Carboxymethyl cellulose (sodium carboxyme thyl cellulose, CMC) inotorwa necarboxymethylated ye cellulose, inozivikanwawo secellulose chingamu, uye ndiyo inonyanya kukosha ionic cellulose chingamu.
CMC inowanzoita anionic polymer compound inogadzirwa nekuita serusisiro yepanyama ine caustic alkali uye monochloroacetic acid. Huremu hwemamorekuru ekomboni yacho hunosiyana kubva pazviuru zvakati kuti kusvika pamirioni imwe.
CMC ndeyekugadziriswa kwechisikigo cellulose, uye iyo 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 naGerman E. Jansen muna 1918, uye yakapihwa patent muna 1921 uye yakazivikanwa pasirese, uyezve yakatengeswa muEurope.
CMC inoshandiswa zvakanyanya mu petroleum, geological , zuva nezuva makemikari, chikafu, mishonga uye mamwe maindasitiri, anozivikanwa se "industrial monosodium glutamate".
※Zvimiro zveCMC
CMC iupfu chena kana chiedza yeyero, granular kana fibrous solid. Iyo macromolecular chemical substance inogona kutora mvura nekuzvimba. Kana ichizvimba mumvura, inogona kuumba 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 kune chiedza uye tembiricha yekamuri, uye inogona kuchengetwa kwenguva yakareba munzvimbo yakaoma. CMC imhando ye cellulose ether, inowanzo gadzirwa nemapfupi edonje linters (cellulose yemukati inosvika 98%) kana yehuni pulp, inorapwa nesodium hydroxide uye yobva yaita nesodium monochloroacetate, huremu hwekomboni i6400 (± 1000). Kazhinji kune nzira mbiri dzekugadzirira: nzira yemvura-marasha uye nzira yekunyungudutsa. Kune zvakare mamwe mashizha emiti anoshandiswa kugadzirira CMC.
※Zvimiro uye maapplication
CMC haingori yakanaka emulsification stabilizer uye thickener mukushandisa kwechikafu, asi zvakare ine yakanakisa kutonhora nekunyunguduka kugadzikana, uye inogona kuvandudza kunaka kwechigadzirwa uye kurebesa nguva yekuchengetedza.
Muna 1974, iyo Food and Agriculture Organisation yeUnited Nations (FAO) neWorld Health Organisation (WHO) yakabvumidza kushandiswa kweCMC yakachena muchikafu mushure mekuomarara kwebiological uye toxicological research uye bvunzo. Iyo yakachengeteka kudya (ADI) yepasi rose mwero ndeye 25mg/ kg uremu hwemuviri/zuva.
※Thickening uye emulsion kugadzikana
Kudya CMC kunogona kumisa uye kudzikamisa zvinwiwa zvine mafuta uye mapuroteni. Izvi zvinodaro nekuti CMC inova yakajeka yakagadzikana colloid mushure mekunyungudika mumvura, uye mapuroteni zvidimbu zvinova zvimedu zvine mutero wakafanana pasi pekuchengetedzwa kwecolloidal membrane, iyo inogona kuita mapuroteni zvidimbu mune yakagadzikana mamiriro. Iyo ine imwe emulsifying mhedzisiro, saka inogona kuderedza kusawirirana kwepamusoro pakati pemafuta nemvura panguva imwe chete, 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 kuumba chimiro chakaumbwa neprotein, inogona kuvandudza kugadzikana kwechigadzirwa.
※Wedzera kuwanda
Kushandiswa kweCMC muaizikirimu kunogona kuwedzera dhigirii rekuwedzera eice cream, 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 hweProportioned kuwedzera.
Izvi zvinodaro nekuti CMC ine mvura yakanaka yekuchengetedza uye dispersibility, uye organically inosanganisa mapuroteni zvidimbu, mafuta globules, uye mamorekuru emvura mucolloid kuumba yunifomu uye yakagadzikana sisitimu.
※Hydrophilicity uye Rehydration
Ichi chinoshanda cheCMC chinowanzo shandiswa mukugadzira chingwa, icho chinogona kugadzira yunifomu yehuchi, kuwedzera huwandu, kuderedza madhiri, uye zvakare kuve nemhedzisiro yekuchengetedza kupisa uye kutsva; ma noodles akawedzerwa neCMC ane yakanaka kubata mvura, kuramba kubika, uye kuravira kwakanaka.
Izvi zvinotemerwa neiyo molecular chimiro cheCMC, inova cellulose derivative uye ine nhamba huru yemapoka e-hydrophilic muketani yemamorekuru: -OH boka, -COONa boka, saka CMC ine zvirinani hydrophilicity pane cellulose uye mvura inobata simba.
※ Gelation
Thixotropic CMC inoreva kuti maketani macromolecular ane humwe huwandu hwekubatana uye anowanzoita maitiro matatu-dimensional. Mushure mokunge chimiro chetatu-dimensional chaumbwa, viscosity yemhinduro inowedzera, uye mushure mokunge matatu-dimensional chimiro chaputsika, viscosity inoderera. Iyo thixotropy phenomenon ndeyekuti iyo inooneka viscosity shanduko inoenderana nenguva.
Thixotropic CMC inobata basa rinokosha mu gelling system uye inogona kushandiswa kugadzira jelly, jam nezvimwe zvokudya.
Inogona kushandiswa sekujekesa, furo stabilizer, kuwedzera muromo
CMC inogona kushandiswa mukugadzira waini kuita kuti kuravira kuve kunyoro uye kupfuma nekunakidza kwenguva refu; inogona kushandiswa sefoam stabilizer mukugadzirwa kwedoro kuita kuti furo ripfume uye rigare kwenguva refu uye kuvandudza kunaka.
CMC imhando ye polyelectrolyte, iyo inogona kuve nechekuita mukuita kwakasiyana-siyana muwaini kuchengetedza chiyero chemuviri wewaini. Panguva imwecheteyo, inobatanidzawo nemakristasi akaumbwa, kushandura chimiro chemakristasi, kushandura mamiriro ekuvapo kwemakristasi muwaini, uye kukonzera kunaya kwemvura. Kuunganidzwa kwezvinhu.
Nguva yekutumira: Zvita-03-2022