1. Intshayelelo
I-cellulose ether (MC) isetyenziswa ngokubanzi kwishishini lezinto zokwakha kwaye isetyenziswe kwisixa esikhulu.Ingasetyenziswa njenge-retarder, i-arhente yokugcina amanzi, i-thickener kunye ne-adhesive.Kudaka oluqhelekileyo oluxubeneyo olomileyo, udaka lokugquma eludongeni lwangaphandle, udaka oluzilinganisayo, intambo yokuncamathelisa iithayile, iputty yesakhiwo esisebenza kakuhle, iputty enganyangekiyo ngaphakathi kunye nangaphandle eludongeni, udaka oluxubeneyo olungangeni manzi, udaka lwegypsum, i-agent yokucoca kunye nezinye izinto, I-cellulose Ethers idlala indima ebalulekileyo.I-ether ye-cellulose inefuthe elibalulekileyo ekugcinweni kwamanzi, imfuno yamanzi, ukuhambelana, ukuchithwa kunye nokwakhiwa kwenkqubo yodaka.
Kukho iintlobo ezininzi ezahlukeneyo kunye neenkcukacha ze-cellulose ethers.I-cellulose ethers esetyenziswa ngokuqhelekileyo kwintsimi yezinto zokwakha ziquka i-HEC, i-HPMC, i-CMC, i-PAC, i-MHEC, njl., Ezisetyenziswa kwiinkqubo ezahlukeneyo zodaka ngokweempawu zazo.Abanye abantu baye benza uphando ngempembelelo yeentlobo ezahlukeneyo kunye nezixa ezahlukeneyo ze-cellulose ether kwinkqubo yodaka lwesamente.Eli nqaku ligxile kwesi siseko kwaye lichaza indlela yokukhetha iintlobo ezahlukeneyo kunye neenkcukacha ze-cellulose ethers kwiimveliso ezahlukeneyo zodaka.
2 Iimpawu ezisebenzayo ze-cellulose ether kwi-cement mortar
Njengomxube obalulekileyo kwi-powder mortar, i-cellulose ether inemisebenzi emininzi kumdaka.Eyona ndima ibalulekileyo ye-cellulose ether kudaka lwesamente kukugcina amanzi kunye nokujiya.Ukongeza, ngenxa yokusebenzisana kwayo nenkqubo yesamente, inokudlala indima encedisayo ekufakeni umoya, ukubuyisela umva, kunye nokuphucula amandla ebhondi.
Eyona ntsebenzo ibalulekileyo ye-cellulose ether kumdaka kukugcina amanzi.I-ether ye-Cellulose isetyenziswa njenge-admixture ebalulekileyo phantse kuzo zonke iimveliso zodaka, ngokukodwa ngenxa yokugcinwa kwamanzi.Ngokuqhelekileyo, ukugcinwa kwamanzi kwe-cellulose ether kuhambelana ne-viscosity yayo, isixa sokongeza kunye nobukhulu bamasuntswana.
I-ether ye-cellulose isetyenziswa njenge-thickener, kwaye umphumo wayo wokuqina uhambelana neqondo le-etherification, ubungakanani be-particle size, i-viscosity kunye neqondo lokuguqulwa kwe-cellulose ether.Ngokuqhelekileyo, okukhona iqondo eliphezulu le-etherification kunye ne-viscosity ye-cellulose ether, amancinci amancinci, kokukhona kubonakala ngakumbi isiphumo sokuqina.Ngokulungelelanisa iimpawu ezingentla ze-MC, umdaka unokufezekisa ukusebenza ngokufanelekileyo kwe-anti-sagging kunye ne-viscosity engcono kakhulu.
Kwi-ether ye-cellulose, ukuqaliswa kweqela le-alkyl kunciphisa amandla angaphezulu kwesisombululo samanzi esine-cellulose ether, ukwenzela ukuba i-cellulose ether ibe nefuthe lokungenisa umoya kwi-sement mortar.Ukwazisa iibhubhu zomoya ezifanelekileyo kumdaka kuphucula ukusebenza kokwakhiwa kodaka ngenxa "yempembelelo yebhola" yeebhola zomoya.Ngelo xesha, ukungeniswa kwamaqamza omoya kwandisa izinga lokuphuma kodaka.Ngokuqinisekileyo, umthamo wokungena emoyeni kufuneka ulawulwe.Ukunyanzeliswa komoya kakhulu kuya kuba nefuthe elibi kumandla omdaka, kuba iibhubhu zomoya ezinobungozi zinokungeniswa.
