Focus on Cellulose ethers

He aha te rereketanga o te hydroxyethyl cellulose me te ethyl cellulose

He maha nga tangata kaore e mohio ki te rereketanga o te hydroxyethyl cellulose me te ethyl cellulose. Ko te Hydroxyethyl cellulose me te ethyl cellulose he matū rereke e rua. Kei a ratou nga ahuatanga e whai ake nei.

1 Hydroxyethyl cellulose:
Ka rite ki te surfactant kore-katote, hei taapiri atu ki te whakapakeke, ki te whakatarewa, ki te here, ki te rewa, ki te hanga kiriata, ki te whakamarara, ki te pupuri i te wai me te whakarato colloids whakamarumaru, kei a ia ano nga ahuatanga e whai ake nei:
1. He wairewa te HEC i roto i te wai wera, i te wai matao ranei, karekau e heke i te pāmahana teitei, te koropuputanga ranei, na te mea he maha nga ahuatanga o te whakarewatanga me nga ahuatanga pokey, me te waiariki kore;
2. Karekau he katote ka taea te noho tahi me te maha atu o nga momo polymers wairewa-wairewa, surfactants me nga tai, a he pai rawa atu te whakamaarata colloidal kei roto i nga otinga electrolyte teitei;
3. Ko te kaha o te pupuri i te wai e rua ake te teitei o te methyl cellulose, a he pai ake te whakahaere o te rere.
4. Ka whakatauritea ki te methyl cellulose me te hydroxypropyl methyl cellulose, ko te kaha marara o HEC te mea kino rawa atu, engari ko te colloid tiaki te kaha kaha.

2 Ethyl cellulose
He etera cellulose kore-katote e kore e rewa i roto i te wai engari ka whakarewahia i roto i nga whakarewa waro. Kei a ia nga ahuatanga e whai ake nei:

1. Ehara i te mea ngawari ki te tahu.
2. He pai te pai o te waiariki me te pai o te thermoplasticity.
3. Kaore he tae ki te ra.
4. He pai te ngawari.
5. He pai nga ahuatanga dielectric.
6. He pai te parenga alkali me te ngoikore o te waikawa waikawa.
7. He pai te mahi anti-hoholo.
8. He pai te aukati ki te tote, te makariri me te makuku.
9. Ka mau ki nga matū, te rokiroki mo te wa roa kaore he kino.
10. Hototahi ki te maha kapia me te pai hototahi ki plasticizers katoa.
11. He ngawari ki te huri i te tae i raro i te taiao alkaline kaha me nga tikanga wera.


Wā tuku: Nov-15-2022
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