Shiri na cellulose ethers

Shiri nacellulose ethersya haɗa da canza sinadarai na halitta polymer cellulose ta hanyar etherification halayen. Wannan tsari yana gabatar da ƙungiyoyin ether akan ƙungiyoyin hydroxyl na sarkar polymer cellulose, wanda ke haifar da samuwar ethers na cellulose tare da kaddarorin musamman. Mafi yawan ethers cellulose sun hada da Hydroxypropyl Methylcellulose (HPMC), Carboxymethyl Cellulose (CMC), Hydroxyethyl Cellulose (HEC), Methyl Cellulose (MC), da Ethyl Cellulose (EC). Ga cikakken bayanin tsarin shirye-shiryen:

1. Samuwar Cellulose:

• Tsarin yana farawa ne tare da samo cellulose, wanda yawanci ana samo shi daga ɓangaren itace ko auduga. Zaɓin tushen cellulose zai iya rinjayar kaddarorin samfurin ether cellulose na ƙarshe.

2. Tuba:

• An ƙaddamar da cellulose zuwa matakai na jujjuyawa don rushe zaruruwa zuwa mafi kyawun tsari. Wannan na iya ƙunsar hanyoyin injina ko na sinadari.

3. Tsarkakewa:

• An tsarkake cellulose don cire datti, lignin, da sauran abubuwan da ba na cellulosic ba. Wannan matakin tsarkakewa yana da mahimmanci don samun ingantaccen kayan cellulose.

4. Ra'ayin Etherification:

• Cellulose mai tsarkakewa yana fuskantar etherification, inda aka gabatar da ƙungiyoyin ether zuwa ƙungiyoyin hydroxyl akan sarkar polymer cellulose. Zaɓin wakilin etherifying da yanayin amsawa ya dogara da samfurin ether cellulose da ake so.
• Abubuwan da aka haɗa da etherifying sun haɗa da ethylene oxide, propylene oxide, sodium chloroacetate, methyl chloride, da sauransu.

5. Sarrafa Ma'aunin Amsa:

• Ana sarrafa halayen etherification a hankali dangane da zafin jiki, matsa lamba, da pH don cimma burin da ake so na maye gurbin (DS) da kuma guje wa halayen gefe.
• Ana amfani da yanayin alkaline sau da yawa, kuma ana lura da pH na cakuda amsa a hankali.

6. Tsakani da Wanka:

• Bayan amsawar etherification, samfuran galibi ana bazuwa don cire wuce haddi na reagents ko samfuran. Ana biye da wannan mataki da wankewa sosai don kawar da sauran sinadarai da ƙazanta.

7. Bushewa:

• An bushe cellulose mai tsabta da etherified don samun samfurin ether cellulose na ƙarshe a cikin foda ko nau'i na granular.

8. Kula da inganci:

• Daban-daban na nazari ana amfani da su don kula da inganci, gami da haɓakar maganadisu ta nukiliya (NMR) spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, da chromatography.
• Matsayin maye gurbin (DS) shine mahimmin siga da ake kulawa yayin samarwa don tabbatar da daidaito.

9. Kerawa da Marufi:

• Sa'an nan kuma an tsara ether cellulose zuwa maki daban-daban don saduwa da takamaiman buƙatun aikace-aikace daban-daban. Ana tattara samfuran ƙarshe don rarrabawa.

Shirye-shiryen ethers cellulose wani tsari ne mai rikitarwa wanda ke buƙatar kulawa da hankali game da yanayin amsawa don cimma abubuwan da ake so. Ƙwararren ethers na cellulose yana ba da damar yin amfani da su a cikin aikace-aikace masu yawa a cikin masana'antu, ciki har da magunguna, abinci, gine-gine, sutura, da sauransu.