Imbali yoMveliso kunye noPhando lweCellulose Ethers

I-cellulose ethers inembali ende yemveliso kunye nophando, eqala emva kwekhulu le-19 leminyaka. I-cellulose ether yokuqala, i-ethyl cellulose, yaphuhliswa ngo-1860 yi-British chemist u-Alexander Parkes. Ekuqaleni kwee-1900s, enye i-cellulose ether, i-methyl cellulose, yaphuhliswa ngusokhemisti waseJamani u-Arthur Eichengrün.

Ngenkulungwane yama-20, ukuveliswa kunye nophando lwe-cellulose ethers kwanda kakhulu. Ngeminyaka yee-1920, i-carboxymethyl cellulose (CMC) yaphuhliswa njenge-ether ye-cellulose e-soluble yamanzi. Oku kwalandelwa kukuphuhliswa kwe-hydroxyethyl cellulose (HEC) kwi-1930s, kunye ne-hydroxypropyl methyl cellulose (HPMC) kwi-1950s. Ezi cellulose ethers zisetyenziswa ngokubanzi namhlanje kuluhlu lwemizi-mveliso, kuquka ukutya, amayeza, izinto zokuthambisa, nokwakha.

Kwishishini lokutya, ii-cellulose ethers zisetyenziswa njengezinto ezityebisayo, izifakeli-manzi, nezizinzisi. Ngokuqhelekileyo zisetyenziswa kwiimveliso ezifana nokunxitywa kwesaladi, i-ayisikrimu, kunye nezinto ezibhakiweyo. Kwishishini lamachiza, i-cellulose ethers isetyenziswa njenge-binders, i-disintegrants, kunye ne-coating agents kwiipilisi kunye nee-capsules. Kwishishini lezithambiso, zisetyenziswa njengee-agent ezityebisayo kunye ne-emulsifiers kwi-creams kunye ne-lotions. Kwishishini lokwakha, i-cellulose ethers isetyenziswa njengeejenti zokugcina amanzi kunye neziphuculi zokusebenza kwi-samente kunye nodaka.

Uphando kwi-cellulose ethers luyaqhubeka nanamhla, lugxininise ekuphuhliseni ii-ether ze-cellulose ezintsha kunye neziphuculweyo ezineempawu eziphuculweyo kunye nokusebenza. Ukuqhubela phambili kwezobuchwepheshe kuye kwakhokelela ekuphuhlisweni kweendlela ezintsha zokuvelisa i-cellulose ethers, ezifana nokuguqulwa kwe-enzymatic kunye nokuguqulwa kweekhemikhali usebenzisa i-solvents eluhlaza. Uphando oluqhubekayo kunye nophuhliso lwe-cellulose ethers kulindeleke ukuba lukhokele kwizicelo ezitsha kunye neemarike zezi zixhobo eziguquguqukayo kwiminyaka ezayo.