Cellulose Ether- Dhumucda iyo Thixotropy
Eter cellulosewuxuu siinayaa hoobiye qoyan oo leh viscosity aad u fiican, kaas oo si weyn u kordhin kara isku dhejinta u dhexeeya hoobiye qoyan iyo lakabka salka, hagaajinta waxqabadka anti-socodka ee hoobiye, waxaana si ballaaran loo isticmaalaa in lagu dhejiyo hoobiye, dhoobada dhoobada dhoobada, iyo nidaamka daboolka derbiga dibadda.Saamaynta dhumucda ether-ka cellulose waxa kale oo ay kordhin kartaa awoodda kala firdhisanaanta ka hortagga iyo isku-duubnaanta alaabta cusub, waxayna ka hortagtaa kala-soocidda walxaha, kala-soocidda, iyo dheecaanka.Waxaa loo isticmaali karaa shubka la xoojiyay ee fiber-ka, shubka biyaha hoostooda, iyo shubka is-xakamaynta.
Saamaynta dhumucdaether celluloseon walxaha sibidhka ku salaysan waxay ka yimaadaan viscosity of cellulose ether xal.Under shuruudaha la mid ah, the sare viscosity eeether cellulose, sida ugu wanagsan ee viscosity ee alaabta cement-ku-salaysan ee la beddelay.Si kastaba ha ahaatee, haddii viscosity-ku aad u sarreeyo, waxay saameyn doontaa socodka iyo shaqeynta walxaha (sida mindiyaha dhejiska).Hoobiyeyaasha is-simeeya, shubka is-xakamaynta, iwm. waxay u baahan yihiin dareere sare, iyo viscosity ether-ka cellulose aad buu u hooseeyaa.Intaa waxaa dheer, saameynta dhumucda ee ether cellulose waxay sidoo kale kordhin doontaa baahida biyaha ee substrate-ka sibidhka iyo kordhinta wax soo saarka hoobiye.
Xalka biyaha ee ether-ka unuggu wuxuu leeyahay thixotropy sare, taas oo sidoo kale ah sifo eter cellulose ah.Xalka biyaha leh ee methyl cellulose wuxuu badanaa leeyahay hanti-socod pseudoplastic iyo kuwa aan thixotropic ahayn oo ka hooseeya heerkulka jelka, laakiin wuxuu soo bandhigaa qulqulka Newtonian ee heerka xiirid hooseeya.Iyadoo aan loo eegin nooca iyo heerka beddelka beddelka, pseudoplasticity waxay kordhisaa korodhka miisaanka molecular ama xoojinta etherka cellulose.Sidaa darteed, ilaa inta diirada iyo heerkulku ay yihiin kuwo joogto ah, ethers cellulose oo leh darajada viscosity isku mid ah (iyadoon loo eegin MC,HPMC, HEMC) had iyo jeer muujiyaan sifooyinka rheological isku mid ah.Marka heerkulku kor u kaco, jel-dhismeedka qaab-dhismeedka iyo socodka thixotropic sare ayaa dhacaya.
Eter cellulosesoo saarayaasha ayaa kuu sheegaya in ether-ka cellulose oo leh feejignaan sare iyo viscosity hoose uu leeyahay thixotropy xitaa heerkulka jel.Hantidani aad bay faa'iido ugu leedahay dhismaha hoobiye si uu u hagaajiyo heerkiisa iyo hoostiisa.Waa in la ogaadaa in sare ee viscosity eeether cellulose, sida ugu wanagsan ee ay u haynta biyaha.Si kastaba ha ahaatee, marka uu sareeyo viscosity, ayaa sare u kacaya miisaanka molecular qaraabo ah ether cellulose, iyo hoos u dhigma ee ay milanka.Waxay saameyn xun ku leedahay fiirsashada iyo habsocodka hoobiye.
Cellulose Ether- Dib u dhac
Eter cellulosewaxay dheerayn kartaa wakhtiga dejinta ee dareeraha sibidhka ama hoobiye, dib u dhigi kartaa kinetics fuuq-celinta sibidhka, iyo hagaajinta nolosha adeegga alaabta cusub, taas oo hagaajinaysa joogtaynta slump ee u dhexeeya hoobiye iyo shubka.Heerka lumitaanka waqti ka dib, laakiin sidoo kale waxay dib u dhigi kartaa horumarka dhismaha.
Waqtiga boostada: Agoosto-25-2023