IHydroxypropyl Methylcellulose (HPMC) idlala indima ebalulekileyo kudaka oluxutyiweyo oluxutyiweyo. Udaka oluxutyiweyo oluxutyiweyo oluxutyiweyo luyinto eyomileyo eyenziwe ngumgubo owenziwe ngokuxuba i-aggregates, i-samente, iifayili kunye neentlobo ezahlukeneyo zokudibanisa kwimilinganiselo ethile. Ingasetyenziswa kwindawo yokwakha ngokugalela nje amanzi kunye nokuvuselela. Njenge-ether ye-cellulose esebenza kakhulu, i-HPMC idlala imisebenzi emininzi kwi-dry-mixed esele ilungile, iphucula kakhulu ukusebenza kwee-mortars.
1. Ukugcinwa kwamanzi
Umsebenzi ophambili we-HPMC kukuphucula ukugcinwa kwamanzi odaka. Ekubeni iimolekyuli ze-cellulose ziqulethe inani elikhulu le-hydroxyl kunye namaqela e-methoxy, zinokwenza iibhondi ze-hydrogen kunye neemolekyuli zamanzi, ngaloo ndlela ziphucula amandla okugcina amanzi omdaka. Ukugcinwa kakuhle kwamanzi kuvumela ukufuma kumdaka ukuba kugcinwe ekuphumeni ngokukhawuleza kwexesha elide, okubalulekileyo ekwandiseni ixesha lokuvula, ukuphucula ukusebenza kokwakhiwa, ukunciphisa iintanda kunye nokuphucula amandla omdaka. Ngokukodwa ekwakhiweni kwe-high-temperature okanye i-low-water-absorbent substrates, umphumo wokugcinwa kwamanzi we-HPMC ubonakala ngokucacileyo.
2. Ukuphucula ukusebenza kolwakhiwo
I-HPMC inika udaka iipropati ezigqwesileyo zokwakha. Okokuqala, kuphucula ukusebenza kodaka, okwenza udaka oluxubileyo lube lufana kwaye luhle. Okwesibini, i-HPMC iphucula i-thixotropy yodaka, oko kukuthi, udaka lunokugcina ukuhambelana okuthile xa umile, kodwa uhamba ngokulula phantsi koxinzelelo. Olu phawu lwenza ukuba udaka lube nokusebenza kakuhle kunye nokumpompa ngexesha lokwakha, kwaye kulula ukuyifaka kwaye igudile. Ukongeza, i-HPMC inokunciphisa ngokufanelekileyo ukunamathela kodaka ngexesha lokwakha, ukwenza izixhobo zokwakha zibe lula ukucoca.
3. Ipropati ye-Anti-sag
Ngexesha lolwakhiwo kwiindawo ezithe nkqo, udaka luthanda ukudilika ngenxa yomxhuzulane, luchaphazela umgangatho wokwakha. I-HPMC inokuphucula kakhulu ukuxhathisa kwe-sag yodaka, ivumela udaka ukuba lubambelele ngcono kumphezulu we-substrate kumanqanaba okuqala emva kokwakhiwa kwaye ugweme ukugoba. Oku kubaluleke kakhulu kwizinto ezifana nokunamathiswa kweethayile kunye nodaka lwe-plaster olufuna ukusetyenziswa kwiindawo ezithe nkqo.
4. Ukuphucula ukugcinwa kweplastiki
I-HPMC inokuphucula ukugcinwa kweplastiki yodaka, iyenze ukuba ingabikho lula ukushwabana nokuqhekeka ngexesha lenkqubo yokunyanga. Indlela yayo kukwandisa umthamo wokufuma kwidaka ngokuphucula i-microstructure yodaka, ngaloo ndlela kuncitshiswe isantya sokumka kwamanzi. Ukongeza, i-HPMC inokwenza ulwakhiwo oluthile lwenethiwekhi kudaka, iphucule amandla okuqina kunye nokuguquguquka kodaka, kunye nokunciphisa iintanda ezibangelwa kukuncipha kodaka ngexesha lenkqubo yokuqina.
5. Ukuphucula amandla okudibanisa
I-HPMC inokuphucula amandla ebhondi yodaka. Oku kubangelwa ikakhulu ngamaqela e-polar aqulethwe kwisakhiwo sayo semolekyuli, enokuthi ibhengeze ngokwasemzimbeni ngeemolekyuli kumphezulu we-substrate kunye nokuphucula amandla okudibanisa phakathi kodaka kunye ne-substrate. Kwangaxeshanye, ukugcinwa kwamanzi okubonelelwa yi-HPMC kukwanceda ukusabela kwe-cement hydration ukuba kuqhubeke ngokupheleleyo, ngaloo ndlela kuphuculwe ngakumbi amandla okubopha udaka.
6. Lungisa ukuhambelana kodaka
I-HPMC inokuhlengahlengisa ukuhambelana kodaka ukuze udaka lufezekise ulwelo olululo kunye nokusebenza emva kokongeza amanzi. HPMC kunye viscosities ezahlukeneyo zingasetyenziswa kwiintlobo ezahlukeneyo zodaka. Ukukhetha imveliso efanelekileyo ngokweemfuno zangempela kunokwenza udaka lula ukulawula nokusebenzisa ngexesha lokwakha.
7. Ukuphucula uzinzo lodaka
I-HPMC inokuphucula ukuzinza kodaka kunye nokunciphisa ukuhlukana kodaka ngexesha lokuxuba kunye nokuthutha. Ngenxa yempembelelo yayo ephezulu yokuqina, inokuzinzisa amasuntswana aqinileyo kumdaka, ukuthintela ukuhlaliswa kunye ne-delamination, kwaye ugcine udaka lukwimo efanayo ngexesha lenkqubo yokwakha.
8. Ukumelana nemozulu
Ukongezwa kwe-HPMC kunokuphucula ukuxhathisa imozulu yodaka, ngakumbi phantsi kweemeko zemozulu ezinzima. Inokunciphisa uxinzelelo lwe-thermal olubangelwa utshintsho lweqondo lokushisa kwi-mortar, ngaloo ndlela iphucula ukuqina kunye nobomi benkonzo yodaka.
Njengesongezo esibalulekileyo, i-hydroxypropyl methylcellulose iye yaphucula kakhulu iipropathi zokulungiselela umxube owomileyo ngogcino lwawo lwamanzi olugqwesileyo, uhlengahlengiso lokwenziwa komsebenzi wolwakhiwo, ukunganyangeki, ukugcinwa kweplastiki okwandisiweyo kunye namandla okubopha. Umgangatho kunye nokusebenza kokwakhiwa kodaka oluxubileyo. Ukusetyenziswa kwayo akunakuphucula kuphela iipropati ezibonakalayo zodaka, kodwa nokuphucula ukusebenza kakuhle kolwakhiwo kunye nokunciphisa ubunzima bokwakha, ngaloo ndlela isetyenziswe ngokubanzi ekwakheni.
Ixesha lokuposa: Jul-04-2024