Carboxymethyl cellulose (CMC) imapezeka pambuyo pa carboxymethylation ya cellulose. Njira yake yamadzimadzi imakhala ndi ntchito za thickening, kupanga mafilimu, kugwirizanitsa, kusunga madzi, kuteteza colloid, emulsification ndi kuyimitsidwa, ndipo imagwiritsidwa ntchito kwambiri mu mafuta, chakudya, mankhwala, etc. Ma cellulose ethers.Ma cellulose achilengedwe ndi ma polysaccharide omwe amafalitsidwa kwambiri komanso ochuluka kwambiri m'chilengedwe, ndipo magwero ake ndi ambiri. wolemera. Ukadaulo wamakono wosinthika wa cellulose umayang'ana kwambiri etherification ndi esterification. Carboxymethylation ndi mtundu waukadaulo wa etherification.
katundu wakuthupi
Sodium carboxymethyl mapadi (CMC) ndi anionic mapadi efa, ndi woyera kapena pang'ono chikasu flocculent CHIKWANGWANI ufa kapena woyera ufa maonekedwe, fungo, zoipa, sanali poizoni; mosavuta sungunuka m'madzi ozizira kapena madzi otentha, kupanga ena mamasukidwe akayendedwe bwino njira. Yankho lake ndi ndale kapena pang'ono zamchere, insoluble mu Mowa, etha, isopropanol, acetone ndi zina zosungunulira organic, sungunuka mu 60% madzi munali Mowa kapena acetone njira. Ndi hygroscopic, yosasunthika pakuwala ndi kutentha, kukhuthala kumachepa ndi kuwonjezeka kwa kutentha, yankho limakhala lokhazikika pa pH 2-10, pH ndilotsika kuposa 2, pali mvula yolimba, ndipo kukhuthala kumachepa pamene pH ili pamwamba kuposa 10. Kutentha kwa kutentha ndi 227 ℃, kutentha kwa carbonization ndi 252 ℃, ndi kusagwirizana kwa 2% yamadzimadzi ndi 2%. 71mn/n.
mankhwala katundu
Amapangidwa kuchokera ku cellulose zotumphukira za carboxymethyl, pochiza mapadi ndi sodium hydroxide kupanga alkali cellulose, kenako amachita ndi monochloroacetic acid. Glucose unit yomwe imapanga cellulose ili ndi magulu atatu a hydroxyl omwe amatha kusinthidwa, kotero kuti zogulitsa zokhala ndi magawo osiyanasiyana zitha kupezeka. Pa avareji, 1 mmol ya carboxymethyl idayambitsidwa pa 1 g ya kulemera kowuma, komwe sikusungunuka m'madzi ndi kusungunula asidi, koma kumatha kutupa ndikugwiritsa ntchito chromatography ya ion. Carboxymethyl pKa ndi pafupifupi 4 m'madzi oyera ndi pafupifupi 3.5 mu 0.5mol/L NaCl. Ndiwosintha pang'ono acidic cation exchanger ndipo nthawi zambiri amagwiritsidwa ntchito pakulekanitsa ma protein osalowerera komanso ofunikira pa pH> 4. Zoposa 40% zamagulu a hydroxyl amasinthidwa ndi magulu a carboxymethyl, omwe amatha kusungunuka m'madzi kuti apange njira yokhazikika ya colloidal high-viscosity.
Cholinga chachikulu
Carboxymethyl cellulose (CMC) ndi ufa wosalala wopanda poizoni komanso wopanda fungo womwe umagwira bwino ntchito ndipo umasungunuka mosavuta m'madzi. Yake amadzimadzi njira ndi ndale kapena zamchere mandala viscous madzi, sungunuka mu zomatira madzi sungunuka ndi utomoni, ndi insoluble. mu zosungunulira za organic monga ethanol. CMC angagwiritsidwe ntchito monga zomatira, thickener, suspending wothandizira, emulsifier, dispersant, stabilizer, sizing wothandizira, etc.
Sodium carboxymethyl mapadi (CMC) ndi mankhwala ndi linanena bungwe lalikulu, ambiri ankagwiritsa ntchito komanso yosavuta kugwiritsa ntchito pakati pa mapadi ethers, amene amadziwika kuti "industrial monosodium glutamate".
