Izinhlobo ze-Methyl Cellulose Ether
A. IHydroxypropyl methylcellulose (HPMC) yenziwe ikakhulukazi ukotini ocwenge kakhulu ocwengekile njengempahla eluhlaza, efakwa etherified ngokukhethekile ngaphansi kwezimo ze-alkali.
B. I-Hydroxyethyl methyl cellulose (HEMC), i-non-ionic cellulose ether, iyimpushana emhlophe, ayinaphunga futhi ayinambitheki.
C. IHydroxyethylcellulose (HEC) iyi-surfactant engeyona i-ionic, imhlophe ngokubukeka, ayinaphunga futhi ayinambitheki futhi impushana egeleza kalula.
Okungenhla ama-non-ionic cellulose ethers, nama-ionic cellulose ethers (afana ne-carboxymethyl cellulose (CMC)).
Ngesikhathi sokusetshenziswa kwe-powder mortar eyomile, ngenxa yokuthi i-ionic cellulose (CMC) ayizinzile lapho kukhona ama-calcium ions, ayivamile ukusetshenziswa ezinhlelweni ze-inorganic gelling ezinosimende kanye ne-slaked lime njengezinto zokuhlanganisa. Kwezinye izindawo e-China, Amanye ama-putty angaphakathi odongeni acutshungulwa ngesitashi esishintshiwe njengesisetshenziswa esiyinhloko sikasimende kanye ne-Shuangfei powder njengesithako sokugcwalisa sisebenzisa i-CMC njengokuqina, kodwa ngenxa yokuthi lo mkhiqizo uthambekele ekubeni nesikhutha futhi awukwazi ukumelana namanzi, uyasuswa kancane kancane. ngasemakethe .
Njengamanje, ama-cellulose ether asetshenziswa kakhulu emikhiqizweni yodaka oluxutshwe okomile abizwa nangokuthi i-hydroxypropyl methylcellulose ether (HPMC) kanye ne-hydroxyethyl methylcellulose ether (HEMC). Ngemikhiqizo enokusetshenziswa okuhlukile, umthamo we-cellulose ether nawo uhlukile, uphansi njengo-0.02% njengodaka odongeni ukuya ku-0.1%. Njengodaka lokuplasta, oluphezulu lungasuka ku-0.3% luye ku-0.7% olufana nokunamathelisa amathayili.
Izakhiwo ze-Cellulose Ether
❶ I-Cellulose ether inokugcinwa kwamanzi okuhle kakhulu odakeni. Umsebenzi wayo wokugcina amanzi ungavimbela i-substrate ekumunceni amanzi amaningi ngokushesha kakhulu futhi ivimbele ukuhwamuka kwamanzi, ukuze kuqinisekiswe amanzi anele lapho usimende ugcwele amanzi. Ingakwazi ukuvimbela ngokuphumelelayo udaka ekumisweni nasekuqhekekeni ngenxa yokulahlekelwa kwamanzi ngokushesha, ukuze udaka lube nesikhathi eside sokwakha.
Ngokuvamile, ukugcinwa kwamanzi kodaka lukasimende kukhuphuka ngokwanda kokuqukethwe kwe-cellulose ether. Uma kukhulu i-viscosity ye-cellulose ether eyengeziwe, ukugcinwa kwamanzi kungcono.
❷ Umthelela wokujiya we-cellulose ether ungalawula udaka ukuze ufinyelele ukuvumelana okungcono kakhulu, uthuthukise ukuhlangana kodaka, uzuze umphumela wokulwa nokucwila, uthuthukise ukusebenza, futhi ukhuphule kakhulu ukusebenza kahle kokwakhiwa.
❸ I-cellulose ether ingathuthukisa ngokuphawulekayo i-viscosity emanzi yodaka olumanzi, iqinisekise ukuthi udaka olumanzi lunomphumela omuhle wokubopha kuma-substrate ahlukahlukene.
❹ I-Cellulose ether ithuthukisa ngokuphawulekayo amandla ebhondi odaka, futhi ingaqinisekisa isikhathi esanele samanzi sokufaka usimende ngokugcwele ngisho nasendaweni yokushisa ephezulu, ngaleyo ndlela kuqinisekiswe ukuboleka okungcono kodaka.
Inkambu yokusetshenziswa kwe-cellulose ether
Okusekelwe kusimende:
⑴, i-putty, ⑵, udaka olukhonkolo, ⑶, udaka olungangeni manzi, ⑷, i-caulking, ⑸, udaka olukhonkolo, ⑹, udaka lokufutha, ⑺, udaka lokuhlobisa, ⑻, i-tile enamathelayo, ⑼, usimende ozilinganisa ngokwakho, ⑽ ⑾, udaka lwamatshe, ⑿, udaka lokulungisa, ⒀, i-thermal insulation slurry, ⒁, i-EIFS thermal insulation bonding mortar, ⒂, into engancibiliki.
Ezinye izinto zokwakha:
⑴, udaka olungangeni manzi, ⑵, udaka lwezingxenye ezimbili.
Ngokuthuthukiswa kodaka oluxutshwe okomile, i-cellulose ether isibe ingxube ebalulekile yodaka lukasimende. Kodwa-ke, kunezinhlobo eziningi kanye nokucaciswa kwe-cellulose ether, futhi ikhwalithi phakathi kwamaqoqo isalokhu iguquguquka. Lapho uyisebenzisa, udinga ukunaka:
1. Izici zokusebenza zodaka oluguquliwe zihlobene eduze nokuthuthukiswa kwe-viscosity ye-cellulose ether. Nakuba imikhiqizo ene-viscosity ephezulu ene-viscosity yokugcina ephezulu, ngenxa yokuqedwa kancane, kuthatha isikhathi eside ukuthola i-viscosity yokugcina; ngaphezu kwalokho, I-cellulose ether enezinhlayiya eziqinile ithatha isikhathi eside ukuze ithole i-viscosity yokugcina, ngakho umkhiqizo one-viscosity ephakeme awunazo izici zokusebenza ezingcono.
2. Ngenxa yomkhawulo wezinga le-polymerization yezinto zokusetshenziswa kwe-cellulose ether, i-viscosity ephezulu ye-cellulose ether nayo inomkhawulo.
Isikhathi sokuthumela: Feb-02-2023