Keeb kwm ntawm kev tsim khoom thiab kev tshawb fawb ntawm Cellulose Ethers

Cellulose ethers muaj keeb kwm ntev ntawm kev tsim khoom thiab kev tshawb fawb, yos rov qab mus rau lub xyoo pua puv 19.Thawj cellulose ether, ethyl cellulose, tau tsim nyob rau xyoo 1860 los ntawm British chemist Alexander Parkes.Nyob rau hauv thaum ntxov 1900s, lwm cellulose ether, methyl cellulose, yog tsim los ntawm German chemist Arthur Eichengrün.

Thaum lub xyoo pua 20th, kev tsim thiab kev tshawb fawb ntawm cellulose ethers tau nthuav dav heev.Hauv xyoo 1920, carboxymethyl cellulose (CMC) tau tsim los ua dej-soluble cellulose ether.Qhov no tau ua raws li kev txhim kho ntawm hydroxyethyl cellulose (HEC) hauv xyoo 1930, thiab hydroxypropyl methyl cellulose (HPMC) hauv xyoo 1950.Cov cellulose ethers tau dav siv niaj hnub no hauv ntau qhov kev lag luam, suav nrog zaub mov, tshuaj, tshuaj pleev ib ce, thiab kev tsim kho.

Hauv kev lag luam zaub mov, cellulose ethers yog siv los ua cov thickeners, emulsifiers, thiab stabilizers.Lawv feem ntau siv rau hauv cov khoom xws li cov khaub ncaws hnav khaub ncaws, ice cream, thiab cov khoom ci.Hauv kev lag luam kws tshuaj, cellulose ethers yog siv los ua binders, disintegrants, thiab coating agents hauv cov ntsiav tshuaj thiab tshuaj ntsiav.Hauv kev lag luam tshuaj pleev ib ce, lawv tau siv los ua cov tshuaj ua kom tuab thiab emulsifiers hauv cov tshuaj pleev thiab tshuaj pleev.Hauv kev tsim kho kev lag luam, cellulose ethers yog siv los ua cov dej tuav thiab ua haujlwm zoo hauv cov cement thiab mortar.

Kev tshawb fawb txog cellulose ethers txuas ntxiv mus rau hnub no, nrog rau kev tsom mus rau kev tsim kho tshiab thiab txhim kho cellulose ethers nrog kev txhim kho cov khoom thiab kev ua haujlwm.Kev nce qib hauv thev naus laus zis tau ua rau kev txhim kho cov txheej txheem tshiab los tsim cov cellulose ethers, xws li kev hloov kho enzymatic thiab kev hloov kho tshuaj siv cov kuab tshuaj ntsuab.Kev tshawb fawb tsis tu ncua thiab kev txhim kho ntawm cellulose ethers yuav tsum ua rau cov ntawv thov tshiab thiab kev lag luam rau cov khoom siv ntau yam hauv xyoo tom ntej.