Focus on Cellulose ethers

Me pehea te whakamatautau i te Cellulose ether?

1. Te ahua:

Tirotiro kanohi i raro i te marama marara maori.

2. Viscosity:

Paunatia te 400 ml te ipurau whakakorikori teitei, ka paunatia te 294 g wai ki roto, whakahurihia te whakaranu, katahi ka tapirihia te 6.0 g o te etera cellulose kua paunatia; te whakaoho tonu kia rewa katoa, ka hanga he otinga 2%; Whai muri i te 3-4 haora i te pāmahana whakamātautau (20±2) ℃; whakamahia te viscometer hurihuri NDJ-1 ki te whakamatautau, ka tohua te tau rotor viscometer tika me te tere rotor i te wa o te whakamatautau. Tahurihia te rotor ka maka ki roto i te otinga ka waiho kia tu mo te 3-5 meneti; whakakāhia te whakakā ka tatari kia tau te uara, ka tuhi i te hua. Tuhipoka: (MC 40,000, 60,000, 75,000) Tīpakohia te rotor Nama 4 me te tere o te 6 hurihanga.

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3. Te ahua memeha ki te wai:

Tirohia te tukanga me te tere o te whakakore i te wa e whirihora ana hei otinga 2%.

4. ihirangi pungarehu:

Tangohia te ipu porcelain ka tahuna ki roto i te oumu koropuke hoiho, whakamatao i roto i te desiccator, ka paunatia kia noho tonu te taumaha. Kia tika te pauna (5~10) karamu o te tauira i roto i te para, ka tunuhia te parai ki runga i te oumu hiko, a ka tae ki te tino warohanga, hoatu ki roto i te oumu koropuke hoiho mo te (3~4) haora, katahi ka maka. i roto i te desiccator hei whakamatao. Paunatia tae noa ki te taumaha tonu. Tātaitanga pungarehu (X):

X = (m2-m1) / m0×100

I roto i te tauira: m1 ——te papatipu o te ipu, g;

m2 ——Tapeke papatipu o te ipu me te pungarehu i muri i te mura, g;

m0 ——te papatipu o te tauira, g;

5. Te nui o te wai (ka ngaro i te whakamaroke):

Paunatia te tauira 5.0g i runga i te paepae o te kaitirotiro makuku tere ka whakatika tika ki te tohu kore. Whakanuia te pāmahana me te whakatika i te pāmahana ki te (105±3) ℃. Ki te kore te tauine whakaatu e neke, tuhia te uara m1 (ko te 5mg te tika o te pauna).

Ihirangi wai (ngaro i te whakamaroke X (%)) tātaitanga:

X = (m1 / 5.0) × 100


Wā tuku: Noema-02-2021
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