Eminyakeni yamuva nje, ngokusetshenziswa kancane kancane kwezinqubomgomo ezifanele zokunamathela emcabangweni wentuthuko yesayensi nokwakha umphakathi osindisa izinsiza, udaka lokwakha wezwe lami lubhekene noshintsho kusuka kudaka lwendabuko luye kudaka oluxubene nodaka, kanti imboni yokwakha idaka elixubene nodaka ingenile ekuthuthukisweni okusheshayo. Njengokuhlanganiswa okubaluleke kakhulu ekwakheni imikhiqizo yodaka oluxubene nodaka, i-cellulose ether idlala indima ebalulekile ekusebenzeni nasezindleko zodaka oluxubene nodaka. Kunezinhlobo ezimbili zama-cellulose ethers: eyodwa iyi-ionic, njenge-sodium carboxymethyl cellulose (CMC), kanti enye ayiyona i-ionic, njenge-methyl cellulose (MC), i-hydroxyethyl cellulose (HEC), i-Hydroxypropyl cellulose (HPMC), njll. Njengamanje, iningi lemikhiqizo ye-cellulose ether yomhlaba wonke isetshenziswa ezintweni zokwakha. Ngokuthuthuka okusheshayo kwemboni yodaka oluxubene nodaka, i-cellulose ether yezwe lami isifinyelele endaweni, futhi isimo semikhiqizo yangaphandle elawula imakethe siphukile. Njengoba ukusetshenziswa kwemikhiqizo yodaka oluxutshwe nowomile kuthandwa kakhulu, izwe lami lizoba ngumkhiqizi omkhulu kunabo bonke emhlabeni wodaka oluxutshwe nowomile, ukusetshenziswa kwe-cellulose ether kuzokhula kakhulu, futhi abakhiqizi bayo kanye nezinhlobo zemikhiqizo nazo zizokhula. Ukusebenza komkhiqizo we-cellulose ether kudaka oluxutshwe nowomile sekuyinto egxile kakhulu kubakhiqizi nabasebenzisi.
Isici esibaluleke kakhulu se-cellulose ether ukugcina amanzi ezintweni zokwakha. Ngaphandle kokwengezwa kwe-cellulose ether, ungqimba oluncane lwe-mortar entsha loma ngokushesha kangangokuthi usimende awukwazi ukumanzisa ngendlela evamile futhi i-mortar ayikwazi ukuqina futhi ifinyelele ukuhlangana okuhle. Ngesikhathi esifanayo, ukwengezwa kwe-cellulose ether kwenza i-mortar ibe ne-plasticity enhle kanye nokuguquguquka, futhi kuthuthukisa amandla okubopha kwe-mortar. Ake sixoxe ngomthelela ekusetshenzisweni kwe-mortar exutshwe okomile ekusebenzeni komkhiqizo we-cellulose ether.
1. Ubuncane be-cellulose ether
Ubuncane be-cellulose ether buthinta ukuncibilika kwayo. Isibonelo, uma ubuncane be-cellulose ether buphansi, buncibilika ngokushesha emanzini kanye nokuthuthukiswa kokusebenza kokugcinwa kwamanzi. Ngakho-ke, ubuncane be-cellulose ether kufanele bufakwe njengenye yezimpawu zayo zocwaningo. Ngokuvamile, insalela yesihlungo sobuncane be-cellulose ether obudlula u-0.212mm akufanele idlule u-8.0%.
2. Izinga lokwehlisa isisindo lokomisa
Izinga lokulahlekelwa isisindo lokomisa libhekisela kumaphesenti esisindo sezinto ezilahlekile esisindo sesampula yokuqala lapho i-cellulose ether yomiswa ekushiseni okuthile. Ngekhwalithi ethile ye-cellulose ether, izinga lokulahlekelwa isisindo lokomisa liphezulu kakhulu, okuzonciphisa okuqukethwe kwezithako ezisebenzayo ku-cellulose ether, kuthinte umphumela wokusetshenziswa kwamabhizinisi angaphansi, futhi kwandise izindleko zokuthenga. Ngokuvamile, ukulahlekelwa isisindo lapho komiswa i-cellulose ether akudluli ku-6.0%.
