CMC inoshandiswa mukudya
Sodium carboxymethyl cellulose (carboxymethyl cellulose, sodium CMC) inotorwa necarboxymethylated ye cellulose, inozivikanwawo secellulose chingamu, uye ndiyo inonyanya kukosha ionic cellulose chingamu.
CMC inowanzoita anionic polymer compound inowanikwa nekuita zvechisikigo cellulose ine caustic alkali uye monochloroacetic acid. Huremu hwemamorekuru hwekomboni hunobva pazviuru zvakati kuti kusvika pamiriyoni imwe. chikamu chechidimbu chemorekuru
CMC ndeyekugadziriswa kwechisikigo cellulose. Parizvino, Food and Agriculture Organisation yeUnited Nations (FAO) neWorld Health Organisation (WHO) vakazvidaidza zviri pamutemo kuti "modified cellulose". Iyo synthesis nzira ye sodium carboxymethyl cellulose yakagadzirwa neGerman E.Jansen muna 1918, uye yakapihwa patent muna 1921 uye yakaziviswa kupasirese, kubva ipapo yakatengeswa muEurope.
CMC yaingoshandiswa kune zvigadzirwa zvisina kuchena, se colloid uye binder. Kubva 1936 kusvika 1941, iyo indasitiri yekushandisa tsvakiridzo ye sodium carboxymethyl cellulose yaive inoshanda, uye akati wandei anojekesa patent akaburitswa. Munguva yeHondo Yenyika II, Germany yakashandisa CMC mune zvekugadzira detergents seanorwisa-redeposition agent, Uye sechinotsiva mamwe magamu echisikigo (akadai segelatin, gum arabic), indasitiri yeCMC yakagadziridzwa zvakanyanya.
CMC inoshandiswa zvakanyanya mu petroleum, geological , zuva nezuva kemikari, chikafu, mishonga uye mamwe maindasitiri, anozivikanwa se "industrial monosodium glutamate".
01CHIKAMU
Zvimiro zveCMC
CMC iupfu chena kana yero zvishoma, granular kana fibrous solid. Iyo macromolecular chemical substance inogona kutora mvura nekuzvimba. Kana yakazvimba mumvura, inogona kugadzira yakajeka viscous glue. Iyo pH yeaqueous suspension ndeye 6.5-8.5. Mushonga wacho haunyungudika muzvinonyungudutsa zvinonyungudutsa senge ethanol, ether, acetone uye chloroform.
Solid CMC yakagadzikana kuchiedza uye tembiricha yekamuri, uye inogona kuchengetwa kwenguva yakareba munzvimbo yakaoma. CMC imhando ye cellulose ether. Inowanzo gadzirwa kubva kupfupi wekotoni linter (selulosi inokwana kusvika 98%) kana huni pulp, iyo inobatwa ne sodium hydroxide uye yobva yaita ne sodium monochloroacetate. Iyo molecular huremu hwekomboni ndeye 6400 (± 1000). Kazhinji pane nzira mbiri dzekugadzirira: nzira yemarasha-mvura uye nzira yekunyungudutsa. Kune zvakare mamwe mashizha emiti anoshandiswa kugadzira CMC.
02CHIKAMU
Features uye Applications
CMC haingori yakanaka emulsion stabilizer uye thickener mukushandisa kwechikafu, asiwo ine yakanakisa kutonhora nekunyunguduka kugadzikana, uye inogona kuvandudza kunaka kwechigadzirwa uye kurebesa nguva yekuchengetedza.
Muna 1974, Food and Agriculture Organisation yeUnited Nations (FAO) neWorld Health Organisation (WHO) yakabvumidza kushandiswa kweCMC yakachena yechikafu mushure mekuomarara kwebiological uye toxicological zvidzidzo uye bvunzo. Muyero wepasi rose wakachengeteka kudya (ADI) ndeye 25mg/kg uremu hwemuviri/zuva.
