Ekwakhiweni kodaka owomile lwempuphu, i-cellulose ether yisengezo esibalulekile ngenani eliphansi kakhulu, kepha lingathuthukisa kakhulu ukusebenza kokuxuba nokwakha kodaka. Ukubeka nje, cishe zonke izakhiwo ezimanzi zokuxuba zodaka ezingabonakala ngeso elinqunu zinikezwa yi-cellulose ether. Kuyinto etholwa yi-cellulose etholwe ngokusebenzisa iselula kusuka ngokhuni nakotini, ukuphendula nge-caustic soda, bese uzenzisa nge-ejenti etherati.
Izinhlobo ze-cellulose afers
A. I-Hydroxypropyllylylylylylylyllose (HPMC), eyenziwe ikakhulukazi ekotini elicwengekileyo elicwengekile njengento eluhlaza, ifakwe ngokukhethekile ngaphansi kwezimo ze-alkali.
B. HydroxyYylyl Methylcellulose (Hemc), i-ether engekho emthethweni, i-powder emhlophe ngokubukeka, ngaphandle kwephunga futhi ayinambitha.
C. I-HyrdroxYethyl Cellulose (HEC), i-survic engekho emthethweni, emhlophe ngokubukeka, okungenamqondo, okungenamkhawulo futhi i-powder egeleza kalula.
Lokhu okungenhla akunampi e-Inon-Iollule Talvu
Ngesikhathi sokusebenzisa udaka lwe-powder eyomile, ngoba ionic cellulose (CMC) ingazinzile phambi kwe-calcium ion, akuvamisile ukusetshenziswa ezinhlelweni ze-inorganic gelling nge usimende kanye nomoya ovuthayo njengezinto zokwehla. Kwezinye izindawo eChina, ezinye izinto zodonga zangaphakathi zicutshungulwa ngesitashi esiguquliwe njengezinto eziphambili zokubhala kanye ne-shuangfei powder njengoba i-filler isebenzisa i-CMC njengoMkhulu. Kodwa-ke, ngoba lo mkhiqizo uthambekele ekukhuthaleni futhi akamelani namanzi, kancane kancane aqedwa yimakethe. Njengamanje, i-cellulose ether esetshenziswa kakhulu eChina yi-HPMC.
I-Celsulose Ether isetshenziswa ikakhulukazi njenge-ejenti yokugcinwa kwamanzi kanye nokuqina kwezinto zokwenziwa kosimende
Umsebenzi wayo wokugcina amanzi ungavimba i-substrate ukuthi ingangeni emanzini amaningi futhi ivimbezele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi usimende une-hydrate anele lapho kunama-hydrate. Thatha umsebenzi wokufaka isibonelo. Lapho kufakwa i-slurry evamile yosezingeni eliphansi, i-substrate eyomile ne-porous izodonsa ngokushesha inani elikhulu lamanzi kusuka ku-slurry, kanye noseva elisezingeni eliphezulu eliseduze nesendlalelo esiseduze kwe-hydration. , ngakho-ke akugcini nje kuphela ukuthi akwazi ukwakha ijeli yesimende enamandla abopha ebusweni be-substrate, kepha futhi kuthambekele ekuhlaseleni nasendaweni yokuvula amanzi, ukuze i-cement cement slurry ulula. Lapho i-grout isetshenziswa inciphile, kulula futhi ukwakha imifantu kuyo yonke i-grout. Ngakho-ke, ekusebenzeni kokuphamba kwangaphambilini kwangaphambilini, amanzi avame ukusetshenziselwa ukumanzisa i-substrate kuqala, kepha lo msebenzi awugcini nje ngokudla okusebenzayo futhi okudla isikhathi, kodwa futhi nekhwalithi yokusebenza kunzima ukuyilawula.
Ngokuvamile ukukhuluma, ukugcinwa kwamanzi kwesikhumba sikasimende kukhuphuka ngokukhuphuka kokuqukethwe kwe-cellulose ether. Lapho kukhula i-viscosity ye-ether ye-cellulose eyengeziwe, okungcono kokugcinwa kwamanzi.
Ngaphezu kokugcinwa kwamanzi kanye nokuqina, i-ether ye-cellulose futhi ithinta nezinye izakhiwo zikasimende kasimende, njengokubuyisa, umoya ongenisa umoya kanye nokwenza amandla e-bond. I-CelluleOse Ether yehlisa ukumiswa kwenqubo nokuqina kwenqubo kasimende, ngakho-ke kuqhubeka isikhathi sokusebenza. Ngakho-ke, kwesinye isikhathi kusetshenziswa njenge-coabulayo.
Ngokuthuthukiswa kodaka oluhlanganisiwe omile, i-cellulose ether iba yinto ebalulekile yokuphikiswa kodaka. Kodwa-ke, kunezinhlobonhlobo eziningi kanye nokucaciswa kwe-cellulose ether, futhi ikhwalithi phakathi kwamabhethri isashintshashintsha.
Isikhathi sePosi: FEB-08-2023