I-Hydroxyethyl Cellulose (HEC) kuLwakhiwo: IsiKhokelo esiBanzi
1. Intshayelelo ngeHydroxyethyl Cellulose (HEC)
I-Hydroxyethyl Cellulose(HEC) i-non-ionic, i-polymer e-soluble yamanzi ephuma kwi-cellulose, i-polysaccharide yendalo efumaneka kwiindonga zeeseli zesityalo. Ngokuguqulwa kweekhemikhali, amaqela e-hydroxyl kwi-cellulose athatyathelwa indawo ngamaqela e-hydroxyethyl, ephucula ukunyibilika kwawo kunye nokuzinza kwizisombululo ezinamanzi. Olu tshintsho lwenza i-HEC ibe yinto eyongeziweyo kwizinto zokwakha, inikezela ngeempawu ezizodwa ezifana nokugcinwa kwamanzi, ukuqina, kunye nokuphucula ukusebenza.
1.1 Ubume beMichiza kunye neMveliso
I-HECyenziwe ngokuphatha i-cellulose nge-ethylene oxide phantsi kweemeko ze-alkaline. I-degree of substitution (DS), ngokuqhelekileyo phakathi kwe-1.5 kunye ne-2.5, imisela inani lamaqela e-hydroxyethyl ngeyunithi ye-glucose, echaphazela ukunyibilika kunye ne-viscosity. Inkqubo yokuvelisa ibandakanya i-alkalization, i-etherification, i-neutralization, kunye nokomisa, okubangelwa umgubo omhlophe okanye omhlophe.
2. IiPropati ze-HEC eziNxulumene noLwakhiwo
2.1 Ugcino lwamanzi
I-HEC yenza isisombululo se-colloidal emanzini, ukudala ifilimu ekhuselayo ejikeleze amasuntswana. Oku kucothisa ukuvela kwamanzi abe ngumphunga, kubalulekile kwi-samente hydration kunye nokuthintela ukomiswa kwangaphambi kwexesha kwiidaka kunye ne-plasters.
2.2 Ukutyebisa kunye noLawulo lweViscosity
I-HEC yonyusa i-viscosity yemixube, ibonelela ngokumelana ne-sag kwizicelo ezithe nkqo njengezinto zokuncamathelisa iithayile. Ukuziphatha kwayo kwe-pseudoplastic kuqinisekisa ukukhululeka kwesicelo phantsi koxinzelelo lwe-shear (umzekelo, i-troweling).
2.3 Ukuhambelana nozinzo
Njengepolymer engeyiyo i-ionic, i-HEC ihlala izinzile kwiindawo eziphezulu ze-pH (umzekelo, iinkqubo ze-cementitious) kwaye inyamezela i-electrolyte, ngokungafaniyo ne-ionic thickeners njengeCarboxymethyl Cellulose (CMC).
2.4 Ukuzinza kweThermal
I-HEC igcina ukusebenza kuluhlu olubanzi lobushushu, iyenza ifaneleke kwizicelo zangaphandle ezivezwe kwiimozulu ezahlukeneyo.
3. Izicelo zeHEC kulwakhiwo
3.1 Izinto zokuncamathelisa iiThayile kunye neeGrouts
I-HEC (0.2-0.5% ngesisindo) yandisa ixesha elivulekileyo, ivumela ukulungiswa kwe-tile ngaphandle kokunciphisa ukunamathela. Yandisa ukomelela kwebhondi ngokunciphisa ukufunxwa kwamanzi kwi-substrates ene-porous.
3.2 Udaka oluSekwe kwisamente kunye neeRenders
Ekunikezeni kunye nokulungiswa kwee-mortars, i-HEC (0.1-0.3%) iphucula ukusebenza, iyanciphisa ukuqhekeka, kwaye iqinisekisa ukunyanga okufanayo. Ukugcinwa kwayo kwamanzi kubalulekile kwizicelo zebhedi encinci.
3.3 Iimveliso zeGypsum
I-HEC (0.3-0.8%) kwi-gypsum plasters kunye ne-joint compounds controls setting time kunye nokunciphisa ukuqhekeka kwe-shrinkage. Iphucula ukusasazeka kunye nokugqitywa komphezulu.
3.4 Iipeyinti kunye neeNgqungquthela
Kwipeyinti yangaphandle, i-HEC isebenza njenge-thickener kunye ne-rheology modifier, ikhusela ukuthontsiza kunye nokuqinisekisa ukugubungela. Ikwazinzisa ukusasazeka kwebala.
