Gxininisa kwiCellulose ethers

HEC kulwakhiwo

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.

HEC kulwakhiwo

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
Incoko ka-WhatsApp kwi-Intanethi!