Kwiminyaka yakutshanje, ngophuhliso oluqhubekayo lwetekhnoloji yokufakelwa kwe-thermal yodonga lwangaphandle, inkqubela phambili eqhubekayo ye-hydroxypropyl methyl cellulose iteknoloji yokuvelisa, kunye neempawu ezibalaseleyo ze-hydroxypropyl methyl cellulose HPMC ngokwayo, i-hydroxypropyl methyl cellulose HPMC isetyenziswe ngokubanzi kwishishini lokwakha.
ixesha lokumisela
Ixesha lokumisela ikhonkrithi lihambelana kakhulu nexesha lokumisa i-samente, kwaye i-aggregate inempembelelo encinci.Ke ngoko, ixesha lokumisela lodaka lingasetyenziselwa ukubuyisela uphando kwimpembelelo ye-HPMC ngexesha lokumisela umxube wekonkrithi ongaphantsi kwamanzi ongazisasaziyo.Ekubeni ixesha lokumisa lomdaka lichaphazelekayo ngumlinganiselo wesamente yamanzi kunye nesanti yesanti, ukwenzela ukuba kuhlolwe impembelelo ye-HPMC ngexesha lokumisela udaka, kuyimfuneko ukulungisa umlinganiselo wesamente yamanzi kunye nesanti yesanti yodaka.
Indlela yokusabela yovavanyo ibonisa ukuba ukongezwa kwe-HPMC kunempembelelo ephazamisayo kumxube wodaka, kwaye ixesha lokumisela udaka lonyuka ngokunyuka komthamo we-cellulose ether HPMC.Ngomlinganiselo ofanayo we-HPMC, ixesha lokumisela lodaka olwenziwe phantsi kwamanzi lide kunelo lenziwe emoyeni.Xa kulinganiswe emanzini, ixesha lokumisa lodaka oluxutywe ne-HPMC yi-6 ~ 18h kamva kwisetingi yokuqala kunye ne-6 ~ 22h kamva kwisimo sokugqibela kunelo lomzekelo ongenanto.Ke ngoko, i-HPMC kufuneka isetyenziswe kunye nearhente yamandla kwangoko.
I-HPMC i-polymer ene-macromolecular linear structure, kunye namaqela e-hydroxyl kumaqela asebenzayo, angenza iibhondi ze-hydrogen kunye nokuxuba iimolekyuli zamanzi ukwandisa i-viscosity yokuxuba amanzi.Amatyathanga eemolekyuli amade e-HPMC aya kutsala omnye komnye, enze iimolekyuli ze-HPMC zidibanise ukwenza isakhiwo sothungelwano, kunye nokusonga isamente kunye nokuxuba amanzi.Njengoko i-HPMC yenza i-network structure efana nefilimu kwaye isonge isamente, inokuthintela ngokufanelekileyo ukuguquguquka kwamanzi kwi-mortar kwaye ithintele okanye icothise isantya se-cement hydration.
Ukopha
Imeko yokopha yodaka iyafana naleyo yekhonkrithi, eya kubangela ukuhlaliswa okunzulu kwee-aggregates, ukwandisa umlinganiselo wesamente wamanzi we-slurry ephezulu yodaka, kubangele ukuba udaka oluphezulu lube ne-plastic shrinkage enkulu, okanye ukuqhekeka kwinqanaba lokuqala, kwaye ukomelela komphezulu wodaka buthathaka.
Xa idosi ingaphezulu kwe-0.5%, akukho ukopha.Oku kungenxa yokuba xa i-HPMC ixutywa kudaka, i-HPMC ine-film-forming kunye ne-reticular structure, kunye ne-adsorption ye-hydroxyl kwi-chain chain ye-macromolecule, eyenza i-samente kunye nokuxuba amanzi kwifom yodaka, iqinisekisa isakhiwo esizinzileyo. udaka.Xa i-HPMC yongezwa kudaka, amaqamza amancinci amaninzi azimeleyo aya kwenziwa.La maqamza aya kusasazwa ngokulinganayo kudaka kwaye athintele ukubekwa kweeaggregates.Le ntsebenzo yobugcisa ye-HPMC inempembelelo enkulu kwizinto ezisekelwe kwisamente, kwaye isoloko isetyenziselwa ukulungiselela imixube emitsha esekwe kwisamente njengodaka olomileyo kunye nodaka lwepolymer, ukuze babe namanzi alungileyo kunye nokugcinwa kweplastiki.
Imfuno yamanzi yodaka
Xa isixa se-HPMC sincinci kakhulu, sinempembelelo enkulu kwimfuno yamanzi yodaka.Phantsi komqathango wokuba ukwandiswa kodaka olutsha kuyafana, isixa se-HPMC kunye nemfuno yamanzi yodaka itshintsha ngokulandelelana ngexesha elithile, kwaye imfuno yamanzi yodaka iyancipha kuqala kwaye inyuke.Xa umxholo we-HPMC ungaphantsi kwe-0.025%, ngokunyuka komxholo we-HPMC, imfuno yamanzi yodaka iyancipha phantsi kweqondo elifanayo lokwandisa, ebonisa ukuba i-HPMC encinci, isiphumo sokunciphisa amanzi sodaka.Impembelelo umoya entraining of HPMC yenza udaka ukuba inani elikhulu amaqamza amancinci ezizimeleyo, ezidlala indima yokuthambisa kunye nokuphucula fluidity lodaka.Xa idosi ingaphezulu kwe-0.025%, imfuno yamanzi yodaka inyuka ngokunyuka kwedosi, okubangelwa ukunyaniseka kwesakhiwo sothungelwano lwe-HPMC, ukucutha umsantsa phakathi kweeflocs kwikhonkco elide le-molecular, umtsalane kunye nokubambisana, kunye nokunciphisa umbane wodaka.Ke ngoko, xa idigri yokwandisa iyafana, i-slurry ibonisa ukwanda kwemfuno yamanzi.
Ixesha lokuposa: Nov-25-2022