Hydroxypropyl methyl cellulose, kei te mohio koe?

1.HPMCkua wehea ki te momo inamata me te momo marara tere.

Ko te momo whakamararatanga tere HPMC ka piri ki te reta S, a me taapiri te glyoxal i te wa o te mahi whakaputa.

Ko te momo inamata HPMC kaore e taapiri i nga reta, penei i te “100000″ te tikanga “100000 pokey.

2. Ki te kore S ranei, he rereke nga ahuatanga

He tere te marara HPMC ka marara ina pa ana ki te wai matao ka ngaro atu ki te wai. I tenei wa, karekau he viscosity o te wai, no te mea ka marara noa te HPMC ki te wai kaore he tino rewa. I muri tata ki te rua meneti, ka piki haere te pokey o te wai, ka hanga he colloid Matotoru maamaa.

Ka tere te marara HPMC ki te wai wera i te 70°C. Ka heke te pāmahana ki tetahi pāmahana, ka puhoi te ahua o te pokey tae noa ki te hanga i tetahi colloid puataata.

3.Ki te kore S ranei, he rereke te kaupapa

Ka taea anake te whakamahi i te HPMC ki te paura putty me te moata. I roto i te kapia wai, te peita me nga hua horoi, ka whakarōpūhia nga ahuatanga kaore e taea te whakamahi.

Ka tere mararaHPMChe maha nga momo tono ka taea te whakamahi ki te paura putty, mota, kapia wai, peita, me nga hua horoi kaore he aukati.

4.Te tikanga whakakore

4-1. Tangohia te nui o te wai wera, hoatu ki roto i te ipu ka whakamahana ki runga ake i te 80°C, me te whakauru i tenei hua i raro i te whakaoho puhoi. Ka rewa te cellulose ki runga i te mata wai i te tuatahi, engari ka marara haere ki te hanga i te puhu rite. I whakamataohia te otinga i te wa e korikori ana.

4-2. Ko te tikanga, whakamahanahia te 1/3, te 2/3 ranei o te wai wera ki runga ake i te 85°C, tāpirihia te cellulose kia whiwhi ai he slurry wai wera, kātahi ka tāpirihia te toenga o te wai matao, whakaohokia tonu, ka whakamatao i te ranunga hua.

4-3. He tino pai te mata o te cellulose, he matūriki iti takitahi i roto i te paura whakakorikori rite, a ka rewa tere ina tutaki ki te wai hei hanga i te pokey e hiahiatia ana.

4-4. Āta tāpirihia te cellulose ki te pāmahana rūma, me te whakaoho kia puta ra ano he otinga marama.

5.He aha nga mea e pa ana ki te pupuri wai o te hydroxypropyl methyl cellulose?

5-1. Cellulose ether HPMC homogeneity

Ko te HPMC, te methoxyl me te hydroxypropoxyl te taurite ka tohatohahia, he nui te reiti pupuri wai.

5-2. Cellulose ether HPMC waiariki rangi pāmahana

Ko te teitei ake o te wera o te waiariki, ka nui ake te tere o te pupuri wai; ki te kore, ka iti ake te utu pupuri wai.

5-3. Cellulose Ether HPMC Viscosity

A, no te piki te pokey o te HPMC, ka piki hoki te reiti pupuri wai; ka tae te pokey ki tetahi taumata, ka ngawari te piki o te reiti pupuri wai.

6.Apiti nui o te cellulose ether HPMC

Ko te nui ake o te cellulose etherHPMCka tapiritia, ka nui ake te reeti pupuri wai me te pai ake o te paanga wai.

I roto i te awhe o te 0.25-0.6%, ka tere haere te tere o te pupuri i te wai me te pikinga o te moni taapiri; ka piki ake te moni taapiri, ka heke te pikinga o te reiti pupuri wai.


Te wa tuku: Apr-26-2024