Kwiminyaka yakutshanje, kunye nokuphunyezwa ngokuthe ngcembe kwemigaqo-nkqubo efanelekileyo yokubambelela kwingqikelelo yophuhliso lwezenzululwazi kunye nokwakha uluntu olugcina imithombo yobutyebi, udaka lokwakha lwelizwe lam lujongene nokutshintsha kodaka lwemveli ukuya eludaka oluxutyiweyo, kunye nolwakhiwo oluxubeneyo. ishishini lodaka lingene kuphuhliso olukhawulezayo.umzila we.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. Okwangoku, uninzi lweemveliso ze-cellulose ether zehlabathi zisetyenziswa kwizinto zokwakha.Ngophuhliso olukhawulezayo lweshishini lodaka oluxutyiweyo, i-cellulose ether yelizwe lam iphumelele ngokusisiseko, kwaye imeko yeemveliso zangaphandle ezilawula imarike yophukile.Ngokunyuka kokuthandwa kokusetyenziswa kweemveliso zodaka ezinomxube owomileyo, ilizwe lam liya kuba ngumvelisi omkhulu wehlabathi wodaka oluxutyiweyo, ukusetyenziswa kwe-cellulose ether kuya kwanda ngakumbi, kwaye abavelisi bayo kunye neentlobo zemveliso 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. Ukucoleka kwe-ether cellulose
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.Ukuthetha ngokubanzi, intsalela yesisefu ye-ether ye-cellulose fineness engaphezu kwe-0.212mm akufanele idlule kwi-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.Iqondo lokushisa lejeli lisetyenziselwa ukugqiba uhlobo lwe-cellulose ether, ehambelana neqondo lokutshintshwa kwe-cellulose ether.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: Feb-27-2023