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 ngumvelisi omkhulu wehlabathi wodaka 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 i-cellulose ethers. 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 lisezantsi, ukuphakama kwe-viscosity, kunye nesiphumo esicacileyo sokuqina kunye nokugcinwa kwamanzi.
Ixesha lokuposa: Apr-12-2023