HPMC tuaj yeem yaj rau hauv cov kuab tshuaj sib xyaw nrog dej txias thiab cov organic kom ua tau cov kua nplaum pob tshab. Cov kua dej muaj kev ua haujlwm ntawm qhov chaw, pob tshab siab thiab ruaj khov. Nws cov kev yaj hauv dej tsis cuam tshuam los ntawm pH. Nws muaj cov teebmeem thickening thiab anti freezing hauv tshuaj zawv plaub hau thiab da dej gel, thiab muaj cov dej khaws cia thiab cov khoom zoo rau cov plaub hau thiab daim tawv nqaij. Nrog rau kev nce ntxiv ntawm cov khoom siv raw, cellulose (antifreeze thickener) tuaj yeem txo tus nqi thiab ua tiav cov txiaj ntsig zoo tshaj plaws thaum siv rau hauv tshuaj zawv plaub hau thiab da dej gel.
Cov tshuaj lom neeg txhua hnub dej txias tam sim ntawd hydroxypropyl methyl cellulose muaj cov yam ntxwv ntawm cov khoom hauv qab no:
1. Kev ua tau zoo heev ntawm kev khaws dej. HPMC muaj cov yam ntxwv hydrophilic. Nws tuaj yeem khaws dej kom zoo hauv cov khoom nplaum, nplaum thiab cov khoom nplaum.
2. Dej txias tam sim ntawd hydroxypropyl methylcellulose HPMC siv cov khoom siv raw ntuj, uas muaj kev ua tau zoo me me, tsis khaus, tiv thaiv ib puag ncig thiab kev nyab xeeb.
3. PH ruaj khov heev, thiab qhov viscosity ntawm cov kua dej feem ntau ruaj khov hauv qhov ntau ntawm pH3.0 txog 11.0.
4. Cov kua dej ntawm cov khoom muaj kev ua haujlwm ntawm qhov chaw, emulsification, kev tiv thaiv colloid thiab kev ruaj khov. Nws qhov kev nruj ntawm qhov chaw yog li 2% thiab cov kua dej yog 42-56dyn / cm2.
5. Thickening thiab dej solubility, nws tuaj yeem yaj sai sai hauv dej txias, qee cov organic solvents thiab cov khoom sib xyaw nrog cov organic solvents.
6. Ua kom viscosity ntau ntxiv: thaum muaj me ntsis ntawm kev yaj, yuav tsim cov kua viscous pob tshab, uas muaj cov yam ntxwv ntawm kev ua haujlwm ruaj khov thiab pob tshab siab. Qhov solubility yuav hloov pauv nrog viscosity. Qhov viscosity qis dua, qhov ntau dua ntawm kev yaj, uas tuaj yeem txhim kho qhov ruaj khov ntawm lub kaw lus.
7. Kev tiv taus ntsev zoo heev. HPMC yog cov polymer uas tsis yog ionic, uas ruaj khov heev hauv cov kua dej organic electrolyte lossis cov organic electrolyte.
8. Kev ua kom sov: thaum cov kua dej raug cua sov rau qee qhov kub, nws yuav dhau los ua opaque kom txog thaum lub xeev flocculation tsim, uas yuav ua rau cov kua poob nws cov viscosity. Txawm li cas los xij, nws yuav hloov mus rau lub xeev kua qub tom qab txias. Rau qhov teeb meem ntawm thermal gel, qhov kub feem ntau nyob ntawm hom khoom, kev sib xyaw ntawm cov kua thiab qhov kub thiab txias.
9. HPMC muaj lwm yam khoom hauv kev siv tshuaj txhua hnub, xws li cov khoom ua yeeb yaj kiab zoo heev, kev tiv thaiv enzyme ntau, kev sib kis thiab kev sib txuas.
Lub sijhawm tshaj tawm: Lub Xya Hli-29-2022