Hydroxypropyl methylcellulose (HPMC) cov yam ntxwv

Cov khoom sib xyaw ua ke ntau lub cev thiab tshuaj lom neeg los ua ib yam khoom tshwj xeeb nrog ntau yam kev siv, thiab ntau yam khoom muaj raws li hauv qab no:

(1) Kev tuav dej: Nws tuaj yeem tuav dej ntawm qhov ntxeem tau xws li phab ntsa cement boards thiab cib.

(2) Kev tsim zaj duab xis: Nws tuaj yeem tsim cov pob tshab, tawv thiab mos zaj duab xis nrog cov roj zoo heev.

(3) Organic solubility: Cov khoom yog soluble nyob rau hauv ib co organic solvents, xws li ethanol / dej, propanol / dej, dichloroethane, thiab ib tug hnyav system muaj li ntawm ob organic solvents.

(4) Thermal gelation: Thaum lub aqueous tov ntawm cov khoom yog rhuab, nws yuav tsim ib tug gel, thiab cov tsim gel yuav los ua ib tug tov dua tom qab txias.

(5) Kev ua haujlwm saum npoo: Muab kev ua haujlwm saum npoo av hauv kev daws kom ua tiav qhov xav tau emulsification thiab kev tiv thaiv colloid, nrog rau theem stabilization.

(6) Kev ncua: Nws tuaj yeem tiv thaiv nag lossis daus ntawm cov khoom siv, yog li inhibiting qhov tsim ntawm sediment.

(7) Kev tiv thaiv colloid: nws tuaj yeem tiv thaiv cov tee dej thiab cov khoom los ntawm coalescing lossis coagulating.

(8) Adhesiveness: Siv los ua cov nplaum rau cov xim, cov khoom siv luam yeeb, thiab cov khoom siv ntawv, nws muaj kev ua tau zoo heev.

(9) Dej solubility: Cov khoom tuaj yeem yaj hauv dej hauv ntau qhov sib txawv, thiab nws qhov siab tshaj plaws tsuas yog txwv los ntawm viscosity.

(10) Non-ionic inertness: Cov khoom yog non-ionic cellulose ether, uas tsis ua ke nrog hlau ntsev los yog lwm yam ions los ua insoluble precipitates.

(11) Acid-base stability: haum rau siv nyob rau hauv thaj tsam ntawm PH3.0-11.0.

(12) Tasteless thiab tsw, tsis cuam tshuam los ntawm metabolism; siv los ua zaub mov thiab tshuaj ntxiv, lawv yuav tsis raug metabolized hauv cov zaub mov thiab yuav tsis muab calories.