I-Hydroxypropyl Methylcellulose (HPMC) isetyenziswa ngokuqhelekileyo i-polymer e-soluble yamanzi esetyenziswa ngokubanzi kwizinto zokwakha, ngakumbi i-samente-based adhesives tile. Iimpawu ezizodwa zeekhemikhali kunye neempawu ezibonakalayo ze-HPMC ziyenza idlale indima ebalulekileyo ekuphuculeni ukunamathela, ukusebenza kolwakhiwo, kunye nokuqina kwee-adhesives tile.
(1) Ulwazi olusisiseko lwe-HPMC
1. Ubume beMichiza ye-HPMC
I-HPMC sisilulo seselulosi esifunyenwe ngokuguqula ngokwekhemikhali iselulosi yendalo. Isakhiwo salo senziwa ikakhulu yi-methoxy (-OCH₃) kunye ne-hydroxypropoxy (-CH₂CHOHCH₃) amaqela athatha indawo yamaqela athile e-hydroxyl kwi-cellulose chain. Esi sakhiwo sinika HPMC ukunyibilika elungileyo kunye hydration isakhono.
2. Iimpawu ezibonakalayo ze-HPMC
Ukunyibilika: I-HPMC inokunyibilika emanzini abandayo ukwenza isisombululo se-colloidal esiselubala kwaye inamandla okuhambisa amanzi kunye nokujiya.
Thermogelation: Isisombululo se-HPMC siya kwenza ijeli xa ishushu kwaye ibuyele kwimeko yolwelo emva kokupholisa.
Umsebenzi womphezulu: I-HPMC inomsebenzi olungileyo womphezulu kwisisombululo, enceda ukwenza ubume beqamza obuzinzileyo.
Ezi zakhiwo ezizodwa zomzimba kunye neekhemikhali zenza i-HPMC ibe yinto efanelekileyo yokuguqula izinto zokuncamathelisa iithayile ezisekelwe kwisamente.
(2) Inkqubo ye-HPMC yokuphucula ukusebenza kwe-cement-based adhesives tile
1. Ukuphucula ukugcinwa kwamanzi
Umgaqo: I-HPMC yenza i-viscous network structure kwisisombululo, esinokuvala ngokufanelekileyo kumswakama. Ubunakho bokugcina amanzi bubangelwa inani elikhulu lamaqela e-hydrophilic (njengamaqela e-hydroxyl) kwii-molecule ze-HPMC, ezinokufunxa kwaye zigcine ubuninzi bokufuma.
Ukuphucula ukubambelela: I-cement-based adhesives tile adhesives ifuna umswakama ukuthatha inxaxheba kwi-hydration reaction ngexesha lenkqubo yokuqina. I-HPMC igcina ubukho bokufuma, ivumela i-samente ukuba i-hydrate ngokupheleleyo, ngaloo ndlela iphucula ukunamathela kwe-adhesive.
Ukwandisa ixesha elivulekileyo: Ukugcinwa kwamanzi kuthintela i-adhesive ukuba yome ngokukhawuleza ngexesha lokwakha, ukwandisa ixesha lokulungelelanisa ukubeka i-tile.
2. Ukuphucula ukusebenza kolwakhiwo
Umgaqo: I-HPMC inesiphumo esihle sokuqina, kwaye iimolekyuli zayo zinokwenza isakhiwo esifana nenethiwekhi kwisisombululo esinamanzi, ngaloo ndlela kwandisa i-viscosity yesisombululo.
Phucula ipropathi yokuchasana nokudodobala: I-slurry ejiyileyo inepropathi engcono yokuchasana nokugrumba ngexesha lenkqubo yokwakha, ukuze iithayile zihlale zizinzileyo kwindawo emiselweyo ngexesha lenkqubo yokupakisha kwaye aziyi kutyibilika ngenxa yomxhuzulane.
Ukuphucula i-fluidity: I-viscosity efanelekileyo yenza ukuba i-adhesive ibe lula ukuyisebenzisa kwaye isasazeke ngexesha lokwakha, kwaye ngexesha elifanayo linokusebenza kakuhle, ukunciphisa ubunzima bokwakha.
