Njengomxube obaluleke kakhulu ekwakheni iimveliso zodaka ezomileyo, i-cellulose ether idlala indima ephambili ekusebenzeni kunye neendleko zodaka oluxubileyo.Kukho iindidi ezimbini ze-cellulose ethers: enye i-ionic, njenge-sodium carboxymethyl cellulose (CMC), kwaye enye i-non-ionic, njenge-methyl cellulose (MC), i-hydroxyethyl cellulose (HEC), i-Hydroxypropyl cellulose (HPMC), njl. Ngokunyuka kokuthandwa kokusetyenziswa kweemveliso zodaka oluxutywe ngoomileyo, ilizwe lam liya kuba lelona hlabathi livelisa udaka oluxutyiweyo, ukusetyenziswa kwe-cellulose ether kuya kwanda ngakumbi, kwaye abavelisi bayo kunye neentlobo zemveliso nazo ziya kwanda.Ukusebenza kwemveliso ye-cellulose ether kwi-dry-mixed mortar ibe yingqwalasela yabavelisi kunye nabasebenzisi.
Ipropati ebaluleke kakhulu ye-cellulose ether kukugcinwa kwayo kwamanzi kwizinto zokwakha.Ngaphandle kokongezwa kwe-cellulose ether, umaleko obhityileyo wodaka olutsha loma ngokukhawuleza kangangokuba i-samente ayikwazi ukuhambisa amanzi ngendlela eqhelekileyo kwaye udaka alukwazi ukuqina kwaye lufezekise ukuhambelana kakuhle.Ngelo xesha, ukongezwa kwe-cellulose ether kwenza umdaka ube neplastiki elungileyo kunye nokuguquguquka, kwaye uphucula amandla okubopha udaka.Makhe sithethe ngempembelelo ekusetyenzisweni kodaka oluxubeneyo oluxutywe kwimveliso yemveliso ye-cellulose ether.
1. Ukulunga kweselulosi
Ukucoleka kwe-ether cellulose kuchaphazela ukunyibilika kwayo.Umzekelo, ukuthoba ukucoleka kwe-cellulose ether, ngokukhawuleza inyibilika emanzini kunye nokuphuculwa kokusebenza kokugcinwa kwamanzi.Ngoko ke, ukucolwa kwe-ether ye-cellulose kufuneka kufakwe njengenye yeempawu zayo zophando.Xa sithetha ngokubanzi, intsalela yesisefu ye-ether ye-cellulose yokulunga ngaphezu kwe-0.212mm akufunekanga ibe ngaphezu kwe-8.0%.
2. Ukomisa izinga lokulahleka kwesisindo
Ukomisa izinga lokulahlekelwa ubunzima libhekisela kwipesenti yobunzima bezinto ezilahlekileyo kubunzima besampulu yokuqala xa i-ether cellulose yomile kwiqondo lokushisa elithile.Ngomgangatho othile we-cellulose ether, izinga lokumisa ukulahleka kwesisindo liphezulu kakhulu, eliya kunciphisa umxholo wezithako ezisebenzayo kwi-cellulose ether, ichaphazela umphumo wesicelo samashishini asezantsi, kunye nokwandisa iindleko zokuthenga.Ngokuqhelekileyo, ukulahlekelwa kwesisindo ekomisweni kwe-cellulose ether akukho ngaphezu kwe-6.0%.
3. I-Sulfate ash content ye-cellulose ether
Ngomgangatho othile we-cellulose ether, umxholo womlotha uphezulu kakhulu, oya kunciphisa umxholo wezithako ezisebenzayo kwi-cellulose ether kunye nokuchaphazela umphumo wesicelo samashishini asezantsi.Umxholo we-sulfate ash we-cellulose ether ngumlinganiselo obalulekileyo wokusebenza kwayo.Idityaniswe nemeko yangoku yemveliso yelizwe lam ezikhoyo abenzi cellulose ether, ngokuqhelekileyo isiqulatho uthuthu MC, HPMC, HEMC kufuneka ingadluli 2.5%, kunye isiqulatho uthuthu HEC cellulose ether kufuneka ingadluli 10.0%.
4. I-Viscosity ye-cellulose ether
Ukugcinwa kwamanzi kunye nesiphumo sokuqina kwe-cellulose ether ikakhulu kuxhomekeke kwi-viscosity kunye ne-dosage ye-cellulose ether ngokwayo eyongeziweyo kwi-sement slurry.
5. Ixabiso le-pH le-cellulose ether
I-viscosity yeemveliso ze-cellulose ether iya kuncipha ngokuthe ngcembe emva kokugcinwa kwiqondo lokushisa eliphezulu okanye ixesha elide, ngakumbi kwiimveliso eziphezulu ze-viscosity, ngoko ke kuyimfuneko ukunciphisa i-pH.Ngokuqhelekileyo, kuyacetyiswa ukulawula uluhlu lwe-pH lwe-cellulose ether ukuya kwi-5-9.
6. Ukuhanjiswa kokukhanya kwe-cellulose ether
Ukuhanjiswa kokukhanya kwe-cellulose ether kuchaphazela ngokuthe ngqo umphumo wayo wesicelo kwizinto zokwakha.Izinto eziphambili ezichaphazela ukuhanjiswa kokukhanya kwe-cellulose ether zezi: (1) umgangatho wezinto eziluhlaza;(2) umphumo we-alkalization;(3) umlinganiselo wenkqubo;(4) umlinganiselo wokunyibilikisa;(5) isiphumo sokungathathi hlangothi.Ngokomphumo wokusetyenziswa, ukuhanjiswa kokukhanya kwe-cellulose ether akufanele kube ngaphantsi kwe-80%.
7. Ubushushu bejeli ye-cellulose ether
I-cellulose ether isetyenziswa kakhulu njenge-viscosifier, i-plasticizer kunye ne-agent yokugcinwa kwamanzi kwiimveliso zesamente, ngoko i-viscosity kunye nobushushu be-gel ziyimilinganiselo ebalulekileyo yokubonakalisa umgangatho we-cellulose ether.Ubushushu bejeli busetyenziselwa ukugqiba uhlobo lwe-cellulose ether, ehambelana neqondo lokutshintshwa kwezinye ii-ether ze-cellulose.Ukongezelela, ityuwa kunye nokungcola kunokuchaphazela nobushushu be-gel.Xa ukushisa kwesisombululo kuphakama, i-polymer cellulose ngokuthe ngcembe ilahlekelwa ngamanzi, kwaye i-viscosity yesisombululo iyancipha.Xa i-gel point ifikeleleke, i-polymer iphelile ngokupheleleyo kwaye yenza i-gel.Ngoko ke, kwiimveliso zesamente, ukushisa ngokuqhelekileyo kulawulwa ngaphantsi kweqondo lokushisa lokuqala le-gel.Ngaphantsi kwesi simo, iqondo lokushisa liphantsi, liphezulu i-viscosity, kwaye isiphumo esicacileyo sokuqina kunye nokugcinwa kwamanzi.
Ixesha lokuposa: Jun-01-2023