Ekubunjweni kwe-powder mortar eyomileyo, i-methyl cellulose yimali eyongezelelweyo ephantsi, kodwa inesongezo esibalulekileyo esinokuphucula kakhulu ukuxuba kunye nokwakhiwa kodaka. 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 ifake i-etherifying agent etherifying.
Iintlobo zeMethyl Cellulose Ether
A. IHydroxypropyl methylcellulose (HPMC) yenziwe ikakhulu ngomqhaphu osulungekisiweyo kakhulu njengemathiriyeli ekrwada, efakwa i-etherified ngokukodwa phantsi kweemeko zealkaline.
B. I-Hydroxyethyl methyl cellulose (HEMC), i-ether ye-cellulose engeyona i-ionic, i-powder emhlophe, engenavumba kwaye ayinambitheki.
C. IHydroxyethylcellulose (HEC) yi-non-ionic surfactant, imhlophe ngenkangeleko, ayinavumba kwaye ayinancasa kwaye ingumgubo ohamba 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 eTshayina, ezinye iipuphu zodonga lwangaphakathi zicutshungulwe ngestatshi esilungisiweyo njengesona sixhobo siphambili sesamente kunye nomgubo weShuangfei njengesizalisi sisebenzisa i-CMC njengento etyebisayo, kodwa ngenxa yokuba le mveliso ithanda ukungunda kwaye ayinyangeki ngamanzi, iyacinywa ngokuthe ngcembe. ngemarike . Okwangoku, i-ether cellulose esetyenziswa kakhulu e-China yi-HPMC.
I-ether ye-cellulose isetyenziswa kakhulu njenge-arhente yokugcina amanzi kunye ne-thickener kwizinto ezisekelwe kwisamente.
Umsebenzi wayo wokugcinwa kwamanzi unokuthintela i-substrate ekuthatheni amanzi amaninzi ngokukhawuleza kwaye ithintele ukukhuphuka kwamanzi, ukwenzela ukuba kuqinisekiswe ukuba i-samente inamanzi aneleyo xa i-hydrated. Thatha umsebenzi wokutyabeka njengomzekelo. Xa udaka lwesamente oluqhelekileyo lusetyenziswa kumphezulu we-substrate, i-substrate eyomileyo kunye ne-porous iya kuthabatha ngokukhawuleza isixa esikhulu samanzi ukusuka kwi-slurry, kwaye i-samente slurry layer kufuphi ne-substrate iya kulahlekelwa lula yi-hydration yayo. Ngoko ke, kungekhona nje kuphela ukwenza ijeli ye-samente enamandla okubambelela kumphezulu we-substrate, kodwa kwakhona kubangele i-warping kunye ne-seapage yamanzi, ukwenzela ukuba i-sement slurry layer ilula ukuwa. Xa i-grout esetyenzisiweyo incinci, kulula kwakhona ukwenza iintanda kwi-grout yonke. Ke ngoko, kwixesha elidlulileyo lokutyatyekwa komphezulu, izinto ezisisiseko zazidla ngokumanziswa ngamanzi kuqala, kodwa lo msebenzi wawunomsebenzi omkhulu kwaye udla ixesha, kwaye umgangatho wokusebenza kwakunzima ukuwulawula.
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 ukuseta kunye nenkqubo yokuqina kwe-samente, ngaloo ndlela yandisa ixesha lokusebenza, ngoko ngamanye amaxesha isetyenziswe njengomlawuli omiselweyo.
Ngokuphuhliswa kodaka oluxutyiweyo, i-cellulose ether iye yaba yinto ebalulekileyo yodaka lwesamente. Nangona kunjalo, zininzi iintlobo kunye neenkcukacha ze-cellulose ether, kwaye umgangatho phakathi kweebhetshi usaguquguquka.
Kwakhona kufuneka ubeke ingqalelo xa usebenzisa:
1. Iimpawu zokusebenza zodaka olulungisiweyo zihambelana ngokusondeleyo nophuhliso lwe-viscosity ye-cellulose ether. Nangona iimveliso ezine-viscosity ephezulu zine-viscosity yokugqibela, ngenxa yokuchithwa okucothayo, kuthatha ixesha elide ukufumana i-viscosity yokugqibela; ukongeza, I-ether cellulose enamasuntswana arhabaxa ithatha ixesha elide ukufumana i-viscosity yokugqibela, ngoko ke imveliso ene-viscosity ephezulu ayifuni ukuba neempawu ezingcono zokusebenza.
2. Ngenxa yokuncitshiswa kweqondo lepolymerization ye-cellulose ether izinto eziluhlaza, i-viscosity ephezulu ye-cellulose ether nayo ilinganiselwe.
3. Kuyimfuneko ukujonga ukuthengwa, inkqubo yokuvelisa kunye nokuhlolwa kwefektri ukuphepha ukuguquguquka komgangatho.
Ixesha lokuposa: Mar-29-2023