Microcrystalline cellulose/CAS: 9004-34-6
Kev Piav Qhia Luv:
Lub npe khoom: Microcrystalline cellulose
CAS: 9004-34-6
MF: (C12H20O10)n
MW: 324.28
QAUV:
Qhov Ceev: 1.5 g/cm3 (20 ℃)
Qhov kub hnyiab: 164 ° C
cov lus qhia tshwj xeeb
| Khoom | Skev piav qhia meej |
| Qhov tsos | Dawb rau cov hmoov dawb dawb |
| Cov ntsiab lus ntawm cellulose% | 97-102 |
| PH | 5.0-7.5 |
| Cov ntsiab lus ntawm tshauv | ≤0.3% |
| Poob thaum ziab | ≤10% |
| Cov tshuaj yaj hauv dej | ≤0.2% |
Kev Siv
Cov khoom siv lim dej: Tus neeg sawv cev tiv thaiv kev sib sau ua ke, tus neeg khi; Tus neeg sawv cev ua kom loj; Tus neeg tawg ua pawg; Tus neeg tawg ua pawg; Tus neeg txhim kho cov qauv; Tus neeg sawv cev ua kom tuab; Tus neeg sawv cev kho dej. Nws tau teev los ntawm EEC rau kev ntxuav npias. Raws li tau teev tseg hauv GB 2760-96, nws suav tias yog ib qho khoom siv pab ua tiav. Raws li cov cai EEC-HACSG, nws yuav tsum tsis txhob siv rau hauv cov khoom noj menyuam yaus. Ua tus neeg sawv cev tiv thaiv kev sib sau ua ke, hauv Suav teb, nws raug tso cai siv rau hauv cov hmoov tsw qab nrog kev siv ntau tshaj plaws ntawm 50g / kg; nws kuj tseem siv tau rau hauv ice cream nrog kev siv ntau tshaj plaws ntawm 40g / kg; nws kuj tseem siv tau rau hauv cov hmoov qab zib thiab cov roj zaub nrog kev siv ntau tshaj plaws ntawm 20.0g / kg. Thaum cov pab pawg hydroxyl hauv cov cellulose macromolecule dhau los ntawm esterification lossis etherification reactions, ntau yam khoom muaj txiaj ntsig tuaj yeem tau txais. Cov cellulose esters uas tau siv tiag tiag suav nrog: cellulose nitrate, cellulose acetate, cellulose acetate butyrate thiab cellulose xanthate. Cellulose ethers suav nrog: methyl cellulose, carboxymethyl cellulose, ethyl cellulose, hydroxyethyl cellulose, cyanoethyl cellulose, hydroxypropyl cellulose thiab hydroxypropyl methyl cellulose, thiab lwm yam. Tsis tas li ntawd, muaj cov ester-ether derivatives sib xyaw. Microcrystalline cellulose tuaj yeem siv rau kev lag luam xws li textiles, khaub ncaws, brewing, zaub mov, thiab papermaking.
Feem ntau, cov microcrystalline cellulose muaj qhov ceev qis dua rau cov khoom khov-qhuav thiab qhov ceev siab dua rau cov khoom tsuag-qhuav. Cov dej noo yog li 5%. Microcrystalline cellulose yog dispersible tab sis insoluble hauv dej, insoluble hauv dilute acids, organic solvents thiab roj, o thiab yaj ib nrab hauv dilute alkaline kua. Dispersing microcrystalline cellulose hmoov hauv dej yuav ua rau cov gel dawb pob tshab lossis nplaum. Tsuas yog cov dilute heev, nws tseem ruaj khov rau ntau xyoo.
Ntim thiab Xa Khoom
raws li cov neeg siv khoom xav tau.
Yog cov khoom siv dav dav thiab tuaj yeem xa los ntawm dej hiav txwv thiab huab cua
Khaws cia thiab khaws cia
Lub neej txee: 24 lub hlis txij li hnub tsim khoom hauv cov ntim khoom tsis tau qhib khaws cia rau hauv qhov chaw txias thiab qhuav kom tsis txhob raug tshav ntuj ncaj qha, dej.
Lub tsev rau khoom muaj cua nkag, ziab kom qhuav kub tsawg, Sib cais ntawm cov tshuaj oxidants, cov kua qaub.
