Njira yopangira methyl cellulose ether

Kupanga kwamethyl cellulose etherimakhudzanso kusintha kwa mankhwala a cellulose kudzera muzochita za etherification. Methyl cellulose (MC) ndi ether yosungunuka m'madzi yomwe imagwiritsidwa ntchito m'mafakitale osiyanasiyana. Nayi chidule cha njira yopangira methyl cellulose ether:

1. Kusankhidwa kwa Ma cellulose:

• Njirayi imayamba ndi kusankha gwero la cellulose, lomwe nthawi zambiri limachokera ku nkhuni kapena thonje. Gwero la cellulose limasankhidwa kutengera mawonekedwe omwe amafunidwa amtundu womaliza wa methyl cellulose.

2. Kupupa:

• Chitsime chosankhidwa cha cellulose chimadutsa pulping, njira yomwe imaphwanya ulusi kuti ukhale wotheka. Kutulutsa kumatha kutheka kudzera munjira zamakina kapena mankhwala.

3. Kuyambitsa Ma cellulose:

• The pulped cellulose ndiye adamulowetsa pochiza ndi alkaline solution. Sitepe iyi ikufuna kutupa ulusi wa cellulose, kuwapangitsa kukhala otakataka panthawi ya etherification reaction.

4. Etherification Reaction:

• Ma cellulose oyambitsidwa amakumana ndi etherification, pomwe magulu a ether, pakadali pano, magulu a methyl, amadziwitsidwa m'magulu a hydroxyl pa unyolo wa cellulose polima.
• Etherification reaction imaphatikizapo kugwiritsa ntchito mankhwala a methylating monga sodium hydroxide ndi methyl chloride kapena dimethyl sulfate. Zomwe zimachitikira, kuphatikizapo kutentha, kupanikizika, ndi nthawi yochitapo kanthu, zimayendetsedwa mosamala kuti mukwaniritse zomwe mukufuna m'malo (DS).

5. Kusalowerera ndale ndi Kuchapa:

• Pambuyo pochita etherification, mankhwalawa amachotsedwa kuti achotse mchere wambiri. Masitepe otsuka otsatirawa amachitidwa kuti athetse mankhwala otsalira ndi zonyansa.

6. Kuyanika:

• Ma cellulose oyeretsedwa ndi a methylated amawuma kuti apeze chomaliza cha methyl cellulose ether mu mawonekedwe a ufa kapena ma granules.

7. Kuwongolera Ubwino:

• Njira zosiyanasiyana zowunikira, kuphatikiza ma spectroscopy a nuclear magnetic resonance (NMR), Fourier-transform infrared (FTIR) spectroscopy, ndi chromatography, amagwiritsidwa ntchito pakuwongolera khalidwe. Digiri ya m'malo (DS) ndi gawo lofunikira lomwe limayang'aniridwa panthawi yopanga.

8. Kupanga ndi Kuyika:

• The methyl cellulose ether ndiye amapangidwa m'makalasi osiyanasiyana kuti akwaniritse zofunikira za ntchito zosiyanasiyana. Makalasi osiyanasiyana amatha kusiyanasiyana malinga ndi makulidwe awo, kukula kwa tinthu, ndi zina.
• Zogulitsa zomaliza zimayikidwa kuti zigawidwe.

Ndikofunikira kudziwa kuti mikhalidwe yeniyeni ndi ma reagents omwe amagwiritsidwa ntchito mu etherification amatha kusiyanasiyana kutengera zomwe wopanga amapanga komanso zomwe amafunikira pakupanga kwa methyl cellulose. Methyl cellulose amapeza ntchito m'makampani azakudya, mankhwala, zomangamanga, ndi magawo ena chifukwa cha kusungunuka kwamadzi komanso kupanga mafilimu.