Cellulose ethers uye nzira yekugadzira zvakafanana

Kugadzirwa kweethers dze celluloseinosanganisira shanduko dzemakemikari ku cellulose, zvichikonzera ma derivatives ane hunhu hwakasiyana. Inotevera ipfupiso yenzira dzinoshandiswa kugadzira cellulose ethers:

1. Kusarudzwa kweManyuko eCellulose:

• Ma ether e cellulose anogona kuwanikwa kubva munzvimbo dzakasiyana-siyana dzakadai se pulp yehuni, donje, kana zvimwe zvinhu zvinobva mumiti. Kusarudzwa kwe cellulose source kunogona kukanganisa hunhu hwechigadzirwa che cellulose ether chekupedzisira.

2. Kudhonza:

• Kunobva cellulose kunopwanywa kuti kupwanye shinda kuita zviri nyore. Kupwanywa kunogona kuitwa kuburikidza nekushandisa michina, makemikari, kana musanganiswa wenzira dzese dziri mbiri.

3. Kucheneswa:

• Cellulose yakacheneswa inocheneswa kuti ibvise tsvina, lignin, nezvimwe zvinhu zvisiri zve cellulosic. Kucheneswa kwakakosha kuti pave ne cellulose yemhando yepamusoro.

4. Kushanda kweCellulose:

• Cellulose yakacheneswa inovhurwa nekuiputira mumushonga wealkaline. Danho iri rakakosha pakuita kuti cellulose iite zviri nani panguva ye etherification reaction inotevera.

5. Maitiro eEtherification:

• Selulosi yakakamurwa inopinda mu etherification, uko mapoka e ether anounzwa kumapoka e hydroxyl ari pa cellulose polymer chain. Zvinhu zvinowanzo shandiswa mu etherifying zvinosanganisira ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, nezvimwewo.
• Maitiro acho anowanzoitwa pasi pemamiriro ekupisa, kumanikidzwa, uye pH kuti pave nedanho rinodiwa rekutsiva (DS) uye kudzivirira migumisiro yakaipa.

6. Kusabvisa ganda nekugeza:

• Mushure mekupiswa kwechinhu ichi, chigadzirwa ichi chinowanzo bviswa zvinhu zvinokuvadza kana zvimwe zvinokuvadza. Matanho ekugeza anotevera anoitwa kubvisa makemikari netsvina zvasara.

7. Kuomesa:

• Cellulose yakacheneswa uye yakapiswa inoomeswa kuti iwane chigadzirwa chekupedzisira che ether ye cellulose muchimiro cheupfu kana granular.

8. Kudzora Hunhu:

• Nzira dzakasiyana-siyana dzekuongorora, dzinosanganisira nuclear magnetic resonance (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, uye chromatography, dzinoshandiswa kudzora mhando. DS inotariswa zvakanyanya kuti ive nechokwadi chekuti zvinhu zvinoenderana.

9. Kugadzira uye Kushandisa:

• Cellulose ether inozogadzirwa kuita magiredhi akasiyana kuti ienderane nezvinodiwa zvemashandisirwo akasiyana-siyana. Cellulose ether dzakasiyana dzakakodzera maindasitiri akasiyana, akadai sekuvaka, mishonga, chikafu, machira, nezvimwewo.

Zvakakosha kuziva kuti nzira nemamiriro ezvinhu zvinogona kusiyana zvichienderana nechinhu chinodiwa che cellulose ether uye mashandisirwo ainotarisirwa. Vagadziri vanowanzo shandisa maitiro ega ega kugadzira cellulose ethers dzine hunhu hwakasiyana hwakagadzirirwa kuzadzisa zvinodiwa nemaindasitiri akasiyana-siyana.