2.1 Kukora uye emulsification kugadzikana
Kudya CMC kunogona kuita basa mu emulsification uye kugadzikana kwezvinwiwa zvine mafuta uye mapuroteni. Izvi zvinodaro nekuti CMC inova yakajeka yakagadzikana colloid mushure mekunyungudutswa mumvura, uye mapuroteni zvidimbu zvinova zvimedu zvine mutero wakafanana pasi pekuchengetedzwa kwefirimu recolloid, iro rinogona kuita kuti mapuroteni ave akagadzikana. Iyo inewo imwe emulsification mhedzisiro, saka panguva imwe chete, inogona kuderedza kusawirirana kwepamusoro pakati pemafuta nemvura, kuitira kuti mafuta akwanise kuve akazara emulsified.
CMC inogona kuvandudza kugadzikana kwechigadzirwa nekuti kana iyo pH kukosha kwechigadzirwa ichitsauka kubva kune isoelectric point yeprotein, sodium carboxymethyl cellulose inogona kugadzira chimiro chakaomarara neprotein, inogona kuvandudza kugadzikana kwechigadzirwa.
2.2 Wedzera kuwanda
Kushandiswa kweCMC muaizikirimu kunogona kuwedzera kuwedzera kweaizikirimu, kunatsiridza kukurumidza kunyunguduka, kupa chimiro chakanaka uye kuravira, uye kutonga saizi uye kukura kweaizi makristasi panguva yekufambisa uye kuchengetedza. Mari inoshandiswa ndeye 0.5% yehuwandu. Chiyero chinowedzerwa.
Izvi zvinodaro nekuti CMC ine mvura yakanaka kuchengetedza uye dispersibility, uye organically inosanganisa mapuroteni zvidimbu, mafuta globules uye mvura mamorekuru ari colloid kuumba yunifomu uye yakagadzikana hurongwa.
2.3 Hydrophilicity uye rehydration
Ichi chinoshanda cheCMC chinowanzo shandiswa mukugadzira chingwa, icho chinogona kugadzira yunifomu yehuchi, kuwedzera huwandu, kuderedza slag, uye zvakare kuve nemhedzisiro yekudziya uye kutsva; iwo ma noodles akawedzerwa neCMC ane yakanaka kuchengetedza mvura, kuramba kubika uye kuravira kwakanaka.
Izvi zvinotemerwa neiyo molecular chimiro cheCMC, inova cellulose derivative ine nhamba huru yemapoka ehydrophilic muketani yemamolecular: -OH boka, -COONa boka, saka CMC ine nani hydrophilicity pane cellulose uye mvura inobata simba.
2.4 Gelation
Thixotropic CMC inoreva kuti maketani macromolecular ane imwe nhamba yekubatana uye anowanzoita maitiro matatu-dimensional. Mushure mokunge chimiro chetatu-dimensional chaumbwa, viscosity yemhinduro inowedzera, uye mushure mokunge matatu-dimensional chimiro chaputsika, viscosity inoderera. Iyo thixotropic phenomenon ndeyekuti iyo inooneka viscosity shanduko inoenderana nenguva.
Thixotropic CMC inobata basa rinokosha mu gelling system uye inogona kushandiswa kugadzira jelly, jam nezvimwe zvokudya.
2.5 Inogona kushandiswa sechinhu chinojekesa, foam stabilizer, kuwedzera kuravira
CMC inogona kushandiswa mukugadzira waini kuita kuti kuravira kuve kwakanyorova uye kwakapfuma, uye iyo aftertaste yakareba; mukugadzirwa kwedoro, rinogona kushandiswa sefoam stabilizer yedoro, zvichiita kuti furo ripfume uye rigare uye rinonatsiridza kunaka.
CMC ndeye polyelectrolyte, iyo inogona kutora chikamu mune akasiyana maitiro muwaini kuchengetedza chiyero chemuviri wewaini. Panguva imwecheteyo, inobatanidzawo nemakristasi akaumbwa, kushandura chimiro chemakristasi, kushandura mamiriro emakristasi muwaini, uye kukonzera kunaya kwemvura. Kuunganidzwa kwezvinhu.
Nguva yekutumira: Nov-07-2022