Cellulose ethers uye nzira yekugadzira zvakafanana

Kugadzirwa kwecellulose ethersinobatanidza nhevedzano yemakemikari ekuchinja kune cellulose, zvichikonzera kubva kune yakasarudzika zvivakwa.Iyi inotevera ongororo yakajairika yenzira dzinoshandiswa kugadzira cellulose ethers:

1. Kusarudzwa kweCellulose Kwakabva:

• Cellulose ethers inogona kutorwa kubva kwakasiyana siyana sehuni pulp, donje linters, kana zvimwe zvinomera-based materials.Sarudzo ye cellulose sosi inogona kukanganisa hunhu hwekupedzisira cellulose ether chigadzirwa.

2. Pulping:

• Iyo cellulose sosi inopinda pulping kuti iparadze mafiber kuita inogoneka fomu.Pulping inogona kuwanikwa kuburikidza nemakanika, makemikari, kana musanganiswa wenzira mbiri.

3. Kucheneswa:

• Iyo pulped cellulose inoiswa pasi pekunatswa maitiro ekubvisa tsvina, lignin, uye zvimwe zvisiri-cellulosic components.Kucheneswa kwakakosha kuti uwane chemhando yepamusoro cellulose zvinhu.

4. Kuita kweCellulose:

• Iyo yakacheneswa cellulose inoshandiswa nekuzvimba muine alkaline solution.Iyi nhanho yakakosha pakuita kuti cellulose iwedzere kuita basa panguva inotevera etherification reaction.

5. Etherification Reaction:

• Iyo activated cellulose inopinda etherification, uko ether mapoka anounzwa kumapoka ehydroxyl pane cellulose polymer cheni.Kazhinji etherifying agents zvinosanganisira ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, nezvimwe.
• Maitiro acho anowanzo kuitwa pasi pemamiriro ekudzora tembiricha, kudzvanywa, uye pH kuti uwane iyo inodiwa dhigirii yekutsiva (DS) uye kudzivirira maitiro epadivi.

6. Neutralization uye Washing:

• Mushure mekuita kwe etherification, chigadzirwa chinowanzogadziriswa kuti chibvise mareagents akawandisa kana ne-zvigadzirwa.Matanho anotevera ekugeza anoitwa kuti abvise makemikari akasara uye tsvina.

7. Kuomesa:

• Iyo yakacheneswa uye etherified cellulose yakaomeswa kuti iwane yekupedzisira cellulose ether chigadzirwa muupfu kana granular fomu.

8. Kudzora Hunhu:

• Nzira dzakasiyana-siyana dzekuongorora, dzinosanganisira nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, uye chromatography, inoshandiswa pakutonga kwemhando.Iyo DS inotariswa zvakanyanya kuti ive nechokwadi chekuenderana.

9. Kugadzira uye Kushandisa:

• Iyo cellulose ether inozogadzirwa kuita mamakisi akasiyana kuti isangane nezvinodiwa zvekushandisa kwakasiyana.Yakasiyana cellulose ethers inokodzera maindasitiri akasiyana, akadai sekuvaka, mishonga yemishonga, chikafu, machira, nezvimwe.

Zvakakosha kuziva kuti nzira dzakananga uye mamiriro anogona kusiyana zvichienderana neinodiwa cellulose ether chigadzirwa uye chinangwa chekushandisa.Vagadziri vanowanzo shandisa maitiro evaridzi kugadzira cellulose ether ine chaiyo zvivakwa zvakagadzirirwa kuzadzisa zvinodiwa nemaindasitiri akasiyana.