2.1 I-ether ye-cellulose iya kulibazisa inkqubo ye-hydration ye-samente, ngaloo ndlela inciphisa ukuseta kunye nokuqina kwenkqubo ye-samente, kunye nokwandisa ixesha lokuvula i-mortar ngokufanelekileyo, kodwa esi siphumo asilungile kumdaka kwimimandla ebandayo.Xa ukhetha i-cellulose ether, imveliso efanelekileyo kufuneka ikhethwe ngokwemeko ethile.Isiphumo sokucutha i-ether ye-cellulose yandiswa ikakhulu ngokunyuka kweqondo le-etherification, idigri yokuguqulwa kunye ne-viscosity.
Ukongezelela, i-cellulose ether, njenge-polymer chain chain chain, inokuphucula ukusebenza kwe-bonding kunye ne-substrate emva kokuba ifakwe kwisistim se-samente phantsi kwesiseko sokugcina ngokupheleleyo umswakama we-slurry.
2.2 Iimpawu ze-cellulose ether kwi-mortar ikakhulu zibandakanya: ukugcinwa kwamanzi, ukuqina, ukwandisa ixesha lokumisela, ukungenisa umoya kunye nokuphucula amandla okudibanisa i-tensile, njl. uzinzo, umxholo wezithako ezisebenzayo (isixa esongezelelweyo), iqondo lokutshintshwa kwe-etherification kunye nokufana kwayo, iqondo lokuguqulwa, umxholo wezinto ezinobungozi, njl. Ngoko ke, xa ukhetha i-MC, i-ether cellulose eneempawu zayo ezinokubonelela ngokusebenza okufanelekileyo kufuneka ibe ikhethwe ngokweemfuno ezithile zemveliso ethile yodaka ukwenzela umsebenzi othile.
3 Iimpawu ze-cellulose ether
Ngokuqhelekileyo, imiyalelo yemveliso ebonelelwa ngabavelisi be-cellulose ether iya kubandakanya ezi zikhombisi zilandelayo: ukubonakala, i-viscosity, i-degree of group substitution, i-fineness, umxholo wezinto ezisebenzayo (ubunyulu), umxholo womswakama, iindawo ezicetyiswayo kunye ne-dosage, njl. Ezi zalathisi zokusebenza zingabonakalisa inxalenye yendima ye-cellulose ether, kodwa xa kuthelekiswa kunye nokukhetha i-cellulose ether, ezinye iinkalo ezinjengokwakheka kweekhemikhali, idigri yokuguqulwa, idigri ye-etherification, umxholo we-NaCl, kunye nexabiso le-DS kufuneka kwakhona ihlolwe.
3.1 I-Viscosity ye-cellulose ether
I-viscosity ye-cellulose ether ichaphazela ukugcinwa kwamanzi, ukuqina, ukubuyiswa kunye neminye imiba.Ngoko ke, luphawu olubalulekileyo lokuhlola kunye nokukhetha i-cellulose ether.
Ngaphambi kokuxoxa nge-viscosity ye-cellulose ether, kufuneka kuqatshelwe ukuba kukho iindlela ezine eziqhelekileyo ezisetyenziswayo zokuvavanya i-viscosity ye-cellulose ether: i-Brookfield, i-Hakke, i-Höppler, kunye ne-viscometer ejikelezayo.Izixhobo, ugxininiso lwesisombululo kunye nokusingqongileyo kovavanyo olusetyenziswa ngeendlela ezine zahlukile, ngoko ke iziphumo zesisombululo esifanayo seMC esivavanywa ngeendlela ezine nazo zahluke kakhulu.Nangona isisombululo esifanayo, usebenzisa indlela efanayo, ukuvavanya phantsi kweemeko ezahlukeneyo zokusingqongileyo, i-viscosity
Iziphumo nazo ziyahluka.Ngoko ke, xa uchaza i-viscosity ye-cellulose ether, kuyimfuneko ukubonisa ukuba yeyiphi indlela esetyenziselwa ukuvavanya, ukugxilwa kwesisombululo, i-rotor, isantya esijikelezayo, ukuvavanya ukushisa kunye nomswakama kunye nezinye iimeko zokusingqongileyo.Eli xabiso le-viscosity lixabisekile.Akunantsingiselo ukuthetha ngokulula "yintoni i-viscosity ye-MC ethile".
