Hydroxypropyl methyl cellulose iyo carboxymethyl cellulose sodium waa la isku dari karaa

Ma isku dari karaan HPMC iyo CMC

Methyl cellulose waa caddaan ama caddaan sida budada suufka ah ama granular;Aan ur lahayn, dhadhamin.Alaabtan biyaha ku bararaysa xal kolloidal cad ama wax yar turbid;Aan ku milmin ethanol dhammaystiran, chloroform ama diethyl ether.Si degdeg ah ayaa loo kala firdhiyaa oo loogu bararaa biyo kulul 80-90 ℃, oo si degdeg ah ayaa loo milmaa kadib qaboojinta.Xalka aqueous waa mid aad u deggan heerkulka qolka, oo wuxuu geli karaa heerkulka sare, iyo jelku wuxuu bedeli karaa xalka heerkulka.

Waxay leedahay qoyaan aad u fiican, kala firidhsan, adhesion, dhumucdiisuna, emulsification, haynta biyaha iyo samaynta filimada, iyo sidoo kale impermeability saliid.Filimku wuxuu leeyahay adkeysi aad u wanaagsan, dabacsanaan iyo daahfurnaan.Sababtoo ah waa non-ionic, waxay noqon kartaa mid la jaan qaada emulsifiers kale, laakiin way fududahay in la milix, xalkuna wuu xasiloon yahay inta u dhaxaysa PH2 - 12. Sodium carboxymethyl cellulose Alaabta Tani waa cusbada sodium ee ether cellulose carboxymethyl, waxaa iska leh anionic cellulose ether, waa cad ama budo fibros ah oo cad ama caano leh, cufnaanta 0.5-0.7 g/cubic sentimitir, ku dhawaad ​​ur, aan dhadhamin, hygroscopic.Way fududahay in lagu kala firdhiyo biyaha galay xal jelatin ah oo hufan, oo aan milmin ethanol iyo dareerayaasha kale ee organic.

Marka pH ee xalka aqueous waa 6.5 - 8.5, viscosity ee slurry si weyn hoos u marka pH waa> 10 ama <5, iyo waxqabadka waa ugu fiican marka pH ah waa 7. Waayo, xasiloonida kulaylka, viscosity si degdeg ah kor u kaco hoos. 20℃, si tartiib tartiib ah ayey isu beddeshaa at 45℃, iyo denaturation kolloid iyo viscosity iyo guryaha si weyn hoos u marka la kululeeyo muddo dheer ka sarreeya 80 ℃.Si fudud ugu milmay biyaha, xal hufan;Aad bay u deggan tahay xalalka alkaline-ka, wayna fududahay in la hydrolyze marka ay dhacdo acid.Marka qiimaha pH uu yahay 2-3, roobab ayaa dhici doona, roobabkuna waxay sidoo kale dhici doonaan kiiska cusbada biraha badan leh.Hydroxypropyl methyl cellulose, oo sidoo kale loo yaqaan hydroxypropyl methyl cellulose, cellulose hydroxypropyl methyl ether, waa xulashada cellulose suuf aadka u saafiga ah sida alaabta ceeriin, hoos xaaladaha alkaline by etherification gaar ah iyo diyaarinta.

Ku milmay biyaha iyo inta badan C iyo qaybta ku habboon ee ethanol / biyaha, propanol / biyaha, dichloroethane, iwm., aan milmin ee diethyl ether, acetone, ethanol dhammaystiran, barar biyo qabow galay xal kolloidal cad ama wax yar turbidized.Xalka aqueous wuxuu leeyahay dhaqdhaqaaqa dusha sare, daahfurnaanta sare iyo waxqabadka xasilloon.HPMC waxay leedahay hantida jel kulul.Kuleylka ka dib, xalalka aqueous-ka badeecada wuxuu sameeyaa roobka jel, ka dibna wuu milmaa ka dib qaboojinta.Heerkulka jel ee tilmaamo kala duwan ayaa ka duwan.