I-Tile Adhesive ingenye yezicelo ezinkulu kakhulu zodaka olukhethekile oluhlanganisiwe njengamanje. Lolu uhlobo lwesimende njengezinto eziphambili ze-cementionate futhi ezingezelwe ngama-abgregates, ama-ejenti okugcina amanzi, ama-ejenti wamandla okuqala, i-latex powder kanye nezinye izengezo eziphilayo noma ezi-inforganic. ingxube. Ngokuvamile, kudinga kuphela ukuhlanganiswa namanzi lapho kusetshenziswa. Uma kuqhathaniswa nosimende ojwayelekile kasimende, kungathuthukisa kakhulu amandla abugqilayo phakathi kokuqukethwe okubhekene nento ebhekene ne-substrate, inokuphikiswa okuhle kwamasheya futhi inokumelana namanzi amahle kakhulu nokuphikiswa kokushisa. Kanye nezinzuzo zokuphikiswa komjikelezo we-freeze-thaw, okusetshenziselwa ukunamathisela amathayela angaphakathi nangaphandle, amathayela aphansi nezinye izinto zokuhlobisa, okwamanje, njengamakhishi wokuhlobisa ama-cele asetshenziswa kakhulu.
Imvamisa lapho sikwahlulela ukusebenza kwe-tile anamathela, asinakunaka kuphela ukusebenza kwaso okusebenzayo kanye nekhono lokulwa nokulwa, kepha nalondela amandla alo okuvulwa kanye nesikhathi sokuvula. I-Cellulose Ether in Tile Adhesive ayithintanga kuphela izakhiwo ze-Rheological of Porcelain adhesive, njengokusebenza okubushelelezi, ukunamathela kommese, kepha futhi kunethonya elinamandla ezizakhisweni zemishini ze-tile anamathela. Ithonya ngesikhathi sokuvula seTile Adhesive
Lapho i-rubber powder kanye ne-cellulose ether co-ekhona ngodaka olumanzi, idatha ethile ikhombisa ukuthi i-ruble powder inamandla okunamathisela imikhiqizo ye-celtetic hydration, futhi i-cellulose ether ikhona ngaphezulu ku-interstitial fluid, okuthinta ukubonwa okuthe xaxa nokusetha isikhathi. Ukungezwani komhlaba kwe-cellulose ether kuphakeme kunalokho kwe-awder yenjoloba, kanye nokucebisa okwengeziwe kwe-cellulose ether esibonakalayo somuntu ozosizakala ekwakhekeni kwama-hydrogen bond phakathi kwendawo eyisisekelo kanye ne-cellulose ether.
Ku-datar omanzi, amanzi asosimende athuthumela, kanti ama-cellulose ether ayacekelwa phansi ebusweni, futhi ifilimu lizokwakhiwa ebusweni bodaka ngaphansi kweminyaka emi-5, kanti amafilimu asuswa engxenyeni engaphansi kodaka, futhi amafilimu asuswa ekuqaleni, futhi ukufuduka kwamanzi kuzoletha okuningi ukucebisa isendlalelo endaweni yodaka.
Ngakho-ke, ukwakheka kwefilimu kwe-cellulose ether ngaphezulu kodaka kunethonya elikhulu ekusebenzeni kodaka.
1) Ifilimu elakhiwe lincane kakhulu futhi lizoncibilika kabili, alikwazi ukuncibilika ukuhwamuka kwamanzi futhi linciphise amandla.
2) Ifilimu elakhiwe likhulu kakhulu, ukugcwala kwe-cellulose ether ku-motarast arstitial ketshezi kuphezulu, futhi ukubukeka kuphakeme, ngakho-ke akulula ukwephula ifilimu engaphezulu lapho amathayili enamathiselwe.
Kungabonakala ukuthi izakhiwo ezakha amafilimu ze-cellulose ether zinomthelela omkhulu esikhathini esivulekile. Uhlobo lwe-cellulose ether (HPMC, i-hemc, i-MC, njll.) Futhi izinga lokuthezeka (ukufakwa esikhundleni) lithinta ngqo izakhiwo ezenziwayo ze-cellulose ether, kanye nobulukhuni befilimu.
