1 Isingeniso
I-adhesive-based tile adhesive okwamanje iwukusetshenziswa okukhulu kakhulu kodaka olukhethekile oluxutshwe okomile, olwakhiwe usimende njengento eyinhloko kasimende futhi yengezwe ngamaqoqo ahlanganisiwe, ama-agent okugcina amanzi, ama-ejenti wamandla okuqala, i-latex powder nezinye izithasiselo eziphilayo noma ezingaphili. ingxube. Ngokuvamile, idinga kuphela ukuxutshwa namanzi lapho isetshenziswa. Uma kuqhathaniswa nodaka olujwayelekile lukasimende, lungathuthukisa kakhulu amandla okubopha phakathi kwezinto ezibhekene ne-substrate, futhi linokumelana okuhle kokushelela kanye nokumelana okuhle kakhulu kwamanzi namanzi. Ngokuyinhloko isetshenziselwa ukunamathisela izinto zokuhlobisa ezifana nokwakha amathayela odonga lwangaphakathi nangaphandle, amathayela aphansi, njll. Isetshenziswa kakhulu ezindongeni zangaphakathi nangaphandle, phansi, izindlu zangasese, amakhishi nezinye izindawo zokuhlobisa izakhiwo. Okwamanje iyona esetshenziswa kabanzi kakhulu i-Tile bonding material.
Ngokuvamile lapho sahlulela ukusebenza kwe-adhesive ye-tile, asigcini nje ukunaka ukusebenza kwayo nokusebenza nekhono lokulwa nokuslayida, kodwa futhi sinake amandla ayo emishini kanye nesikhathi sokuvula. I-cellulose ether ku-adhesive tile ayithinti nje kuphela izakhiwo ze-rheological ze-adhesive porcelain, njengokusebenza okushelelayo, ummese wokunamathela, njll., kodwa futhi inethonya elinamandla ezintweni zemishini zokunamathisela i-tile.
2. Umthelela ngesikhathi sokuvulwa kwe-adhesive tile
Lapho impushana yenjoloba ne-cellulose ether kuhlangene odakeni olumanzi, amanye amamodeli edatha abonisa ukuthi impushana yenjoloba inamandla e-kinetic anamandla okunamathisela emikhiqizweni ye-cement hydration, futhi i-cellulose ether ikhona kakhulu ku-interstitial fluid, ethinta i-Mortar viscosity eyengeziwe nesikhathi sokumisa. Ukungezwani okungaphezulu kwe-cellulose ether kungaphezulu kwalokho kwempushana yerabha, futhi ukunothiswa kwe-cellulose ether okwengeziwe kusixhumi esibonakalayo sosimende kuzoba yinzuzo ekwakhekeni kwamabhondi e-hydrogen phakathi kwendawo eyisisekelo ne-cellulose ether.
Odakeni olumanzi, amanzi odaka ayahwamuka, futhi i-cellulose ether iyacetshiswa phezulu, futhi ifilimu izokwakhiwa ebusweni bodaka kungakapheli imizuzu emi-5, okuzonciphisa izinga lokuhwamuka okulandelayo, njengoba amanzi engeziwe ekhishwa. ikhishwe odakeni olujiyile Ingxenye yayo ithuthela oqweqweni lodaka oluncane, futhi ifilimu eyakhiwe ekuqaleni iyancibilika kancane, futhi ukufuduka kwamanzi kuzoletha i-cellulose eyengeziwe. ukucebisa kwe-ether endaweni yodaka.
Ngakho-ke, ukwakheka kwefilimu ye-cellulose ether ebusweni bodaka kunethonya elikhulu ekusebenzeni kodaka. I-1) Ifilimu eyenziwe incane kakhulu futhi izohlakazwa kabili, engakwazi ukukhawulela ukuhwamuka kwamanzi nokunciphisa amandla. 2) Ifilimu eyenziwe iminyene kakhulu, ukuhlushwa kwe-cellulose ether oketshezini lwe-mortar interstitial kuphezulu, futhi i-viscosity iphezulu, ngakho-ke akulula ukuphula ifilimu engaphezulu lapho amathayili enamathiselwe. Kungabonakala ukuthi izakhiwo zefilimu ze-cellulose ether zinomthelela omkhulu ngesikhathi esivulekile. Uhlobo lwe-cellulose ether (i-HPMC, i-HEMC, i-MC, njll.) kanye nezinga le-etherification (i-substitution degree) kuthinta ngokuqondile izakhiwo zefilimu ze-cellulose ether, kanye nobulukhuni nokuqina kwefilimu.