3.2 Uzinzo lweMveliso yeCellulose Ether
I-cellulose ethers ziyaziwa ukuba zisengozini yokuhlaselwa yi-cellulosic molds.Xa i-fungus ikhukulisa i-ether ye-cellulose, iqala ukuhlasela iyunithi ye-glucose engenamandla kwi-ether ye-cellulose.Njengekhompawundi yomgca, xa iyunithi ye-glucose itshatyalalisiwe, yonke ikhonkco ye-molecular iphukile, kwaye i-viscosity yemveliso iya kuhla ngokukhawuleza.Emva kokuba iyunithi ye-glucose i-etherified, i-mold ayiyi kutshabalalisa ngokulula ikhonkco le-molecular.Ngoko ke, iqondo eliphezulu le-etherification substitution (ixabiso le-DS) ye-cellulose ether, iphezulu ukuzinza kwayo kuya kuba.
3.3 Isiqulatho esisebenzayo se-cellulose ether
Okuphezulu umxholo wezithako ezisebenzayo kwi-cellulose ether, iphezulu indleko yokusebenza kwemveliso, ukwenzela ukuba iziphumo ezingcono zifezekiswe kunye nedosi efanayo.Isithako esisebenzayo kwi-cellulose ether yi-cellulose ether molekyuli, into ephilayo.Ngoko ke, xa uphonononga umxholo osebenzayo we-cellulose ether, unokubonakaliswa ngokungathanga ngqo ngexabiso lomlotha emva kokubala.
3.4 Umxholo weNaCl kwi-cellulose ether
I-NaCl iyimveliso engenakuphepheka ekuveliseni i-cellulose ether, efuna ngokubanzi ukususwa ngokuhlamba okuninzi, kunye namaxesha amaninzi okuhlamba, i-NaCl encinci ihlala.I-NaCl yingozi eyaziwayo kwi-corrosion yentsimbi yentsimbi kunye ne-mesh wire mesh.Ngoko ke, nangona unyango lokuhlambela i-NaCl ngamaxesha amaninzi lunokunyusa iindleko, xa ukhetha iimveliso ze-MC, kufuneka sizame konke okusemandleni ethu ukukhetha iimveliso ezinomxholo ophantsi we-NaCl.
4 Imigaqo yokukhetha i-cellulose ether kwiimveliso ezahlukeneyo zodaka
Xa ukhetha i-cellulose ether kwiimveliso zodaka, okokuqala, ngokwenkcazo yencwadana yemveliso, khetha izibonakaliso zayo zokusebenza (ezifana ne-viscosity, i-degree of etherification substitution, umxholo osebenzayo wezinto, umxholo we-NaCl, njl.) Iimpawu zokusebenza kunye nokukhetha imigaqo
4.1 Inkqubo yodaka olubhityileyo
Ukuthatha udaka lokutyabeka lwenkqubo yokutyabeka ebhityileyo njengomzekelo, ekubeni udaka lwe-plastering ludibanisa ngokuthe ngqo nokusingqongileyo kwangaphandle, umphezulu ulahlekelwa ngamanzi ngokukhawuleza, ngoko ke izinga eliphezulu lokugcinwa kwamanzi liyafuneka.Ngokukodwa ngexesha lokwakhiwa kwehlobo, kufuneka ukuba udaka lukwazi ukugcina umswakama kwiqondo lokushisa eliphezulu.Kuyafuneka ukuba ukhethe i-MC enezinga eliphezulu lokugcinwa kwamanzi, elinokuthi liqwalaselwe ngokubanzi ngeendlela ezintathu: i-viscosity, ubukhulu be-particle size, kunye nesixa esongezelelweyo.Ngokuqhelekileyo, phantsi kweemeko ezifanayo, khetha i-MC ene-viscosity ephezulu, kwaye uqwalasela iimfuno zokusebenza, i-viscosity akufanele ibe phezulu kakhulu.Ngoko ke, i-MC ekhethiweyo kufuneka ibe nesantya esiphezulu sokugcinwa kwamanzi kunye ne-viscosity ephantsi.Phakathi kweemveliso ze-MC, i-MH60001P6 njl.
