Impembelelo ye-DS kwi-carboxymethyl cellulose Umgangatho

I-Carboxymethyl cellulose (CMC) iphuma kwi-cellulose enyibilikayo emanzini esetyenziswa kakhulu kumashishini ahlukeneyo, kubandakanya ukutya, amayeza, kunye nokhathalelo lomntu. Iqondo lokutshintshwa (DS) yiparameter ebalulekileyo echaphazela iimpawu zeCMC. Kweli nqaku, siza kuxubusha impembelelo ye-DS kumgangatho we-carboxymethyl cellulose.

Okokuqala, kubalulekile ukuqonda ukuba yintoni iqondo lokuthatha indawo. Iqondo lokutshintsha libhekisa kwinani lamaqela e-carboxymethyl ngeyunithi yeglucose kwikhonkco leselulosi. I-CMC iveliswa ngokusabela i-cellulose kunye ne-sodium monochloroacetate kunye ne-sodium hydroxide. Ngexesha lokusabela, amaqela e-hydroxyl kwikhonkco leselulosi athathelwa indawo ngamaqela e-carboxymethyl. Umgangatho wokutshintshwa unokulawulwa ngokutshintsha iimeko zokusabela, ezifana nokuxinana kwe-sodium hydroxide kunye ne-sodium monochloroacetate, ixesha lokuphendula, kunye nobushushu.

I-DS ye-CMC ichaphazela iipropati zayo zomzimba kunye neekhemikhali, ezifana nokunyibilika kwayo, i-viscosity, kunye nokuzinza kwe-thermal. I-CMC ene-DS ephantsi ineqondo eliphezulu lekristale kwaye ayinyibiliki kangako emanzini kune-CMC ene-DS ephezulu. Oku kungenxa yokuba amaqela e-carboxymethyl kwi-CMC ene-DS ephantsi abekwe kumphezulu wekhonkco le-cellulose, elinciphisa ukunyibilika kwayo emanzini. Ngokwahlukileyo, i-CMC ene-DS ephezulu inokwakheka kwe-amorphous kwaye i-soluble yamanzi ngakumbi kune-CMC ene-DS ephantsi.

I-viscosity ye-CMC ikwachatshazelwa yi-DS. I-CMC ene-DS ephantsi ine-viscosity esezantsi kune-CMC ene-DS ephezulu. Oku kungenxa yokuba amaqela e-carboxymethyl kwi-CMC ene-DS ephantsi ahlukaniswe ngakumbi, nto leyo inciphisa intsebenziswano phakathi kwamatyathanga e-cellulose kwaye yehlise i-viscosity. Ngokwahlukileyo, i-CMC ene-DS ephezulu ine-viscosity ephezulu kuba amaqela e-carboxymethyl asondelelene kunye, nto leyo eyandisa intsebenziswano phakathi kwamatyathanga e-cellulose kwaye iphakamisa i-viscosity.

Ukongeza kwiimpawu zayo zomzimba, i-DS ye-CMC ichaphazela iipropati zayo zekhemikhali. I-CMC ene-DS ephantsi ayizinzile kangako kumaqondo obushushu aphezulu kunye namaxabiso e-pH kune-CMC ene-DS ephezulu. Oku kungenxa yokuba amaqela e-carboxymethyl kwi-CMC ene-DS ephantsi achaphazeleka ngakumbi kwi-hydrolysis kwaye anokophuka phantsi kweemeko ezinzima. Ngokwahlukileyo, i-CMC ene-DS ephezulu izinzile ngakumbi kumaqondo aphezulu kunye namaxabiso e-pH kuba amaqela e-carboxymethyl abotshelelwe ngokuqinileyo kwikhonkco le-cellulose.