Kugadzirira kwe cellulose ethers

Kugadzirira kwecellulose ethersinosanganisira kugadzirisa kemikari iyo yakasikwa polymer cellulose kuburikidza ne etherification maitiro. Maitiro aya anosuma mapoka eether mumapoka ehydroxyl eiyo cellulose polymer cheni, zvichitungamira mukuumbwa kwema cellulose ether ane akasiyana zvimiro. Anonyanya kuzivikanwa seruseruse ethers anosanganisira Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), uye Ethyl Cellulose (EC). Heino mhedziso yemaitiro ekugadzirira:

1. Cellulose Sourcing:

• Maitiro acho anotanga nekutsvaga cellulose, iyo inowanzobva pahuni pulp kana donje. Sarudzo ye cellulose sosi inogona kukanganisa zvimiro zveyekupedzisira cellulose ether chigadzirwa.

2. Pulping:

• Iyo cellulose inoiswa pasi pekuita pulping maitiro ekupwanya mafibhi kuti ave fomu rinogoneka. Izvi zvinogona kusanganisira mechanical kana makemikari pulping nzira.

3. Kucheneswa:

• Iyo cellulose inonatswa kubvisa tsvina, lignin, uye zvimwe zvisiri-cellulosic components. Iyi nhanho yekucheneswa yakakosha kuti uwane yemhando yepamusoro cellulose zvinhu.

4. Etherification Reaction:

• Iyo yakacheneswa cellulose inopinda etherification, uko ether mapoka anounzwa kumapoka ehydroxyl pane cellulose polymer cheni. Sarudzo ye etherifying agent uye maitiro ekuita zvinoenderana neinodiwa cellulose ether chigadzirwa.
• Kazhinji etherifying agents zvinosanganisira ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, nezvimwe.

5. Kudzora kweReaction Parameters:

• Iyo etherification reaction inodzorwa zvine hungwaru maererano netembiricha, kudzvanywa, uye pH kuti uwane iyo inodiwa dhigirii yekutsiva (DS) uye kudzivirira maitiro epadivi.
• Alkaline mamiriro anowanzo shandiswa, uye pH yemusanganiswa wekuita inotariswa zvakanyanya.

6. Neutralization uye Washing:

• Mushure mekuita kwe etherification, chigadzirwa chinowanzogadziriswa kuti chibvise mareagents akawandisa kana ne-zvigadzirwa. Danho iri rinoteverwa nekunyatsogeza kubvisa makemikari asara 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 dzekuongorora dzinoshandiswa pakutonga kwemhando, kusanganisira nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, uye chromatography.
• Iyo dhigirii yekutsiva (DS) yakakosha parameter inotariswa panguva yekugadzirwa kuti ive nechokwadi chekuenderana.

9. Kugadzira uye Packaging:

• Iyo cellulose ether inozogadzirwa kuita mamakisi akasiyana kuti isangane nezvinodiwa chaizvo zvekushandisa kwakasiyana. Zvigadzirwa zvekupedzisira zvakaputirwa kuti zvigovane.

Kugadzirira kwe cellulose ethers inzira yakaoma yemakemikari inoda kunyatso kudzora mamiriro ekuita kuti uwane izvo zvinodiwa. Iko kushandiswa kwakasiyana-siyana kwe cellulose ethers inobvumira kushandiswa kwavo mune dzakasiyana siyana dzekushandisa mumaindasitiri, kusanganisira mishonga, chikafu, kuvaka, machira, nezvimwe.