Carboxymethyl cellulose (CMC) imapezeka pambuyo pa carboxymethylation ya cellulose. Yankho lake lamadzi lili ndi ntchito zokhuthala, kupanga filimu, kulumikiza, kusunga madzi, kuteteza colloid, emulsification ndi suspension, ndipo imagwiritsidwa ntchito kwambiri m'mafuta, chakudya, mankhwala, ndi zina zotero, mafakitale a nsalu ndi mapepala, ndi imodzi mwa ma ether ofunikira kwambiri a cellulose. Cellulose yachilengedwe ndi polysaccharide yofalikira kwambiri komanso yochuluka kwambiri m'chilengedwe, ndipo magwero ake ndi olemera kwambiri. Ukadaulo wamakono wosintha cellulose umayang'ana kwambiri pa etherification ndi esterification. Carboxymethylation ndi mtundu wa ukadaulo wa etherification.
makhalidwe enieni
Sodium carboxymethyl cellulose (CMC) ndi anionic cellulose ether, yokhala ndi ufa woyera kapena wachikasu pang'ono wa ulusi wosalala kapena wooneka ngati ufa woyera, wopanda fungo, wopanda kukoma, wopanda poizoni; imasungunuka mosavuta m'madzi ozizira kapena m'madzi otentha, ndikupanga yankho linalake loyera la viscosity. Yankholi ndi lopanda mbali kapena la alkaline pang'ono, silisungunuka mu ethanol, ether, isopropanol, acetone ndi zosungunulira zina zachilengedwe, limasungunuka mu 60% ya ethanol kapena acetone yokhala ndi madzi. Ndi losasinthasintha, lokhazikika ku kuwala ndi kutentha, viscosity imachepa ndi kutentha komwe kumawonjezeka, yankholi ndi lokhazikika pa pH 2-10, pH ndi yotsika kuposa 2, pali mvula yolimba, ndipo viscosity imachepa pamene pH ndi yokwera kuposa 10. Kutentha kwa mtundu ndi 227℃, kutentha kwa carbonization ndi 252℃, ndipo mphamvu ya pamwamba ya yankho la madzi la 2% ndi 71mn/n.
katundu wa mankhwala
Imakonzedwa kuchokera ku zinthu zochokera ku cellulose zomwe zimalowa m'malo mwa carboxymethyl, zomwe zimathandiza cellulose ndi sodium hydroxide kuti ipange alkali cellulose, kenako n’kuchita ndi monochloroacetic acid. Gulu la shuga lomwe limapanga cellulose lili ndi magulu atatu a hydroxyl omwe angalowe m'malo, kotero zinthu zomwe zili ndi madigiri osiyanasiyana osinthira zitha kupezeka. Pa avareji, 1 mmol ya carboxymethyl idalowetsedwa pa 1 g ya kulemera kouma, komwe sikusungunuka m'madzi ndi asidi wosungunuka, koma kumatha kufufuma ndikugwiritsidwa ntchito pa ion exchange chromatography. Carboxymethyl pKa ndi pafupifupi 4 m'madzi oyera ndipo pafupifupi 3.5 mu 0.5mol/L NaCl. Ndi chosinthira cation chofooka ndipo nthawi zambiri chimagwiritsidwa ntchito polekanitsa mapuloteni osalowerera komanso oyambira pa pH>4. Magulu opitilira 40% a hydroxyl amalowetsedwa m'malo ndi magulu a carboxymethyl, omwe amatha kusungunuka m'madzi kuti apange yankho lokhazikika la colloidal lamphamvu kwambiri.
Cholinga chachikulu
Carboxymethyl cellulose (CMC) ndi ufa woyera wopanda poizoni komanso wopanda fungo ndipo umagwira ntchito bwino ndipo umasungunuka mosavuta m'madzi. Madzi ake ndi madzi owoneka bwino komanso owoneka bwino, osungunuka mu guluu ndi ma resin ena osungunuka m'madzi, komanso osasungunuka mu zinthu zachilengedwe monga ethanol. CMC ingagwiritsidwe ntchito ngati guluu, chokhuthala, choyimitsa, chosungunula, chosungunula, chokhazikika, ndi zina zotero.
Sodium carboxymethyl cellulose (CMC) ndi chinthu chomwe chimatulutsa mphamvu zambiri, chomwe chimagwiritsidwa ntchito kwambiri komanso chosavuta kugwiritsa ntchito pakati pa ma ether a cellulose, omwe amadziwika kuti "industrial monosodium glutamate".
