Iyini i-Sodium carboxymethylcellulose?

I-Sodium carboxymethylcellulose(CMC) iyi-anionic cellulose ether. Ukubukeka kwayo kuyimpuphu yefayibha emhlophe noma ephuzi kancane e-flocculent noma i-white powder, ayinaphunga, ayinambitheki, futhi ayinabo ubuthi; incibilika kalula emanzini abandayo noma ashisayo futhi yakha isixazululo esithile esicacile se-viscosity. Isixazululo asithathi hlangothi noma sine-alkaline kancane, asincibiliki ku-ethanol, i-ether, i-isopropanol, i-acetone nezinye izinyibilikisi eziphilayo, kodwa sincibilika ku-60% ethanol noma isixazululo se-acetone. Siyi-hygroscopic futhi sizinzile ekukhanyeni nasekushiseni. I-viscosity iyancipha ngokwanda kwezinga lokushisa. Isixazululo sizinzile ku-pH 2-10. Lapho i-pH ingaphansi kuka-2, izinto eziqinile ziyavuvukala. Lapho i-pH iphakeme kuno-10, i-viscosity iyancipha. Izinga lokushisa lokushintsha umbala lingu-227°C, izinga lokushisa le-carbonization lingu-252°C, kanti ukucindezelwa kobuso besisombululo samanzi esingu-2% kungu-71mn/n.

izakhiwo zamakhemikhali

Itholakala ngokwelapha i-cellulose nge-carboxymethyl substituents, ukwelapha i-cellulose nge-sodium hydroxide ukuze kwakhiwe i-alkali cellulose, bese kusabela nge-monochloroacetic acid. Iyunithi ye-glucose eyakha i-cellulose inamaqembu amathathu e-hydroxyl angashintshwa, ngakho-ke imikhiqizo enamazinga ahlukene okufaka esikhundleni ingatholakala. Ngokwesilinganiso, i-1mmol yeqembu le-carboxymethyl nge-1g yesisindo esomile ayincibiliki emanzini futhi incibilikise i-asidi, kodwa ingavuvukala futhi isetshenziswe ku-ion exchange chromatography. I-Carboxymethyl pKa cishe ingama-4 emanzini ahlanzekile futhi cishe ingama-3.5 ku-0.5mol/L NaCl. Ingumshini wokushintshanisa i-cation one-acid ebuthakathaka futhi ivame ukusetshenziselwa ukuhlukaniswa kwamaprotheni angathathi hlangothi nayisisekelo ku-pH>4. Amaqembu angaphezu kwama-40% e-hydroxyl ashintshwa amaqembu e-carboxymethyl, angancibilikiswa emanzini ukuze akhe isisombululo se-colloidal esizinzile esine-viscosity ephezulu.

Inhloso eyinhloko

I-Carboxymethylcellulose (CMC) iyimpuphu emhlophe engenabo ubuthi, engenaphunga futhi isebenza kahle futhi incibilika kalula emanzini. Isixazululo sayo samanzi siwuketshezi olucwebezelayo olungathathi hlangothi noma olune-alkaline, oluncibilika kwezinye izinhlayiya nama-resin ancibilika emanzini, futhi olungancibiliki ezinhlayiyeni eziphilayo ezifana ne-ethanol. I-CMC ingasetshenziswa njenge-binder, i-thickener, i-suspending agent, i-emulsifier, i-dispersant, i-stabilizer, i-size agent, njll.

I-Sodium carboxymethyl cellulose (CMC) ingumkhiqizo onomkhiqizo omkhulu kunayo yonke, ububanzi obukhulu bokusetshenziswa kanye nokusetshenziswa okulula kakhulu phakathi kwama-ether e-cellulose, aziwa kakhulu ngokuthi “i-industrial monosodium glutamate”.

1. Kusetshenziswa ekubhobheni uwoyela negesi yemvelo, ekumbeni imithombo kanye neminye imisebenzi

① Udaka oluqukethe i-CMC lungenza udonga lomthombo lube yikhekhe lokuhlunga elincane neliqinile elinokungena okuncane kwamanzi, okunciphisa ukulahleka kwamanzi.

