I-Carboxymethyl cellulose (CMC) itholakala ngemuva kokufakwa kwe-carboxymethylation kwe-cellulose. Isixazululo sayo samanzi sinemisebenzi yokuqina, ukwakha ifilimu, ukubopha, ukugcinwa kwamanzi, ukuvikelwa kwe-colloid, i-emulsification kanye nokumiswa, futhi isetshenziswa kabanzi embonini kaphethiloli, ukudla, imithi, njll., izimboni zezindwangu nephepha, ingenye yama-ether e-cellulose abaluleke kakhulu. I-cellulose yemvelo iyi-polysaccharide esakazwa kabanzi futhi eningi kakhulu emvelweni, futhi imithombo yayo icebile kakhulu. Ubuchwepheshe bamanje bokuguqulwa kwe-cellulose bugxile kakhulu ekufakweni kwe-ether kanye ne-esterification. I-Carboxymethylation uhlobo lobuchwepheshe be-etherification.
izakhiwo ezibonakalayo
I-Sodium carboxymethyl cellulose (CMC) iyi-anionic cellulose ether, enophawuda wefayibha omhlophe noma ophuzi kancane ofana ne-flocculent noma i-white powder ebukeka njenge-powder, ayinaphunga, ayinambitheki, ayinabuthi; incibilika kalula emanzini abandayo noma emanzini ashisayo, 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, sincibilika kusisombululo se-ethanol noma se-acetone esiqukethe amanzi esingu-60%. Siyi-hygroscopic, sizinzile ekukhanyeni nasekushiseni, i-viscosity iyancipha ngokwanda kwezinga lokushisa, isixazululo sizinzile ku-pH 2-10, i-pH ingaphansi kuka-2, kunemvula eqinile, futhi i-viscosity iyancipha lapho i-pH iphakeme kuno-10. Izinga lokushisa lokushintsha kombala lingu-227℃, izinga lokushisa le-carbonization lingu-252℃, kanti ukucindezelwa kobuso besisombululo samanzi esingu-2% kungu-71mn/n.
izakhiwo zamakhemikhali
Ilungiswa kusuka kuma-derivatives e-cellulose e-carboxymethyl substituents, elapha i-cellulose nge-sodium hydroxide ukuze yakhe i-alkali cellulose, bese isabela nge-monochloroacetic acid. Iyunithi ye-glucose eyakha i-cellulose inamaqembu ama-hydroxyl amathathu angashintshwa, ngakho-ke imikhiqizo enamazinga ahlukene okushintsha ingatholakala. Ngokwesilinganiso, i-1 mmol ye-carboxymethyl yethulwa nge-1 g yesisindo esomile, enganyibiliki emanzini futhi incibilikise i-asidi, kodwa ingavuvukala futhi isetshenziselwe i-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-Carboxymethyl cellulose (CMC) iyimpuphu emhlophe engenabo ubuthi futhi engenaphunga enokusimama okuzinzile futhi incibilika kalula emanzini. Isixazululo sayo samanzi siwuketshezi olucwebezelayo olungathathi hlangothi noma olune-alkaline, oluncibilika kwezinye izinhlayiya nama-resin ancibilika emanzini, futhi olungancibiliki. ezinyibilikisini eziphilayo ezifana ne-ethanol. I-CMC ingasetshenziswa njenge-glue, 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, osetshenziswa kakhulu futhi osetshenziswa kalula phakathi kwama-ether e-cellulose, aziwa kakhulu ngokuthi “i-industrial monosodium glutamate”.
1. Isetshenziselwa ukumba uwoyela negesi yemvelo, ukumba 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 ulahlwe ngokushesha emgodini wodaka.
③Udaka lokubhoboza, njengezinye izihlakala zokusatshalaliswa, lunesikhathi esithile sokuba khona, futhi ukwengezwa kwe-CMC kungayenza izinze futhi kwandise isikhathi sokuba khona.
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 uketshezi lokugeza udaka, engamelana nokungcola kosawoti ohlukahlukene oncibilikayo.
⑥ Udaka oluqukethe i-CMC luzinzile futhi lunganciphisa ukulahleka kwamanzi noma ngabe izinga lokushisa lingaphezu kuka-150℃.
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. Ukukhethwa kwe-CMC kufanele kunqunywe ngokwezimo ezahlukene njengohlobo lodaka, indawo kanye nokujula komthombo.
2. Isetshenziswa embonini yezindwangu, yokunyathelisa kanye nokudaya. Imboni yezindwangu isebenzisa i-CMC 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 ubuso bephepha kanye ne-ejenti yokulinganisa embonini yephepha. Ukwengeza i-CMC engu-0.1% kuya ku-0.3% epalini kungathuthukisa amandla okunamathela ephepha ngo-40% kuya ku-50%, kwandise ukuqhekeka kokucindezela ngo-50%, futhi kwandise ukuxovwa izikhathi ezingu-4 kuya kwezi-5.
4. I-CMC ingasetshenziswa njengesithambisi sokungcola uma ifakwa ezinhlinzini zokwenziwa; amakhemikhali ansuku zonke njengemboni yamazinyo Isixazululo samanzi se-CMC glycerin sisetshenziswa njengesisekelo sezinsini samazinyo; imboni yezemithi isetshenziswa njengesithambisi kanye nesithambisi; Isixazululo samanzi se-CMC siyaqina futhi sisetshenziselwa ukucubungula amaminerali antantayo, njll.
5. Embonini yobumba, ingasetshenziswa njenge-glue, i-plasticizer, i-ejenti yokumisa i-glaze, i-ejenti yokulungisa umbala, njll.
6. Kusetshenziswa ekwakheni ukuthuthukisa ukugcinwa kwamanzi kanye namandla
7. Isetshenziswa embonini yokudla. Imboni yokudla isebenzisa i-CMC enezinga eliphezulu lokushintshanisa njenge-thickener ye-ayisikhilimu, ukudla okusemathinini, ama-noodle aphekiwe ngokushesha, kanye ne-foam stabilizer yebhiya, njll. Kwezinto zokuthibela, izihlanganisi noma izinto ezisizayo.
8. Imboni yezemithi ikhetha i-CMC ene-viscosity efanele njenge-tablet binder, disintegrant, kanye ne-agent yokumisa okwesikhashana.
Isikhathi sokuthunyelwe: Novemba-03-2022