Hydroxypropyl Methylcellulose (HPMC) inowanzoshandiswa mumvura-inonyungudika polima inoshandiswa zvakanyanya mukuvaka, kunyanya simende-based tile adhesives. Iyo yakasarudzika yemakemikari zvimiro uye zvemuviri zvimiro zveHPMC zvinoita kuti iite basa rakakosha mukuvandudza kunamatira, kuita kwekuvaka, uye kusimba kwematairi anonamira.
(1) Ruzivo rwekutanga rweHPMC
1. Kemikari chimiro cheHPMC
HPMC inotorwa neselulosi inotorwa nekemikari kushandura yakasikwa cellulose. Chimiro chayo chinonyanya kuumbwa ne methoxy (-OCH₃) uye hydroxypropoxy (-CH₂CHOHCH₃) mapoka anotsiva mamwe mapoka e-hydroxyl pacheni ye cellulose. Ichi chimiro chinopa HPMC yakanaka solubility uye hydration kugona.
2. Zvinhu zvemuviri zveHPMC
Solubility: HPMC inogona kunyungudika mumvura inotonhora kuita inoonekera colloidal mhinduro uye ine yakanaka hydration uye thickening kugona.
Thermogelation: HPMC mhinduro inogadzira gel kana yapiswa uye inodzokera kune yemvura mamiriro mushure mekutonhora.
Chiitiko chepamusoro: HPMC ine chiitiko chakanaka chepamusoro mumhinduro, iyo inobatsira kugadzira yakagadzikana bubble chimiro.
Izvi zvakasarudzika zvemuviri uye zvemakemikari zvimiro zvinoita kuti HPMC ive yakanakira zvinhu zvekugadzirisa simende-yakavakirwa mataira anonamira.
(2) Mechanism yeHPMC inosimudzira mashandiro esimende-based tile adhesives.
1. Kuvandudza kuchengetedza kwemvura
Nheyo: HPMC inoumba viscous network chimiro mune mhinduro, iyo inogona kunyatso kukiya munyoro. Uku kugona kuchengetedza mvura kunokonzerwa nenhamba huru yemapoka ehydrophilic (senge hydroxyl mapoka) muHPMC mamorekuru, anogona kutora uye kuchengetedza hunyoro hwakawanda.
Kuvandudza adhesion: Cement-based tile adhesives inoda hunyoro kuti itore chikamu mune hydration reaction panguva yekuomesa maitiro. HPMC inochengetedza kuvepo kwehunyoro, ichibvumira simenti kuti inyatso hydrate, nekudaro ichivandudza kunamatira kwekunamatira.
Wedzera nguva yakazaruka: Kuchengetedzwa kwemvura kunodzivirira kunamatira kubva pakuoma nekukurumidza panguva yekuvaka, kuwedzera nguva yekugadzirisa yekuisa tile.
2. Kuvandudza kushanda kwekuvaka
Nheyo: HPMC ine yakanaka thickening mhedzisiro, uye mamorekuru ayo anogona kugadzira network-yakafanana chimiro mune aqueous mhinduro, nekudaro ichiwedzera viscosity yemhinduro.
Kuvandudza anti-sagging chivakwa: Iyo yakakora slurry ine zvirinani anti-sagging pfuma panguva yekuvaka, kuitira kuti mataira agare akatsiga munzvimbo yakafanotemerwa panguva yekugadzira uye kuti asatsvedza pasi nekuda kwesimba rinokwevera zvinhu pasi.
Kuvandudza fluidity: Iyo yakakodzera viscosity inoita kuti kunamira kuve nyore kushandisa uye kupararira panguva yekuvaka, uye panguva imwechete ine yakanaka operability, kuderedza kuoma kwekuvaka.
3. Wedzera kusimba
Nheyo: HPMC inosimudzira kuchengetedza kwemvura uye kunamatira kwekunamatira, nekudaro inovandudza kusimba kweiyo simende-based tile adhesive.
Kuvandudza simba rekubatanidza: Iyo yakazara hydrated simende substrate inopa kunamatira kwakasimba uye haigone kudonha kana kuputika panguva yekushandiswa kwenguva refu.
Enhad crack resistance: Kuchengetedza zvakanaka kwemvura kunodzivirira shrinkage yakakura yeadhesive panguva yekuomeswa, nokudaro kuderedza dambudziko rekutsemuka rinokonzerwa nekuderera.
(3) Experimental data support
1. Kuedza kuchengetedza mvura
Zvidzidzo zvakaratidza kuti chiyero chekuchengetedza mvura yesimende-based tile adhesives pamwe nekuwedzera kweHPMC inovandudzwa zvakanyanya. Semuenzaniso, kuwedzera 0.2% HPMC kune inonamira inogona kuwedzera mwero wekuchengetedza mvura kubva pa70% kusvika 95%. Kuvandudzwa uku kwakakosha pakuvandudza kusimba kwekubatanidza uye kusimba kweanonamatira.
2. Viscosity test
Huwandu hweHPMC hwakawedzerwa hune mhedzisiro yakakosha pane viscosity. Kuwedzera 0.3% HPMC kune simende-based tile adhesive inogona kuwedzera viscosity kakawanda, kuve nechokwadi chekuti inonamira ine yakanaka anti-sagging kuita uye kuita kwekuvaka.
3. Bond simba test
Kuburikidza nemiedzo yekuenzanisa, zvakaonekwa kuti simba rekubatanidza pakati pematairi uye substrates yeanonamira ane HPMC iri nani zvakanyanya pane yekunamira isina HPMC. Semuenzaniso, mushure mekuwedzera 0.5% HPMC, simba rekubatanidza rinogona kuwedzerwa ne30%.
(4) Mienzaniso yekushandisa
1. Kuisa matiles epasi uye madziro emadziro
Mukuradzika kwepasi nematairi emadziro, HPMC-inosimudzira simende-based tile adhesives yairatidza kuita kurinani kwekuvaka uye kubatana kunogara. Munguva yekuvaka, iyo yekunamatira haisi nyore kurasikirwa nemvura nekukurumidza, kuve nechokwadi chekugadzirisa kwekuvaka uye kupfava kwematairi.
2. Kunze kwemadziro ekudzivirira system
HPMC-enhanced adhesives zvakare inoshandiswa zvakanyanya mukunze kwemadziro ekudzivirira masisitimu. Kuchengetedza kwayo kwakanakisa kwemvura uye kunamatira kunovimbisa chisungo chakasimba pakati pebhodhi rekudzivirira uye madziro, nekudaro ichivandudza kusimba uye kugadzikana kwekunze kwemadziro ekudzivirira system.
Iko kushandiswa kweHPMC mune simende-based tile adhesives inovandudza zvakanyanya mashandiro ekunamatira. Nekuvandudza kuchengetwa kwemvura, kusimudzira kuita kwekuvaka nekuvandudza kusimba, HPMC inogadzira simende-yakavakirwa mataira anonamira zvakanyanya kukodzera kune zvemazuva ano zvekuvaka zvinodiwa. Nekuvandudzwa kwetekinoroji uye kuwedzera kuri kudiwa kwezvinhu zvekuvaka zvemhando yepamusoro, tarisiro yekushandiswa kweHPMC ichave yakakura.
Nguva yekutumira: Jun-26-2024