Sodium Carboxymethyl cellulose |9000-11-7

Carboxy methyl cellulose (CMC) kapena cellulose chingamu ndi chochokera ku cellulose ndi magulu a carboxymethyl (-CH2-COOH) omangika kumagulu ena a hydroxyl a glucopyranose monomers omwe amapanga cellulose msana.Nthawi zambiri amagwiritsidwa ntchito ngati mchere wake wa sodium, sodium carboxymethyl cellulose.

Amapangidwa ndi alkali-catalyzed reaction ya cellulose ndi chloroacetic acid.Magulu a polar (organic acid) a carboxyl amapangitsa cellulose kusungunuka komanso kuchitapo kanthu.Zomwe zimagwira ntchito za CMC zimadalira kuchuluka kwa m'malo mwa cellulose (mwachitsanzo, ndi magulu angati a hydroxyl omwe adatengapo gawo pakusinthana), komanso kutalika kwa unyolo wa kapangidwe ka cellulose msana ndi kuchuluka kwa masango. zotsalira za carboxymethyl.

UsesCMC imagwiritsidwa ntchito mu sayansi yazakudya monga chosinthira kukhuthala kapena thickener, ndikukhazikitsa ma emulsions pazinthu zosiyanasiyana kuphatikiza ayisikilimu.Monga chowonjezera cha chakudya, ili ndi E466.Ndiwopangidwanso ndi zinthu zambiri zomwe sizimadya, monga KY Jelly, mankhwala otsukira mano, mankhwala ofewetsa thukuta, mapiritsi opatsa thanzi, utoto wotengera madzi, zotsukira, kukula kwa nsalu ndi mapepala osiyanasiyana.Amagwiritsidwa ntchito makamaka chifukwa ali ndi kukhuthala kwakukulu, alibe poizoni, komanso hypoallergenic.M'zotsukira zovala zimagwiritsidwa ntchito ngati polima woyimitsa dothi wopangidwa kuti aziyika pa thonje ndi nsalu zina za cellulosic kupanga chotchinga chotchinga dothi chotsukira.CMC imagwiritsidwa ntchito ngati mafuta m'maso osasunthika (misozi yochita kupanga).Nthawi zina ndi methyl cellulose (MC) yomwe imagwiritsidwa ntchito, koma magulu ake a non-polar methyl (-CH3) samawonjezera kusungunuka kulikonse kapena kuchitapo kanthu kwa mankhwala ku cellulose yoyambira.

Kutsatira zomwe poyamba kusakaniza kumapanga pafupifupi 60% CMC kuphatikiza 40% mchere (sodium kolorayidi ndi sodium glycolate).Izi ndi zomwe zimatchedwa Technical CMC yomwe imagwiritsidwa ntchito mu zotsukira.Njira ina yoyeretsera imagwiritsidwa ntchito pochotsa mcherewu kuti apange CMC yoyera yomwe imagwiritsidwa ntchito ngati chakudya, mankhwala ndi dentifrice (mankhwala otsukira mano).Kalasi yapakatikati ya "semi-purified" imapangidwanso, yomwe imagwiritsidwa ntchito pamapepala.

CMC imagwiritsidwanso ntchito muzamankhwala ngati thickening wothandizira.CMC imagwiritsidwanso ntchito pobowola mafuta ngati chopangira pobowola matope, pomwe imagwira ntchito ngati viscosity modifier ndi kusunga madzi.Poly-anionic cellulose kapena PAC imachokera ku cellulose ndipo imagwiritsidwanso ntchito muzochita zamafuta.CMC ndithudi ndi Carboxylic Acid, kumene PAC ndi Ether.CMC ndi PAC, ngakhale amapangidwa kuchokera ku zipangizo zomwezo (ma cellulose, kuchuluka ndi mtundu wa zipangizo zomwe zimagwiritsidwa ntchito zimatsogolera zinthu zosiyana zomaliza. Kusiyana koyamba ndi kotsogola pakati pa CMC ndi PAC kulipo pa sitepe ya radicalization. CarboxyMethyl Cellulose (CMC) ndi mankhwala komanso amasiyanitsidwa ndi Polyanionic Cellulose.

Insoluble microgranular carboxymethyl cellulose imagwiritsidwa ntchito ngati cation-exchange resin mu ion-exchange chromatography pofuna kuyeretsa Mapuloteni. mapuloteni opangidwa.

CMC imagwiritsidwanso ntchito m'mipaketi ya ayezi kupanga chisakanizo cha eutectic chomwe chimapangitsa kuti pakhale kuzizira kocheperako komanso kuzizira kwambiri kuposa ayezi.

Njira zamadzimadzi CMC zagwiritsidwanso ntchito kufalitsa ma nanotubes a kaboni.Zimaganiziridwa kuti mamolekyu aatali a CMC amazungulira ma nanotubes, kuwalola kuti abalalitsidwe m'madzi.

EnzymologyCMC yagwiritsidwanso ntchito kwambiri kuwonetsa zochitika za enzyme kuchokera ku endoglucanase (gawo la cellulase complex).CMC ndi gawo laling'ono lapadera la ma cellulase omwe amagwira ntchito ngati endo-acting cellulases popeza mawonekedwe ake adapangidwa kuti asungunuke ma cellulose ndikupanga masamba aamorphous omwe ali oyenera kuchitapo kanthu kwa endglucanase.CMC ndi yofunika chifukwa catalysis mankhwala (glucose) mosavuta kuyeza ntchito kuchepetsa shuga assay monga 3,5-Dinitrosalicylic acid.Kugwiritsa ntchito CMC pakuyesa ma enzyme ndikofunikira kwambiri pakuwunika ma enzymes a cellulase omwe amafunikira kuti pakhale kusintha kwabwino kwa cellulosic ethanol.Komabe, CMC idagwiritsidwanso ntchito molakwika pantchito zam'mbuyomu ndi ma enzymes a cellulase popeza ambiri adagwirizanitsa zochitika zonse za cellulase ndi CMC hydrolysis.Monga limagwirira wa cellulose depolymerization wayamba kumvetsa, tisaiwale kuti exo-maselo amphamvu kwambiri mu kuwonongeka kwa crystalline (mwachitsanzo Avicel) osati sungunuka (mwachitsanzo CMC) mapadi.