Dab tsi yog qhov zoo ntawm cellulose?

Cellulose yog ib hom cellulose uas nws cov khoom siv thiab kev siv yuav nce sai heev. Nws yog non-inorganic cellulose tov ether ua los ntawm refined paj rwb tom qab deashing, siv propylene oxide thiab methyl chloride ua etherification agents, thiab los ntawm ib tug series ntawm cov tshuaj tiv thaiv. Qhov kev hloov pauv feem ntau yog 1.2 ~ 2.0. Nws cov yam ntxwv txawv vim qhov sib txawv ntawm tert-butyl Cheebtsam thiab hydroxypropyl Cheebtsam.

(1) Cellulose yog soluble hauv dej txias, thiab nws yuav nyuaj rau yaj hauv dej npau npau. Tab sis nws cov gelatinization kub nyob rau hauv boiling dej yog ho siab tshaj carboxycellulose. Lub xeev dissolution nyob rau hauv dej txias kuj zoo heev zoo dua piv nrog carboxycellulose.

(2) Lub viscosity ntawm cellulose muaj feem xyuam rau qhov loj ntawm cov txheeb ze molecular loj, thiab qhov loj ntawm cov txheeb ze molecular loj, lub viscosity siab dua. Kub kuj tseem yuav cuam tshuam rau nws cov viscosity, kub nce, viscosity txo. Tab sis nws cov viscosity siab thiab kub siab tsis tshua muaj teeb meem ntau dua li carboxycellulose. Nws cov kua dej aqueous ruaj khov thaum khaws cia hauv chav sov.

(3) Cov dej tuav thiab solubility ntawm cellulose nyob rau hauv nws cov nyiaj ntxiv, viscosity, thiab lwm yam, thiab nws cov dej tuav tus nqi nyob rau hauv tib qhov sib ntxiv yog siab dua li carboxycellulose.

(4) Cellulose tiv taus cov kua qaub thiab alkali, thiab nws cov tshuaj yog ruaj khov nyob rau hauv thaj tsam ntawm pH = 2 ~ 12. Anhydrous aluminium chloride thiab txiv qaub slurry tsis muaj kev cuam tshuam zoo rau nws cov khoom, tab sis alkali tuaj yeem ua kom nws cov melting nqi thiab txhim kho nws cov viscosity. Cellulose txhim khu kev qha rau cov kua qaub ntsev, tab sis thaum lub concentration ntawm cov ntsev ntsev yog siab, lub viscosity ntawm cov tshuaj cellulose nyhav nce.

(5) Cellulose tuaj yeem siv nrog dej-soluble polymers los ua ib qho kev sib xws thiab cov kua dej muaj kuab heev. Xws li acrylic emulsion, tapioca starch ether, zaub kua nplaum, thiab lwm yam.

(6) Cellulose muaj zog enzyme tsis kam tshaj carboxycellulose, thiab nws cov kua aqueous yog tsawg dua yuav yaj los ntawm enzymes dua carboxycellulose.

(7) Lub adhesion ntawm cellulose rau cement mortar siv yog siab tshaj carboxycellulose.