I-Carboxymethyl cellulose (CMC) itholakala ngemuva kwe-carboxymethylation ye-cellulose. Isixazululo saso samanzi sinemisebenzi yokuqina, ukwenza ifilimu, ukubopha, ukugcinwa kwamanzi, ukuvikelwa kwe-colloid, i-emulsification kanye nokumiswa, futhi isetshenziswa kabanzi ku-petroleum, ukudla, imithi, njll, izimboni zendwangu kanye nephepha, ingenye yezimboni ezibaluleke kakhulu. i-cellulose ethers.I-cellulose yemvelo iyi-polysaccharide esabalaliswe kakhulu futhi etholakala kakhulu ngokwemvelo, futhi imithombo yayo inamandla kakhulu. ocebile. Ubuchwepheshe bamanje bokuguqula i-cellulose bugxile kakhulu etherification kanye ne-esterification. I-Carboxymethylation uhlobo lobuchwepheshe be-etherification.
izakhiwo zomzimba
I-sodium carboxymethyl cellulose (CMC) i-anionic cellulose ether, enempushana ye-flocculent emhlophe noma ephuzi kancane noma ukubukeka kwempushana emhlophe, engenaphunga, ayinambitheki, engenabuthi; i-soluble kalula emanzini abandayo noma emanzini ashisayo, okwenza isisombululo esithile esicacile se-viscosity. Isixazululo asithathi hlangothi noma sine-alkaline kancane, asincibiliki ku-ethanol, ether, isopropanol, acetone nezinye izinyibilikisi eziphilayo, zincibilika ku-60% ethanol equkethe amanzi noma isixazululo se-acetone. I-hygroscopic, izinzile ekukhanyeni nasekushiseni, i-viscosity iyancipha ngokukhuphuka kwezinga lokushisa, isixazululo sizinzile ku-pH 2-10, i-pH ingaphansi kuka-2, kunemvula eqinile, futhi i-viscosity iyancipha lapho i-pH ingaphezu kuka-10. Izinga lokushisa lokushintsha umbala lingama-227 ℃, izinga lokushisa le-carbonization lingu-252 ℃, futhi ukushuba kwangaphezulu kwesisombululo samanzi ngu-2% 71mn/n.
izakhiwo zamakhemikhali
Ilungiswa ngokuphuma kokunye okuphuma ku-cellulose kwe-carboxymethyl substituents, yelapha i-cellulose nge-sodium hydroxide ukwenza i-alkali cellulose, bese isabela nge-monochloroacetic acid. Iyunithi ye-glucose eyakha i-cellulose inamaqembu angu-3 e-hydroxyl angashintshwa, ngakho imikhiqizo enamazinga ahlukene okushintsha ingatholakala. Ngokwesilinganiso, i-1 mmol ye-carboxymethyl yethulwa nge-1 g yesisindo esomile, engancibiliki emanzini futhi i-dilute acid, kodwa ingavuvukala futhi isetshenziselwe i-ion exchange chromatography. I-Carboxymethyl pKa icishe ibe yi-4 emanzini ahlanzekile futhi icishe ibe ngu-3.5 ku-0.5mol/L NaCl. Iwukushintshanisa kwe-cation ene-asidi ebuthakathaka futhi ngokuvamile isetshenziselwa ukuhlukanisa amaprotheni angathathi hlangothi nayisisekelo ku-pH>4. Ngaphezu kwe-40% yamaqembu e-hydroxyl athathelwa indawo ngamaqembu e-carboxymethyl, angancibilika emanzini ukuze akhe isisombululo esizinzile se-high-viscosity colloidal.
Inhloso eyinhloko
I-Carboxymethyl cellulose (CMC) iyi-flocculent powder engenabuthi futhi engenaphunga esebenza ngokuzinzile futhi inyibilika kalula emanzini. Isixazululo saso esinamanzi siwuketshezi lwe-viscous olune-alkali olungathathi hlangothi noma olune-alkali, oluncibilika kwamanye amaglue nama-resin ancibilika emanzini, futhi aluncibiliki. kuma-solvents ephilayo njenge-ethanol. I-CMC ingasetshenziswa njenge-adhesive, thickener, i-ejenti yokumisa, i-emulsifier, i-dispersant, i-stabilizer, i-ejenti yokulinganisa, njll.