4.2 Udaka lokutyabeka olusekelwe kwisamente
Udaka lokutyabeka lufuna ukufana okuhle kodaka, kwaye kulula ukulufaka ngokulinganayo xa utyabeka.Kwangaxeshanye, ifuna ukusebenza kakuhle kokuchasana nokudodobala, amandla okumpompa aphezulu, ulwelo kunye nokusebenza kakuhle.Ngoko ke, i-MC ene-viscosity ephantsi, ukusabalalisa ngokukhawuleza kunye nophuhliso oluhambelanayo (iincinci ezincinci) kumdaka we-samente ukhethiweyo.
Ekwakhiweni kwe-adhesive tile, ukwenzela ukuba kuqinisekiswe ukhuseleko kunye nokusebenza okuphezulu, kufunwa ngokukodwa ukuba udaka lunexesha elide lokuvula kunye nokusebenza okungcono kwe-anti-slide, kwaye ngexesha elifanayo lifuna ukudibanisa okulungileyo phakathi kwe-substrate kunye ne-tile. .Ke ngoko, izinto zokuncamathelisa iithayile zineemfuno eziphezulu kakhulu zeMC.Nangona kunjalo, i-MC ngokubanzi inomxholo ophezulu kwizinto zokuncamathelisa iithayile.Xa ukhetha i-MC, ukuhlangabezana nemfuneko yexesha elide lokuvula, i-MC ngokwayo kufuneka ibe nesantya esiphezulu sokugcinwa kwamanzi, kwaye izinga lokugcinwa kwamanzi lifuna i-viscosity efanelekileyo, inani elongezelelweyo kunye nobukhulu be-particle.Ukuze kuhlangatyezwane nokusebenza kakuhle kokuchasana nokutyibilika, isiphumo esityebileyo seMC silungile, ukuze udaka lube nokumelana okuqinileyo okuthe nkqo, kwaye ukusebenza kokuqina kuneemfuno ezithile kwi-viscosity, isidanga se-etherification kunye nobungakanani bamasuntswana.
4.4 Udaka lwasemhlabeni oluzilinganisa ngokwalo
I-self-leveling mortar ineemfuno eziphezulu ekusebenzeni komgangatho wodaka, ngoko ke kufanelekile ukukhetha i-low-viscosity cellulose ether iimveliso.Ekubeni ukuzilinganisa kufuna ukuba udaka oluxutywe ngokulinganayo lukwazi ukulungelelaniswa ngokuzenzekelayo emhlabeni, ukumanzi kunye nokumpompa kuyafuneka, ngoko umlinganiselo wamanzi kwizinto eziphathekayo mkhulu.Ukuze kuthintelwe ukopha, i-MC iyadingeka ukulawula ukugcinwa kwamanzi kumphezulu kunye nokubonelela nge-viscosity ukukhusela i-sedimentation.
4.5 Udaka lwemasonry
Ngenxa yokuba udaka lwemasonry lunxibelelana ngokuthe ngqo nomphezulu we-masonry, ngokuqhelekileyo lulwakhiwo olungqingqwa.Udaka lufuneka ukuba lube nokusebenza okuphezulu kunye nokugcinwa kwamanzi, kwaye kunokuqinisekisa amandla okudibanisa kunye ne-masonry, ukuphucula ukusebenza, kunye nokwandisa ukusebenza kakuhle.Ngoko ke, i-MC ekhethiweyo kufuneka ikwazi ukunceda udaka ukuphucula ukusebenza okungentla, kunye ne-viscosity ye-cellulose ether akufanele ibe phezulu kakhulu.
4.6 Udaka lwe-insulation
Ekubeni i-thermal insulation slurry isetyenziswa kakhulu ngesandla, kuyafuneka ukuba i-MC ekhethiweyo inokunika udaka olusebenzayo, ukusebenza kakuhle kunye nokugcinwa kwamanzi okugqwesileyo.I-MC kufuneka ibe neempawu ze-viscosity ephezulu kunye ne-air-entrainment ephezulu.
5 Isiphelo
Imisebenzi ye-cellulose ether kudaka lwesamente kukugcina amanzi, ukuqina, ukunyanzeliswa komoya, ukuncipha kunye nokuphucula amandla e-tensile bond, njl.
Ixesha lokuposa: Jan-30-2023