Kukonzekera kwa Carboxymethyl cellulose

Carboxymethyl cellulose (cmc)ndi polymer osungunuka madzi osungunuka kuchokera ku cellulose, yomwe ndi polysaczacdide wachilengedwe wopezeka mumiyala ya cell. CMC imapeza ntchito zochulukirapo m'mafakitale osiyanasiyana kuphatikizapo chakudya, mankhwala odzola, odzola, mapepala, ndi ena ambiri chifukwa chopanga mafilimu. Kukonzekera kwa CMC kumaphatikizapo masitepe angapo kuyambira kuchotsera kwa cellulose ku zinthu zachilengedwe kutsatiridwa ndi kusintha kwa ma carboxymethyl.

1. Kuchotsera kwa Cellulose:
Gawo loyamba pokonzekera cmc ndi kuchotsera kwa cellulose ku zinthu zachilengedwe monga mtengo wamtengo, mabatani a thonje, kapena ulusi wina. Cellulose nthawi zambiri imapezeka kudzera mu njira zingapo kuphatikiza kuphikidwa, kuthirira, ndi kuyeretsedwa. Mwachitsanzo, zamkati zamkati zitha kupezeka ndi njira zamakina kapena zamankhwala zomwe zimatsatiridwa poyamwa ndi chlorine kapena hydrogen peroxide kuti muchotse zosayera ndikukhala ndi zingwe.

2. Kuyambitsa kwa Cellulose:
Cellulose yotulutsidwa, imafunikira kuyikidwa kuti ithandizire kuyambitsa magulu a carboxymethyl. Kuyambitsa nthawi zambiri kumachitika pochiza cellulose ndi alkali monga sodium hydroxide (Naoh) kapena sodium carbonate (Na2co3) pansi pa kutentha kwa kutentha ndi kukakamizidwa. Chithandizo cha alkali amatupa ulusi wa cellulose ndikuwonjezera kufupika kwawo ndikuphwanya ma intra ndi ma hydrogen hydrogen.

3. Carboxymethy.
Cellulose yoyambitsidwa imayang'aniridwa ndi carboxymethytation potengera ma carboxymethyl magulu (-ch2cooh) amayambitsidwa ndi magulu a hydroxyl a unyolo. Izi zimachitika kawirikawiri poyankha cellulose yoyambitsidwa ndi sodium monochlorocetacetacetacetacetacetacetacetacetacetacetacetacetacetacetacetacetacetacetacetate (SMCA) Pamaso pa chothandizira cha alkalines monga sodium hydroxide (Naoh). Zomwe zikuchitikazo zitha kuyimiriridwa motere:

Cellulose + chloroocetic acid → Carboxymethyl cellulose + nacl

Zomwe zimachitika kuphatikiza kutentha, nthawi yocheza, ndi ph zimayang'aniridwa mosamala kuti zitsimikizidwe kwambiri.

4..
Pambuyo pa carboxymelation potengera, zomwe zimapangitsa kuti cellose isaloweretse bwino kuchotsa alkali komanso osakhazikika acid. Izi zimachitika ndikutsuka malonda ndi madzi kapena kuchepetsa yankho la acid lotsatiridwa ndi kusefa kwa cmc yolimba kuchokera ku zosakaniza.

5. Kuyeretsa:
CMC yoyeretsedwa imatsukidwa ndi madzi kangapo kuti muchotse zosayera monga mchere, zoyeserera zosatsimikizika, komanso zopangidwa ndi zinthu. Kusefera kapena centrifiagation kumatha kugwiritsidwa ntchito kulekanitsa masentimita oyeretsa kuchokera kumadzi otsuka.

6. Kuyanika:
Pomaliza, carboxymethylyl cellose imawuma kuti ichotse chinyezi chotsalira ndikupeza zomwe mukufuna mu ufa wowuma kapena granules. Kuyanika kumatha kuchitika pogwiritsa ntchito njira zosiyanasiyana monga kuyanika kwa mpweya, kuyanika, kapena kuyanika kuwuma malinga ndi zomwe mukufuna.

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ZoumaCmcZogulitsa zimayang'aniridwa ndi njira zingapo zodziwika bwino monga masinthidwe anayi omwe amaperekedwa Spectroscopy (FTR), miyeso ya nyukiliya ya nyukiliya (NMR), ndi ma villeh Mayeso apadera olimbitsa thupi amapangidwanso kuti awonetsetse kuti malondawo akukwaniritsa zofunikira pazomwe cholinga chake ndi zomwe akufuna.

Kukonzekera kwa carboxymethyl cellulose kumaphatikizapo njira zingapo kuphatikiza m'zigawo za cellulose, kutsegula, kulowerera, kuyeretsa, kuyanika, ndi kuyanika. Gawo lirilonse limafuna kuyang'anira zinthu mosamala ndi magawo kuti akwaniritse zokolola zambiri, zomwe mukufuna kuti zitheke, komanso mtundu womaliza. CMC ndi polymer yomwe imagwiritsidwa ntchito poimba kwambiri chifukwa cha ntchito zosiyanasiyana chifukwa cha zinthu zake zapadera komanso zosokoneza.