Kodi sodium carboxymethylcellulose ndi chiyani?

Sodium carboxymethylcellulose(CMC) ndi anionic cellulose ether. Maonekedwe ake ndi oyera kapena achikasu pang'ono flocculent CHIKWANGWANI ufa kapena woyera ufa, odorless, zoipa, ndi sanali poizoni; imasungunuka mosavuta m'madzi ozizira kapena otentha ndipo imapanga kukhuthala kwina. njira yowonekera. Yankho lake ndi ndale kapena pang'ono zamchere, insoluble mu Mowa, efa, isopropanol, acetone ndi zina zosungunulira organic, koma sungunuka 60% Mowa kapena acetone njira. Ndi hygroscopic komanso yokhazikika pakuwala komanso kutentha. The mamasukidwe akayendedwe amachepetsa ndi kuwonjezeka kutentha. Yankho lake ndi lokhazikika pa pH 2-10. Pamene pH ili pansi kuposa 2, zolimba zimayamba. Pamene pH ili pamwamba kuposa 10, kukhuthala kumachepa. Kutentha kwamtundu ndi 227 ° C, kutentha kwa carbonization ndi 252 ° C, ndipo kugwedezeka kwa 2% yamadzimadzi ndi 71mn / n.

mankhwala katundu

Amapezeka pochiza cellulose ndi carboxymethyl substituents, kuchitira cellulose ndi sodium hydroxide kupanga alkali cellulose, kenako kuchitapo kanthu ndi monochloroacetic acid. Glucose unit yomwe imapanga cellulose ili ndi magulu atatu a hydroxyl omwe angasinthidwe, kotero kuti zinthu zomwe zimakhala ndi magawo osiyanasiyana zimatha kupezeka. Pafupifupi, 1mmol ya gulu la carboxymethyl pa 1g ya kulemera kowuma sisungunuka m'madzi ndi kusungunula asidi, koma imatha kutupa ndikugwiritsidwa ntchito posinthanitsa ndi 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

Carboxymethylcellulose (CMC) ndi wopanda poizoni, wopanda fungo woyera flocculent ufa ndi ntchito yokhazikika ndipo amasungunuka mosavuta m'madzi. Yake amadzimadzi njira ndi ndale kapena zamchere mandala viscous madzi, sungunuka mu zomatira madzi sungunuka ndi utomoni, ndi insoluble mu organic solvents monga Mowa. CMC angagwiritsidwe ntchito ngati binder, thickener, suspending wothandizira, emulsifier, dispersant, stabilizer, sizing wothandizira, etc.

Sodium carboxymethyl cellulose (CMC) ndi mankhwala omwe ali ndi zotsatira zazikulu kwambiri, zogwiritsidwa ntchito kwambiri komanso zogwiritsidwa ntchito mosavuta pakati pa ma cellulose ethers, omwe 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 yolimba komanso yocheperako, kuchepetsa 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 zimatha kutayidwa mwamsanga mu dzenje lamatope.

③ Kubowola matope, monga kuyimitsidwa kwina ndi kubalalitsidwa, kumakhala ndi nthawi yayitali. Kuwonjezera CMC kumatha kupangitsa kuti ikhale yokhazikika ndikutalikitsa moyo wa alumali.

④ Matope okhala ndi CMC sakhudzidwa kawirikawiri ndi nkhungu, chifukwa chake sikofunikira kusunga pH yamtengo wapatali ndikugwiritsa ntchito zoteteza.

⑤ Muli CMC ngati wothandizira pobowola matope otulutsa madzimadzi, omwe amatha kukana kuipitsidwa ndi mchere wosungunuka wosiyanasiyana.

⑥ Matope okhala ndi CMC amakhala okhazikika bwino ndipo amatha kuchepetsa kutaya kwa madzi ngakhale kutentha kuli kopitilira 150 ° C.

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 malinga ndi mikhalidwe yosiyanasiyana monga mtundu wamatope, dera, ndi kuya kwachitsime.

2. Amagwiritsidwa ntchito m'mafakitale opangira nsalu, osindikizira ndi opaka utoto. M'makampani opanga nsalu, CMC imagwiritsidwa ntchito ngati chida choyezera ulusi wopepuka wa thonje, ubweya wa silika, ulusi wamankhwala, wosakanikirana ndi zida zina zolimba;

3. Ntchito mu makampani pepala CMC angagwiritsidwe ntchito ngati pepala kusalaza wothandizila ndi sizing wothandizila mu makampani pepala. Kuonjezera 0.1% mpaka 0.3% ya CMC mu zamkati kungathe kuonjezera mphamvu yolimba ya pepala ndi 40% mpaka 50%, kuonjezera kukana kwa mng'alu ndi 50%, ndikuwonjezera katundu wokanda ndi 4 mpaka 5.

4. CMC angagwiritsidwe ntchito ngati dothi adsorbent pamene anawonjezera zotsukira kupanga; mankhwala tsiku ndi tsiku monga makampani otsukira mano CMC glycerol amadzimadzi njira ntchito ngati mankhwala otsukira mano m`munsi; makampani opanga mankhwala amagwiritsidwa ntchito ngati thickener ndi emulsifier; CMC amadzimadzi njira ntchito ngati zoyandama pambuyo thickening Migodi ndi zina zotero.

5. Ikhoza kugwiritsidwa ntchito monga zomatira, plasticizer, suspending agent of glaze, color fixing agent, etc. mu makampani a ceramic.

6. Amagwiritsidwa ntchito pomanga kuti apititse patsogolo kusunga madzi ndi mphamvu

7. Amagwiritsidwa ntchito m'makampani azakudya. Makampani azakudya amagwiritsa ntchito CMC yokhala ndi m'malo ambiri monga chowonjezera cha ayisikilimu, chakudya cham'chitini, Zakudyazi pompopompo, komanso chowongolera thovu la mowa. Kwa thickeners, binders kapena conformal agents.

8. The makampani mankhwala amasankha CMC ndi mamasukidwe akayendedwe koyenera monga binder, disintegrating wothandizila mapiritsi, ndi suspending wothandizira suspensions, etc.