Njira Yopangira Sodium Carboxymethylcellulose

Njira yopangira sodium carboxymethylcellulose (CMC) imaphatikizapo magawo angapo, kuphatikizapo kukonzekera cellulose, etherification, kuyeretsa, ndi kuumitsa. Nayi chidule cha njira yodziwika bwino yopangira:

1. Kukonzekera Cellulose: Njirayi imayamba ndi kukonzekera cellulose, yomwe nthawi zambiri imachokera ku matabwa kapena thonje. Cellulose imayeretsedwa kaye ndikuyeretsedwa kuti ichotse zonyansa monga lignin, hemicellulose, ndi zina zodetsa. Cellulose yoyeretsedwa iyi imagwira ntchito ngati chinthu choyambira kupanga CMC.
2. Alkalization: Cellulose yoyeretsedwa imachiritsidwa ndi yankho la alkaline, nthawi zambiri sodium hydroxide (NaOH), kuti iwonjezere reactivity yake ndikupangitsa kuti etherification ichitike pambuyo pake. Alkalization imathandizanso kutupa ndikutsegula ulusi wa cellulose, zomwe zimapangitsa kuti zikhale zosavuta kuzisintha ndi mankhwala.
3. Kuyankha kwa Etherification: Cellulose ya alkalized imayankhidwa ndi monochloroacetic acid (MCA) kapena mchere wake wa sodium, sodium monochloroacetate (SMCA), pamaso pa chothandizira pansi pa mikhalidwe yolamulidwa. Kuyankha kwa etherification kumeneku kumaphatikizapo kusintha magulu a hydroxyl pa unyolo wa cellulose ndi magulu a carboxymethyl (-CH2COONa). Mlingo wa kusintha (DS), womwe umayimira chiwerengero chapakati cha magulu a carboxymethyl pa unit iliyonse ya unyolo wa cellulose, ukhoza kulamulidwa mwa kusintha magawo a reaction monga kutentha, nthawi ya reaction, ndi kuchuluka kwa reactant.
4. Kuletsa: Pambuyo pa etherification reaction, mankhwala omwe amachokera amasinthidwa kuti asinthe magulu ena aliwonse a acidic kukhala sodium salt (carboxymethylcellulose sodium). Izi zimachitika nthawi zambiri powonjezera yankho la alkaline, monga sodium hydroxide (NaOH), ku reaction mix. Kuletsa kumathandizanso kusintha pH ya yankho ndikukhazikitsa CMC product.
5. Kuyeretsa: Sodium carboxymethylcellulose yosakonzedwa imayeretsedwa kuti ichotse zonyansa, zinthu zosakhudzidwa, ndi zinthu zina kuchokera ku chisakanizo cha reaction. Njira zoyeretsera zitha kuphatikizapo kutsuka, kusefa, kugawa centrifugation, ndi kuumitsa. CMC yoyeretsedwa nthawi zambiri imatsukidwa ndi madzi kuti ichotse alkali yotsala ndi mchere, kenako kusefa kapena kugawa centrifugation kuti ilekanitse chinthu cholimba cha CMC ndi gawo lamadzimadzi.
6. Kuumitsa: Sodium carboxymethylcellulose yoyeretsedwa imauma pomaliza kuti ichotse chinyezi chochulukirapo ndikupeza chinyezi chomwe mukufuna kuti chisungidwe ndikukonzedwanso. Njira zowumitsa zitha kuphatikizapo kuumitsa mpweya, kuumitsa popopera, kapena kuumitsa ng'oma, kutengera mawonekedwe a chinthu chomwe mukufuna komanso kukula kwa chinthu chomwe mwapanga.

Chopangidwa ndi sodium carboxymethylcellulose chomwe chimachokera ku izi ndi ufa woyera kapena wopangidwa ndi tinthu tating'onoting'ono tomwe timasungunuka bwino m'madzi komanso timathandiza kwambiri pa matenda a m'mitsempha. Chimagwiritsidwa ntchito kwambiri ngati chowonjezera kukhuthala, chokhazikika, chomangirira, komanso chosintha matenda a m'mitsempha m'mafakitale osiyanasiyana, kuphatikizapo chakudya, mankhwala, zodzoladzola, nsalu, ndi mafakitale.