Carboxymethyl cellulose (CMC) inowanikwa mushure me carboxymethylation ye cellulose. Mushonga waro wemvura une mabasa ekukora, kugadzira firimu, kubatana, kuchengetedza mvura, kudzivirira kwecolloid, emulsification uye kumiswa, uye inoshandiswa zvakanyanya mumafuta epetroleum, chikafu, mishonga, nezvimwewo, maindasitiri emachira nemapepa, ndechimwe chezvinhu zvakakosha. cellulose ethers.Natural cellulose ndiyo inonyanya kuparadzirwa uye kuwanda kwepolysaccharide muzvisikwa, uye masosi ayo akanyanya. mupfumi. Iyo yazvino yekugadziridza tekinoroji ye cellulose inonyanya kutarisa etherification uye esterification. Carboxymethylation imhando ye etherification tekinoroji.
zvinhu zvemuviri
Sodium carboxymethyl cellulose (CMC) is an anionic cellulose ether, ine chena kana zvishoma yero flocculent faibha upfu kana chena hupfu hunoratidzika, husinganhuhwi, husina kunaka, husina chepfu; inonyungudika nyore mumvura inotonhora kana mvura inopisa, ichigadzira imwe viscosity yakajeka mhinduro. Mushonga wacho hauna kwawakarerekera kana kuti zvishoma alkaline, usingagadzirike mu ethanol, ether, isopropanol, acetone uye mamwe organic solvents, soluble mu 60% mvura-ine ethanol kana acetone solution. Iine hygroscopic, yakagadzikana kuchiedza nekupisa, viscosity inoderera nekuwedzera kwekushisa, mhinduro inogadzikana pa pH 2-10, pH yakaderera kupfuura 2, kune kunaya kwakasimba, uye viscosity inoderera kana pH yakakwirira kudarika 10. Iyo tembiricha ye discoloration i227 ℃, iyo carbonization tembiricha i252 ℃, uye tension yepasi ye 2% aqueous solution is . 71mn/n.
makemikari zvinhu
Iyo inogadzirwa kubva kune cellulose derivatives yecarboxymethyl substituents, kurapa cellulose ne sodium hydroxide kugadzira alkali cellulose, uyezve kuita ne monochloroacetic acid. Iyo glucose unit inoumba cellulose ine 3 hydroxyl mapoka anogona kutsiviwa, saka zvigadzirwa zvine madhigirii akasiyana ekutsiva zvinogona kuwanikwa. Paavhareji, 1 mmol yecarboxymethyl yakaunzwa pa1 g yehuremu hwakaoma, iyo isinganyungudika mumvura uye inonatsa asidhi, asi inogona kuzvimba uye kushandiswa ion exchange chromatography. Carboxymethyl pKa inenge 4 mumvura yakachena uye inenge 3.5 mu 0.5mol/L NaCl. Iyo isina kusimba acidic cation exchanger uye inowanzo shandiswa kupatsanurwa kwezvakarerekera uye zvakakosha mapuroteni papH> 4. Zvinopfuura makumi mana muzana emapoka e-hydroxyl anotsiviwa nemapoka e-carboxymethyl, anogona kunyungudutswa mumvura kuti aite yakagadzikana yepamusoro-viscosity colloidal solution.
Chinangwa chikuru
Carboxymethyl cellulose (CMC) isiri-chepfu uye isina kunhuhwirira chena flocculent poda ine kuita kwakagadzikana uye inonyungudika nyore mumvura. Mushonga wayo une aqueous imvura isina kwayakarerekera kana alkaline yakajeka viscous fluid, inonyungudika mune mamwe maglue anonyungudika mumvura uye maresin, uye isinganyungudika. mune organic solvents senge ethanol. CMC inogona kushandiswa seanonamira, thickener, kumisa mumiriri, emulsifier, dispersant, stabilizer, sizing mumiriri, nezvimwe.
Sodium carboxymethyl cellulose (CMC) ndicho chigadzirwa chine yakakura kubuda, inonyanya kushandiswa uye inonyanya kushandiswa pakati pe cellulose ethers, inowanzozivikanwa se "industrial monosodium glutamate".
