Kwi-samente mortar kunye ne-gypsum-based slurry, i-hydroxypropyl methylcellulose idlala indima yokugcina amanzi kunye nokuqina, kwaye inokuphucula ngempumelelo ukunamathela kunye nokumelana nokuwa kwe-slurry.
Izinto ezifana nobushushu bomoya, ubushushu kunye nesantya soxinzelelo lomoya ziya kuchaphazela izinga lokuguquguquka kwamanzi kwi-samente mortar kunye neemveliso ezisekwe kwi-gypsum. Ke ngoko, ngamaxesha ahlukeneyo onyaka, kukho umahluko othile kwisiphumo sokugcina amanzi kwiimveliso ezinomlinganiselo ofanayo we-hydroxypropyl methylcellulose eyongeziweyo. Kwisakhiwo esithile, isiphumo sokugcina amanzi kwi-slurry sinokulungiswa ngokunyusa okanye ukunciphisa inani le-HPMC eyongeziweyo. Ukugcinwa kwamanzi phantsi kweemeko zobushushu obuphezulu luphawu olubalulekileyo lokwahlula umgangatho we-hydroxypropyl methylcellulose ether.
Iimveliso ezibalaseleyo ze-hydroxypropyl methylcellulose series zinokusombulula ngempumelelo ingxaki yokugcina amanzi phantsi kobushushu obuphezulu. Ngamaxesha obushushu obuphezulu, ingakumbi kwiindawo ezishushu nezomileyo kunye nolwakhiwo oluncinci kwicala elinelanga, i-HPMC esemgangathweni ophezulu iyafuneka ukuphucula ukugcinwa kwamanzi kwe-slurry. I-HPMC esemgangathweni ophezulu inokufana okuhle kakhulu. Amaqela ayo e-methoxy kunye ne-hydroxypropoxy asasazwa ngokulinganayo kwi-cellulose molecular chain, enokuphucula amandla ee-athomu ze-oxygen kwi-hydroxyl kunye ne-ether bonds ukuba zidibane namanzi ukuze zenze ii-hydrogen bonds. , ukuze amanzi akhululekileyo abe ngamanzi abotshelelweyo, ukuze kulawulwe ngempumelelo ukufuma kwamanzi okubangelwa yimozulu eshushu ephezulu, kwaye kufezekiswe ukugcinwa kwamanzi okuphezulu.
I-hydroxypropyl methylcellulose ekumgangatho ophezulu ingasasazwa ngokulinganayo nangokufanelekileyo kwi-samente mortar kunye neemveliso ezisekwe kwi-gypsum, kwaye igqume zonke iinxalenye eziqinileyo, kwaye yenze ifilimu yokumanzisa, kwaye umswakama kwisiseko ukhutshwa kancinci kancinci kwixesha elide, kunye nempendulo yokumanzisa kunye nezinto ze-inorganic gelling ukuqinisekisa amandla okubopha kunye namandla okucinezela kwezinto.
Ngoko ke, kulwakhiwo lwasehlotyeni olushushu kakhulu, ukuze kufezekiswe isiphumo sokugcina amanzi, kuyimfuneko ukongeza iimveliso ze-HPMC ezikumgangatho ophezulu ngobuninzi obaneleyo ngokwefomula, kungenjalo, kuya kubakho ukufuma okwaneleyo, amandla anciphileyo, ukuqhekeka, ukugoba kunye nokuchitheka okubangelwa kukoma kakhulu. kodwa kwandise ubunzima bokwakha babasebenzi. Njengoko ubushushu busiya buhla, ubungakanani be-HPMC eyongeziweyo bunokuncipha kancinci kancinci, kwaye isiphumo esifanayo sokugcina amanzi sinokufezekiswa.
Ixesha lokuthumela: Epreli-13-2023