Ii-cellulose ethers zii-polymers ezenziwe nge-cellulose yendalo kwaye ziguqulwe ngokweekhemikhali. I-cellulose ether sisiphumo se-cellulose yendalo. Ngokungafaniyo nee-polymers ezenziweyo, ukuveliswa kwe-cellulose ether kusekelwe kwi-cellulose, eyona nto isisiseko, i-polymer compound yendalo. Ngenxa yobuchule besakhiwo se-cellulose yendalo, i-cellulose ngokwayo ayinakho ukusabela kunye nee-etherizers ezitshisayo. Nangona kunjalo, emva konyango lwe-solubilizers, ii-hydrogen bonds ezinamandla phakathi nangaphakathi kwee-molecular chains ziyatshatyalaliswa, kwaye umsebenzi weqela le-hydroxyl ukhutshwa kwi-alkali cellulose enekhono lokusabela, kwaye emva kokusabela kwe-etherizer etshisayo iqela le-OH liguqulwa libe liqela le-OR ukuze lifumane i-cellulose ether.
Ii-ether ze-cellulose zinempembelelo ebonakalayo yokungenisa umoya kwizinto ezisandula ukuxutywa ngesamente. Ii-ether ze-cellulose zineqela le-hydrophilic (hydroxyl, ether) kunye ne-hydrophobic (methyl, glucose ring) kwaye ziyi-surfactants ezinomsebenzi womphezulu kwaye ngaloo ndlela zinempembelelo yokungenisa umoya. Impembelelo yokungenisa umoya ye-ether ye-cellulose iya kuvelisa isiphumo "sebhola", esinokuphucula ukusebenza kwezinto ezintsha, njengokwandisa i-plasticity kunye nokuthamba kwesamente ngexesha lokusebenza, okuluncedo ekusasazekeni kwesamente; kuya kuphucula isivuno sesamente kwaye kunciphise iindleko zokuveliswa kwesamente; nangona kunjalo, kuya kwandisa i-porosity yezinto eziqinileyo kwaye kunciphise amandla azo kunye ne-elastic modulus, njl. Iimpawu ze-mechanical.
Njenge-surfactant, i-cellulose ether ikwanayo nefuthe lokumanzisa okanye lokuthambisa kwiisuntswana zesamente, nto leyo kunye nefuthe layo lokungenisa umoya linyusa ukunyibilika kwezinto eziqinisayo, kodwa ifuthe layo lokutyeba linciphisa ukunyibilika, kwaye ifuthe le-cellulose ether ekunyibilikeni kwezinto eziqinisayo ludibaniso lweziphumo zokwenziwa kweplastiki kunye nokutyeba. Ngokubanzi, xa ubungakanani be-cellulose ether buphantsi kakhulu, bubonisa ikakhulu ifuthe lokwenziwa kweplastiki okanye ukunciphisa amanzi; xa ubungakanani buphezulu, ifuthe lokuqina kwe-cellulose ether liyanda ngokukhawuleza, kwaye ifuthe layo lokungenisa umoya lidla ngokugcwala, ngoko ke libonisa ifuthe lokuqina okanye lonyusa imfuneko yamanzi.
Ixesha lokuthumela: Epreli-24-2022