② Ngemva kokufaka i-CMC odakeni, umshini wokubhoboza ungathola amandla amancane okuqala okusika, ukuze udaka lukwazi ukukhulula kalula igesi egoqwe kuwo, futhi ngesikhathi esifanayo, udoti ungalahlwa ngokushesha emgodini wodaka.

③ Udaka lokubhoboza, njengezinye izinto ezilengayo kanye nezihlakazekile, lunesikhathi esithile sokuhlala eshalofini. Ukwengeza i-CMC kungayenza iqine futhi kwandise isikhathi sokuhlala eshalofini.

④ Udaka oluqukethe i-CMC aluvamile ukuthintwa yisikhunta, ngakho-ke akudingekile ukugcina inani le-pH ephezulu nokusebenzisa izilondolozi.

⑤ Iqukethe i-CMC njenge-ejenti yokwelapha ukubhoboza uketshezi lokuhlanza udaka, olungamelana nokungcola kosawoti ohlukahlukene oncibilikayo.

⑥ Udaka oluqukethe i-CMC luzinzile futhi lunganciphisa ukulahleka kwamanzi noma ngabe izinga lokushisa lingaphezu kuka-150°C.

I-CMC enobuthi obukhulu kanye nezinga eliphezulu lokushintshana ifanele udaka olunobuthi obuphansi, kanti i-CMC enobuthi obuphansi kanye nezinga eliphezulu lokushintshana ifanele udaka olunobuthi obukhulu. Ukukhetha i-CMC kufanele kunqunywe ngokwezimo ezahlukene njengohlobo lodaka, indawo, kanye nokujula komthombo.

2. Isetshenziswa embonini yezindwangu, yokunyathelisa kanye nokudaya. Embonini yezindwangu, i-CMC isetshenziswa njenge-ejenti yokulinganisa usayizi wendwangu elula kakotini, uboya besilika, i-fiber yamakhemikhali, izinto ezihlanganisiwe nezinye izinto eziqinile;

3. Esetshenziswa embonini yephepha, i-CMC ingasetshenziswa njenge-ejenti yokushelela iphepha kanye ne-ejenti yokulinganisa embonini yephepha. Ukwengeza u-0.1% kuya ku-0.3% we-CMC epulp kungandisa amandla okuthamba kwephepha ngo-40% kuya ku-50%, kwandise ukumelana nokuqhekeka ngo-50%, futhi kwandise isici sokuxova ngezikhathi ezi-4 kuya kwezi-5.

4. I-CMC ingasetshenziswa njengesithambisi sokungcola uma ifakwa ezinhlinzini zokwenziwa; amakhemikhali ansuku zonke njengemboni yamazinyo Isixazululo samanzi se-CMC glycerol sisetshenziswa njengesisekelo sezinsini zamazinyo; imboni yezemithi isetshenziswa njengesithambisi kanye nesithambisi; Isixazululo samanzi se-CMC sisetshenziswa njengesithambisi ngemva kokujiya. Ukumba nokunye.

5. Ingasetshenziswa njenge-glue, i-plasticizer, i-ejenti yokumisa i-glaze, i-ejenti yokulungisa umbala, njll. embonini ye-ceramic.

6. Kusetshenziswa ekwakheni ukuthuthukisa ukugcinwa kwamanzi kanye namandla

7. Isetshenziswa embonini yokudla. Imboni yokudla isebenzisa i-CMC enezinga eliphezulu lokufaka esikhundleni njengesithako sokujiyisa i-ayisikhilimu, ukudla okusemathinini, ama-noodle asheshayo, kanye nesithako sokuzinzisa i-foam yebhiya. Kwezithako zokujiyisa, izihlanganisi noma ama-ejenti ahambisanayo.

8. Imboni yezemithi ikhetha i-CMC ene-viscosity efanele njenge-binder, i-ejenti yokuqhekeka kwamaphilisi, kanye ne-ejenti yokumisa okwesikhashana, njll.