Focus on Cellulose ethers

Maitiro ekushandisa uye maitiro ezvinodiwa zveCMC muchikafu

Sodium carboxymethyl cellulose, inonzi carboxymethyl cellulose (CMC) imhando yepamusoro-polymer fiber ether inogadzirwa nekemikari shanduko yeyakasikwa cellulose. Chimiro chayo chinonyanya kuita D-glucose unit kuburikidza ne β (1 → 4) glycosidic bond yakabatana zvikamu. Iko kushandiswa kweCMC kune akawanda mabhenefiti pamusoro pezvimwe zvinokora zvekudya.

01 CMC inoshandiswa zvakanyanya mukudya

(1) CMC ine kugadzikana kwakanaka

Muzvokudya zvinotonhora zvakadai sepopsicles uye ice cream, inogona kudzora kuumbwa kwemakristasi echando, kuwedzera kuwedzera kwekuwedzera uye kuchengetedza chimiro chakafanana, kudzivisa kunyunguduka, kuva nekuravira kwakanaka uye kwakatsetseka, uye kuchena ruvara.

Muzvigadzirwa zvemukaka, ingave mukaka wakakangwa, mukaka wemichero kana yoghurt, unogona kuita neprotein mukati meiyo isoelectric point ye pH kukosha (PH4.6) kugadzira yakaoma ine chimiro chakaoma, icho chinobatsira kugadzikana kwe emulsion uye Kuvandudza mapuroteni kuramba.

(2) CMC inogona kusanganiswa nemamwe ma stabilizer uye emulsifiers

Muzvigadzirwa zvekudya uye zvinwiwa, vagadziri vese vanoshandisa zvakasiyana-siyana zvekudzikamisa, zvakadai se: xanthan gum, guar gum, carrageenan, dextrin, etc. Emulsifiers yakadai se: glycerol monostearate, sucrose fatty acid esters, nezvimwewo, inosanganiswa kuti iwedzere mumwe nomumwe. mabhenefiti uye tamba synergistic basa kudzikisa mutengo wekugadzira.

(3) CMC ine pseudoplasticity

Iyo viscosity yeCMC inodzoserwa pane tembiricha dzakasiyana. Sezvo kutonhora kuchikwira, viscosity yemhinduro inoderera, uye zvakasiyana; kana simba rekuveura riripo, viscosity yeCMC ichaderera, uye nekuwedzera kwesimba rekuveura, viscosity ichaderera. Izvi zvivakwa zvinoita kuti CMC ideredze mutoro wemidziyo uye kuvandudza homogenization kushanda zvakanaka kana ichikurudzira, homogenizing, uye pombi yekufambisa, iyo isingaenzaniswi nemamwe anodzikamisa.

02 Process zvinodiwa

Sechigadziriso chinoshanda, CMC inokanganisa maitiro ayo kana ikashandiswa zvisina kunaka, uye kunyange kuita kuti chigadzirwa chiraswe. Naizvozvo, kune CMC, zvakakosha kwazvo kuparadzira zvakazara uye zvakaenzana mhinduro yekuvandudza kushanda kwayo, kuderedza dosi, kuvandudza chigadzirwa chemhando uye kuwedzera goho. Kunyanya, kutarisisa kunofanirwa kubhadharwa kune yega yega nhanho yekuita:

(1) Zvisungo

1. High-speed shear dispersion method ine mechanical force

Zvese zvishandiso zvine kugona kusanganisa zvinogona kushandiswa kubatsira CMC kupararira mumvura. Kuburikidza nekuveura kukuru-kumhanya, CMC inogona kunyikwa zvakaenzana mumvura kuti ikurumidze kuparara kweCMC.

Vamwe vagadziri parizvino vanoshandisa masanganisi emvura-hupfu kana matangi ekusanganisa anomhanya.

2. Shuga yakaoma kusanganisa nzira yekuparadzira

Sanganisa zvakanaka neCMC uye shuga yegranulated pareshiyo ye1: 5, uye umwase mukati zvishoma nezvishoma pasi pekugara uchibvongodza kuti uparadze zvizere CMC.

3. Dissolve mumvura ine shuga yakazara

Zvakadai se caramel, nezvimwe, zvinogona kukurumidza kuparara kweCMC.

(2) Acid kuwedzera

Kune zvimwe zvinwiwa zvine acidic, senge yogati, zvigadzirwa zvinodzivirira acid zvinofanirwa kusarudzwa. Kana akashandiswa zvakajairika, mhando yechigadzirwa inogona kuvandudzwa uye kunaya kwechigadzirwa uye stratification inogona kudzivirirwa.

1. Paunenge uchiwedzera asidhi, tembiricha yekuwedzera asidhi inofanira kunyatsodzorwa, kazhinji ≤20°C.

2. Kugadziriswa kweasidhi kunofanira kudzorwa pa8-20%, iyo yakaderera iri nani.

3. Asidhi yekuwedzera inotora nzira yekupfapfaidza, uye inowedzerwa pamwe netangential gwara reiyo reshiyo yemidziyo, kazhinji maminetsi 1-3.