3. Ithonya emandleni omdwebo
Ngaphezu kokudlulisela izici ezinenzuzo ezishiwo ngenhla odakeni, i-cellulose ether iphinde ibambezele i-hydration kinetics kasimende. Lo mphumela wokuvinjelwa ubangelwa ikakhulukazi ukukhangisa kwama-molecule e-cellulose ether ezigabeni ezihlukahlukene zamaminerali ohlelweni lukasimende olunikezwa amanzi, kodwa ngokuvamile, ukuvumelana ukuthi ama-molecule e-cellulose ether adsorbed kakhulu emanzini afana ne-CSH ne-calcium hydroxide. Emikhiqizweni yamakhemikhali, ayivamile ukukhangiswa esigabeni sokuqala samaminerali se-clinker. Ngaphezu kwalokho, i-cellulose ether inciphisa ukuhamba kwama-ion (Ca2+, SO42-, ...) kusixazululo se-pore ngenxa yokwanda kwe-viscosity yesisombululo se-pore, ngaleyo ndlela kubambezeleka ngokwengeziwe inqubo yokukhipha amanzi.
I-viscosity ingenye ipharamitha ebalulekile, emele izici zamakhemikhali ze-cellulose ether. Njengoba kushiwo ngenhla, i-viscosity ithinta kakhulu amandla okugcina amanzi futhi iphinde ibe nomthelela omkhulu ekusebenzeni kodaka olusha. Kodwa-ke, izifundo zokuhlola zithole ukuthi i-viscosity ye-cellulose ether cishe ayinawo umthelela ku-kinetics ye-cement hydration. Isisindo se-molecular sinomthelela omncane ku-hydration, futhi umehluko omkhulu phakathi kwezisindo zamangqamuzana ahlukene yi-10min kuphela. Ngakho-ke, isisindo samangqamuzana asiyona ipharamitha eyinhloko yokulawula ukugeleza kukasimende.
Ukuncipha kwe-cellulose ether kuncike ekwakhekeni kwamakhemikhali ayo, futhi inkambiso evamile yaphetha ngokuthi, ku-MHEC, izinga eliphezulu le-methylation, umphumela obambezelekayo omncane we-cellulose ether. Ukwengeza, umphumela wokuhlehlisa we-hydrophilic substitution (njengokufaka esikhundleni se-HEC) unamandla kunalowo we-hydrophobic substitution (njengokufaka esikhundleni se-MH, MHEC, MHPC). Umthelela wokuhlehlisa we-cellulose ether uthintwa ikakhulukazi amapharamitha amabili, uhlobo nenani lamaqembu abambele.
Ukuhlola kwethu okuhlelekile kuphinde kwathola ukuthi okuqukethwe kwezinye izinto kudlala indima ebalulekile kumandla wokunamathisela amathayela. Sihlole ukusebenza kwe-HPMC ngamadigri ahlukene okushintsha izinto ezinamathelayo zamathayela, futhi sahlola umphumela wama-cellulose ethers aqukethe amaqembu ahlukene ngaphansi kwezimo ezihlukene zokwelapha Emiphumeleni ezicini zokunamathisela zamathayela.
Esivivinyweni, sicabangela i-HPMC, okuyi-ether eyinhlanganisela, ngakho-ke kufanele sihlanganise lezi zithombe ezimbili. Ku-HPMC, idinga izinga elithile lokumuncwa ukuze iqinisekise ukunyibilika kwayo kwamanzi kanye nokudluliswa kokukhanya. Siyazi okuqukethwe kwezinye izindawo Iphinde inqume izinga lokushisa lejeli le-HPMC, eliphinde linqume indawo yokusetshenziswa ye-HPMC. Ngale ndlela, okuqukethwe kweqembu kwe-HPMC okuvame ukusebenza nakho kufakwe kuhlaka ngaphakathi kwebanga. Kulolu hlu, indlela yokuhlanganisa i-methoxy ne-hydroxypropoxy Ukuze kuzuzwe umphumela omuhle kakhulu okuqukethwe kocwaningo lwethu. Umfanekiso wesi-2 ubonisa ukuthi phakathi kwebanga elithile, ukwanda kokuqukethwe kwamaqembu e-methoxyl kuzoholela ekwehleni kwamandla okudonsa, kuyilapho ukwanda kokuqukethwe kwamaqembu e-hydroxypropoxyl kuzoholela ekwandeni kwamandla okudonsa. . Kunomphumela ofanayo wamahora okuvula.
Ukushintsha kwethrendi yamandla emishini ngaphansi kwesimo sesikhathi esivulekile kuyahambisana nalokho ngaphansi kwezimo ezijwayelekile zokushisa. I-HPMC enokuqukethwe okuphezulu kwe-methoxyl (DS) nokuqukethwe kwe-hydroxypropoxyl (MS) ephansi inokuqina okuhle kwefilimu, kodwa izothinta udaka olumanzi ngokuphambene nalokho. izinto zokumanzisa izakhiwo.
Isikhathi sokuthumela: Jan-09-2023