Ngaphezu kokudlulisela izakhiwo ezizuzisayo ezichazwe ngenhla ezizuzayo kudaka, i-cellulose ether ibuye ibambezelele ama-hydration kinetics kasimende. Lo mphumela wokubuyisa ubuchwepheshe ikakhulukazi ngenxa ye-adsorption yama-molecule e-cellulose ether ngezigaba ezinamaminerali ohlelweni lwamakhonkolo egcwele ama-hydrate, kodwa ngokuvamile, ukuvumela ama-cellulose ether molecule ikakhulukazi kumanzi anjenge-CSH ne-calcium hydroxide. Emikhiqizweni yamakhemikhali, akuvamile ukuthi akhishwe esigabeni sokuqala samaminerali se-Clinker. Ngaphezu kwalokho, i-cellulose ether inciphisa ukuhamba kwama-ion (CA2 +, SE42-, ...) Esisombululo se-pore ngenxa yokwanda kokubonakala kwesisombululo se-pore, ngaleyo ndlela kubambezele inqubo ye-hydration.
I-Viscosity enye ipharamitha ebalulekile, emele izici zamakhemikhali ze-cellulose ether. Njengoba kushiwo ngenhla, i-viscosity ikakhulukazi ithinta kakhulu umthamo wokugcina amanzi futhi inomthelela omkhulu ekusebenzeni kodaka olusha. Kodwa-ke, izifundo zokuhlola zithole ukuthi i-viscosity ye-cellulose ether icishe ibe nomthelela kuma-kinetics we-cent hyddration. Isisindo se-molecular sinomthelela omncane ku-hydration, kanye nomehluko omkhulu phakathi kwezinsimbi ezihlukile zamangqamuzana angama-10min kuphela. Ngakho-ke, isisindo se-molecular akuyona ipharamitha esemqoka yokulawula i-cydration cent hydration.
"Ukusetshenziswa kwe-cellulose ether emikhiqizweni yodaka eyomile esuselwe omile" kuvezwe ukuthi ukubuyiselwa kwe-cellulose ether kuya ngesakhiwo sayo samakhemikhali. Futhi ukuthambekela okujwayelekile kuphelile ukuthi nge-MHEC, kukhuphuka izinga le-methylation, elincane umphumela wokugcina kabusha we-cellulose ether. Ngaphezu kwalokho, umphumela wokubuyisa kabusha we-hydrophilic (enjengokufaka esikhundleni se-HEC) unamandla kunaleso sokufakwa esikhundleni se-hydrophobic (njengokufaka esikhundleni se-MH, Mhec, MHPC). Umphumela wokubuyisa we-cellulose ether uthinteka ikakhulukazi ngamapharamitha amabili, uhlobo kanye nenani lamaqembu angenalutho.
Ukuhlolwa kwesistimu kubuye kwathola ukuthi okuqukethwe okutholwe kufakazela kudlala indima ebalulekile emandleni okusebenza ama-tile anamathela. Ku-HPMC, kudingeka ukuhlinzekwa ngezinga elithile ukuze kuqinisekiswe ukuthi i-solubity yayo yamanzi kanye nokushintsha okukhanyayo. Okuqukethwe kokunye okufakiwe kubuye kunqume amandla we-HPMC. Ukushisa kwe-gel kubuye kunqume indawo yokusebenzisa ye-HPMC. Ngaphakathi kwebanga elithile, ukwanda kokuqukethwe kwamaqembu we-methoxyl kuzoletha umkhuba ongezansi emandleni okukhipha, ngenkathi ukwanda kokuqukethwe kwamaqembu ama-hydroxypropoxyls kuzoholela ekunciphiseni amandla okukhipha. inkambiso ekhuphukayo. Kunomphumela ofanayo wamahora wokuvula.
Umkhuba wokushintsha wamandla emishini ngaphansi kwesimo sesikhathi esivulekile uyahambisana nalokho ngaphansi kwezimo zokushisa ezijwayelekile. I-HPMC enokuqukethwe okuphezulu kwe-methoxyl (DS) kanye nokuqukethwe okuphansi kwe-hydroxypropoxyl (MS) kunokubumba okuhle kwefilimu, kepha kuzothinta udaka olumanzi kunalokho. Izakhiwo ezimanzi ezibonakalayo.
Isikhathi sePosi: Feb-14-2025