I-sodium carboxymethyl cellulose (CMC) iwumkhiqizo onomkhiqizo omkhulu kakhulu, osetshenziswa kabanzi futhi osebenziseka kalula phakathi kwama-cellulose ethers, aziwa kakhulu ngokuthi “i-industrial monosodium glutamate”.
1. Isetshenziselwa ukugaya uwoyela negesi yemvelo, ukumba imithombo kanye neminye imisebenzi
① Udaka oluqukethe i-CMC lungenza udonga lomthombo lube ikhekhe eliyisihlungi elincanyana neliqinile elikwazi ukungena kalula, elinciphisa ukulahleka kwamanzi.
② Ngemva kokwengeza i-CMC odakeni, umshini wokumba ungathola amandla okugunda okuqala aphansi, ukuze udaka lukhulule kalula igesi egoqwe kulo, futhi ngesikhathi esifanayo, udoti ulahlwa ngokushesha emgodini wodaka.
③Ukumba udaka, njengezinye izinto ezihlakazekayo zokumiswa, kunesikhathi esithile sokuba khona, futhi ukungezwa kwe-CMC kungayenza izinze futhi kwelule isikhathi sokuba khona.
④ Udaka oluqukethe i-CMC aluvamile ukuthintwa isikhunta, ngakho-ke akudingekile ukugcina ivelu ye-pH ephezulu nokusebenzisa izilondolozi.
⑤ Iqukethe i-CMC njenge-ejenti yokwelapha uketshezi oluwasha udaka, engamelana nokungcoliswa kukasawoti omningi oncibilikayo.
⑥ Udaka oluqukethe i-CMC lunozinzo oluhle futhi lunganciphisa ukulahlekelwa kwamanzi ngisho noma izinga lokushisa lingaphezu kuka-150℃.
I-CMC ene-viscosity ephezulu kanye nezinga eliphakeme lokushintshwa lilungele udaka olunomthamo ophansi, futhi i-CMC ene-viscosity ephansi kanye nezinga eliphezulu lokushintshwa lifanele udaka olunomthamo omkhulu. Ukukhethwa kwe-CMC kufanele kunqunywe ngokwemibandela ehlukene njengohlobo lodaka, isifunda kanye nokujula kwemithombo.
2. Isetshenziswa embonini yendwangu, yokunyathelisa kanye nokudaya. Imboni yezindwangu isebenzisa i-CMC njenge-ejenti yokulinganisa ukulinganisa kwentambo kakotini, uboya bukasilika, imicu yamakhemikhali, inhlanganisela nezinye izinto eziqinile;
3. Isetshenziswa embonini yephepha i-CMC ingasetshenziswa njenge-ejenti yokushelela phezulu kwephepha kanye ne-ejenti yokulinganisa embonini yephepha. Ukwengeza u-0.1% kuya ku-0.3% we-CMC ku-pulp kungathuthukisa amandla okuqina ephepha ngo-40% kuya ku-50%, kukhuphule ukuphuka okucindezelayo ngo-50%, futhi kwandise ukuguqeka izikhathi ezi-4 kuya kwezi-5.
4. I-CMC ingasetshenziswa njenge-adsorbent yokungcola uma yengezwe kuzinto zokwenziwa zokuhlanza; amakhemikhali ansuku zonke njengemboni yokuxubha amazinyo e-CMC glycerin solution aqueous isetshenziswa njengesisekelo sezinsini somuthi wokuxubha; imboni yezemithi isetshenziswa njenge-thickener kanye ne-emulsifier; Isixazululo samanzi se-CMC sijiyile futhi sisetshenziselwa ukucubungula amaminerali antantayo, njll.
5. Embonini ye-ceramic, ingasetshenziswa njenge-adhesive, plasticizer, i-ejenti yokumisa i-glaze, i-ejenti yokulungisa umbala, njll.
6. Isetshenziswa ekwakheni ukuthuthukisa ukugcinwa kwamanzi namandla
7. Isetshenziswa embonini yokudla. Imboni yezokudla isebenzisa i-CMC eneziqu eziphakeme zokushintsha njengesithako sika-ayisikhilimu, ukudla okusemathinini, ama-noodle aphekwa ngokushesha, kanye nesiqinisi segwebu likabhiya, njll. Okokujiya, okuhlanganisayo noma okusizayo.
8. Imboni yezokwenziwa kwemithi ikhetha i-CMC ene-viscosity efanele njengesibophezelo sethebhulethi, i-disntegrant, kanye ne-ejenti emiswayo ukuze imiswe.
Isikhathi sokuthumela: Nov-03-2022