Technology yeCellulose Ethers

Tekinoroji yecellulose ethersinosanganisira kugadziridzwa kwe cellulose, yakasikwa polima inotorwa kubva kuchirimwa masero madziro, kugadzira zvinobva kune chaiyo zvimiro uye zvinoshanda. Anonyanya kuzivikanwa seruseruse ethers anosanganisira Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), uye Ethyl Cellulose (EC). Heino tarisiro yetekinoroji inoshandiswa mukugadzira cellulose ethers:

1. Raw Material:
   • Kunobva Cellulose: Iyo yekutanga mbishi ye cellulose ethers i cellulose, iyo inowanikwa kubva muhuni pulp kana donje. Iyo cellulose sosi inokanganisa maitiro ekupedzisira cellulose ether chigadzirwa.
2. Kugadzirira kwe cellulose:
   • Pulping: Huni pulp kana donje rinoiswa pasi pemaitiro ekupuruzira kuputsa iyo cellulose fiber kuita fomu inogoneka.
   • Kucheneswa: Iyo cellulose inonatswa kuti ibvise kusvibiswa uye lignin, zvichikonzera yakanatswa cellulose zvinhu.
3. Kemikari Kugadziriswa:
   • Etherification Reaction: Nhanho yakakosha mukugadzirwa kwe cellulose ether kugadziridzwa kwekemikari ye cellulose kuburikidza nekuita kwe etherification. Izvi zvinosanganisira kuunza mapoka eether (semuenzaniso, hydroxyethyl, hydroxypropyl, carboxymethyl, methyl, kana ethyl) kumapoka ehydroxyl pa cellulose polymer chain.
   • Sarudzo yeMareagents: Zvigadzirwa zvakaita seethylene oxide, propylene oxide, sodium chloroacetate, kana methyl chloride zvinowanzoshandiswa mukuita uku.
4. Kudzora kweReaction Parameters:
   • Tembiricha uye Kudzvanya: Etherification maitiro anowanzo itwa pasi pekudzora tembiricha uye kumanikidza mamiriro kuti uwane yaunoda dhigirii yekutsiva (DS) uye kudzivirira maitiro epadivi.
   • Alkaline Conditions: Mazhinji etherification maitiro anoitwa pasi pemamiriro ealkaline, uye pH yemusanganiswa wekuita inotariswa zvakanyatsonaka.
5. Kucheneswa:
   • Neutralization: Mushure mekuita etherification, chigadzirwa chinowanzo gadziriswa kubvisa zvakawandisa reagents kana ne-zvigadzirwa.
   • Washing: Iyo yakagadziridzwa cellulose inogezwa kubvisa makemikari asara uye tsvina.
6. Kuomesa:
   • Iyo yakacheneswa cellulose ether yakaomeswa kuti iwane chigadzirwa chekupedzisira muhupfu kana granular fomu.
7. Kudzora Hunhu:
   • Ongororo: Nzira dzakasiyana-siyana dzekuongorora, dzakadai senuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, uye chromatography, dzinoshandiswa kuongorora chimiro uye zvimiro zve cellulose ethers.
   • Dhigirii reKutsiva (DS): Iyo DS, inomiririra avhareji yenhamba yevanotsiva pane anhydroglucose unit, yakakosha parameter inodzorwa panguva yekugadzira.
8. Kugadzira uye Kushandisa:
   • Ekupedzisira-Mushandisi Maumbirwo: Cellulose ethers inopihwa kune vashandisi vekupedzisira mumaindasitiri akasiyana-siyana, anosanganisira kuvaka, mishonga yemishonga, chikafu, kuchengetwa kwevanhu, uye machira.
   • Kushandisa-Chaicho Magiredhi: Akasiyana mamakisi e-cellulose ether anogadzirwa kuti asangane nezvinodiwa zvekushandisa kwakasiyana.
9. Tsvagiridzo nekuvandudza:
   • Kuenderera mberi Kuvandudza: Zviitiko zvekutsvagisa nekusimudzira zvinotarisa mukuvandudza maitiro ekugadzira, kusimudzira mashandiro ecellulose ethers, uye kuongorora zvinyorwa zvitsva.

Izvo zvakakosha kuti uzive kuti tekinoroji yekugadzira chaiyo cellulose ethers inogona kusiyana zvichienderana neinodiwa zvivakwa uye mashandisiro. Iyo inodzorwa shanduko ye cellulose kuburikidza ne etherification reactions inobvumira kuwanda kwe cellulose ethers ine akasiyana mashandiro, zvichiita kuti ive yakakosha mumaindasitiri akasiyana.