3.5 IiCompounds zokuZilinganisa
I-HEC ibonelela ngolawulo lwe-viscosity, ivumela imigangatho yokuzimela ukuba ihambe kakuhle ngelixa ikhusela i-particle sedimentation.
3.6 Ukugqunywa kwaNgaphandle kunye neeNkqubo zokuQeda (EIFS)
I-HEC iphucula ukubambelela kunye nokuqina kweengubo zesiseko ze-polymer-modified kwi-EIFS, ukuchasana nemozulu kunye noxinzelelo lomatshini.
4. Iinzuzo zeHEC kulwakhiwoIzinto eziphathekayo
- Ukusetyenzwa:Iququzelela ukuxuba okulula kunye nokusetyenziswa.
- Ukuncamathela:Ukuphucula amandla ebhondi kwi-adhesives kunye neengubo.
- Ukuqina:Inciphisa ukucutheka kunye nokuqhekeka.
- Ukuxhathisa kweSag:Iyimfuneko kwizicelo ezithe nkqo.
- Ukusebenza kakuhle kweendleko:Idosi ephantsi (0.1–1%) inika uphuculo olubonakalayo lomsebenzi.
5. Ukuthelekiswa nezinye ii-Cellulose Ethers
- I-Methyl Cellulose (MC):Ukuzinza kancinci kwiindawo eziphezulu ze-pH; iijeli kumaqondo obushushu aphakamileyo.
- I-Carboxymethyl Cellulose (CMC):Ubume be-Ionic bunciphisa ukuhambelana nesamente. Ubume be-HEC obungeyo-ionic bubonelela ngokusebenza ngokubanzi.
6. Iingqwalasela zobuGcisa
6.1 Umthamo kunye nokuxuba
Idosi efanelekileyo iyahluka ngokwesicelo (umzekelo, i-0.2% ye-adhesives ye-tile vs. 0.5% ye-gypsum). Ukudibanisa kwangaphambili i-HEC kunye nezithako ezomileyo zithintela ukudibanisa. Ukucheba okuphezulu kuqinisekisa ukusasazwa okufanayo.
6.2 Imiba yokusingqongileyo
- Ubushushu:Amanzi abandayo acothisa ukunyibilika; amanzi afudumeleyo (≤40 ° C) ayayikhawulezisa.
- pH:Izinzile kwi-pH 2-12, ilungele izinto zokwakha ze-alkaline.
6.3 Ugcino
Gcina kwiimeko ezipholileyo, ezomileyo ukuthintela ukufunxa ukufuma kunye ne-caking.
7. Imingeni kunye neMida
- Ixabiso:Iphezulu kune-MC kodwa ithethelelwe ngokusebenza.
- Ukusebenzisa ngokugqithisileyo:I-viscosity egqithisileyo inokuthintela isicelo.
- Ukuncipha:Isenokulibazisa useto ukuba ayilungelelaniswanga ne-accelerators.
8. Imizekelo
- UFakelo lweThayile ekwinqanaba eliphezulu:I-HEC-based adhesives yenza ukuba ixesha elivulekileyo elongeziweyo labasebenzi baseDubai Burj Khalifa, ukuqinisekisa ukubekwa okuchanekileyo phantsi kobushushu obuphezulu.
- Ubuyiselo lweNdalo yeSakhiwo:Udaka olulungisiweyo lwe-HEC lugcine imfezeko yolwakhiwo kuvuselelo lwecathedral yaseYurophu ngokuthelekisa iipropati zemathiriyeli zembali.
9. Imizila yekamva kunye nezinto ezintsha
- I-HEC elungele i-Eco:Uphuhliso lwamabanga e-biodegradable ukusuka kwimithombo ye-cellulose ezinzileyo.
- Iipolima eziHybrid:Ukudibanisa i-HEC kunye neepolima zokwenziwa ukwenzela ukomelezwa kokuqhekeka kokuqhekeka.
- I-Smart Rheology:Ubushushu obuphendula i-HEC kwi-viscosity eguquguqukayo kwiimeko zezulu ezigqithisileyo.
I-HECUbuninzi bemisebenzi buyenza ibaluleke kakhulu kulwakhiwo lwangoku, ukulinganisa ukusebenza, iindleko, kunye nozinzo. Njengoko uphuhliso luqhubeka, iHEC iya kudlala indima ebalulekileyo ekuqhubeleni phambili imathiriyeli yokwakha ehlala ixesha elide, esebenzayo.
Ixesha lokuposa: Mar-26-2025