Ipropathi yeRheological yeMethyl cellulose Isisombululo

Iimpawu ze-rheological ze-methylcellulose (MC) isisombululo zibalulekile ekuqondeni ukuziphatha kwayo kunye nokusebenza kwizicelo ezahlukeneyo. I-rheology yezinto eziphathekayo ibhekisela ekuhambeni kwayo kunye neempawu ze-deformation phantsi koxinzelelo okanye uxinzelelo. Iimpawu ze-rheological zezisombululo ze-MC zinokuchatshazelwa zizinto ezinje ngoxinaniso, ubushushu, i-pH, kunye neqondo lokuthatha indawo.

Viscosity

I-Viscosity yenye yezona zinto zibalulekileyo ze-rheological zezisombululo ze-MC. I-MC yimathiriyeli ebonakalayo enokuthi yenze izisombululo ezingqindilili xa inyibilika emanzini. I-viscosity yezisombululo ze-MC ixhomekeke kugxininiso lwesisombululo, iqondo lokutshintshwa, kunye nobushushu. Ukuphakama koxinzelelo lwesisombululo, iphezulu i-viscosity yesisombululo. Iqondo lokutshintshwa kwakhona lichaphazela i-viscosity yezisombululo ze-MC. I-MC eneqondo eliphezulu lokuthatha indawo ine-viscosity ephezulu xa kuthelekiswa ne-MC eneqondo eliphantsi lokutshintshwa. Ubushushu bunokuchaphazela i-viscosity yezisombululo ze-MC. I-viscosity yezisombululo ze-MC iyancipha ngokunyuka kweqondo lokushisa.

Shear Ukuthina Ukuziphatha

Izisombululo ze-MC zibonisa ukuziphatha kokucheba, okuthetha ukuba i-viscosity yabo iyancipha phantsi koxinzelelo lokucheba. Xa uxinzelelo lwe-shear lusetyenziswe kwisisombululo se-MC, i-viscosity iyancipha, ivumela isisombululo ukuba sihambe ngokulula. Le propati ibalulekile kwizicelo apho isisombululo kufuneka sihambe ngokulula ngexesha lokucubungula, kodwa kufuneka sigcine ubukhulu kunye nokuzinza xa siphumla.

Gelation Ukuziphatha

Izisombululo ze-MC zinokungena kwi-gelation xa zishushu ngaphezu kobushushu obuthile. Le propati ixhomekeke kwiqondo lokutshintshwa kwe-MC. I-MC eneqondo eliphezulu lokutshintshwa inobushushu obuphezulu be-gelation xa kuthelekiswa ne-MC eneqondo eliphantsi lokutshintshwa. Ukuziphatha kwe-gelation yezisombululo ze-MC kubalulekile kwizicelo ezifana nokuveliswa kweejeli, iijeli, kunye needessert.

Thixotropy

Izisombululo ze-MC zibonisa ukuziphatha kwethixotropic, okuthetha ukuba i-viscosity yabo iyancipha ngokuhamba kwexesha xa bephumle. Xa uxinzelelo lwe-shear lusetyenziswe kwisisombululo, i-viscosity iyanda.