3. Ukomeleza ukuqina
Umgaqo: I-HPMC iphucula ukugcinwa kwamanzi kunye nokubambelela kwi-adhesive, ngaloo ndlela iphucula ukuqina kwe-cement-based adhesive tile.
Ukuphucula amandla okudibanisa: I-substrate ye-sement egcwele i-hydrated inikezela ukunamathela okunamandla kwaye ayinakukwazi ukuwa okanye ukuqhekeka ngexesha lokusetyenziswa kwexesha elide.
Ukuphucula ukuchasana nokuqhekeka: Ukugcinwa kakuhle kwamanzi kugwema ukucutha okukhulu kwe-adhesive ngexesha lenkqubo yokomisa, ngaloo ndlela kunciphisa ingxaki yokuqhekeka okubangelwa yi-shrinkage.
(3) Ukuxhaswa kwedatha yovavanyo
1. Uvavanyo lokugcina amanzi
Uphononongo lubonise ukuba izinga lokugcinwa kwamanzi kwi-samente-based adhesives tile adhesives kunye nokongezwa kwe-HPMC kuphuculwe kakhulu. Ngokomzekelo, ukongeza i-0.2% ye-HPMC kwi-adhesive inokunyusa izinga lokugcinwa kwamanzi ukusuka kwi-70% ukuya kwi-95%. Olu phuculo lubalulekile ekuphuculeni amandla okudibanisa kunye nokuqina kwe-adhesive.
2. Uvavanyo lwe-Viscosity
Isixa se-HPMC esongeziweyo sinempembelelo ebalulekileyo kwi-viscosity. Ukongeza i-0.3% ye-HPMC kwi-adhesive tile esekelwe kwi-samente inokunyusa i-viscosity ngamaxesha amaninzi, iqinisekisa ukuba i-adhesive inomsebenzi omhle wokuchasana nokunciphisa kunye nokusebenza kokwakhiwa.
3. Uvavanyo lwamandla ebhondi
Ngokusebenzisa imifuniselo yokuthelekisa, kwafunyaniswa ukuba amandla okudibanisa phakathi kweethayile kunye ne-substrates ye-adhesives equlethe i-HPMC ingcono kakhulu kunaleyo ye-adhesives ngaphandle kwe-HPMC. Ngokomzekelo, emva kokongeza i-0.5% ye-HPMC, amandla okudibanisa anokunyuswa malunga ne-30%.
(4) Imizekelo yokusetyenziswa
1. Ukubekwa kweethayile zomgangatho kunye neethayile zodonga
Ekubekweni kwangempela kweethayile zomgangatho kunye neethayile zodonga, i-HPMC-ephuculweyo ye-cement-based adhesives ye-adhesives ibonise ukusebenza okungcono kolwakhiwo kunye nokudibanisa okungapheliyo. Ngethuba lenkqubo yokwakhiwa, i-adhesive akulula ukulahlekelwa ngamanzi ngokukhawuleza, ukuqinisekisa ukuguquguquka kokwakhiwa kunye nokukhanya kweetayile.
2. Inkqubo yokugquma iindonga zangaphandle
Izinto zokuncamathelisa ezongeziweyo ze-HPMC nazo zisetyenziswa ngokubanzi kwiinkqubo zokugquma eludongeni zangaphandle. Ukugcinwa kwayo kwamanzi okugqwesileyo kunye nokubambelela kuqinisekisa ibhondi eqinile phakathi kwebhodi yokugquma kunye nodonga, ngaloo ndlela iphucula ukuqina kunye nokuzinza kwenkqubo yodonga lwangaphandle.
Ukusetyenziswa kwe-HPMC kwi-adhesive tile esekelwe kwi-samente kuphucula kakhulu ukusebenza kwe-adhesive. Ngokuphucula ukugcinwa kwamanzi, ukuphucula ukusebenza kolwakhiwo kunye nokuphucula ukuqina, i-HPMC yenza i-adhesives ye-samente esekelwe kwi-tile ifaneleke ngakumbi kwiimfuno zokwakha zanamhlanje. Ngophuhliso lwetekhnoloji kunye nokunyuka kwemfuno yezixhobo zokwakha ezisebenza kakhulu, amathuba okusetyenziswa kwe-HPMC aya kuba banzi.
Ixesha lokuposa: Jun-26-2024