4. Slurry speed n = 1400-2400r / m

(3) Zvakafanana

1. Chinangwa che emulsification

Homogeneous, ine mafuta-ine feed fluid, CMC inofanirwa kusanganiswa ne emulsifier, senge monoglyceride, iyo homogenization pressure ndeye 18-25mpa, uye tembiricha i60-70 ° C.

2. Chinangwa cheDecentralized

Homogenization, kana zvinhu zvakasiyana-siyana mukutanga kwekutanga hazvina kufanana zvakakwana, kuchine zvimwe zviduku zviduku, zvinofanira kuva homogenized, homogenization pressure ndeye 10mpa, uye kutonhora kuri 60-70 ° C.

(4) Kuvharisa

CMC pakupisa kwakanyanya, kunyanya kana tembiricha yakakwira kupfuura 50 ° C kwenguva yakareba, viscosity yeCMC ine hutsika husina kunaka inoderera zvisingachinjiki. Iyo viscosity yeCMC yevagadziri vese inodonha zvakanyanya pa80 ° C kwemaminetsi makumi matatu, saka instant sterilization kana barization inogona kushandiswa. Sterilization nzira kupfupisa nguva CMC panguva tembiricha.

(5) Zvimwe zvokungwarira

1. Mvura yakasarudzwa inofanira kuva yakachena uye inogadziriswa mvura yepombi sezvinobvira. Mvura yakanaka haifanirwe kushandiswa kudzivirira hutachiona hwehutachiona uye hunokanganisa kunaka kwechigadzirwa.

2. Midziyo yekunyungudutsa nekuchengetedza CMC haigone kushandiswa mumidziyo yesimbi, asi midziyo yesimbi isina tsvina, mabheseni emapuranga, kana midziyo yeramic inogona kushandiswa. Kudzivirira kupinza kwe divalent metal ions.

3. Mushure mekushandiswa kwega kwega kweCMC, muromo webhegi rekurongedza unofanirwa kusungirirwa zvakasimba kudzivirira kunyura kwehunyoro uye kuparara kweCMC.

03 Mhinduro kumibvunzo mukushandiswa kweCMC

Ko low-viscosity, medium-viscosity, uye high-viscosity zvinosiyaniswa sei maitiro? Pachava nemusiyano mukuenderana here?

Pindura:

Zvinonzwisiswa kuti kureba kweketani yemamorekuru kwakasiyana, kana huremu hwemamorekuru hwakasiyana, uye hwakakamurwa kuva yakaderera, yepakati uye yakakwirira viscosity. Ehe, iyo macroscopic performance inoenderana neyakasiyana viscosity. Iyo imwechete yekusangana ine akasiyana viscosity, kugadzikana kwechigadzirwa uye acid ratio. Ukama hwakananga hunonyanya kuenderana nemhinduro yechigadzirwa.

Ndeapi maitiro chaiwo ezvigadzirwa zvine dhigirii rekutsiva pamusoro pe1.15? Mune mamwe mazwi, iyo yakakwirira dhigirii yekutsiva, iyo chaiyo mashandiro echigadzirwa akawedzerwa?

Pindura:

Chigadzirwa chacho chine yakakwira dhigirii yekutsiva, yakawedzera fluidity, uye zvakanyanya kuderedzwa pseudoplasticity. Zvigadzirwa zvine viscosity yakafanana zvine yakakwira dhigirii yekutsiva uye inobuda pachena inotsvedza. Zvigadzirwa zvine mwero wakakwirira wekutsiva zvine mhinduro inopenya, nepo zvigadzirwa zvine mwero dhigirii rekutsiva zvine mucheno mhinduro.

Zvakanaka here kusarudza pakati viscosity kugadzira mapuroteni akaviriswa zvinwiwa?

Pindura:

Zvigadzirwa zvepakati uye zvakaderera viscosity, dhigirii rekutsiva rinenge 0.90, uye zvigadzirwa zvine nani acid kuramba.

Ko CMC inogona kuparara nekukurumidza sei? Dzimwe nguva, mushure mokuvira, inonyunguduka zvishoma nezvishoma.

Pindura:

Sanganisa nemamwe macolloid, kana kuparadzira ne1000-1200 rpm agitator.

Iyo dispersibility yeCMC haina kunaka, iyo hydrophilicity yakanaka, uye iri nyore kuunganidza, uye zvigadzirwa zvine high substitution degree zviri pachena! Mvura inodziya inonyungudika nekukurumidza kupfuura mvura inotonhora. Kubika kazhinji hakukurudzirwe. Kubika kwenguva refu kwezvigadzirwa zveCMC kuchaparadza chimiro chemolecular uye chigadzirwa chinorasikirwa neviscosity yayo!


Nguva yekutumira: Zvita-13-2022
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