Ekuqulunqweni kodaka olomileyo lomgubo,i-cellulose ethersisidibaniso esibalulekileyo esinexabiso eliphantsi lokongezwa ngokwentelekiso, kodwa linokuphucula kakhulu ukuxubana nokusebenza kolwakhiwo lodaka. Ukuyibeka ngokulula, phantse zonke iipropati zokuxuba ezimanzi zodaka ezinokubonwa ngeso lenyama zibonelelwa nge-cellulose ether. Yinto ephuma kwi-cellulose efunyenwe ngokusebenzisa i-cellulose evela kwiplanga kunye nekotoni, isabela nge-caustic soda, kwaye emva koko i-etherifying nge-ejenti etherifying.
Iindidi ze-cellulose ethers
A. IHydroxypropyl methyl cellulose (HPMC), eyenziwe ngokukodwa kwikotoni ecocekileyo ecocekileyo njengezinto eziluhlaza, i-etherified ngokukodwa phantsi kweemeko ze-alkaline.
B. IHydroxyethyl methylcellulose (HEMC), i-ether ye-cellulose engekho i-ionic, i-powder emhlophe ngembonakalo, ayinavumba kwaye ayinancasa.
C. Iselulosi yeHydroxyethyl (HEC), i-non-ionic surfactant, imhlophe ngenkangeleko, ayinavumba, ayinancasa kwaye ingumgubo oqukuqela lula.
Ezi zingentla ziyi-non-ionic cellulose ethers, kunye ne-ionic cellulose ethers (ezifana ne-carboxymethyl cellulose CMC).
Ngexesha lokusetyenziswa kodaka lomgubo owomileyo, ngenxa yokuba i-ionic cellulose (i-CMC) ayizinzile phambi kwe-calcium ion, ayifane isetyenziswe kwiinkqubo ze-inorganic gelling kunye nesamente kunye ne-slaked lime njengezinto zokufaka isamente. Kwezinye iindawo e-China, Ezinye iiputi zodonga lwangaphakathi zicutshungulwe ngestatshi esilungisiweyo njengesona sixhobo siphambili sesamente kunye ne-Shuangfei powder njengesizalisi sisebenzisa i-CMC njenge-thickener. Nangona kunjalo, ngenxa yokuba le mveliso ixhomekeke kwi-mildew kwaye ayimelani namanzi, iyancipha ngokuthe ngcembe yimarike. Okwangoku, i-ether cellulose esetyenziswa kakhulu e-China yi-HPMC.
I-Cellulose ether isetyenziswa kakhulu njengearhente yokugcina amanzi kunye ne-thickener kwimathiriyeli esekwe kwisamente.
Umsebenzi wayo wokugcinwa kwamanzi unokuthintela i-substrate ekuthatheni amanzi amaninzi kwaye ithintele ukukhuphuka kwamanzi, ukwenzela ukuba kuqinisekiswe ukuba i-samente inamanzi aneleyo xa i-hydrated. Thatha umsebenzi wokutyabeka njengomzekelo. Xa udaka lwesamente oluqhelekileyo lusetyenziswa kumgangatho wesiseko, i-substrate eyomileyo kunye ne-porous iya kutsala ngokukhawuleza isixa esikhulu samanzi ukusuka kwi-slurry, kwaye umaleko we-cement slurry kufutshane nomgangatho wesiseko uya kuphulukana lula namanzi afunekayo kwi-hydration. , ngoko ke ayikwazi kuphela ukwenza ijeli yesamente ngamandla okudibanisa kumphezulu we-substrate, kodwa iphinda ithande ukulwa kunye ne-seapage yamanzi, ukwenzela ukuba umgangatho we-cement slurry ulula ukuwa. Xa i-grout esetyenzisiweyo incinci, kulula kwakhona ukwenza iintanda kwi-grout yonke. Ngoko ke, kwixesha elidlulileyo lokutyabeka komhlaba, amanzi ahlala esetyenziselwa ukumanzisa i-substrate kuqala, kodwa lo msebenzi awukho nje umsebenzi onzima kwaye uchitha ixesha, kodwa nomgangatho wokusebenza kunzima ukulawula.
Ngokuqhelekileyo, ukugcinwa kwamanzi kwi-sement slurry kwanda ngokunyuka komxholo we-cellulose ether. Inkulu i-viscosity ye-ether ye-cellulose eyongeziweyo, ngcono ukugcinwa kwamanzi.
Ukongeza ekugcinweni kwamanzi kunye nokuqina, i-cellulose ether ichaphazela nezinye iimpawu zodaka lwesamente, ezifana nokunciphisa, ukungenisa umoya, kunye nokwandisa amandla ebhondi. I-ether ye-cellulose inciphisa ukusetwa kunye nenkqubo yokuqina kwesamente, ngaloo ndlela yandisa ixesha lokusebenza. Ke ngoko, ngamanye amaxesha isetyenziswa njenge-coagulant.
Ngokuphuhliswa kodaka oluxutyiweyo olomileyo,i-cellulose etheriye yaba ngumxube obalulekileyo wodaka lwesamente. Nangona kunjalo, zininzi iintlobo kunye neenkcukacha ze-cellulose ether, kwaye umgangatho phakathi kweebhetshi usaguquguquka.
Ixesha lokuposa: Apr-25-2024