1. Amagwiritsidwa ntchito pobowola mafuta ndi gasi lachilengedwe, kukumba zitsime ndi ntchito zina
① Matope okhala ndi CMC angapangitse khoma la chitsime kukhala keke yopyapyala komanso yolimba yokhala ndi madzi ochepa, zomwe zimachepetsa kutaya madzi.
② Pambuyo powonjezera CMC ku matope, chobowoleracho chingapeze mphamvu yochepa yoyambira yochekera, kotero kuti matopewo amatha kutulutsa mosavuta mpweya womwe wakulungidwamo, ndipo nthawi yomweyo, zinyalalazo zimatayidwa mwachangu m'dzenje la matope.
③Matope obowola, monga ma suspension dispersions ena, amakhala ndi nthawi inayake, ndipo kuwonjezera CMC kungapangitse kuti ikhale yokhazikika ndikuwonjezera nthawi yokhazikika.
④ Matope okhala ndi CMC sakhudzidwa kawirikawiri ndi nkhungu, kotero sikofunikira kusunga pH yapamwamba ndikugwiritsa ntchito zosungira.
⑤ Muli CMC ngati chotsukira madzi oyeretsera matope, chomwe chingalepheretse kuipitsidwa kwa mchere wosiyanasiyana wosungunuka.
⑥ Matope okhala ndi CMC ali ndi kukhazikika bwino ndipo amatha kuchepetsa kutayika kwa madzi ngakhale kutentha kuli pamwamba pa 150℃.
CMC yokhala ndi kukhuthala kwakukulu komanso kusinthasintha kwakukulu ndi yoyenera matope okhala ndi kukhuthala kochepa, ndipo CMC yokhala ndi kukhuthala kochepa komanso kusinthasintha kwakukulu ndi yoyenera matope okhala ndi kukhuthala kwakukulu. Kusankha CMC kuyenera kutsimikiziridwa malinga ndi mikhalidwe yosiyanasiyana monga mtundu wa matope, dera ndi kuya kwa chitsime.
2. Amagwiritsidwa ntchito mu makampani opanga nsalu, kusindikiza ndi kuyika utoto. Makampani opanga nsalu amagwiritsa ntchito CMC ngati chida choyezera kukula kwa ulusi wopepuka wa thonje, ubweya wa silika, ulusi wa mankhwala, zosakaniza ndi zina zolimba;
3. CMC yogwiritsidwa ntchito mumakampani opanga mapepala ingagwiritsidwe ntchito ngati choyeretsera pamwamba pa pepala komanso choyeretsera kukula kwa pepala mumakampani opanga mapepala. Kuwonjezera 0.1% mpaka 0.3% CMC ku zamkati kungapangitse kuti pepala likhale lolimba ndi 40% mpaka 50%, kuwonjezera kuphulika kwa compression ndi 50%, ndikuwonjezera kukanda ndi nthawi 4 mpaka 5.
4. CMC ingagwiritsidwe ntchito ngati chokometsera dothi ikawonjezedwa ku sopo wopangidwa; mankhwala a tsiku ndi tsiku monga makampani opanga mano. CMC glycerin aqueous solution imagwiritsidwa ntchito ngati maziko a chingamu cha mano otsukira mano; makampani opanga mankhwala amagwiritsidwa ntchito ngati chokhuthala ndi chosakaniza; CMC aqueous solution imakhuthala ndikugwiritsidwa ntchito pokonza mchere woyandama, ndi zina zotero.
5. Mu makampani opanga zinthu zadothi, ingagwiritsidwe ntchito ngati guluu, pulasitiki, choyimitsa glaze, chokonzera utoto, ndi zina zotero.
6. Amagwiritsidwa ntchito pomanga kuti awonjezere kusunga madzi ndi mphamvu
7. Imagwiritsidwa ntchito mumakampani opanga chakudya. Makampani opanga chakudya amagwiritsa ntchito CMC yokhala ndi digiri yapamwamba kwambiri ngati chokhuthala cha ayisikilimu, chakudya cham'zitini, Zakudya zophikidwa mwachangu, ndi choziziritsira thovu cha mowa, ndi zina zotero. Kwa zokhuthala, zomangira kapena zowonjezera.
8. Makampani opanga mankhwala amasankha CMC yokhala ndi kukhuthala koyenera ngati chomangira mapiritsi, chochotsa mankhwala, komanso choyimitsa mankhwala oletsa kusuta.
Nthawi yotumizira: Novembala-03-2022