaha kale, 40 mesh heerka shaandhaynta mesh ≥ 99%.

02 kala duwanaansho
Inkasta oo labaduba ay yihiin cellulose, waxaa jira farqi badan oo u dhexeeya labada:
Hydroxypropyl methylcellulose iyo hydroxyethylcellulose waxay ku kala duwan yihiin sifooyinka, isticmaalka, iyo milanka.

1. Sifooyin kala duwan
Hydroxypropyl methylcellulose: (HPMC) waa cad ama fiber cad oo la mid ah ama budada granular, oo ka tirsan noocyo kala duwan oo ah cellulose nonionic ethers. Waa polymer viscoelastic semi-synthetic ah oo aan noolayn.
Hydroxyethylcellulose: (HEC) waa caddaan ama huruud ah, aan ur lahayn oo aan sun ahayn fiber ama budo adag. Waxaa lagu daaweeyaa cellulose alkaline iyo ethylene oxide (ama chlorohydrin). Waxay ka tirsan tahay ether-ka cellulose soluble ee aan ionic ahayn.

2. Kala duwanaansho
Hydroxypropyl methylcellulose: ku dhawaad ​​aan lagu milmi karin ethanol, ether iyo acetone. Xalka kolloidal ee cad ama xoogaa daruuro leh oo lagu milmay biyo qabow.
Hydroxyethyl cellulose: Waxay leedahay sifooyinka dhumucda, laalidda, xidhitaanka, emulsifying, firdhisan iyo qoyaan. Waxay diyaarin kartaa xalal noocyo kala duwan oo viscosity ah waxayna leedahay milmi milix ah oo aad u fiican oo loogu talagalay electrolytes.
Hydroxypropyl methylcellulose waxay leedahay sifooyinka awoodda dhumucda, iska caabbinta milixda hoose, xasilloonida pH, haynta biyaha, xasilloonida cabbirka, sifooyinka filim samaynta heer sare ah, caabbinta enzyme ballaaran, kala-baxsanaanta iyo isku xirnaanta.

Waxaa jira farqi badan oo u dhexeeya labada, iyo faa'iidooyinkooda warshadaha sidoo kale aad bay u kala duwan yihiin.

Hydroxypropyl methylcellulose waxaa inta badan loo isticmaalaa dhumuc ahaan, kala firdhiya iyo xasilinta warshadaha daahan, oo waxay leedahay milmayn wanaagsan ee biyaha ama dareerayaasha organic. Warshadaha dhismaha, waxaa loo isticmaali karaa sibidhka, gypsum, dhajinta cinjirka, malaasta, iwm., si loo hagaajiyo kala firdhinta ciidda sibidhka oo si weyn u wanaajiso caagagga iyo haynta biyaha ee hoobiye.
Hydroxyethyl cellulose waxay leedahay sifooyinka dhumucda, laalidda, xidhitaanka, emulsifying, firdhisan iyo qoyaan. Waxay diyaarin kartaa xalal noocyo kala duwan oo viscosity ah waxayna leedahay milmi milix ah oo aad u fiican oo loogu talagalay electrolytes. Hydroxyethyl cellulose waa filim wax ku ool ah oo hore, tackifier, dhumuc weyn, xasiliye iyo kala firdhiyaa shaambada, buufinta timaha, dhexdhexaadiyeyaasha, qaboojiyaha iyo waxyaalaha la isku qurxiyo; marka budada lagu dhaqo Dhexda waxaa ku yaal nooc ka mid ah walxaha dib u soo celinta wasakhda. Hydroxyethyl cellulose waxay si dhakhso ah u milmaan heerkul sare, taas oo dedejin karta habka wax soo saarka iyo hagaajinta waxtarka wax soo saarka. Sifada cad ee saabuunta ay ku jirto hydroxyethyl cellulose waa in ay wanaajiso jilicsanaanta iyo ka ganacsiga dharka.