1. Amagwiritsidwa ntchito pobowola mafuta ndi gasi, kukumba bwino ndi ntchito zina
① Matope okhala ndi CMC amatha kupanga khoma lachitsime kukhala keke yopyapyala komanso yolimba yokhala ndi kutsika kochepa, komwe kumachepetsa kutayika kwa madzi.
② Pambuyo powonjezera CMC m'matope, chobowoleracho chikhoza kupeza mphamvu yochepetsetsa yoyambira, kotero kuti matope amatha kumasula mpweya wokulungidwa mmenemo, ndipo panthawi imodzimodziyo, zinyalala zimatayidwa mwamsanga mu dzenje lamatope.
③Kubowola matope, monga mabala ena oyimitsidwa, amakhala ndi nthawi yokhazikika, ndipo kuwonjezera kwa CMC kumatha kupangitsa kuti ikhale yokhazikika ndikutalikitsa nthawi yokhalapo.
④ Matope okhala ndi CMC samakhudzidwa kawirikawiri ndi nkhungu, kotero sikoyenera kukhala ndi pH yamtengo wapatali ndikugwiritsa ntchito zoteteza.
⑤ Muli ndi CMC ngati kubowola matope kutsuka madzimadzi mankhwala wothandizira, amene angathe kukana kuipitsa zosiyanasiyana sungunuka mchere.
⑥ Matope okhala ndi CMC amakhala okhazikika bwino ndipo amatha kuchepetsa kutaya kwa madzi ngakhale kutentha kuli pamwamba pa 150 ℃.
CMC ndi mamasukidwe akayendedwe mkulu ndi digiri mkulu m'malo ndi oyenera matope ndi otsika kachulukidwe, ndi CMC ndi kukhuthala otsika ndi digiri mkulu m'malo ndi oyenera matope ndi kachulukidwe mkulu. Kusankhidwa kwa CMC kuyenera kutsimikiziridwa molingana ndi mikhalidwe yosiyanasiyana monga mtundu wamatope, dera komanso kuya kwachitsime.
2. Amagwiritsidwa ntchito m'makampani opanga nsalu, osindikizira ndi opaka utoto. Makampani opanga nsalu amagwiritsa ntchito CMC ngati njira yopangira ulusi wopepuka wa thonje, ubweya wa silika, ulusi wamankhwala, wosakanikirana ndi zida zina zolimba;
3. Ntchito pepala makampani CMC angagwiritsidwe ntchito ngati pepala pamwamba kusalaza wothandizila ndi sizing wothandizila mu makampani pepala. Kuonjezera 0.1% mpaka 0.3% CMC ku zamkati kungapangitse mphamvu yamakokedwe ya pepala ndi 40% mpaka 50%, kuonjezera kupasuka kwapakatikati ndi 50%, ndikuwonjezera kneadability ndi 4 mpaka 5.
4. CMC angagwiritsidwe ntchito ngati dothi adsorbent pamene anawonjezera zotsukira kupanga; mankhwala tsiku lililonse monga makampani otsukira mano CMC glycerin amadzimadzi njira ntchito ngati chingamu m'munsi kwa otsukira mano; makampani opanga mankhwala amagwiritsidwa ntchito ngati thickener ndi emulsifier; CMC amadzimadzi yothetsera ndi unakhuthala ndi ntchito zoyandama processing mchere, etc.
5. M'makampani a ceramic, angagwiritsidwe ntchito ngati zomatira, plasticizer, suspending agent for glaze, color fixing agent, etc.
6. Amagwiritsidwa ntchito pomanga kuti apititse patsogolo kusunga madzi ndi mphamvu
7. Amagwiritsidwa ntchito popanga zakudya. Makampani chakudya ntchito CMC ndi mkulu m'malo digiri monga thickener kwa ayisikilimu, chakudya zamzitini, Zakudyazi mwamsanga yophika, ndi thovu stabilizer kwa mowa, etc. Pakuti thickeners, binders kapena excipients.
8. Makampani opanga mankhwala amasankha CMC yokhala ndi mamasukidwe oyenera ngati chomangira piritsi, chophatikizira, ndi kuyimitsa wothandizira kuyimitsidwa.
Nthawi yotumiza: Nov-03-2022