Ama-cellulose ethers avame ukusetshenziswa njengezithasiselo ezintweni zokwakha ngenxa yekhono labo lokuguqula izakhiwo ze-rheological kanye nemishini yezinto ezibonakalayo.Ikakhulukazi, zivame ukufakwa ku-gypsum mortars ukuze kuthuthukiswe uketshezi, ukusebenza kahle nokunamathela.Kodwa-ke, umphumela othize we-cellulose ether viscosity ekusebenzeni kwe-gypsum mortar awukakacaciswa.Leli phepha libuyekeza izincwadi ezikhona ngalesi sihloko futhi lixoxa ngomthelela ongaba khona we-cellulose ether viscosity ezindaweni ze-gypsum mortars.
Ama-cellulose ether ama-polymers ancibilika emanzini atholakala ku-cellulose, i-polymer yemvelo etholakala ezindongeni zamaseli ezitshalo.Zivame ukusetshenziswa njengama-thickeners, ama-binders kanye nama-stabilizers ezinhlobonhlobo zezicelo zezimboni ezihlanganisa ukudla, izimonyo, imithi kanye nezinto zokwakha.Ekwakhiweni, zivame ukufakwa odakeni ukuze kuthuthukiswe ukusebenza, ukunamathela nokuqina.
I-Gypsum iyiminerali yemvelo eyakhiwe nge-calcium sulfate dihydrate.Isetshenziswa kabanzi ekwakhiweni kwezakhiwo zayo ezikwazi ukumelana nomlilo kanye nezakhiwo zokuvikela umsindo nezokushisa.I-Gypsum mortar ivame ukusetshenziswa njenge-primer yezindonga ze-stucco nophahla, kanye nomsebenzi wokuqedela wokwakhiwa kwe-drywall.
Lapho i-cellulose ether yengezwa ku-gypsum mortar, ingashintsha izakhiwo ze-rheological zengxube.I-Rheology iwucwaningo lokuguqulwa nokugeleza kwezinto ezingaphansi kwengcindezi.Ukuziphatha kokugeleza kwe-gypsum mortar kungabonakala nge-viscosity yayo, okuyisilinganiso sokumelana kwayo nokugeleza.I-viscosity yodaka ithonywa izici ezimbalwa, okuhlanganisa uhlobo nokugxilwa kwe-cellulose ether, usayizi wezinhlayiyana nokusabalalisa kwegypsum, kanye nesilinganiso samanzi kusimende.
I-viscosity cellulose ethers ephakeme kakhulu ijwayele ukuba nomthelela omkhulu ekuziphatheni kokugeleza kwe-gypsum mortar kunama-ether e-viscosity aphansi.Isibonelo, ucwaningo luye lwabonisa ukuthi ukwengeza i-high-viscosity hydroxypropylmethylcellulose (HPMC) ku-gypsum mortar kungakhuphula i-viscosity yengxube futhi kuthuthukise ukusebenza kwayo, kuyilapho i-HPMC ye-viscosity ephansi inomthelela omncane ekuziphatheni kokugeleza kodaka.Lokhu kubonisa ukuthi ukusebenza kwe-gypsum mortar kuncike ohlotsheni oluthile kanye ne-viscosity ye-cellulose ether esetshenzisiwe.
Enye yezinzuzo eziyinhloko zokufaka i-cellulose ether ku-gypsum mortar ukuthi ithuthukisa ukusebenza kwengxube.Ukucutshungulwa kuchaza indlela into engaxutshwa ngayo, ibekwe futhi ihlanganiswe kalula ngayo.I-gypsum mortars esebenza kahle kakhulu ingasetshenziswa ezindaweni ezingaphezulu kalula, okuholela ekuqedeni okubushelelezi, okufanayo.Ama-cellulose ether angathuthukisa ukusebenza kwengxube ngokunciphisa izehlakalo zokuhlukaniswa nokopha, okwenzeka lapho izinhlayiya ezisindayo odakeni ziphuma ekuxubeni phakathi nokwakhiwa.
Ngaphezu kokuthinta ukusebenza kahle, i-viscosity ye-cellulose ether izophinde ithinte ukusebenza kokunamathela kwe-gypsum mortar.I-Adhesion ikhono lempahla ukubopha kwenye indawo.Ukuba khona kwe-cellulose ether ku-gypsum mortar kungathuthukisa ukunamathela kwayo ezindaweni ezingaphezulu ngokwandisa indawo yokuxhumana nokunciphisa inani lomoya ovaleleke phakathi kwezindawo.I-high-viscosity cellulose ethers isebenza kakhulu kune-low-viscosity ether ekuthuthukiseni ukunamathela ngoba akha isibopho esiqinile phakathi kwezindawo.
Enye impahla ebalulekile ye-gypsum mortar isikhathi sayo sokumisa, isikhathi esithathayo ukuze ingxube iqine futhi ithuthukise amandla.Isikhathi sokusetha se-gypsum mortar singashintshwa ngokungeza i-cellulose ether, engathinta inqubo ye-hydration yezinhlayiya ze-gypsum.I-hydration ukusabela kwamakhemikhali okwenzeka lapho amanzi engezwa ku-gypsum, okuholela ekwakhekeni kwamakristalu e-calcium sulfate dihydrate.
I-viscosity ye-cellulose ether inomthelela omkhulu ekusebenzeni kwe-gypsum mortar.I-viscosity cellulose ethers ephezulu ingathuthukisa ukucutshungulwa, izakhiwo zokunamathela kanye nesikhathi sokumisa sengxube, kuyilapho ama-ether e-viscosity ephansi angase abe nomthelela omncane kulezi zakhiwo.Umthelela othize we-cellulose ether viscosity uncike ezintweni eziningi, okuhlanganisa uhlobo nokugxila kwe-ether, usayizi wezinhlayiyana nokusabalalisa kwegypsum, kanye nesilinganiso samanzi kusimende.Ucwaningo olwengeziwe luyadingeka ukuze uqonde ngokugcwele ubudlelwano phakathi kwe-cellulose ether viscosity kanye nezakhiwo ze-gypsum mortar, kodwa izincwadi ezitholakalayo zibonisa ukuthi lokhu kuyisici esibalulekile okufanele sicatshangelwe lapho kwakhiwa izinto zokwakha.
Isikhathi sokuthumela: Aug-15-2023