Focus on Cellulose ethers

Te Hiranga me te Whakamahinga o Hydroxyethyl Cellulose

1. Nga ahuatanga o te hydroxyethyl cellulose

Ko tenei hua he ma, he kowhai marama ranei he hongi me te ngawari te rere o te paura, 40 mata reeti tatari ≥99%; te mahana maru: 135-140°C; kiato kitea: 0.35-0.61g/ml; te pāmahana pirau: 205-210°C; tere tahu He puhoi; pāmahana taurite: 23°C; 6% i te 50% rh, 29% i te 84% rh.

He wairewa i roto i te wai matao me te wai wera, a, i te nuinga o te waa karekau i roto i te nuinga o nga whakarewa pararopi. He paku rereke te pokey i te awhe o te uara PH 2-12, engari ka heke te pokey ki tua atu i tenei awhe.

2. Nga taonga nui

Ka rite ki te surfactant katote kore,hydroxyethyl cellulosekei a ia nga ahuatanga e whai ake nei hei taapiri mo te whakamatotoru, te whakatarewa, te here, te maanu, te hanga kiriata, te marara, te pupuri wai me te whakarato colloid tiaki:

1. He wairewa te HEC i roto i te wai wera, i te wai matao ranei, a kare e pupuhi i te pāmahana teitei, te koropuputanga ranei, na te mea he maha nga momo whakarewatanga, nga ahuatanga pokey me te waiariki kore.

2. Karekau he katote, ka taea te noho tahi me te tini o etahi atu polymers wairewa-wairewa, surfactants, me nga tai. He tino pai rawa atu te whakamaarata colloidal mo nga otinga electrolyte tino kukū.

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, kei a HEC te kaha marara kino rawa atu, engari ko te kaha o te kaha o te colloid tiaki.

3. Te whakamahinga o te hydroxyethyl cellulose

I te nuinga o te wa e whakamahia ana hei whakamaroke, hei whakamarumaru, hei whakapiri, hei whakapumau me nga taapiri mo te whakarite i nga whakaehunga, tiēre, hinu, hinu, horoi kanohi, suppositories me papa, ka whakamahia ano hoki hei peera hydrophilic, rauemi anga, Ka taea te whakamahi ki te whakarite matrix- patopato i nga whakaritenga tuku toimau, ka taea hoki te whakamahi hei whakapumau i te kai.


Wā tuku: Tihema-27-2022
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