Hydroxypropyl methylcellulose (INN name: Hypromellulose), oo sidoo kale loo soo gaabiyo sida hydroxypropyl methylcellulose (HPMC), waa noocyo kala duwan oo ah unugyo isku qasan oo aan ionic cellulose ahayn.

Hydroxypropyl methylcellulose(INN magaca:Hypromellulose), sidoo kale loo soo gaabiyohydroxypropyl methylcellulose (HPMC), waa noocyo kala duwan oo aan ionic cellulose ahayn ethers isku qasan. Waa semi synthetic, aan firfircoonayn, polymer viscoelastic oo caadi ahaan loo isticmaalo saliidaha indhaha, ama isku-xidhka ama ka-qaadista daawada afka, oo caadi ahaan laga helo noocyo kala duwan oo badeecado ah.

Sida cunto lagu daro, hydroxypropyl methylcellulose waxay ciyaari kartaa doorarka soo socda: emulsifier, dhumuc weyn, wakiilka ganaax, iyo beddelka jelatin xayawaanka. Codex Alimentarius code waa E464.

hantida kiimikada

Alaabta dhammaatay eehydroxypropyl methyl cellulosewaa budo cad ama fibrosoceed dabacsan oo cad, oo cabbirkeedu dhex marayo 80 shaandho mesh ah. Saamiyada kala duwan ee methoxy iyo hydroxypropyl content iyo viscosity ee alaabta la dhammeeyay waxay ka dhigtaa noocyo kala duwan oo kala duwan oo waxqabadka ah. Waxay leedahay sifooyin lagu milmo biyaha qabow oo aan lagu milmin biyaha kulul oo la mid ah methylcellulose, iyo ku milmaynteeda dareerayaasha organic waxay ka badan tahay biyaha. Waxay ku milmi kartaa methanol anhydrous ah iyo ethanol, iyo sidoo kale koloriin ku jirta hydrocarbons sida dichloromethane, trichloroethane, iyo dareerayaasha organic sida acetone, isopropanol, iyo khamriga diacetone. Marka lagu milmo biyaha, waxay ku daraa molecules biyaha si ay u sameeyaan kolloid. Waxay u degan tahay asiidhyada iyo saldhigyada mana saamayso inta u dhaxaysa pH 2-12. Inkasta oo hydroxypropyl methylcellulose aanu ahayn mid sun ah, waa mid gubanaysa waxayna si xun uga falcelin kartaa oksaydhiyeyaasha [5].

viscosity eealaabta HPMCwaxay kordhisaa korodhka feejignaanta iyo miisaanka kelliyada. Marka heerkulku kordho, viscosity wuxuu bilaabaa inuu hoos u dhaco. Marka heerkulku gaaro heerkul gaar ah, viscosity ayaa si lama filaan ah u kacaya oo jel ayaa dhacaya. Heerkulka jel ee alaabooyinka viscosity-ka hooseeya ayaa ka sarreeya kan alaabooyinka viscosity-ga sarreeya. Xalkeeda aqueous waa mid degan heerkulka qolka guud ahaanna ma laha hoos u dhac ku yimaadda viscosity marka laga reebo xaalufka enzymatic. Waxay leedahay guryaha gelling kulaylka gaar ah, film samaynta wanaagsan waxqabadka iyo dhaqdhaqaaqa dusha.

Diyaarinta

Ka dib markii cellulose lagu daaweeyo alkali, alkoxy anion ay dhaliso hydroxyl deprotonation waxaa lagu dari karaa epoxy propane si loo dhaliyo.hydroxypropyl cellulose ether; Waxa kale oo ay ku ururin kartaa methyl chloride si ay u soo saarto ether methyl cellulose. Marka labada falcelin isku mar dhacaan,hydroxypropyl methyl cellulosewaa la soo saaraa.

ujeedo

Isticmaalkahydroxypropyl methyl cellulosewaxay la mid tahay kuwa kaleethers cellulose, inta badan loo isticmaalo sida kala firdhiso, wakiilka ganaaxa, dhumuclaha, emulsifier, xasiliye, iyo koollo dhinacyo kala duwan ah. Way ka sarraysaa ether-yada kale ee cellulose marka la eego milanka, kala firdhinta, hufnaanta, iyo iska caabbinta enzyme.

Warshadaha cuntada iyo dawooyinka, waxa loo isticmaalaa wax lagu daro. Iyada oo ay ugu wacan tahay sifooyinkeeda dhejiska, sifooyinka filim samaynta, dhumucda iyo kala firdhinta dareeraha, iyo sidoo kale awoodda ay u leedahay in ay ka hortagto gelitaanka saliidda iyo ilaalinta qoyaanka, waxaa loo isticmaalaa sida koollada, dhumucyada, kala-baxa, qaboojiyaha, xasilinta, iyo emulsifier. Ma laha wax sun ah, ma laha qiimo nafaqo, iyo isbeddel dheef-shiid kiimikaad ah.

Intaa waxaa dheer,HPMCWaxay leedahay codsiyo falcelinta resin polymerization synthetic, kiimikooyinka petrochemicals, ceramics, waraaqaha samaynta, haragga, waxyaalaha la isku qurxiyo, dahaarka, qalabka dhismaha, iyo taarikada daabacaadda sawir-qaadista.