Focus on Cellulose ethers

Hydroxymethylcellulose miyuu la mid yahay hydroxypropyl methylcellulose?

Carboxymethyl cellulose (Carboxymethyl cellulose) waxaa sameeyay falcelinta kooxda hydroxyl ee unugga anhydroglucose ee silsiladda cellulose oo leh kooxda etherification (chloro Z acid ama ethylene oxide);

Waa walax amorphous ah oo aan midab lahayn oo ku milma biyaha, xalalka alkali ee aqueous, ammonia iyo xal cellulose, oo aan lagu milmin xal organic iyo saliidda macdanta; waxaa loo isticmaali karaa sida cabbirka, calending iyo wakiilka dhumucda warshadaha dharka;

Wakiilka qaabeynta ee wax soo saarka waraaqaha iyo guddiga;

Dib-u-noolaynta wasakhda ee walxaha nadiifinta synthetic;

Wakiilka sabbeynta ee xulashada copper-nickel iyo potassium;

Dhumucdiisuna waxay joogsanaysaa Viscous iyo xasiliye marka la qodayo ceelasha saliidda iyo gaaska;

Halabuurka xabagta ee wallpaper;

qaybaha isku dhafka dhismaha qalalan;

Qaybaha rinjiga cinjirka biyaha, iwm.

Hydroxypropyl methylcellulose (Hypromellose, Cellulose) waxay ka samaysan tahay cellulose suuf ah oo aad u saafi ah oo ah walxo ceeriin ah, taas oo si gaar ah loogu darey xaaladaha alkaline, oo aan ku jirin wax maaddooyin firfircoon sida xubnaha xayawaanka iyo saliidaha. Ku milmay biyaha iyo inta badan iyo saamiga ku habboon ee ethanol / biyaha, propanol / biyaha, dichloroethane, iwm, oo aan milmin ether, acetone, iyo ethanol dhammaystiran, oo barara xal kolloidal ah oo cad ama waxoogaa turbid ah oo biyo qabow ah. Xalka aqueous wuxuu leeyahay dhaqdhaqaaqa dusha sare, daahfurnaanta sare iyo waxqabadka xasilloon.

HPMC waxay leedahay hantida gelation kulaylka. Xalka aqueous sheyga ayaa la kululeeyaa si uu u sameeyo jel oo soo da'o, ka dibna mila marka la qaboojiyo ka dib. Heerkulka gelation ee tilmaamo kala duwan ayaa ka duwan. Solubility wuxuu ku kala duwan yahay viscosity. Maqnaanshaha hoose, ayaa sii weynaan kara milanka. Tilmaamaha kala duwan ee HPMC waxay leeyihiin kala duwanaansho gaar ah oo ku saabsan hantidooda. Kala dirida HPMC ee biyaha ma saamayso qiimaha pH.


Waqtiga boostada: Abriil-24-2023
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