Muaj ntau hom cellulose, thiab qhov sib txawv ntawm lawv siv yog dab tsi?

Cellulose yog ib qho polymer ntuj uas muaj ntau yam thiab pom muaj nyob rau hauv cov phab ntsa ntawm cov nroj tsuag, muab kev txhawb nqa thiab kev ruaj khov. Nws yog tsim los ntawm cov glucose units txuas ua ke los ntawm β-1,4-glycosidic bonds. Txawm hais tias cellulose nws tus kheej yog ib qho tshuaj homogeneous, txoj kev uas nws tau teeb tsa thiab ua tiav ua rau muaj ntau hom nrog cov khoom sib txawv thiab kev siv.

1. Microcrystalline Cellulose (MCC):

MCCyog tsim los ntawm kev kho cov cellulose fibers nrog cov mineral acids, ua rau cov khoom me me, crystalline.
Siv: Nws yog siv dav ua tus neeg sawv cev bulking, binder, thiab disintegrant hauv cov tshuaj xws li cov ntsiav tshuaj thiab capsules. Vim nws qhov xwm txheej inert thiab zoo heev compressibility, MCC ua kom muaj kev faib tshuaj sib npaug thiab pab txhawb kev tso tawm tshuaj.

2. Cellulose Acetate:

Cellulose acetate yog tau los ntawm acetylating cellulose nrog acetic anhydride lossis acetic acid.
Siv: Hom cellulose no feem ntau siv rau hauv kev tsim cov fibers rau textiles, suav nrog khaub ncaws thiab upholstery. Nws kuj tseem siv rau hauv kev tsim cov lim luam yeeb, zaj duab xis thaij duab, thiab ntau hom membranes vim nws qhov xwm txheej semi-permeable.

3.Ethylcellulose:

Ethylcellulose yog muab los ntawm cellulose los ntawm kev cuam tshuam nrog ethyl chloride lossis ethylene oxide.
Siv: Nws cov yam ntxwv zoo heev rau kev tsim cov zaj duab xis thiab kev tiv taus cov kuab tshuaj organic ua rau ethylcellulose tsim nyog rau kev txheej cov ntsiav tshuaj tshuaj, muab kev tswj hwm kev tso tawm ntawm cov tshuaj. Tsis tas li ntawd, nws siv rau hauv kev tsim cov kua mem, cov nplaum, thiab cov txheej tshwj xeeb.

4. Hydroxypropyl Methylcellulose (HPMC):

HPMCyog synthesized los ntawm kev hloov cov hydroxyl pawg ntawm cellulose nrog methyl thiab hydroxypropyl pawg.
Siv: HPMC ua haujlwm ua cov khoom ua kom tuab, ruaj khov, thiab emulsifier hauv ntau yam lag luam, suav nrog zaub mov, tshuaj pleev ib ce, thiab tshuaj. Nws feem ntau pom muaj nyob rau hauv cov khoom siv tu tus kheej xws li tshuaj pleev, tshuaj pleev, thiab tshuaj pleev, nrog rau hauv cov ntawv thov zaub mov xws li cov kua ntses, cov khaub ncaws hnav, thiab ice cream.

5. Sodium Carboxymethyl Cellulose (CMC):

CMC yog tsim los ntawm kev kho cellulose nrog chloroacetic acid thiab alkali.
Siv: Vim nws cov dej solubility siab thiab cov khoom tuab,CMCsiv dav ua tus stabilizer thiab viscosity modifier hauv cov khoom noj, tshuaj, thiab kev siv hauv kev lag luam. Nws feem ntau pom muaj nyob rau hauv cov khoom ci, cov khoom noj mis nyuj, cov tshuaj txhuam hniav, thiab cov tshuaj ntxuav tes.

6. Nitrocellulose:

Nitrocellulose yog tsim los ntawm nitrating cellulose nrog kev sib xyaw ntawm nitric acid thiab sulfuric acid.
Siv: Nws feem ntau yog siv rau hauv kev tsim cov khoom tawg, lacquers, thiab celluloid plastics. Cov lacquers uas muaj nitrocellulose yog nrov rau kev ua tiav ntoo thiab cov txheej txheem tsheb vim lawv qhuav sai thiab ci ntsa iab.

7. Cov kab mob Cellulose:

Cov kab mob cellulose yog synthesized los ntawm qee hom kab mob los ntawm kev fermentation.
Siv: Nws cov khoom tshwj xeeb, suav nrog kev ntshiab siab, lub zog tensile, thiab biocompatibility, ua rau cov kab mob cellulose muaj txiaj ntsig zoo hauv kev siv biomedical xws li kev hnav khaub ncaws qhov txhab, cov ntaub so ntswg engineering, thiab cov kab ke xa tshuaj.

Cov cellulose sib txawv muaj ntau yam kev siv thoob plaws ntau yam lag luam, suav nrog tshuaj, ntaub, khoom noj, tshuaj pleev ib ce, thiab kev tsim khoom. Txhua hom muaj cov yam ntxwv tshwj xeeb uas ua rau nws haum rau kev siv tshwj xeeb, xws li kev muab kev txhawb nqa hauv cov ntsiav tshuaj tshuaj mus rau kev txhim kho cov qauv ntawm cov khoom noj lossis ua haujlwm ua lwm txoj hauv kev ruaj khov hauv biotechnology. Kev nkag siab txog qhov sib txawv no ua rau muaj kev xaiv cov hom cellulose kom ua tau raws li cov kev xav tau kev ua tau zoo tshwj xeeb hauv ntau daim ntawv thov.