I-Cellulose Ether– Ukutyeba kunye Thixotropy
Iselulosi etherinika udaka olumanzi kunye ne-viscosity egqwesileyo, enokunyusa kakhulu ukunamathela phakathi kodaka olumanzi kunye nomgangatho wesiseko, iphucule ukusebenza kokuhamba kodaka, kwaye isetyenziswa ngokubanzi kudaka lokutyabeka, i-ceramic tile bonding mortar, kunye nenkqubo yokugquma eludongeni yangaphandle.Isiphumo esityebileyo se-ether yeselulosi sinokwandisa amandla okusasazwa kunye nokufana kwezinto ezintsha, kunye nokuthintela ukuhluzwa kwezinto, ukwahlukana, kunye ne-seepage.Ingasetyenziselwa ifayibha eyomeleziweyo ikhonkrithi, ikhonkrithi ephantsi kwamanzi, kunye nekhonkrithi ezidibanisayo.
Isiphumo sokujiya kwei-cellulose etherkwizinto ezisekelwe kwisamente zivela kwi-viscosity yesisombululo se-cellulose ether.Ngaphantsi kweemeko ezifanayo, ukuphakama kwe-viscosity yei-cellulose ether, ngcono i-viscosity yezinto eziguquliweyo ezisekelwe kwi-samente.Nangona kunjalo, ukuba i-viscosity iphezulu kakhulu, iya kuchaphazela ukuhamba kunye nokusebenza kwezinto (ezifana neemela zokutyabeka).Udaka lokuzilinganisa ngokwakho, ikhonkrithi ezenzelayo, njl.njl. kufuna ulwelo oluphezulu, kwaye i-viscosity ye-cellulose ether iphantsi kakhulu.Ukongeza, umphumo wokuqina we-cellulose ether uya kwandisa imfuno yamanzi ye-samente substrate kunye nokwandisa imveliso yodaka.
Isisombululo samanzi se-viscosity cellulose ether ephezulu ine-thixotropy ephezulu, ekwayimpawu ye-cellulose ether.Isinyibiliko se-aqueous se-methyl cellulose sikholisa ukuba ne-pseudoplastic kunye ne-non-thixotropic flow properties ezingaphantsi kobushushu bejeli, kodwa sibonisa ukuhamba kwe-Newtonian ngesantya esisezantsi sokucheba.Kungakhathaliseki ukuba luhlobo luni kunye neqondo lokutshintshwa kwezinto ezithatha indawo, i-pseudoplasticity iyanda ngokunyuka kobunzima be-molecular okanye i-concentration ye-cellulose ether.Ke ngoko, nje ukuba ugxininiso kunye nobushushu buhlala buhleli, i-cellulose ethers kunye nebakala elifanayo le-viscosity (kungakhathaliseki ukuba yi-MC),HPMC, HEMC) ihlala ibonisa iimpawu ezifanayo zerheological.Xa ukushisa kuphakama, iifom ze-gel zesakhiwo kunye nokuhamba okuphezulu kwe-thixotropic kwenzeka.
Iselulosi etherabavelisi bakuxelela ukuba i-cellulose ether ene-concentration ephezulu kunye ne-viscosity ephantsi ine-thixotropy naphantsi kobushushu be-gel.Lo mhlaba uluncedo kakhulu ekwakhiweni kodaka ukulungisa umgangatho kunye nokuncipha.Kufuneka kuqatshelwe ukuba iphezulu i-viscosity yei-cellulose ether, kokukhona ukugcinwa kwayo kwamanzi kubhetele.Nangona kunjalo, iphezulu i-viscosity, iphezulu ubunzima bemolekyuli ye-cellulose ether, kunye nokuncipha okuhambelanayo ekunyibilikeni kwayo.Inempembelelo embi ekugxininiseni nasekuqhubekeni kodaka.
I-Cellulose Ether- Ilibazisekile
Iselulosi etherinokwandisa ixesha lokumisela i-sement slurry okanye udaka, ukulibazisa i-hydration kinetics ye-samente, kunye nokuphucula ubomi benkonzo yezinto ezintsha, ngaloo ndlela kuphuculwe ukuhambelana kwe-slump phakathi kodaka kunye nekhonkrithi.Iqondo lelahleko ekuhambeni kwexesha, kodwa lisenokulibazisa inkqubela phambili yokwakha.
Ixesha lokuposa: Aug-25-2023