Hydroxypropyl methylcellulose (Magaca INN: Hypromellulose), oo sidoo kale loo soo gaabiyo hydroxypropyl methylcellulose (HPMC), waa noocyo kala duwan oo ah ethers isku dhafan oo aan ionic ahayn.

Hydroxypropyl methylcellulose(Magaca INN:Hypromellulose), sidoo kale loo soo gaabiyo sidahydroxypropyl methylcellulose (HPMC), waa noocyo kala duwan oo ah cellulose isku dhafan oo aan ionic ahayn. Waa polymer nus-synthetic ah, aan firfircoonayn, viscoelastic ah oo badanaa loo isticmaalo saliid ahaan daaweynta indhaha, ama sida kaabis ama kaabiye daawada afka laga qaato, oo badanaa laga helo noocyo kala duwan oo badeecooyin ah.

Sida wax lagu daro cuntada, hydroxypropyl methylcellulose wuxuu ciyaari karaa doorarka soo socda: emulsifier, dhumuc-saare, wakiil joojin, iyo beddelka jelatin xayawaanka. Lambarkeeda Codex Alimentarius waa E464.

hantida kiimikada

Wax soo saarka dhammaaday eecellulose hydroxypropyl methylwaa budo cad ama cad oo dabacsan oo fiiber adag ah, oo leh cabbir walax ah oo dhex mara shaandho 80 mesh ah. Saamiyada kala duwan ee methoxy iyo hydroxypropyl content iyo viscosity ee badeecada la dhammeeyay ayaa ka dhigaya noocyo kala duwan oo leh kala duwanaansho waxqabadka. Waxay leedahay astaamaha ah inay ku milmi karto biyaha qabow oo aan ku milmi karin biyaha kulul oo la mid ah methylcellulose, milmideeda dareeraha dabiiciga ahna waxay ka badan tahay tan biyaha. Waxay ku milmi kartaa methanol aan biyo lahayn iyo ethanol, iyo sidoo kale hydrocarbons chlorine ah sida dichloromethane, trichloroethane, iyo dareerayaasha dabiiciga ah sida acetone, isopropanol, iyo alkolada diacetone. Marka lagu milmo biyaha, waxay la socotaa molecules biyaha si ay u samayso colloid. Waxay u deggan tahay asiidhyada iyo saldhigyada mana saameynayso heerka pH ee 2-12. Inkasta oo hydroxypropyl methylcellulose uusan sun ahayn, waa la guban karaa waxayna si xoog leh ula falgeli kartaa oksaydhiyeyaasha [5].

Dheef-dhalaalkawaxyaabaha HPMCWaxay kordhisaa marka la kordhiyo fiirsashada iyo miisaanka molecular-ka. Marka heerkulku kor u kaco, fiirsashada waxay bilaabataa inay hoos u dhacdo. Marka heerkulku gaaro heerkul gaar ah, fiirsashada si lama filaan ah ayay u kacdaa oo jel ayaa dhaca. Heerkulka jel-ka ee alaabada fiirsashada hoose ayaa ka sarreeya kan alaabada fiirsashada sare leh. Xalkeeda biyaha ku jira waa mid deggan heerkulka qolka guud ahaanna ma laha burburka fiirsashada marka laga reebo burburka enzymatic. Waxay leedahay sifooyin gaar ah oo jeleynta kulaylka, waxqabadka wanaagsan ee sameynta filimka iyo dhaqdhaqaaqa dusha sare.

Diyaarinta

Ka dib marka cellulose lagu daaweeyo alkali, anion-ka alkoxy-ga ee ka soo baxa hydroxyl deprotonation ayaa lagu dari karaa epoxy propane si loo soo saaro.cellulose hydroxypropyl ether; Waxa kale oo ay ku milmi kartaa methyl chloride si ay u soo saarto methyl cellulose ether. Marka labada falgalba ay isku mar dhacaan,cellulose hydroxypropyl methylwaa la soo saaraa.

ujeedo

Isticmaalkacellulose hydroxypropyl methylwaxay la mid tahay kuwa kaleether-yada cellulose, oo inta badan loo isticmaalo kala firdhiye, wakiil joojin, dhumuc-saare, emulsifier, xasiliye, iyo dhejis meelo kala duwan. Waxay ka sarraysaa ether-yada kale ee cellulose marka loo eego milmida, kala firdhinta, hufnaanta, iyo iska caabbinta ensaymka.

Warshadaha cuntada iyo dawooyinka, waxaa loo isticmaalaa wax lagu daro. Sababtoo ah sifooyinka dhejiska, sifooyinka sameynta filimada, dhumucda iyo kala firdhinta dareeraha, iyo sidoo kale awooddeeda ay uga hortagto gelitaanka saliidda iyo ilaalinta qoyaanka, waxaa loo isticmaalaa dhejis, dhumuc, kala firdhiye, gargaare, xasiliye, iyo emulsifier. Ma laha sun, qiimo nafaqo, iyo isbeddello dheef-shiid kiimikaad.

Intaa waxaa dheer,HPMCwaxay leedahay codsiyo ku saabsan falcelinta polymerization resin synthetic, petrochemicals, dhoobada, sameynta waraaqaha, maqaar, qurxinta, dahaarka, qalabka dhismaha, iyo saxamada daabacaadda ee xasaasiga ah.