IHydroxypropyl methylcellulose (HPMC) yikhompawundi yepolymer enyibilikayo emanzini esetyenziswa kakhulu kwiinkalo zoshishino. Inokugcinwa kwamanzi okuyingqayizivele, ukuqina, ukubunjwa kwefilimu kunye neempawu zokudibanisa. Kwizicelo ezininzi zemizi-mveliso, iipropathi zokugcina amanzi ze-HPMC zibaluleke kakhulu, ngakumbi kulwakhiwo, iiseramikhi, iileyiti kunye namashishini axuba amayeza. Ukusebenza kwayo kokugcinwa kwamanzi akukwazi nje ukuphucula umgangatho wemveliso, kodwa nokwandisa ukusebenza kakuhle kwinkqubo yokuvelisa.
1. Ubume bekhemikhali kunye nokugcinwa kwamanzi kwe-HPMC
Isakhiwo se-molecular ye-HPMC yenziwe ngokuguqulwa kwe-cellulose ye-molecular skeleton nge-methylation kunye ne-hydroxypropylation. Olu hlengahlengiso lunyusa i-hydrophilicity kunye nokunyibilika kwayo, ngaloo ndlela ikhulisa umthamo wayo wokugcina amanzi. Iibhondi zeHydrojeni zinokubunjwa phakathi kwamaqela e-hydrophilic e-HPMC kunye neamolekyuli zamanzi, eziphucula amandla ezinto eziphathekayo ukuze adsorb nokugcina amanzi. Ekubeni i-HPMC i-polymer ephezulu ye-molecular, i-molecular chain chain inokwenza isakhiwo sothungelwano emanzini, ibambe iimolekyuli zamanzi kwaye zithintele ukuba zingabi ngumphunga okanye ziphuluke ngokukhawuleza. Le propati yenza i-HPMC ibe yongezelelo oluyimfuneko kwiimveliso ezininzi zemizi-mveliso ukugcina ubumanzi kunye nokusebenza kokusebenza kweemveliso.
2. Ukugcinwa kwamanzi kushishino lokwakha
Kwishishini lokwakha, i-HPMC isetyenziswa rhoqo kwiimveliso ezifana nodaka lwesamente, izinto ezisekelwe kwi-gypsum kunye ne-adhesives tile, kunye nokusebenza kwayo kokugcinwa kwamanzi kuchaphazela ngokuthe ngqo umgangatho wokwakha. I-HPMC yandisa ixesha lokusebenza kwesamente kunye nezixhobo zegypsum ngokusebenza kwayo okugqwesileyo kokugcinwa kwamanzi, iqinisekisa ukuba kukho amanzi aneleyo ukugqiba ukusabela kokunyanga ngexesha lenkqubo yokwakha. Oku kulandelayo ngamanqaku aphambili aliqela ukuze i-HPMC idlale indima yogcino lwamanzi kwibala lolwakhiwo:
Yandisa ixesha lokusebenza: I-HPMC yandisa ixesha elisebenzayo lodaka okanye i-gypsum slurry ngokucothisa ukuphuphuma kwamanzi, ukuvumela abasebenzi bokwakha ukuba babe nexesha elingakumbi lokulungelelanisa kunye nenqanaba.
Ukuphucula umgangatho wokuphilisa: Ukugcinwa okuphakathi kokufuma kunceda ukunyangwa okufanayo kwesamente kunye nezixhobo zegypsum, ukuphepha ukuqhekeka kunye nokulahlekelwa kwamandla okubangelwa ukufuma okunganeleyo.
Ukuphucula ukusebenza kwe-bonding: Kwi-adhesives tile, i-HPMC iqinisekisa ukuba umswakama owaneleyo unokugcinwa kwi-bonding layer, ukuqinisekisa ukuba i-adhesive idibanisa kakuhle kunye ne-substrate kunye ne-tile surface ngaphambi kokumisa, ngaloo ndlela iphucula amandla okudibanisa.
3. Ukusetyenziswa kwishishini le-ceramic
Inkqubo yokuvelisa i-ceramic ifuna ukususwa ngokuthe ngcembe komswakama kumzimba oluhlaza ngaphambi kokudubula okuphezulu kobushushu ukukhusela ukuqhekeka kunye neengxaki zokuguqulwa kwimveliso egqityiweyo. Njengearhente yokugcina amanzi kunye ne-ejenti yokwenza ifilimu, i-HPMC inokwandisa inkqubo yokomisa kwimveliso ye-ceramic:
Ukomisa okufanayo: I-HPMC inokunceda imizimba ye-ceramic eluhlaza igcine ukuhanjiswa kokufuma okufanayo ngexesha lenkqubo yokomisa, ukuthintela ukuqhekeka komphezulu okanye ukuguqulwa okubangelwa kukulahleka kokufuma okugqithisileyo.
