Lub peev xwm khaws dej ntawm hydroxypropyl methylcellulose nyob ntawm cov ntsiab lus hydroxypropyl. Nyob rau hauv tib lub xeev, lub peev xwm khaws dej ntawm hydroxypropyl methylcellulose siab yog muaj zog dua, thiab cov ntsiab lus methoxy ntawm tib cov ntsiab lus hydroxypropyl raug txo kom tsim nyog. . Cov ntsiab lus siab dua ntawm hydroxypropyl methylcellulose, qhov ntau dua nws cov viscosity, yog li thaum xaiv cov khoom, koj yuav tsum xaiv cov khoom uas haum rau koj raws li lub hom phiaj ntawm cov khoom.
Kub thiab lwm yam tseem ceeb muaj feem cuam tshuam rau kev khaws dej ntawm hydroxypropyl methylcellulose.
Kub ntawm cov gel thermal:
Cellulose ether HPMC muaj qhov kub thiab txias thermal gelation siab thiab khaws dej zoo; ntawm qhov tsis sib xws, nws muaj kev khaws dej tsis zoo.
Viscosity ntawm cellulose ether HPMC:
Thaum qhov viscosity ntawm HPMC nce ntxiv, nws cov dej khaws cia kuj nce ntxiv; thaum qhov viscosity nce mus rau qee qhov, qhov nce ntawm kev khaws cia dej txo qis.
Cellulose ether HPMC homogeneous:
HPMC muaj cov tshuaj tiv thaiv zoo ib yam, kev faib tawm ntawm methoxyl thiab hydroxypropoxyl sib npaug, thiab muaj kev khaws cia dej zoo.
Cellulose ether HPMC koob tshuaj:
Qhov ntau npaum li cas, qhov siab dua ntawm qhov khaws cia dej thiab qhov pom tseeb dua qhov cuam tshuam ntawm cov dej.
Thaum tus nqi ntxiv yog 0.25 ~ 0.6%, tus nqi khaws dej nce sai nrog rau qhov nce ntawm tus nqi ntxiv; thaum tus nqi ntxiv nce ntxiv, tus qauv nce ntawm tus nqi khaws dej qeeb qeeb.
Hauv ntej, qhov kev khaws dej ntawm HPMC muaj feem cuam tshuam nrog cov yam xws li kub thiab viscosity, thiab nws qhov kev khaws dej muaj feem cuam tshuam nrog qhov ntau ntawm hydroxypropyl methylcellulose ntxiv. Thaum qhov ntau ntawm hydroxypropyl methylcellulose mus txog qee qhov nqi, nws qhov kev ua tau zoo ntawm kev khaws dej mus txog qhov sib npaug.
Lub sijhawm tshaj tawm: Lub Ob Hlis-23-2023