Cov qauv tshuaj ntawm cellulose ether derivatives

Cellulose ethers yog derivatives ntawm cellulose, ib tug natural polysaccharide pom nyob rau hauv lub cell phab ntsa ntawm cov nroj tsuag. Cov qauv tshuaj ntawm cellulose ethers yog tus cwj pwm los ntawm kev qhia ntawm ntau pawg ether los ntawm kev hloov tshuaj lom neeg ntawm hydroxyl (-OH) pawg uas muaj nyob hauv cellulose molecule. Feem ntau hom cellulose ethers muaj xws li:

1. Hydroxypropyl Methylcellulose (HPMC):
   • Qauv:
     • HPMC yog tsim los ntawm kev hloov cov pawg hydroxyl ntawm cellulose nrog ob pawg hydroxypropyl (-OCH2CHOHCH3) thiab methyl (-OCH3) pawg.
     • Qhov degree ntawm kev hloov pauv (DS) qhia qhov nruab nrab ntawm cov neeg hloov pauv hydroxyl pawg ib chav tsev piam thaj hauv cov saw cellulose.
2. Carboxymethyl Cellulose(CMC):
   • Qauv:
     • CMC yog tsim los ntawm kev qhia carboxymethyl (-CH2COOH) pawg rau hydroxyl pawg ntawm cellulose.
     • Cov pawg carboxymethyl muab cov dej solubility thiab anionic cim rau cov saw cellulose.
3. Hydroxyethyl Cellulose (HEC):
   • Qauv:
     • HEC yog muab los ntawm kev hloov cov pawg hydroxyl ntawm cellulose nrog hydroxyethyl (-OCH2CH2OH) pawg.
     • Nws nthuav tawm txhim kho dej solubility thiab thickening zog.
4. Methyl Cellulose (MC):
   • Qauv:
     • MC yog tsim los ntawm kev qhia methyl (-OCH3) pawg rau hydroxyl pawg ntawm cellulose.
     • Nws yog feem ntau siv rau nws cov dej khaws cia thiab cov yeeb yaj kiab tsim cov khoom.
5. Ethyl Cellulose (EC):
   • Qauv:
     • EC yog tsim los ntawm kev hloov cov pawg hydroxyl ntawm cellulose nrog ethyl (-OC2H5) pawg.
     • Nws yog lub npe hu rau nws insolubility nyob rau hauv dej thiab feem ntau yog siv nyob rau hauv zus tau tej cov coatings thiab films.
6. Hydroxypropyl Cellulose (HPC):
   • Qauv:
     • HPC yog muab los ntawm kev qhia hydroxypropyl (-OCH2CHOHCH3) pawg rau hydroxyl pawg ntawm cellulose.
     • Nws yog siv raws li ib tug binder, zaj duab xis qub, thiab viscosity modifier.

Cov qauv tshwj xeeb sib txawv rau txhua qhov cellulose ether derivative raws li hom thiab qib kev hloov pauv tau qhia thaum lub sijhawm hloov kho tshuaj. Kev taw qhia ntawm cov pab pawg ether no qhia cov khoom tshwj xeeb rau txhua tus cellulose ether, ua rau lawv tsim nyog rau ntau yam kev lag luam.