He aha te hydroxyethyl methylcellulose?

ingoa ingoa: hydroxyethyl methyl cellulose; hydroxyethyl methyl cellulose; hydroxymethyl ethyl cellulose; 2-hydroxyethyl methyl ether cellulose
Ingoa ingoa Ingarihi: Methylhydroxyethylcellulose; Cellulose; 2-hydroxyethyl methyl ether; HEMC; Tyopur MH[1]
Matū: Hydroymethylmethylcellulose;Hydroxyethylmethylcellulose; Hydroxymethylethylcellulose.
Rehita CAS: 9032-42-2

Molecule: C2H6O2 xCH4O x PhEur 2002 tautuhi hydroxyethyl methylcellulose rite wāhanga O-methylated, wāhanga O-hydroxymethylated cellulose. He rereke nga korero e whakaatuhia ana e te uara viscosity o te 2% w/v wairewa wai i te 20°C, a ko te waeine he mPa s.
Te taumaha o te ngota: PhEur 2002 te tautuhi hydroxyethyl methylcellulose hei waahanga O-methylated, he waahanga O-hydroxymethylated cellulose. He rereke nga korero e whakaatuhia ana e te uara viscosity o te 2% w/v wairewa wai i te 20°C, a ko te waeine he mPa s.

Ko nga ahuatanga matua o te hydroxyethyl methylcellulose (HEMC) ko:

1. Wairewa: Ka whakarewahia ki te wai me etahi whakarewa waro. Ka taea te whakakore i te HEMC ki te wai matao. Ko tona kukū teitei ka whakatauhia e te pokey anake. He rereke te wairewa ki te pokey. Ko te iti o te pokey, ka nui ake te whakarewatanga.

2. Atete tote: Ko nga hua HEMC he etera cellulose kore-katote, ehara i te polyelectrolytes, no reira he tino pumau i roto i nga wairewa wai i te wa e noho ana nga tote whakarewa, nga electrolytes waro ranei, engari ko te nui o te taapiri o nga electrolytes ka puta te huka me te ua.

3. Mahi mata: Na te mahi kaha o te mata o te wairewa wai, ka taea te whakamahi hei kaihoko tiaki colloidal, emulsifier me te dispersant.

4. Ngaariki waiariki: I te wa e whakamahanahia ana te otinga wai o te HEMC ki tetahi pāmahana, ka noho puatakore, ka pupuhi, ka pupuhi, engari ka whakamatao tonu, ka hoki mai ki te ahua o te otinga taketake, ka puta te reera me te rerenga. Ko te pāmahana te nuinga ka whakawhirinaki ki o raatau whakahinuhinu, awhina aukati, colloids whakamarumaru, emulsifiers, etc.

5. Te ngoikore o te metabolic me te iti o te kakara me te kakara: Kei te whakamahia nuitia te HEMC ki te kai me te rongoa na te mea kare e whakakorikoria, he iti te kakara me te kakara.

6. Te atete ki te koriri: He pai te ahua o te HEMC ki te koriri me te pai o te whakapumautanga i roto i te rokiroki mo te wa roa.

7. PH pūmautanga: Ko te pokey o te otinga wai o ngā hua HEMC he whakauaua pāngia e te waikawa alkali ranei, a he āhua pūmau te uara pH i roto i te whānuitanga o 3.0-11.0.
Taupānga: Ka taea te whakamahi Hydroxyethyl methylcellulose hei kaihoko whakamarumaru colloidal, emulsifier me te dispersant na runga i tana mahi kaha o te mata i roto i te wairewa wai. Ko tana tauira tono e whai ake nei: te awe o te hydroxyethyl methylcellulose ki te mahi o te ciment. Ko te Hydroxyethyl methylcellulose he paura ma kore-paitini, karekau he kakara, karekau he paitini ka taea te rewa i roto i te wai matao hei hanga i te wairewa puataata. Kei a ia nga ahuatanga o te matotoru, te here, te marara, te whakaemulsifying, te hanga kiriata, te whakatārewatanga, te adsorbing, te gelling, te kaha o te mata, te pupuri i te makuku me te tiaki i te colloid. I te mea he mahi kaha te mata o te wairewa wai, ka taea te whakamahi hei kaihoko whakamarumaru colloidal, emulsifier me te dispersant. Hydroxyethyl methylcellulose wairewa wai he hydrophilicity pai, me te he māngai pupuri wai pai.