Udaka oluxutywe manzi yisamente, iaggregate ecolekileyo, ingxubevange, amanzi kunye nezinto ezahlukeneyo ezimiselwe ngokokusebenza. Ngokomlinganiselo othile, emva kokulinganiswa kunye nokuxutywa kwisikhululo sokuxuba, sithuthelwa kwindawo yokusetyenziswa yiloli yokuxuba, kwaye ifakwe kwindawo ekhethekileyo Umxube omanzi ugcinwa kwisitya kwaye usetyenziswe ngexesha elichaziweyo.
I-Hydroxypropyl methylcellulose isetyenziswa njenge-arhente yokugcina amanzi kunye ne-retarder yodaka lwesamente ukwenza udaka olumpompozayo. Isetyenziswe njenge-binder kwi-plastering plaster, iphucula ukusasazeka kunye nokwandisa ixesha lokusebenza. Ukusebenza kokugcinwa kwamanzi kwe-hydroxypropyl methylcellulose HPMC ikhusela i-slurry ekuqhekekeni ngenxa yokoma ngokukhawuleza emva kokusetyenziswa, kwaye iphakamisa amandla emva kokuqina. Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-hydroxypropyl methylcellulose HPMC, kwaye ikwayintsebenzo apho abaninzi abavelisi bodaka basekhaya abaxubeneyo banika ingqalelo. Izinto ezichaphazela umphumo wokugcinwa kwamanzi omdaka odibeneyo omanzi ziquka ubungakanani be-HPMC eyongeziweyo, i-viscosity ye-HPMC, ukucocwa kwamaqhekeza, kunye nobushushu bendawo yokusetyenziswa.
Indima ebalulekileyo ye-hydroxypropyl methylcellulose HPMC kudaka oluxubeneyo olumanzi ikakhulu inemiba emithathu, enye yeyokugcina umthamo wamanzi ogqwesileyo, enye yimpembelelo yokungaguquguquki kunye ne-thixotropy yodaka lomxube omanzi, kwaye okwesithathu kukunxibelelana nesamente. Ukugcinwa kwamanzi kwi-ether ye-cellulose kuxhomekeke ekufunjweni kwamanzi kwinqanaba lesiseko, ukubunjwa kodaka, ubukhulu bodaka lodaka, imfuno yamanzi yodaka, kunye nexesha lokumisela izinto zokumisela. Ukuphakama kokungafihli kwe-hydroxypropyl methylcellulose, kokukhona kungcono ukugcinwa kwamanzi.
Izinto ezichaphazela ukugcinwa kwamanzi kwi-wet-mix mortar ziquka i-cellulose ether viscosity, inani elongezelelweyo, ukucolwa kwamasuntswana kunye nobushushu bokusebenzisa. Ubukhulu be-viscosity ye-cellulose ether, ngcono ukugcinwa kwamanzi ukusebenza. I-Viscosity yiparameter ebalulekileyo yokusebenza kwe-HPMC. Kwimveliso efanayo, iziphumo ze-viscosity ezilinganiswe ngeendlela ezahlukeneyo zahluke kakhulu, kwaye ezinye zide ziphindwe kabini. Ke ngoko, xa uthelekisa i-viscosity, kufuneka iqhutywe phakathi kweendlela ezifanayo zokuvavanya, kubandakanya ubushushu, i-rotor, njl.
Ngokuqhelekileyo, okukhona i-viscosity iphezulu, ingcono isiphumo sokugcina amanzi. Nangona kunjalo, ukuphakama kwe-viscosity kunye nokuphakama kwe-molecular weight ye-HPMC, ukuhla okuhambelanayo kwi-solubility yayo kuya kuba nefuthe elibi kumandla kunye nokusebenza kokwakhiwa kodaka. Ukuphakama kwe-viscosity, kuyabonakala ngakumbi umphumo wokuqina kumdaka, kodwa awuhambelani ngokuthe ngqo. Ukuphakama kwe-viscosity, i-viscous ngakumbi i-mortar emanzi iya kuba, oko kukuthi, ngexesha lokwakha, kubonakaliswa njengokunamathela kwi-scraper kunye nokunamathela okuphezulu kwi-substrate. Kodwa akuncedi ukunyusa amandla esakhiwo sodaka olumanzi ngokwalo. Ngexesha lokwakha, ukusebenza kwe-anti-sag akubonakali. Ngokuchasene noko, enye i-hydroxypropyl methylcellulose elungisiweyo ene-viscosity ephakathi kunye nephantsi inomsebenzi obalaseleyo ekuphuculeni amandla okwakhiwa kodaka olumanzi.
Ubuninzi be-cellulose ether HPMC eyongeziweyo kudaka oluxutyiweyo olumanzi, ngcono ukusebenza kokugcinwa kwamanzi, kunye nokuphakama kwe-viscosity, ngcono ukusebenza kokugcinwa kwamanzi. Ukulunga kwakhona isalathiso esibalulekileyo sokusebenza kwe-hydroxypropyl methylcellulose.
Ukulunga kwe-hydroxypropyl methylcellulose nako kunempembelelo ethile ekugcineni amanzi. Ngokuqhelekileyo, kwi-hydroxypropyl methylcellulose ene-viscosity efanayo kodwa ukucoleka okwahlukileyo, ngokucoleka kokucoleka kokugqwesa Isiphumo sokugcina amanzi singcono.
Kudaka oluxutywe manzi, umlinganiselo wokongezwa we-cellulose ether HPMC uphantsi kakhulu, kodwa unokuphucula kakhulu ukwakhiwa kodaka oluxutywe nomanzi, kwaye iyona nto yokongeza echaphazela ukwakhiwa kodaka. Ukukhetha okunengqiqo kwe-hydroxypropyl methylcellulose echanekileyo kunempembelelo enkulu ekuphuculeni ukusebenza kodaka oluxutywe ngamanzi.
Ixesha lokuposa: Mar-31-2023