Feem ntau hais lus, viscosity ntawm hydroxypropyl methylcellulose yog siab dua. Txawm li cas los xij, nws kuj nyob ntawm qhov kev hloov pauv thiab qhov nruab nrab ntawm qhov kev hloov pauv. Hydroxypropyl methyl cellulose belongs rau non-ionic cellulose ether, cov tsos yog dawb hmoov, tsw thiab saj, soluble nyob rau hauv dej thiab feem ntau polar organic solvents thiab kom zoo feem ntawm ethanol / dej, propanol / dej, dichloroethylene Nws yog insoluble nyob rau hauv alkanes, acetone, thiab kiag li ethanol, thiab swells mus rau hauv ib tug ntshiab los yog me ntsis turbid colloidal tov nyob rau hauv dej txias. Cov tshuaj aqueous muaj cov dej num saum npoo av, tsim cov zaj duab xis nyias tom qab ziab, ua kom rov qab hloov pauv ntawm sol mus rau gel nyob rau hauv ib ntus thaum cua sov thiab txias. High transparency thiab ruaj khov ua haujlwm.
Hydroxypropyl methylcellulose muaj cov khoom ntawm thermal gelation. Tom qab cov tshuaj aqueous ntawm cov khoom yog rhuab, nws tsim ib gel thiab precipitates, thiab dissolves tom qab txias. Lub gelation kub ntawm txawv specifications txawv. Solubility sib txawv nrog viscosity. Qhov qis dua qhov viscosity, qhov ntau dua qhov solubility. Cov khoom ntawm hydroxypropyl methylcellulose nrog cov kev qhia tshwj xeeb sib txawv. Kev tawg ntawm hydroxypropyl methylcellulose hauv dej tsis cuam tshuam los ntawm tus nqi pH.
Nta: Nws muaj cov yam ntxwv ntawm thickening peev xwm, ntsev tawm, PH stability, dej tuav, seem stability, zoo heev zaj duab xis-tsim khoom, ntau yam enzyme kuj, dispersibility thiab cohesiveness.
Kev tuav dej ntawm cov khoom siv hydroxypropyl methylcellulose feem ntau cuam tshuam los ntawm cov hauv qab no:
1. Uniformity ntawm hydroxypropyl methylcellulose
Uniformly reacted hydroxypropyl methylcellulose, methoxyl thiab hydroxypropoxyl yog sib npaug, thiab cov dej tuav tus nqi siab.
2. Hydroxypropyl methylcellulose thermal gel kub
Qhov siab dua cov thermal gel, qhov siab dua cov dej tuav tus nqi; txwv tsis pub, qhov qis dua cov dej tuav tus nqi.
3. Viscosity ntawm hydroxypropyl methylcellulose
Thaum cov viscosity ntawm hydroxypropyl methylcellulose nce, cov dej tuav tus nqi kuj nce; Thaum lub viscosity nce mus txog ib theem, qhov nce hauv dej tuav tus nqi yuav maj mam.
4. Tus nqi ntawm hydroxypropyl methylcellulose ntxiv
Qhov ntau dua ntawm hydroxypropyl methylcellulose ntxiv, qhov siab dua cov dej tuav thiab cov dej tuav tau zoo dua. Nyob rau hauv qhov ntau ntawm 0.25-0.6% ntxiv, cov dej tuav tus nqi nce sai nrog qhov nce ntawm qhov sib ntxiv; thaum cov nyiaj ntxiv ntxiv, qhov kev nce ntawm cov dej tuav tus nqi qeeb.
Post lub sij hawm: Mar-14-2023