Umlando Wokukhiqiza Nokucwaninga Kwe-Cellulose Ethers

Ama-cellulose ether anomlando omude wokukhiqiza nocwaningo, asukela ngasekupheleni kwekhulu le-19. I-cellulose ether yokuqala, i-ethyl cellulose, yasungulwa ngawo-1860 ngusokhemisi waseBrithani u-Alexander Parkes. Ekuqaleni kwawo-1900, enye i-cellulose ether, i-methyl cellulose, yasungulwa ngusokhemisi waseJalimane u-Arthur Eichengrün.

Phakathi nekhulu lama-20, ukukhiqizwa nokucwaninga kwama-cellulose ethers kwanda kakhulu. Ngawo-1920s, i-carboxymethyl cellulose (CMC) yasungulwa njenge-ether cellulose ether encibilika emanzini. Lokhu kwalandelwa ukuthuthukiswa kwe-hydroxyethyl cellulose (HEC) ngawo-1930, kanye ne-hydroxypropyl methyl cellulose (HPMC) ngawo-1950. Lawa ma-cellulose ethers asetshenziswa kabanzi namuhla ezimbonini eziningi, ezihlanganisa ukudla, ezemithi, izimonyo, nezokwakha.

Embonini yokudla, ama-cellulose ethers asetshenziswa njengama-thickeners, ama-emulsifiers, nama-stabilizers. Avame ukusetshenziswa emikhiqizweni efana nezingubo zesaladi, u-ayisikhilimu, nezinto ezibhakwayo. Embonini yezemithi, ama-cellulose ether asetshenziswa njengama-binder, ama-disintegrants, nama-coating agents kumaphilisi namaphilisi. Embonini yezimonyo, asetshenziswa njengama-ejenti okuqina kanye nama-emulsifiers kumakhilimu nama-lotions. Embonini yezokwakha, ama-cellulose ether asetshenziswa njengama-ejenti okugcina amanzi kanye nezithuthukisi zokusebenza kusimende nodaka.

Ucwaningo lwama-cellulose ethers lusaqhubeka kuze kube yilolu suku, ngokugxila ekuthuthukiseni ama-cellulose ether amasha nathuthukisiwe anezakhiwo nokusebenza okuthuthukisiwe. Ukuthuthuka kwezobuchwepheshe kuye kwaholela ekwakhiweni kwezindlela ezintsha zokukhiqiza ama-cellulose ether, njengokuguqulwa kwe-enzymatic nokuguqulwa kwamakhemikhali kusetshenziswa izinyibilikisi eziluhlaza. Ucwaningo oluqhubekayo nokuthuthukiswa kwama-cellulose ethers kulindeleke ukuthi kuholele ekusetshenzisweni okusha nezimakethe zalezi zinto ezisebenza ngezindlela eziningi eminyakeni ezayo.