Kuwanda kwe sodium carboxymethyl cellulose kwakakamurwawo kuita magiredhi akasiyana zvichienderana nekushandiswa kwakasiyana. Kuwanda kwekuwachisa i10~70 (pasi pe100), muganho wepamusoro wekuwanda unobva pa200~1200 wekushongedza zvivakwa nemamwe maindasitiri, uye kuwanda kwemhando yechikafu kwakatokwira. Ose ari pamusoro pe1000, uye kuwanda kwemaindasitiri akasiyana-siyana hakuna kufanana.
Nekuda kwekushandiswa kwayo kwakasiyana-siyana.
Kuwanda kwe sodium carboxymethyl cellulose kunokanganiswa nehukuru hwayo hwemamorekuru, kuwanda, tembiricha uye pH, uye inosanganiswa ne ethyl kana carboxypropyl cellulose, gelatin, xanthan gum, carrageenan, locust bean gum, guar gum, agar, sodium alginate, pectin, gum arabic uye starch uye zvinobuda mairi zvine hukama hwakanaka (kureva synergistic effect).
Kana pH iri 7, viscosity ye sodium carboxymethyl cellulose solution ndiyo yakanyanya kukwira, uye kana pH iri 4 ~ 11, inenge yakagadzikana. Carboxymethylcellulose muchimiro chealkali metal neammonium salts inonyungudika mumvura. Divalent metal ions Ca2+, Mg2+, Fe2+ inogona kukanganisa viscosity yayo. Simbi dzakakora dzakadai sesirivha, barium, chromium kana Fe3+ dzinogona kuita kuti ibude mumusanganiswa. Kana kuwanda kwemaion kuchidzorwa, sekuwedzerwa kwe chelating agent citric acid, mhinduro ine viscous inogona kuumbwa, zvichikonzera gum yakapfava kana yakaoma.
Sodium carboxymethyl cellulose imhando ye cellulose yechisikigo, iyo inowanzo gadzirwa nedonje kana pulp yehuni sezvinhu zvakagadziriswa uye inopinzwa mu etherification reaction ne monochloroacetic acid pasi pemamiriro e alkaline.
Zvichienderana netsanangudzo yezvinhu zvakagadziriswa uye kutsiviwa kwehydroxyl hydrogen mu cellulose D-glucose unit neboka re carboxymethyl, ma polymer compounds anonyungudika mumvura ane madhigirii akasiyana ekutsiva uye kugoverwa kwakasiyana kwehuremu hwemamorekuru kunowanikwa.
Nekuti sodium carboxymethyl cellulose ine hunhu hwakawanda hwakasiyana uye hwakanaka, inoshandiswa zvakanyanya muindasitiri yemakemikari yezuva nezuva, chikafu nemishonga uye mamwe maindasitiri.
Chimwe chezvinhu zvinonyanya kukosha zvinoratidza sodium carboxymethyl cellulose ndiko kusimba kwe sodium carboxymethyl cellulose. Kukosha kwe kusimba kwakabatana nezvinhu zvakasiyana-siyana zvakaita sekusimba, tembiricha uye mwero wekuchekwa kwechinhu. Zvisinei, zvinhu zvakaita sekusimba, tembiricha uye mwero wekuchekwa kwechinhu ndizvo zvinhu zvekunze zvinokanganisa kusimba kwe sodium carboxymethyl cellulose.
Kurema kwayo kwemamorekuru uye kugoverwa kwemamorekuru ndizvo zvinhu zvemukati zvinokanganisa kusimba kwe sodium carboxymethyl cellulose solution. Kuti igadzirise kugadzirwa uye kugadzirwa kwekugadzirwa kwe sodium carboxymethyl cellulose, kutsvakurudza nezvehuremu hwayo hwemamorekuru uye kugoverwa kwehuremu hwemamorekuru kune kukosha kwakakosha, nepo kusimba kwe viscosity kunogona kungoita basa rekutarisa chete.
Mitemo yaNewton mu rheology, ndapota verenga zviri mu "rheology" mu physical chemistry, zvakaoma kutsanangura mumutsara mumwe kana miviri. Kana uchifanira kutaura: kune diluted solution ye cmc iri pedyo neNewtonian fluid, shear stress inoenderana ne cutting edge rate, uye proportional coefficient iri pakati padzo inonzi viscosity coefficient kana kinematic viscosity.
Kusviba kunobva mumasimba ari pakati pemaketani emamorekuru e cellulose, kusanganisira masimba ekupararira uye mabhondi ehydrogen. Kunyanya, polymerization ye cellulose derivatives haisi chimiro chakarongeka asi chimiro chine matavi akawanda. Mumhinduro, mamorekuru akawanda ane matavi akawanda akabatana kuti agadzire chimiro che network yenzvimbo. Kana chimiro chakasimba, masimba ari pakati pemaketani emamorekuru mumhinduro inobuda anowedzera.
Kuti pave nekuyerera kwemvura mu diluted solution ye cellulose derivatives, simba riri pakati pemaketani emamorekuru rinofanira kukundwa, saka mhinduro ine polymerization yakawanda inoda simba guru kuti ibudise kuyerera. Pakuyerwa kwe viscosity, simba riri paCMC solution igravity. Pasi pemamiriro e gravity inogara iripo, chimiro che chain cheCMC solution ine polymerization yakawanda chine simba guru, uye kuyerera kwayo kunononoka. Kuyerera kunononoka kunoratidza viscosity.
Kuwanda kwe sodium carboxymethyl cellulose kunonyanya kuenderana nehuremu hwemamorekuru, uye hakuna chekuita nehukuru hwekutsiva. Huremu hwechinzvimbo hwacho hwakakura, huremu hwemamorekuru hwacho hwakakura, nekuti huremu hwemamorekuru hweboka re carboxymethyl rakatsiviwa hwakakura kupfuura boka re hydroxyl rekare.
Munyu we sodium we cellulose carboxymethyl ether, anionic cellulose ether, ihupfu hwe fibrous kana granule chena kana mukaka, ine density ye 0.5-0.7 g/cm3, inenge isina hwema, isina kunaka, uye hygroscopic. Zviri nyore kupararira mumvura kuti igadzire colloidal solution yakajeka, uye hainyungudike mu organic solvents dzakadai se ethanol. pH ye 1% aqueous solution i6.5 kusvika 8.5. Kana pH inopfuura 10 kana <5, viscosity ye sodium carboxymethylcellulose inodzikira zvakanyanya, uye mashandiro acho anonyanya kunaka kana pH = 7.
Inogadzikana pakupisa. Kupisa kunokwira nekukurumidza pasi pe20℃, uye kunochinja zvishoma nezvishoma pa45℃. Kupisa kwenguva refu pamusoro pe80℃ kunogona kukanganisa colloid uye kuderedza kusimba uye kushanda zvakanyanya. Inonyungudika nyore nyore mumvura, uye mhinduro yacho yakajeka; inogadzikana zvikuru mumvura ine alkaline, uye iri nyore kunyungudika kana paine acid. Kana pH iri 2-3, inodonha.
Nguva yekutumira: Mbudzi-07-2022