Ukuphucula amandla omzimba ohlaza: Ekubeni isakhiwo sothungelwano esenziwe yi-HPMC sinokusasaza ngokulinganayo umswakama ngaphakathi komzimba oluhlaza, amandla omzimba ohlaza aphuculwa ngaphambi kokumisa, ukunciphisa umngcipheko wokulimala ngexesha lokuthutha okanye ukuphatha.
4. Isiphumo sokugcina amanzi kwishishini lokutyabeka kunye ne-inki
Ukusetyenziswa kwe-HPMC kwi-coatings kunye nee-inki kukwaxhamla kwiipropati zayo ezigqwesileyo zokugcina amanzi. Kwizinto zokugquma ezisekelwe emanzini kunye neenki ezisekelwe emanzini, i-HPMC ayikwazi ukubonelela nge-viscosity efanelekileyo kuphela, kodwa iphinde ithintele i-coating ukuba ibe ne-fluidity embi okanye ukwakheka kwefilimu engalinganiyo ngenxa yokunyuka kwamanzi amaninzi ngexesha lokusetyenziswa.
Ukuthintela ukuqhekeka: I-HPMC inqanda ukuqhekeka okanye imingxunya ngexesha lokumisa inkqubo yokugquma ngokulawula izinga lokunyuka kwamanzi kwi-coating.
Ukuphucula ukugudiswa komphezulu: Ubungakanani obufanelekileyo bokugcinwa komswakama kuvumela ukuba i-coating ihambe ngokwemvelo ngexesha lenkqubo yokomisa, iqinisekisa indawo epholileyo kunye nengenasiphako.
5. Ukugcinwa kwamanzi kwishishini lamachiza
Kumashishini axuba amayeza, i-HPMC isetyenziswa kakhulu ekwenzeni iipilisi, iipilisi kunye nokunqunyanyiswa kweziyobisi. Iipropati zokugcina amanzi ze-HPMC azincedi nje ukuphucula uzinzo lwasemzimbeni lwamachiza, kodwa zikwalawula izinga lokukhululwa kwamachiza kumalungiselelo athile echiza:
Ukukhululwa kweziyobisi ixesha elide: Ngokusebenzisana kunye neemolekyuli zamanzi, i-HPMC inokwenza ifilimu yokugcina amanzi ekulungiseleleni, ukulibazisa izinga lokukhululwa kweyeza, ngaloo ndlela ifezekise umphumo wokukhululwa.
Ukuphucula ukwenza ithebhulethi: Ngexesha lokwenziwa kwethebhulethi, i-HPMC inokugcina ukufuma okufanelekileyo kwi-tablet matrix ukuthintela iipilisi ukuba zingaphuki okanye ziqhekeke ngexesha lokucinezela nokugcina.
6. Ukugcinwa kwamanzi kwezinye iindawo zoshishino
I-HPMC ikwabonisa ugcino lwamanzi olugqwesileyo kwezinye iindawo zoshishino. Ngokomzekelo, kushishino lokutya, i-HPMC isoloko isetyenziswa njenge-thickener kunye ne-stabilizer ukukhusela ukutya ekulahlekelweni kokufuma. Kwiimveliso zokhathalelo lomntu, i-HPMC yonyusa amava okusetyenziswa kweemveliso zokhathalelo lwesikhumba ngeziphumo zokuthambisa. Ukongeza, ekuxhatshazweni kwentsimi yeoli, i-HPMC ingasetyenziswa njenge-thickener kunye nokugcina amanzi kwi-drilling fluids ukuqinisekisa ukuba ulwelo lokomba lusenokugcina ubumanzi phantsi kobushushu obuphezulu kunye neemeko zoxinzelelo oluphezulu.
Ukuqukumbela
Njengesixhobo esisebenza kakhulu sokugcina amanzi, i-HPMC ibonise ukusebenza okugqwesileyo kwiintlobo ngeentlobo zezicelo zoshishino ngokusebenzisa ubume bayo beekhemikhali ezizodwa kunye neempawu ezibonakalayo. Akunakwandisa kuphela ixesha lokusebenza kwezinto, ukuphucula ukubunjwa kunye nokunyanga umgangatho weemveliso, kodwa nokuqinisekisa ukuzinza kweemveliso ngexesha lokuvelisa kunye nesicelo ngokulawula ukukhuphuka kwamanzi. Ngokuqhubeka nzulu kophando kunye nokusetyenziswa kwe-HPMC, ukusebenza kwayo kokugcina amanzi kwindawo yoshishino kuya kusetyenziswa ngokubanzi kwaye kuphuculwe.
Ixesha lokuposa: Sep-09-2024