Iimveliso zesamente, ezifana nesamente, udaka, nezinye izinto zokwakha, zisetyenziswa ngokubanzi kwizakhiwo zale mihla. I-cellulose ethers (efana ne-hydroxypropyl methylcellulose (HPMC), i-hydroxyethyl methylcellulose (HEMC), njl.) zizongezo ezibalulekileyo ezinokuphucula kakhulu ukusebenza kweemveliso zesamente. Ukuze ufezekise ezi mpawu zibalaseleyo, kubalulekile ukulawula nokulawula ukusebenza kwe-cellulose ethers.
1. Iimpawu ezisisiseko kunye nemisebenzi ye-cellulose ethers
I-cellulose ethers yiklasi yeekhemikhali eziphuma kwi-cellulose yendalo, apho iqela le-hydroxyl litshintshwa ngokuyinxenye liqela le-ether ngokusebenzisa i-etherification reaction. Iindidi ezahlukeneyo ze-cellulose ethers zinokuthi zenziwe ngokohlobo kunye nenani labatshintshi, kwaye uhlobo ngalunye lunendima eyahlukileyo kwiimveliso zesamente.
I-viscosity ye-cellulose ethers:
I-viscosity ye-cellulose ethers ichaphazela ngokuthe ngqo i-rheology kunye nokuzinza kwe-cement paste. I-high-viscosity cellulose ethers inokuphucula ukugcinwa kwamanzi kunye namandla okubopha intlama, kodwa inokunciphisa ukumanzi kwayo. I-low-viscosity cellulose ethers inceda ukuphucula ukusebenza kunye ne-fluidity.
Isidanga sokutshintshwa (DS) kunye nemolar substitution (MS):
Iqondo lokutshintshwa kunye nokutshintshwa kwe-molar ye-cellulose ethers inquma ukunyibilika kwayo kunye ne-viscosity yesisombululo. Iqondo eliphezulu lokutshintshwa kunye nokutshintshwa kwe-molar ephezulu kunokuphucula ukugcinwa kwamanzi kunye nokuzinza kwe-cellulose ethers.
Ukunyibilika kwe-cellulose ethers:
Izinga lokuchithwa kunye ne-solubility ye-cellulose ethers ichaphazela ukufana kwe-cement paste. I-cellulose ethers ene-solubility efanelekileyo inokwenza isisombululo esifanayo ngokukhawuleza, ngaloo ndlela iqinisekisa ukufana kunye nokuzinza kwe-paste.
2. Khetha ii-ether ze-cellulose ezifanelekileyo
Iimeko zesicelo ezahlukeneyo zineemfuno ezahlukeneyo zokusebenza ze-cellulose ethers. Ukukhetha uhlobo oluchanekileyo kunye neenkcukacha ze-cellulose ether kunokuphucula kakhulu ukusebenza kweemveliso zesamente:
Izibophelelo:
Kwizicelo ezifana ne-adhesives tile kunye ne-plaster mortars, i-high-viscosity cellulose ethers (efana ne-HPMC) inokubonelela ngokubambelela okungcono kunye nokumanzisa okungapheliyo, ngaloo ndlela kuphuculwe ukusebenza kokwakhiwa kunye namandla okugqibela okudibanisa.
Izinto zokugcina amanzi:
Kwimizila yokuzimela kunye ne-cement-based adhesives tile, i-cellulose ethers enokugcinwa kwamanzi aphezulu (njenge-HEMC) iyadingeka. Ukugcinwa kwamanzi aphezulu kunceda ukuthintela ukulahleka kwamanzi kwangaphambi kwexesha, ngaloo ndlela kuqinisekisa ukusabela okwaneleyo kwe-hydration kunye nexesha elide lokusebenza.
Imathiriyeli yokuqinisa:
I-cellulose ethers esetyenziselwa ukunyusa amandla emveliso yesamente kufuneka ibe ne-dispersibility efanelekileyo kunye ne-viscosity ephakathi ukunyusa ukufana kunye namandla e-matrix.
3. Lungiselela indlela yokudibanisa
Ukulawula indlela yokongeza ye-cellulose ether kwiimveliso zesamente kubalulekile ukunyusa ukusebenza kwayo. Ezi zilandelayo ziindlela ezininzi eziqhelekileyo zokulungiselela:
Indlela yokuxutywa kwangaphambili:
Xuba i-ether cellulose kunye nezinye izinto zomgubo owomileyo kwangaphambili. Le ndlela inokuphepha ukubunjwa kwe-agglomeration ye-cellulose ether emva kokunxibelelana ngokuthe ngqo namanzi, ngaloo ndlela iqinisekisa ukusasazeka kwayo okufanayo kwi-slurry.
