Hydroxypropyl methyl cellulose VS methyl cellulose

1. Hydroxypropyl methyl celluloseyaj hauv dej txias, dej kub yaj yuav ntsib teeb meem. Tab sis nws qhov kub gelation hauv dej kub siab dua li ntawm methyl cellulose. Qhov solubility ntawm methyl cellulose hauv dej txias kuj tau zoo dua heev.

2. Qhov viscosity ntawm hydroxypropyl methyl cellulose muaj feem cuam tshuam nrog nws qhov hnyav molecular, thiab qhov hnyav molecular loj dua yog qhov viscosity siab dua. Kub kuj tseem yuav cuam tshuam rau nws qhov viscosity, kub nce, viscosity txo qis. Txawm li cas los xij, qhov viscosity ntawm qhov kub siab qis dua li ntawm methyl cellulose. Cov tshuaj ruaj khov thaum khaws cia ntawm chav tsev kub.

3. Hydroxypropyl methyl cellulose ruaj khov rau cov kua qaub thiab alkali, thiab nws cov kua dej ruaj khov heev hauv pH = 2 ~ 12. Caustic soda thiab dej txiv qaub tsis muaj feem cuam tshuam loj rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws cov nqi yaj sai dua thiab txhim kho qhov viscosity ntawm tus pin. Hydroxypropyl methyl cellulose ruaj khov rau cov ntsev dav dav, tab sis thaum qhov concentration ntawm cov ntsev ntau, qhov viscosity ntawm hydroxypropyl methyl cellulose kua feem ntau nce.

4. Qhov khaws dej ntawm hydroxypropyl methyl cellulose nyob ntawm nws cov nqi ntxiv, viscosity, thiab lwm yam. Qhov ceev khaws dej nyob rau hauv tib qho nqi ntxiv yog siab dua li ntawm methyl cellulose.

5. Qhov nplaum ntawm hydroxypropyl methyl cellulose rau kev tsim kho mortar siab dua li ntawm methyl cellulose.

6. Hydroxypropyl methyl cellulosemuaj kev tiv thaiv enzyme zoo dua li methyl cellulose, thiab qhov ua tau ntawm enzymatic degradation hauv cov kua qis dua li methyl cellulose.