Kwimveliso yezinto zokwakha, ingakumbi i-dry powder mortar,i-cellulose etherIdlala indima ebalulekileyo, ingakumbi ekuvelisweni kwe-mortar ekhethekileyo (mortar eguquliweyo), yinxalenye ebalulekileyo. Indima ebalulekileyo ye-ether ye-cellulose enyibilikayo emanzini kwi-mortar ikakhulu kubuchule bayo obuhle bokugcina amanzi. Isiphumo sokugcina amanzi se-cellulose ether sixhomekeke ekufunxeni kwamanzi kwi-base malear, ukwakheka kwe-mortar, ubukhulu be-mortar malear, imfuno yamanzi ye-mortar, kunye nexesha lokuseta lezinto zokuseta.
Iimortar ezininzi ezenziwe ngomthi kunye neplasta azibambi kakuhle amanzi, kwaye amanzi kunye ne-slurry ziya kwahluka emva kwemizuzu embalwa yokuma. Ukugcinwa kwamanzi kukusebenza okubalulekileyo kwe-methyl cellulose ether, kwaye kukwangumsebenzi abavelisi abaninzi bemortar yomxube owomileyo basekhaya, ingakumbi abo bakwimimandla esemazantsi enamaqondo obushushu aphezulu, abawunika ingqalelo. Izinto ezichaphazela isiphumo sokugcinwa kwamanzi semortar yomgubo owomileyo ziquka ubungakanani bokongeza, i-viscosity, ubuncinci bee-particles, kunye nobushushu bendawo yokusetyenziswa.
Ukugcinwa kwamanzii-cellulose etherngokwayo ivela ekunyibilikeni nasekuphelelweni kwamanzi kwe-cellulose ether ngokwayo. Njengoko sonke sisazi, nangona i-cellulose molecular chain inenani elikhulu lamaqela e-OH anokufuma kakhulu, ayinyibiliki emanzini, kuba isakhiwo se-cellulose sinezinga eliphezulu lekristalinity. Amandla okufuma kwamaqela e-hydroxyl kuphela awanelanga ukugubungela iibhondi ze-hydrogen ezinamandla kunye namandla e-van der Waals phakathi kweemolekyuli. Ke ngoko, iyakhukhumala kuphela kodwa ayinyibiliki emanzini. Xa i-substituent ingeniswa kwi-molecular chain, ayisiyo-substituent kuphela etshabalalisa i-hydrogen chain, kodwa ne-interchain hydrogen bond iyatshatyalaliswa ngenxa yokudibana kwe-substituent phakathi kwee-chain ezikufutshane. Okukhona i-substituent inkulu, kokukhona umgama phakathi kweemolekyuli umkhulu. Okukhona umgama umkhulu. Okukhona isiphumo sokutshabalalisa iibhondi ze-hydrogen siba sikhulu, i-cellulose ether iba yi-water-soluble emva kokuba i-cellulose lattice yanda kwaye isisombululo singena, senza isisombululo esine-viscosity ephezulu. Xa ubushushu bunyuka, ukufuma kwe-polymer kuba buthathaka, kwaye amanzi phakathi kwee-chain ayakhutshwa. Xa isiphumo sokuphelelwa ngamanzi emzimbeni sanele, iimolekyuli ziqala ukuhlangana, zenze ijeli yesakhiwo senethiwekhi enamacala amathathu kwaye zigoqwe.
Ngokubanzi, okukhona i-viscosity iphezulu, kokukhona isiphumo sokugcina amanzi singcono. Nangona kunjalo, okukhona i-viscosity iphezulu kwaye ubunzima be-molecular buphezulu, ukwehla okulinganayo kokunyibilika kwayo kuya kuba nefuthe elibi kumandla kunye nokusebenza kolwakhiwo lwe-mortar. Okukhona i-viscosity iphezulu, kokukhona isiphumo sokutyeba sibonakala ngakumbi kwi-mortar, kodwa ayilingani ngokuthe ngqo. Okukhona i-viscosity iphezulu, kokukhona i-mortar emanzi iya kuba ne-viscous ngakumbi, oko kukuthi, ngexesha lokwakhiwa, ibonakaliswa njengokunamathela kwi-scraper kunye nokunamathela okuphezulu kwi-substrate. Kodwa akuncedi ukwandisa amandla olwakhiwo lwe-mortar emanzi ngokwayo. Ngexesha lokwakhiwa, ukusebenza kwe-anti-sag akubonakali. Ngokuchasene noko, i-viscosity ethile ephakathi nephantsi kodwa i-methyl eguquliweyoii-ether ze-cellulosezisebenza kakuhle kakhulu ekuphuculeni amandla olwakhiwo lwesamente esimanzi.
Ixesha leposi: Epreli-25-2024