Indlela yokuxuba umanzi:
Yongeza i-cellulose ether kwi-slurry yesamente ngokuthe ngcembe. Le ndlela ifanelekile kwimeko apho i-cellulose ether ichitheka ngokukhawuleza kwaye inceda ukwenza ukumiswa okuzinzile.
Indlela yokudibanisa ngokwahlukeneyo:
Kwinkqubo yokulungiselela i-sement slurry, ukongeza i-cellulose ether kumacandelo kunokuqinisekisa ukuhanjiswa kwayo okufanayo kuyo yonke inkqubo yokulungiselela kunye nokunciphisa i-agglomeration.
4. Lawula izinto zangaphandle
Izinto zangaphandle ezifana neqondo lokushisa, ixabiso le-pH, kunye nezinga lokuvuselela linempembelelo enkulu ekusebenzeni kwe-cellulose ether.
Ulawulo lobushushu:
I-solubility kunye ne-viscosity ye-cellulose ether ivakalelwa kakhulu kubushushu. Amaqondo obushushu aphezulu anceda i-cellulose ether ukuba inyibilike ngokukhawuleza, kodwa inokubangela ukuba i-viscosity yesisombululo yehle. Iqondo lobushushu kufuneka lihlengahlengiswe ngokwemeko yesicelo esithile ukuze kuqinisekiswe ukusebenza kakuhle kunye nokusebenza.
Uhlengahlengiso lwe-pH: Ixabiso le-pH le-samente ye-samente lihlala lihlala kuluhlu oluphezulu lwe-alkaline, ngelixa i-solubility kunye ne-viscosity ye-cellulose ether iguquguquka ngokutshintsha kwexabiso le-pH. Ukulawula ixabiso le-pH ngaphakathi koluhlu olufanelekileyo kunokuzinzisa ukusebenza kwe-cellulose ether.
Izinga lokuvuselela: Izinga lokuvuselela lichaphazela umphumo wokusasazeka kwe-cellulose ether kwi-samente paste. Izinga eliphezulu kakhulu lokuzamisa kunokukhokelela kwintshayelelo yomoya kunye nokudityaniswa kwe-cellulose ether, ngelixa isantya esiphakathi sokushukumisa sinceda ukusasaza ngokulinganayo kunye nokunyibilikisa i-cellulose ether.
5. Uhlalutyo lwemeko kunye neengcebiso ezisebenzayo
Ngohlalutyo lwangempela, sinokuqonda ngakumbi isicelo kunye nesicwangciso sokuphucula i-cellulose ether kwiimveliso ezahlukeneyo zesamente:
I-adhesive tile adhesive-high-performance adhesive: Xa inkampani yayivelisa i-adhesive tile adhesive high-performance, kwafunyaniswa ukuba ukugcinwa kwamanzi kwimveliso yokuqala kwakunganelanga, okubangelwa ukuhla kwamandla okubambisana emva kokwakhiwa. Ngokuzisa i-HEMC ephezulu yokugcina amanzi kunye nokulungelelanisa inani layo lokongeza kunye nendlela yokongeza (usebenzisa indlela ye-premixing), ukugcinwa kwamanzi kunye nokuqina kokubambisana kwe-adhesive tile kuphuculwe ngempumelelo.
Imathiriyeli yomgangatho wokuzilinganisa: Isixhobo somgangatho wokuzilinganisa esisetyenziswa kwiprojekthi ethile sasinolwelo olulambathayo kunye nokuthe tyaba komphezulu ombi emva kokwakhiwa. Ngokukhetha i-HPMC ye-viscosity ephantsi kunye nokwandisa izinga lokuvuselela kunye nokulawula ubushushu, umbane kunye nokusebenza kokwakhiwa kwe-slurry kuphuculwe, okwenza umgangatho wokugqibela ube lula.
Ukulawula ukusebenza kwe-cellulose ether kwiimveliso zesamente ngundoqo ekuphuculeni ukusebenza kwezinto kunye nomgangatho wokwakha. Ngokukhetha uhlobo olufanelekileyo lwe-cellulose ether, ukulungelelanisa indlela yokongeza, kunye nokulawula izinto ezichaphazelayo zangaphandle, iimpawu eziphambili zeemveliso zesamente ezifana nokugcinwa kwamanzi, ukunamathela, kunye nokukhutshwa kwamanzi kunokuphuculwa kakhulu. Kwizicelo ezisebenzayo, kuyimfuneko ukunyusa ngokuqhubekayo kunye nokulungelelanisa ukusetyenziswa kwe-cellulose ether ngokweemfuno ezithile kunye neemeko zesicelo ukufezekisa iziphumo ezilungileyo.
Ixesha lokuposa: Jun-26-2024