Kwimveliso yezinto zokwakha, ngakumbi udaka lomgubo olomileyo,i-cellulose etheridlala indima ebalulekileyo, ngokukodwa kwimveliso yodaka olukhethekileyo (udaka olulungisiweyo), luyinxalenye ebalulekileyo. Indima ebalulekileyo ye-ether eselulosi enyibilikayo emanzini kudaka ubukhulu becala yeyona ndlela ibalaseleyo yokugcina amanzi. Ukugcinwa kwamanzi kwi-ether ye-cellulose kuxhomekeke ekufunjweni kwamanzi kwinqanaba lesiseko, ukubunjwa kodaka, ubukhulu bodaka lodaka, imfuno yamanzi yodaka, kunye nexesha lokumisela izinto zokumisela.
Uninzi lwee-masonry kunye nodaka lokutyabeka aluwagcini kakuhle amanzi, kwaye amanzi kunye nodaka luya kwahlukana emva kwemizuzu embalwa yokuma. Ukugcinwa kwamanzi ngumsebenzi obalulekileyo we-methyl cellulose ether, kwaye ikwayintsebenzo eyenziwa ngabavelisi abaninzi basekhaya abaxubene nodaka, ngakumbi abo bakwiingingqi ezisemazantsi ezinobushushu obuphezulu, banikele ingqalelo kuyo. Izinto ezichaphazela umphumo wokugcinwa kwamanzi kwi-powder mortar eyomileyo ziquka ubungakanani bokongeza, i-viscosity, i-fineness of particles, kunye nobushushu bendawo yokusetyenziswa.
Ukugcinwa kwamanzi kwei-cellulose etherngokwayo ivela ekunyibilikeni kunye nokuphelelwa ngamanzi emzimbeni kwe-cellulose ether ngokwayo. Njengoko sonke sisazi, nangona i-cellulose i-molecular chain iqulethe inani elikhulu lamaqela e-OH anamandla, ayinyibiliki emanzini, kuba isakhiwo se-cellulose sinezinga eliphezulu le-crystallinity. Isakhono se-hydration samaqela e-hydroxyl iyodwa akwanelanga ukugubungela iibhondi ze-hydrogen ezomeleleyo kunye ne-van der Waals phakathi kwee-molecule. Ngoko ke, idumba kuphela kodwa ayinyibiliki emanzini. Xa i-substituent ingeniswa kwitsheyina le-molecular, kungekhona nje i-substituent etshabalalisa ikhonkco le-hydrogen, kodwa kunye ne-interchain ye-hydrogen bond iyatshatyalaliswa ngenxa yokutshatyalaliswa kwe-substituent phakathi kwamatyathanga akufutshane. Ubukhulu be-substitute, umgama omkhulu phakathi kweemolekyuli. Umgama mkhulu. Umphumo omkhulu wokutshabalalisa iibhondi ze-hydrogen, i-ether ye-cellulose iba yi-soluble yamanzi emva kokuba i-cellulose lattice yanda kwaye isisombululo singena, senza isisombululo esiphezulu se-viscosity. Xa izinga lokushisa liphakama, i-hydration ye-polymer iyancipha, kwaye amanzi phakathi kwamaketanga akhutshwa ngaphandle. Xa isiphumo sokuchithwa kwamanzi sanele, iamolekyu ziqala ukudibanisa, zenza i-gel yesakhiwo senethiwekhi ye-dimensional emithathu kwaye ihlanganiswe ngaphandle.
Ngokuqhelekileyo, okukhona i-viscosity iphezulu, ingcono isiphumo sokugcina amanzi. Nangona kunjalo, ukuphakama kwe-viscosity kunye nokuphakama kwe-molecular weight, 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, i-viscosity ethile ephakathi kunye nephantsi kodwa i-methyl elungisiweyoi-cellulose etherszibe nokusebenza okugqwesileyo ekuphuculeni amandla esakhiwo sodaka olumanzi.
Ixesha lokuposa: Apr-25-2024