Focus on Cellulose ethers

Yiziphi izici ze-methylcellulose?

1. Ingancibilika uma ishisa ngaphezu kuka-200 ° C, futhi okuqukethwe komlotha cishe ku-0.5% uma kushisiwe, futhi akuthathi hlangothi ngemva kokwenziwa udaka ngamanzi. Ngokuqondene ne-viscosity yayo, kuya ngezinga layo le-polymerization.

2. I-Solubility emanzini ilingana ngokuphambene nezinga lokushisa, izinga lokushisa eliphezulu line-solubility ephansi, izinga lokushisa eliphansi line-solubility ephezulu.

3. Incibilika engxubeni yamanzi nezincibilikizi eziphilayo njenge-methanol, i-ethanol, i-ethylene glycol, i-glycerin ne-acetone.

4. Uma usawoti wensimbi noma i-electrolyte ephilayo ikhona esixazululweni saso esinamanzi, isixazululo sisengahlala sizinzile. Lapho i-electrolyte yengezwa ngenani elikhulu, ijeli noma imvula izovela.

5. Umsebenzi ongaphezulu. Ama-molecule ayo aqukethe amaqembu e-hydrophilic namaqembu e-hydrophobic, ane-emulsification, ukuvikelwa kwe-colloid nokuzinza kwesigaba.

6. I-Gelation eshisayo. Lapho isixazululo esinamanzi sikhuphukela ekushiseni okuthile (ngaphezu kwezinga lokushisa lejeli), lizoguqubala kuze kube yilapho lijikela noma lihlehla, okwenza ikhambi lilahlekelwe yi-viscosity yalo, kodwa lingabuyela esimweni salo sasekuqaleni ngokupholisa. Izinga lokushisa lapho i-gelation kanye nemvula kwenzeka khona incike ohlotsheni lomkhiqizo, ukugxila kwesixazululo kanye nezinga lokushisa.

7. Inani le-pH lizinzile. I-viscosity emanzini ayithinteki kalula nge-asidi ne-alkali. Ngemva kokwengeza inani elithile le-alkali, kungakhathaliseki izinga lokushisa eliphezulu noma izinga lokushisa eliphansi, ngeke libangele ukubola noma ukuhlukana kweketango.

8. Isixazululo singakha ifilimu esobala, eqinile futhi enwebekayo ebusweni ngemva kokumisa. Ingakwazi ukumelana nezinyibilikisi eziphilayo, amafutha kanye namafutha ahlukahlukene. Ngeke ijike ibe phuzi lapho ivezwa ekukhanyeni, futhi ngeke ibonakale imifantu enoboya. Ingancibilika emanzini futhi. Uma i-formaldehyde yengezwa esixazululweni noma ngemva kokwelashwa nge-formaldehyde, ifilimu ayincibiliki emanzini kodwa isavuvukala kancane.

9. Ukujiya. Ingakwazi ukujiya amasistimu amanzi kanye ne-non-aqueous, futhi inokusebenza okuhle kwe-anti-sag.

10. Ukwanda kwe-viscosity. Isixazululo saso esinamanzi sinamandla aqinile okubumbana, angathuthukisa amandla okubumbana usimende, i-gypsum, upende, i-pigment, iphepha lodonga nezinye izinto.

11. Udaba olumisiwe. Ingasetshenziselwa ukulawula ukujiya kanye nemvula yezinhlayiya eziqinile.

12. I-colloid yokuzivikela ukuze ikhulise ukuzinza kwayo. Ingavimbela ukuhlangana kanye nokuhlangana kwamaconsi nezimibalabala, futhi ivimbele imvula ngempumelelo.


Isikhathi sokuthumela: Jan-29-2023
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