Carboxymethyl cellulose (sodium carboxyme akoll cellulose, CMC) ndi chotupa cha celloluse, ndipo ndiye chingamu chofunikira kwambiri cha cuonic kwambiri.
Nthawi zambiri cmc nthawi zambiri imakhala yophika poitymer yokonzedwa ndikugwira cellulose yachilengedwe yokhala ndi caustic alkalilsi alkali ndi monochloroortic acid. Kulemera kwa kuchuluka kwa mtengo kumasiyananso kwa anthu pafupifupi mamiliyoni angapo.
CMC ili mu kusintha kwa cellulose yachilengedwe, komanso bungwe la chakudya ndi zaulimi wa United Nations ndi World Health Organisation (ndani) adazitcha "cellulose yosinthidwa". Njira ya synthesis ya sodium carboxymethyl adapangidwa ndi Germany E. Jansen mu 1918, ndipo idadziwika ku Europe, kenako idadziwika ku Europe.
CMC imagwiritsidwa ntchito kwambiri ku petroleum, matenda a geological, tsiku lililonse mankhwala, chakudya, mafakitale opanga mankhwala, omwe amatchedwa "mafakitale monodium glutate".
Zojambula za CMC
CMC ndi ufa woyera kapena wopepuka wachikasu, granur kapena fibruus wolimba. Ndi mankhwala onunkhira mankhwala omwe amatha kumwa madzi ndikutupa. Ikamakhala m'madzi, imatha kupanga guluu lowoneka bwino. Ph wa kuyimitsidwa kwamadzi ndi 6.5-8.5. Thupi limakhala lopanda mphamvu monga ethanol, ether, acetone ndi chloroform.
CMC yolimba imakhala yokhazikika mpaka kutentha komanso firiji, ndipo imatha kusungidwa kwa nthawi yayitali pamalo owuma. CMC ndi mtundu wa ether ether, nthawi zambiri zimapangidwa ndi zotupa za thonje (cellulose zomwe zilipo mpaka 98%) kapena zamkati, zonunkhira bwino, zolemera za pawiri ndi 6400 (± 1000). Nthawi zambiri pamakhala njira ziwiri zokonzekera: Njira ya malasha ndi zosungunulira madzi. Palinso chomera china chomera chomwe chimagwiritsidwa ntchito kukonza cmc.
Mawonekedwe ndi ntchito
CMC siyongopanda kukhazikika kwa emulsifider ndikukula m'mapulogalamu azakudya, komanso kukhazikika kwabwino kwambiri komanso kusungunuka bwino komanso kusungunuka, ndipo kumatha kukonza zonunkhira, ndipo kumatha kukonza kununkhira kwa malonda ndikuthandizira nthawi yosungirako.
Mu 1974, bungwe la chakudya ndi zaulimi wa United Nations ndi World Health Organisation (omwe) adavomereza kugwiritsa ntchito CMC yoyera ikatha kukhala ndi chinsinsi komanso mayeso. Kudya bwino (Adi) ya International Standard ndi 25mg / kg thupi / tsiku.
Kukhazikika kwamphamvu ndi emulsion
Kudya cmc kumatha kufalikira ndikukhazikika zakumwa zonenepa komanso mapuloteni. Izi ndichifukwa choti CMC imakhala cololod yokhazikika atasungunuka m'madzi, ndipo tinthu timene timapanga ma protein kukhala tinthu tating'onoting'ono tomwe timatetezedwa ndi ma protein. Ili ndi vuto linalake, motero limatha kuchepetsa kuchepa kwa mafuta pakati pa mafuta ndi madzi nthawi yomweyo, kotero kuti mafuta atha kukhala odetsedwa.
CMC imatha kusintha kukhazikika kwa chinthucho, chifukwa nthawi yomwe pH ya mankhwalawa imachoka ku isoelertc points cellose imatha kupanga kapangidwe kake ndi mapuloteni, omwe amatha kusintha kukhazikika kwa malonda.
Kuchuluka
Kugwiritsa ntchito cmc mu ayisikilimu kumatha kuwonjezera kuchuluka kwa ayisikilimu, kusintha liwiro losungunuka, kupereka mawonekedwe abwino ndikukula kwa makhiristo a Ice Kupita paulendo ndikusungirako. Kuchuluka komwe kumagwiritsidwa ntchito ndi 0,5% yonse yowonjezera.
Izi ndichifukwa choti CMC ili ndi madzi abwino osapumira, ndipo mobwerezabwereza zimaphatikiza mapuloteni, ndipo ma glocbules onenepa, ndi mamolekyulu amadzi mu colloid kuti apange yunifolomu komanso yokhazikika.
Hydrophilicity ndi Fhydration
Katunduyu wa CMC amagwiritsidwa ntchito popanga mkate, womwe ungapangitse yunifolomu ya uchi, onjezerani voliyumu, amachepetsa mafuta, komanso amakhala ndi mphamvu; Zakudyazi zowonjezeredwa ndi cmc zimakhala ndi madzi abwino okhala ndi mphamvu, kuphika kukana, ndi kukoma kwabwino.
Izi zimatsimikiziridwa ndi kapangidwe ka masentimita, yomwe ndi ma cellulose omwe ali ndi ma cyrophilic ambiri a hydrophilic mu ma moleculalamu chowoneka bwino.
gelation
Thixotropic CMC ikutanthauza kuti ma unyolo a macrorolecular amakhala ndi zochitika zingapo ndipo amakonda kupanga mawonekedwe atatu. Pambuyo pa mawonekedwe atatuwo amapangidwa, mafayilo amakonzera, ndipo pambuyo poti mawonekedwe atatuwo athyoledwa, ma virus akuchepa. Chiwonetsero cha Phenomenon ndichakuti kusintha kwa mafalo kumadalira nthawi.
Thixotropic CMC imagwira gawo lofunikira mu dongosolo logawanika ndipo lingagwiritsidwe ntchito kupanga zakudya, kupanikizana ndi zakudya zina.
Itha kugwiritsidwa ntchito ngati cholepheretsa, chiwombaka chithonde, kuchuluka pakamwa
CMC itha kugwiritsidwa ntchito ngati kupanga vinyo kuti mupange kukoma kwambiri komanso wolemera ndi khrartaste wautali; Itha kugwiritsidwa ntchito ngati khola la thovu mwa mowa kupanga chithovu kuti chikhale chouma komanso nthawi yayitali komanso kukonza kukoma.
CMC ndi mtundu wa polydeletrolyte, zomwe zitha kutenga nawo mbali zosiyanasiyana mu vinyo kuti musunge thupi la vinyo. Nthawi yomweyo, imaphatikizanso makhiristo omwe apanga, kusintha kapangidwe ka ma kristalo, kusintha zinthu zokhalapo. Kuphatikizika kwa zinthu.
Post Nthawi: Feb-14-2025