I-Cellulose Ether– Ukuqina kanye Thixotropy
I-cellulose etherifaka udaka olumanzi olune-viscosity enhle kakhulu, engakhuphula kakhulu ukunamathela phakathi kodaka olumanzi kanye nongqimba oluyisisekelo, ithuthukise ukusebenza kokugeleza kodaka, futhi isetshenziswa kabanzi ekwenzeni udaka, udaka lwe-ceramic bonding, kanye nohlelo lwangaphandle lokufakwa kwezindonga.Umthelela wokujiya we-cellulose ether ungaphinda ukhuphule ikhono lokunqanda ukuhlakazeka kanye nokufana kwezinto ezisetshenziswayo ezintsha, futhi uvimbele ukuhlukaniswa kwempahla, ukuhlukaniswa, nokuphuma kwamanzi.Ingasetshenziselwa ukhonkolo oqiniswe ngefayibha, ukhonkolo ongaphansi kwamanzi, kanye nokhonkolo ozihlanganisayo.
Ukuqina komphumela wei-cellulose etherezintweni ezisekelwe kusimende zivela ku-viscosity yesisombululo se-cellulose ether.Ngaphansi kwezimo ezifanayo, i-viscosity ephakeme kakhului-cellulose ether, kuba ngcono i-viscosity yezinto ezisekelwe kusimende eziguquliwe.Kodwa-ke, uma i-viscosity iphezulu kakhulu, izophazamisa ukugeleza nokusebenza kwempahla (njengemimese yokuplasta).Udaka lokuzilinganisa, ukhonkolo ozihlanganisayo, njll. kudinga uketshezi oluphezulu, futhi i-viscosity ye-cellulose ether iphansi kakhulu.Ngaphezu kwalokho, umphumela wokuqina we-cellulose ether uzophinde ukhulise isidingo samanzi se-substrate kasimende futhi ukhulise ukukhiqizwa kodaka.
Isixazululo esinamanzi se-high viscosity cellulose ether sine-thixotropy ephezulu, ephinde ibe yisici se-cellulose ether.Isixazululo esinamanzi se-methyl cellulose ngokuvamile sinezinto zokugeleza ze-pseudoplastic nezingezona ze-thixotropic ezingaphansi kwezinga lokushisa lejeli, kodwa sibonisa ukugeleza kwe-Newtonian ngenani eliphansi lokushear.Kungakhathalekile ukuthi hlobo luni kanye nezinga lokushintshwa kwezinto ezifakwe esikhundleni, i-pseudoplasticity iyanda ngokukhuphuka kwesisindo se-molecular noma ukugxila kwe-cellulose ether.Ngakho-ke, inqobo nje uma ukugxila kanye nezinga lokushisa lihlala lingashintshile, ama-cellulose ethers anebanga elifanayo le-viscosity (kungakhathaliseki ukuthi i-MC),I-HPMC, I-HEMC) njalo ibonisa izici ezifanayo ze-rheological.Lapho izinga lokushisa likhuphuka, amafomu ejeli esakhiwo kanye nokugeleza okuphezulu kwe-thixotropic kwenzeka.
I-cellulose etherabakhiqizi bakutshela ukuthi i-cellulose ether ene-concentration ephezulu kanye ne-viscosity ephansi ine-thixotropy ngisho nangaphansi kokushisa kwe-gel.Lesi sakhiwo sizuzisa kakhulu ekwakhiweni kodaka ukuze kulungiswe izinga nokuwohloka kwalo.Kufanele kuqashelwe ukuthi ephakeme viscosity ofi-cellulose ether, kungcono ukugcina amanzi.Kodwa-ke, ukuphakama kwe-viscosity, kuya phezulu kwesisindo samangqamuzana e-cellulose ether, kanye nokwehla okuhambisanayo ekuncibilikeni kwayo.Kunomthelela omubi ekugxilweni nasekusebenzeni kodaka.
I-Cellulose Ether- Ibambezelekile
I-cellulose etheringanweba isikhathi sokumisa udaka lukasimende noma udaka, ibambezele i-hydration kinetics kasimende, futhi ithuthukise impilo yesevisi yezinto ezintsha, ngaleyo ndlela ithuthukise ukuhambisana kokuwohloka phakathi kodaka nokhonkolo.Izinga lokulahlekelwa ngokuhamba kwesikhathi, kodwa lingase futhi libambezele ukuqhubeka kokwakhiwa.
Isikhathi sokuthumela: Aug-25-2023