Nzira yekugadzira methyl cellulose ether

Kugadzirwa kwemethyl cellulose etherinosanganisira kugadziridzwa kwekemikari ye cellulose kuburikidza ne etherification reactions.Methyl cellulose (MC) is water-soluble cellulose ether inoshandiswa zvakanyanya mumaindasitiri akasiyana.Heino mhedziso yemaitiro ekugadzirwa kwemethyl cellulose ether:

1. Kusarudzwa kweCellulose Kwakabva:

• Maitiro acho anotanga nekusarudzwa kweselulosi sosi, inowanzobva pahuni pulp kana donje.Iyo cellulose sosi inosarudzwa zvichibva pane inodiwa maitiro ekupedzisira methyl cellulose chigadzirwa.

2. Pulping:

• Iyo yakasarudzwa cellulose sosi inopinda pulping, maitiro anopwanya mafiber kuita fomu inogoneka.Pulping inogona kuwanikwa kuburikidza nemichina kana makemikari nzira.

3. Kuita kweCellulose:

• Iyo pulped cellulose inozoitwa nekuibata nealkaline solution.Iyi nhanho ine chinangwa chekuzvimba iyo cellulose fiber, ichiita kuti iwedzere kuita panguva yekuzotevera etherification reaction.

4. Etherification Reaction:

• Iyo yakagadziriswa cellulose inopinda etherification, uko ether mapoka, mune iyi kesi, methyl mapoka, anounzwa kumapoka ehydroxyl pane cellulose polymer cheni.
• Iyo etherification reaction inosanganisira kushandiswa kwemethylating agents se sodium hydroxide uye methyl chloride kana dimethyl sulfate.Mamiriro ekuita, kusanganisira tembiricha, kudzvanywa, uye nguva yekuita, anodzorwa nekuchenjera kuti awane dhigirii rinodiwa rekutsiva (DS).

5. Neutralization uye Washing:

• Mushure meiyo etherification reaction, chigadzirwa hachina kuchinjika kubvisa yakawandisa alkali.Matanho anotevera ekugeza anoitwa kuti abvise makemikari akasara uye tsvina.

6. Kuomesa:

• Iyo yakacheneswa uye methylated cellulose yakaomeswa kuti iwane yekupedzisira methyl cellulose ether chigadzirwa muchimiro chehupfu kana granules.

7. Kudzora Hunhu:

• Nzira dzakasiyana-siyana dzekuongorora, dzinosanganisira nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, uye chromatography, inoshandiswa pakutonga kwemhando.Iyo dhigirii yekutsiva (DS) yakakosha parameter inotariswa panguva yekugadzira.

8. Kugadzira uye Packaging:

• Iyo methyl cellulose ether inozogadzirwa kuita mamakisi akasiyana kuti isangane nezvinodiwa chaizvo zvekushandisa kwakasiyana.Magiredhi akasiyana anogona kusiyana muviscosity yavo, particle size, uye zvimwe zvivakwa.
• Zvigadzirwa zvekupedzisira zvakaputirwa kuti zvigovane.

Izvo zvakakosha kuti uzive kuti iwo chaiwo mamiriro uye mareagents anoshandiswa mune etherification reaction anogona kusiyana zvichibva pamabatiro emugadziri uye hunhu hunodiwa hwechigadzirwa chemethyl cellulose.Methyl cellulose inowana zvikumbiro muindasitiri yechikafu, mishonga, kuvaka, uye mamwe masekete nekuda kwekunyungudika kwemvura uye kugona kugadzira firimu.