3. Okuqukethwe komlotha we-sulfate we-cellulose ether
Ngekhwalithi ethile ye-cellulose ether, okuqukethwe komlotha kuphakeme kakhulu, okuzonciphisa okuqukethwe kwezithako ezisebenzayo ku-cellulose ether futhi kuthinte umphumela wokusetshenziswa kwamabhizinisi angaphansi komfula. Okuqukethwe komlotha we-sulfate kwe-cellulose ether kuyisilinganiso esibalulekile sokusebenza kwayo. Kuhlanganiswe nesimo samanje sokukhiqiza sabakhiqizi be-cellulose ether abakhona ezweni lami, ngokuvamile okuqukethwe komlotha kwe-MC, HPMC, HEMC akufanele kudlule u-2.5%, kanye nokuqukethwe komlotha kwe-HEC cellulose ether akufanele kudlule u-10.0%.
4. Ukuqina kwe-cellulose ether
Ukugcinwa kwamanzi kanye nomphumela wokuqina kwe-cellulose ether kuncike kakhulu ekuqineni kanye nomthamo we-cellulose ether uqobo ongezwe ku-slurry yesimende.
5. Inani le-pH le-cellulose ether
Ukuqina kwemikhiqizo ye-cellulose ether kuzoncipha kancane kancane ngemva kokugcinwa ekushiseni okuphezulu noma isikhathi eside, ikakhulukazi emikhiqizweni ene-viscosity ephezulu, ngakho-ke kuyadingeka ukunciphisa i-pH. Ngokuvamile, kuyalulekwa ukulawula ububanzi be-pH ye-cellulose ether bube ngu-5-9.
6. Ukuhanjiswa okulula kwe-cellulose ether
Ukuhanjiswa kokukhanya kwe-cellulose ether kuthinta ngqo umphumela wokusetshenziswa kwayo ezintweni zokwakha. Izici eziyinhloko ezithinta ukuhanjiswa kokukhanya kwe-cellulose ether yilezi: (1) ikhwalithi yezinto zokusetshenziswa; (2) umphumela we-alkaliization; (3) isilinganiso senqubo; (4) isilinganiso se-solvent; (5) umphumela we-neutralization.
Ngokusho komphumela wokusetshenziswa, ukuhanjiswa kokukhanya kwe-cellulose ether akufanele kube ngaphansi kuka-80%.
7. Izinga lokushisa lejeli le-cellulose ether
I-Cellulose ether isetshenziswa kakhulu njenge-viscosifier, i-plasticizer kanye ne-ejenti yokugcina amanzi emikhiqizweni yesamente, ngakho-ke i-viscosifier kanye nokushisa kwejeli kuyizinyathelo ezibalulekile zokubonisa ikhwalithi ye-cellulose ether. Izinga lokushisa lejeli lisetshenziselwa ukunquma uhlobo lwe-cellulose ether, oluhlobene nezinga lokufakwa esikhundleni kwe-cellulose ether. Ngaphezu kwalokho, usawoti kanye nokungcola nakho kungathinta izinga lokushisa lejeli. Lapho izinga lokushisa lesisombululo likhuphuka, i-cellulose polymer ilahlekelwa amanzi kancane kancane, futhi i-viscosity yesisombululo iyancipha. Lapho iphuzu lejeli lifinyelelwa, i-polymer iyaphela ngokuphelele futhi yakhe ijeli. Ngakho-ke, emikhiqizweni yesamente, izinga lokushisa livame ukulawulwa ngaphansi kwezinga lokushisa lokuqala lejeli. Ngaphansi kwalesi simo, lapho izinga lokushisa liphansi, i-viscosity iba phezulu, futhi umphumela wokujiya kanye nokugcinwa kwamanzi usobala kakhulu.
Isikhathi sokuthunyelwe: Feb-27-2023