Ukusetshenziswa kwe-Cellulose Ether

Ekwakheni udaka lwempuphu eyomile,i-cellulose etheriyisengezo esibalulekile esinenani lesengezo eliphansi uma kuqhathaniswa, kodwa lingathuthukisa kakhulu ukuxuba nokusebenza kokwakhiwa kodaka. Ukukubeka kalula, cishe zonke izakhiwo ezimanzi zokuxuba zodaka ezingabonakala ngeso lenyama zinikezwa i-cellulose ether. Iphuma ku-cellulose etholwe kusetshenziswa i-cellulose evela kukhuni nokotini, isabela nge-caustic soda, bese i-etherifying nge-ejenti etherifying.

Izinhlobo ze-cellulose ethers

A. IHydroxypropyl methyl cellulose (HPMC), eyenziwe ngokuyinhloko ngekotini elicwengekile eliphezulu njengempahla eluhlaza, i-etherified ngokukhethekile ngaphansi kwezimo ze-alkali.
B. I-Hydroxyethyl methylcellulose (HEMC), i-non-ionic cellulose ether, iyimpushana emhlophe ngokubukeka, ayinaphunga futhi ayinambitheki.
C. I-Hydroxyethyl cellulose (HEC), i-surfactant engeyona i-ionic, emhlophe ngokubukeka, engenaphunga, ayinambitheki futhi impushana egeleza kalula.

Okungenhla ama-non-ionic cellulose ethers, nama-ionic cellulose ethers (njenge-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 esilungisiwe njengento eyinhloko yokufaka usimende kanye ne-Shuangfei powder njengesigcwalisi sisebenzisa i-CMC njengesishuqululi. Kodwa-ke, ngenxa yokuthi lo mkhiqizo ujwayele ukubola futhi awumelani namanzi, kancane kancane uqedwa yimakethe. Njengamanje, i-cellulose ether esetshenziswa kakhulu e-China yi-HPMC.

I-Cellulose ether isetshenziswa kakhulu njenge-ejenti yokugcina amanzi kanye ne-thickener ezintweni ezisekelwe kusimende.

Umsebenzi wayo wokugcina amanzi ungavimbela i-substrate ekumunceni amanzi amaningi futhi ivimbele ukuhwamuka kwamanzi, ukuze kuqinisekiswe ukuthi usimende unamanzi anele uma ufakwe amanzi. Thatha umsebenzi wokuplasta njengesibonelo. Lapho i-slurry ye-cement evamile isetshenziswa endaweni engaphansi, i-substrate eyomile ne-porous izomunca ngokushesha inani elikhulu lamanzi kusuka ku-slurry, futhi ungqimba lwe-cement slurry oluseduze ne-base layer luzolahlekelwa kalula amanzi adingekayo ukuze kufakwe amanzi. , ngakho-ke akukwazi nje ukwakha ijeli ye-cement enamandla okubopha phezu kwe-substrate, kodwa futhi ijwayele ukugoqa kanye ne-seapage yamanzi, ukuze ungqimba lwe-cement slurry lube lula ukuwa. Uma i-grout esetshenzisiwe incane, kulula futhi ukwakha imifantu kuyo yonke i-grout. Ngakho-ke, esikhathini esidlule ukusebenza kokukhonkoloza, amanzi ngokuvamile asetshenziselwa ukumanzisa i-substrate kuqala, kodwa lokhu kusebenza akukona nje kuphela umsebenzi onzima futhi odla isikhathi, kodwa futhi ikhwalithi yokusebenza kunzima ukuyilawula.

Ngokuvamile, ukugcinwa kwamanzi kodaka lukasimende kukhuphuka ngokwanda kokuqukethwe kwe-cellulose ether. Uma kukhulu i-viscosity ye-cellulose ether eyengeziwe, ukugcinwa kwamanzi kungcono.

Ngaphezu kokugcina amanzi kanye nokuqina, i-cellulose ether iphinda ithinte ezinye izakhiwo zikasimende, njengokuhlehlisa, ukufaka umoya, nokwandisa amandla ebhondi. I-cellulose ether ibambezela ukumiswa kanye nenqubo yokuqina kukasimende, ngaleyo ndlela andise isikhathi sokusebenza. Ngakho-ke, ngezinye izikhathi isetshenziswa njenge-coagulant.

Ngokuthuthukiswa kodaka oluxutshwe okomile,i-cellulose etherisibe yingxubevange yodaka lukasimende ebalulekile. Kodwa-ke, kunezinhlobo eziningi kanye nokucaciswa kwe-cellulose ether, futhi ikhwalithi phakathi kwamaqoqo isalokhu iguquguquka.