1. Inoshandiswa kuchera mafuta uye gasi rechisikigo, kuchera matsime uye mamwe mapurojekiti
① Madhaka ane CMC anogona kuita kuti madziro etsime aite keke yakatetepa uye yakasimba sefa ine yakaderera permeability, iyo inoderedza kurasikirwa kwemvura.
② Mushure mekuwedzera CMC mumatope, chigadziro chekuchera chinogona kuwana simba rekutanga rekuveura, kuitira kuti dhaka risunungure nyore gasi rakaputirwa mairi, uye panguva imwe chete, tsvina inokurumidza kuraswa mugomba rematope.
③Kuchera madhaka, semamwe kumiswa kuparadzirwa, kune imwe nguva yekuvapo, uye kuwedzera kweCMC kunogona kuita kuti igadzikane uye kurebesa nguva yekuvapo.
④ Madhaka ane CMC haawanzo kukanganiswa ne mold, saka hazvifanirwe kuchengetedza yakakwira pH kukosha uye kushandisa zvinodzivirira.
⑤ Ive neCMC seyekuchera madhaka wekugeza mvura yekurapa, iyo inogona kuramba kusvibiswa kweakasiyana soluble munyu.
⑥ Madhaka ane CMC ane kugadzikana kwakanaka uye anogona kuderedza kurasikirwa kwemvura kunyangwe tembiricha iri pamusoro pe150 ℃.
CMC ine viscosity yakakwirira uye yakakwirira dhigirii yekutsiva inokodzera dhaka ine yakaderera density, uye CMC ine yakaderera viscosity uye yakakwirira dhigirii yekutsiva inokodzera madhaka ane yakakwirira density. Kusarudzwa kweCMC kunofanirwa kutariswa zvinoenderana nemamiriro akasiyana senge mhando yedhaka, dunhu uye kudzika kwetsime.
2. Inoshandiswa mumachira, kudhinda uye kudhaya indasitiri. Indasitiri yemachira inoshandisa CMC seye saizi yekuyera saizi yeshinda yekotoni, sirika shinda, kemikari fiber, yakasanganiswa uye zvimwe zvinhu zvakasimba;
3. Inoshandiswa muindasitiri yemapepa CMC inogona kushandiswa sepepa pamusoro inotsvedzerera mumiririri uye saizi mumiriri muindasitiri yemapepa. Kuwedzera 0.1% kusvika 0.3% CMC kune pulp kunogona kuwedzera kusimba kwebepa ne40% kusvika 50%, kuwedzera kuputika kwekumanikidza ne50%, uye kuwedzera kunyanduka ne4 kusvika kashanu.
4. CMC inogona kushandiswa setsvina adsorbent kana yakawedzerwa kune synthetic detergents; makemikari ezuva nezuva akadai seindasitiri yekuchenesa mazino CMC glycerin aqueous solution inoshandiswa sechigadziko chemazino; indasitiri yemishonga inoshandiswa seyakakora uye emulsifier; CMC aqueous solution yakakora uye inoshandiswa pakuyangarara mineral processing, nezvimwe.
5. Muindasitiri yeceramic, inogona kushandiswa seanonamatira, plasticizer, suspending agent for glaze, color fixing agent, nezvimwewo.
6. Inoshandiswa mukuvaka kuvandudza kuchengetedza kwemvura uye simba
7. Inoshandiswa mumhizha yezvokudya. Indasitiri yezvokudya inoshandisa CMC ine dhigirii rekutsinhanisa yakakwirira semukobvu weaizikirimu, zvokudya zvomumagaba, zviyo zvinokurumidza kubikwa, uye furo stabilizer yedoro, etc. For thickeners, binders kana excipients.
8. Indasitiri yemishonga inosarudza CMC ine viscosity yakakodzera sepiritsi binder, disintegrant, uye kumisa mumiririri nokuda kumiswa.
Nguva yekutumira: Nov-03-2022