Ma cellulose ethers ndi njira yopangira zomwezo

Kupanga kwama cellulose ethersimaphatikizapo kusintha kwa mankhwala ku cellulose, zomwe zimabweretsa zotumphukira zomwe zimakhala ndi mawonekedwe apadera. Zotsatirazi ndikuwunika mwachidule njira zomwe zimagwiritsidwa ntchito popangira ma cellulose ethers:

1. Kusankhidwa kwa Ma cellulose:

• Ma cellulose ethers amatha kupangidwa kuchokera kuzinthu zosiyanasiyana monga zamkati zamatabwa, ma linter a thonje, kapena zida zina zopangira mbewu. Kusankhidwa kwa gwero la cellulose kumatha kukhudza mawonekedwe a chinthu chomaliza cha cellulose ether.

2. Kupupa:

• Gwero la cellulose limadutsa kugwedeza kuti liphwanye ulusi kuti ukhale wotheka. Kutulutsa kumatha kutheka kudzera pamakina, mankhwala, kapena kuphatikiza njira zonse ziwiri.

3. Kuyeretsedwa:

• Ma cellulose a pulped amatha kuyeretsedwa kuti achotse zonyansa, lignin, ndi zinthu zina zopanda cellulosic. Kuyeretsa ndikofunikira kuti mupeze zinthu zapamwamba za cellulose.

4. Kuyambitsa Ma cellulose:

• Selulosi yoyeretsedwa imayendetsedwa ndi kutupa mu njira ya alkaline. Gawo ili ndilofunika kwambiri kuti cellulose ikhale yogwira ntchito kwambiri panthawi ya etherification.

5. Etherification Reaction:

• Ma cellulose oyambitsidwa amakumana ndi etherification, pomwe magulu a ether amadziwitsidwa kumagulu a hydroxyl pa unyolo wa cellulose polima. Ma etherifying odziwika bwino akuphatikizapo ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, ndi ena.
• Zomwe zimachitika nthawi zambiri zimayendetsedwa ndi kutentha, kukakamizidwa, ndi pH kuti mukwaniritse zomwe mukufuna m'malo (DS) ndikupewa zomwe zimachitika.

6. Kusalowerera ndale ndi Kuchapa:

• Pambuyo anachita etherification, mankhwala nthawi zambiri neutralized kuchotsa reagents owonjezera kapena ndi mankhwala. Kuchapira kotsatira kumachitidwa kuti athetse mankhwala otsalira ndi zonyansa.

7. Kuyanika:

• Ma cellulose oyeretsedwa ndi etherified amawuma kuti apeze chomaliza cha cellulose ether mu ufa kapena mawonekedwe a granular.

8. Kuwongolera Ubwino:

• Njira zosiyanasiyana zowunikira, kuphatikiza ma spectroscopy a nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR) spectroscopy, ndi chromatography, amagwiritsidwa ntchito pakuwongolera khalidwe. DS imayang'aniridwa mosamala kuti iwonetsetse kuti ikugwirizana.

9. Kupanga ndi Kugwiritsa Ntchito:

• Ma cellulose ether amapangidwa m'makalasi osiyanasiyana kuti akwaniritse zofunikira zamitundu yosiyanasiyana. Ma cellulose ether osiyanasiyana ndi oyenerera kumafakitale osiyanasiyana, monga zomangamanga, zamankhwala, chakudya, zokutira, ndi zina zambiri.

Ndikofunikira kudziwa kuti njira ndi mikhalidwe ingasiyane kutengera mtundu womwe mukufuna komanso momwe mungagwiritsire ntchito. Opanga nthawi zambiri amagwiritsa ntchito njira za eni ake kuti apange ma cellulose ether okhala ndi zinthu zina zomwe zimapangidwira kuti zikwaniritse zosowa zamafakitale osiyanasiyana.