Carboxymethyl cellulose (CMC) inowanikwa mushure me carboxymethylation ye cellulose. Mushonga waro wemvura une mabasa ekukora, kugadzira firimu, kunamatira, kuchengetedza mvura, kudzivirira kwecolloid, emulsification uye kuturika, etc. Inoshandiswa zvakanyanya mu petroleum, chikafu, mishonga , textile uye mapepa maindasitiri, ndeimwe yeanonyanya kukosha cellulose ethers. .Natural cellulose ndiyo inonyanya kuparadzirwa uye yakawanda kwazvo polysaccharide muzvisikwa, uye zvinyorwa zvayo zvakapfuma zvikuru. Iyo yazvino yekugadziridza tekinoroji ye cellulose inonyanya kutarisa etherification uye esterification. Carboxymethylation reaction imhando ye etherification tekinoroji.
zvinhu zvemuviri
Sodium carboxymethylcellulose (CMC) is anionic cellulose ether. Chitarisiko chayo chichena kana zvishoma yero flocculent faibha upfu kana chena hupfu, isinganhuhwi, isingaravike, uye isina chepfu; inonyungudika nyore mumvura inotonhora kana inopisa uye inoumba imwe viscosity. transparent solution. Mushonga wacho hauna kwawakarerekera kana zvishoma alkaline, usingagadzirike mu ethanol, ether, isopropanol, acetone uye mamwe organic solvents, asi soluble mu 60% ethanol kana acetone solution. Iine hygroscopic uye yakagadzikana kune chiedza nekupisa. Iyo viscosity inoderera nekuwedzera kwekushisa. Mhinduro yacho yakagadzikana pa pH 2-10. Kana pH yakadzikira kupfuura 2, maonda anonaya. Kana iyo pH yakakwira kupfuura gumi, viscosity inoderera. Iyo tembiricha ye discoloration i227 ° C, iyo carbonization tembiricha i252 ° C, uye tension yepasi ye 2% aqueous solution i71mn/n.
makemikari zvinhu
Inowanikwa nekurapa cellulose ne carboxymethyl substituents, kurapa cellulose ne sodium hydroxide kugadzira alkali cellulose, uyezve kuita ne monochloroacetic acid. Iyo glucose unit inoumba cellulose ine matatu hydroxyl mapoka anogona kutsiviwa, saka zvigadzirwa zvine madhigirii akasiyana ekutsiva zvinogona kuwanikwa. Paavhareji, 1mmol yeboka recarboxymethyl pa1g yehuremu hwakaoma hainyungudike 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
Carboxymethylcellulose (CMC) isiri-chepfu, isina kunhuhwirira chena flocculent poda ine kuita kwakagadzikana uye inonyungudika nyore mumvura. Mushonga wayo une aqueous ndeye kwaurere kana alkaline transparent viscous fluid, inonyungudika mune mamwe anonyungudika mumvura glues uye resin, uye isinganyunguke muorganic solvents senge ethanol. CMC inogona kushandiswa sebhainda, thickener, kumisa mumiriri, emulsifier, dispersant, stabilizer, sizing mumiriri, nezvimwe.
Sodium carboxymethyl cellulose (CMC) ndicho chigadzirwa chine yakakura kuburitsa, yakakura kwazvo siyana yekushandisa uye yakanyanya nyore kushandiswa pakati pe cellulose ethers, inowanzozivikanwa se "industrial monosodium glutamate".
1. Inoshandiswa mumafuta uye gasi kuchera, kuchera zvakanaka uye mamwe mapurojekiti
① CMC-ine madhaka inogona kuita kuti madziro etsime aite keke yakatetepa uye yakasimba sefa ine yakaderera permeability, ichideredza 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, marara anogona kukurumidza kuraswa mugomba rematope.
③ Kuchera madhaka, semamwe kumiswa uye kupararira, kune humwe hupenyu hwesherufu. Kuwedzera CMC kunogona kuita kuti igadzikane uye kurebesa hupenyu hwesherufu.
④ CMC-ine madhaka haawanzo kukanganiswa nekuumbwa, saka hazvifanirwe kuchengetedza yakakwira pH kukosha uye kushandisa zvinodzivirira.
⑤ Iine CMC semubatsiri wekurapa wekuchera madhaka ekutsvaira mvura, anogona kuramba kusvibiswa kweakasiyana soluble salt.
⑥ CMC-ine madhaka ane kugadzikana kwakanaka uye anogona kuderedza kurasikirwa kwemvura kunyangwe tembiricha iri pamusoro pe150°C.
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. Sarudzo yeCMC inofanirwa kutemerwa zvinoenderana nemamiriro akasiyana senge mhando yedhaka, dunhu, uye kudzika kwetsime.
2. Inoshandiswa mumaindasitiri emucheka, kudhinda nekudhaya. Muindasitiri yemachira, CMC inoshandiswa seyakayera saizi yekuyera shinda yekotoni, sirika shinda, kemikari fiber, yakasanganiswa uye zvimwe zvinhu zvakasimba;
3. Inoshandiswa muindasitiri yemapepa CMC inogona kushandiswa sebepa rinotsvedzerera mumiririri uye saizi mumiriri muindasitiri yemapepa. Kuwedzera 0.1% kusvika 0.3% yeCMC mupulp kunogona kuwedzera kusimba kwebepa ne40% kusvika 50%, kuwedzera kurwisa kwekutsemuka ne50%, uye kuwedzera pfuma yekukanya nekashanu kusvika kashanu.
4. CMC inogona kushandiswa setsvina adsorbent kana yakawedzerwa kune synthetic detergents; makemikari emazuva ese akadai seindasitiri yekuchenesa mazino CMC glycerol aqueous solution inoshandiswa segum base; indasitiri yemishonga inoshandiswa seyakakora uye emulsifier; CMC aqueous mhinduro inoshandiswa seyangarara mushure mekukora Mining uye zvichingodaro.
5. Inogona kushandiswa seadhesive, plasticizer, suspending agent of glaze, color fixing agent, etc. mune ceramic industry.
6. Inoshandiswa mukuvaka kuvandudza kuchengetedza kwemvura uye simba
7. Inoshandiswa mumhizha yezvokudya. Indasitiri yezvekudya inoshandisa CMC ine yakakwira dhigirii yekutsiva seyakakora yeaizi cream, chikafu chemumagaba, ma noodles ekare, uye foam stabilizer yedoro. Kune makobvu, mabhainda kana conformal agents.
8. Indasitiri yemishonga inosarudza CMC ine viscosity yakakodzera sebhainda,
disintegrating agent yemapiritsi, uye kumisa mumiriri wekumiswa, nezvimwe.
Nguva yekutumira: Nov-24-2022