Iko kukora mhedzisiro ye cellulose ether kunoenderana ne: dhigirii repolymerization ye cellulose ether, solution concentration, shear rate, tembiricha uye mamwe mamiriro. Iyo gelling pfuma yemushonga inzvimbo yealkyl cellulose uye yakagadziridzwa maderivatives. Iyo gelation zvivakwa zvine hukama neiyo dhigirii yekutsiva, kugadzirisa kugadzirisa uye zvinowedzera. Kune hydroxyalkyl yakagadziridzwa derivatives, iyo gel zvivakwa zvine hukamawo nedhigirii rekuchinja rehydroxyalkyl. Kune yakaderera viscosity MC uye HPMC, 10% -15% mhinduro inogona kugadzirirwa, yepakati viscosity MC uye HPMC inogona kugadzirirwa 5% -10% mhinduro, nepo yakakwirira viscosity MC uye HPMC inogona chete kugadzirira 2% -3% mhinduro, uye Kazhinji. iyo viscosity classification ye cellulose ether inoiswawo grade 1% -2% mhinduro.
High molecular weight cellulose ether ine high thickening kunyatsoita. Mune imwecheteyo yekugadzirisa mhinduro, mapolymer ane akasiyana ma molecular uremu ane akasiyana viscosities. High degree. Iyo inonangwa viscosity inogona kuwanikwa chete nekuwedzera yakawanda yakaderera molecular uremu cellulose ether. Viscosity yaro haina kutsamira pachiyero chekuveura, uye iyo yakakwira viscosity inosvika painotariswa viscosity, uye iyo inodiwa yekuwedzera mari idiki, uye viscosity zvinoenderana nekukora kwekuita. Naizvozvo, kuti uwane imwe kuenderana, imwe chiyero che cellulose ether (concentration yemhinduro) uye mhinduro viscosity inofanirwa kuve nechokwadi. Iyo tembiricha yegel yemushonga zvakare inodzikira mutsetse nekuwedzera kwekusangana kwemhinduro, uye gels pane tembiricha yekamuri mushure mekusvika kumwe kusungwa. Iyo gelling concentration yeHPMC yakakwira zvakanyanya pakamuri tembiricha.
Consistency inogonawo kugadziriswa nekusarudza particle size uye kusarudza cellulose ethers ane madhigirii akasiyana ekugadzirisa. Iyo inonzi shanduko ndeye kuunza imwe dhigirii yekutsiva yemapoka ehydroxyalkyl pane skeleton chimiro cheMC. Nekushandura hukama hwekutsinhanisa hunhu hwevaviri vanotsiva, kureva, iyo DS uye ms hama inotsiviwa tsika dzemethoxy uye hydroxyalkyl mapoka atinowanzo kutaura. Zvido zvakasiyana-siyana zvekushanda zve cellulose ether zvinogona kuwanikwa kuburikidza nekushandura hukama hunotsiviwa hwezviviri zvinotsiva.
Ukama huri pakati pekusagadzikana nekugadzirisa: kuwedzerwa kwe cellulose ether kunokanganisa kushandiswa kwemvura kwedhaka, kushandura mvura-binder ratio yemvura uye simenti ndiko kuwedzera kwekuita, iyo yakakwirira yeroji, iyo inowedzera kushandiswa kwemvura.
Cellulose ethers inoshandiswa muupfu zvivakwa zvekuvaka inofanirwa kunyungudika nekukurumidza mumvura inotonhora uye inopa kuenderana kwakakodzera kwehurongwa. Kana yakapihwa imwe shear rate, inoramba ichivhurika uye colloidal block, iri pasi pemhando kana yakashata mhando chigadzirwa.
Kune zvakare hukama hwakanaka hwemutsara pakati pekuenderana kwesamende paste uye dosi ye cellulose ether. Cellulose ether inogona kuwedzera zvakanyanya viscosity yedhaka. Iyo yakakura dosage, zvinonyanya kuoneka mugumisiro. High-viscosity cellulose ether aqueous solution ine high thixotropy, iyo iriwo hunhu hukuru hwe cellulose ether. Aqueous solutions yeMC polymers kazhinji ane pseudoplastic uye isiri-thixotropic fluidity pazasi petembiricha yavo yegel, asi Newtonian inoyerera zvivakwa pazasi shear mitengo. Pseudoplasticity inowedzera nehuremu hwemamorekuru kana kuungana kweselulosi ether, zvisinei nerudzi rwechinotsiva uye dhigirii rekutsiva. Nokudaro, cellulose ethers yegiredhi rimwechete viscosity, zvisinei MC, HPMC, HEMC, inogara ichiratidza zvakafanana rheological properties chero bedzi kusungirirwa uye kutonhora kuchichengetwa nguva dzose.
Magero ekugadzira anoumbwa kana tembiricha yakasimudzwa, uye yakanyanya thixotropic inoyerera inoitika. High concentration uye low viscosity cellulose ethers inoratidza thixotropy kunyange pasi pekushisa kwegel. Ichi chivakwa chinobatsira zvikuru kugadziridzwa kwemazinga uye kusagika mukuvaka dhaka rekuvaka. Zvinoda kutsanangurwa pano kuti kukwirisa viscosity ye cellulose ether, zviri nani kuchengetwa kwemvura, asi iyo yakakwira viscosity, iyo inokwira yakaenzana molecular uremu hwe cellulose ether, uye kuderera kunoenderana mukunyungudika kwayo, uko kune kukanganisa kwakashata. pamusoro pekugadzirisa kwedhaka uye kushanda kwekuvaka. Iyo yakakwirira viscosity, iyo inonyanya kuoneka iyo thickening maitiro padhaka, asi haina kuenzana zvachose. Imwe yepakati uye yakaderera viscosity, asi iyo yakagadziridzwa cellulose ether ine zvirinani kuita mukuvandudza simba rechimiro chedhaka rakanyorova. Nekuwedzera kwe viscosity, kuchengetwa kwemvura kwe cellulose ether kunovandudza.
Nguva yekutumira: Feb-16-2023