I-Carboxymethyl cellulose (CMC) itholakala ngemuva kwe-carboxymethylation ye-cellulose. Isixazululo saso samanzi sinemisebenzi yokuqina, ukwakheka kwefilimu, ukunamathela, ukugcinwa kwamanzi, ukuvikelwa kwe-colloid, i-emulsification kanye nokumiswa, njll. Isetshenziswa kabanzi ku-petroleum, ukudla, imithi, izimboni zendwangu kanye nephepha, ingenye ye-cellulose ethers ebaluleke kakhulu. .I-cellulose yemvelo iyi-polysaccharide esatshalaliswa kakhulu futhi eningi kakhulu ngokwemvelo, futhi imithombo yayo inothe kakhulu. Ubuchwepheshe bamanje bokuguqula i-cellulose bugxile kakhulu etherification kanye ne-esterification. I-Carboxymethylation reaction iwuhlobo lobuchwepheshe be-etherification.
izakhiwo zomzimba
I-Sodium carboxymethylcellulose (CMC) i-anionic cellulose ether. Ukubukeka kwayo kumhlophe noma kuphuzi kancane i-flocculent fiber powder noma impushana emhlophe, ayinaphunga, ayinambitheki, futhi ayinabuthi; incibilika kalula emanzini abandayo noma ashisayo futhi yakha i-viscosity ethile. isixazululo esobala. Isixazululo asithathi hlangothi noma sine-alkaline kancane, asincibiliki ku-ethanol, ether, isopropanol, acetone nezinye izinyibilikisi eziphilayo, kodwa sincibilika ku-60% ethanol noma isixazululo se-acetone. I-hygroscopic futhi izinzile ekukhanyeni nasekushiseni. I-viscosity iyancipha ngokunyuka kwezinga lokushisa. Isixazululo sizinzile ku-pH 2-10. Lapho i-pH ingaphansi kuka-2, izinto eziqinile ziyaqina. Lapho i-pH ingaphezu kuka-10, i-viscosity iyancipha. Izinga lokushisa lokushintsha umbala lingama-227°C, izinga lokushisa le-carbonization lingu-252°C, futhi ukushuba kwesimo se-aqueous 2% ngu-71mn/n.
izakhiwo zamakhemikhali
Itholakala ngokwelapha i-cellulose ngezinto ezifakwa esikhundleni se-carboxymethyl, ukwelapha i-cellulose nge-sodium hydroxide ukwenza i-alkali cellulose, bese isabela nge-monochloroacetic acid. Iyunithi ye-glucose eyakha i-cellulose inamaqembu amathathu e-hydroxyl angashintshwa, ngakho imikhiqizo enamazinga ahlukene okushintsha ingatholakala. Ngokwesilinganiso, i-1mmol yeqembu le-carboxymethyl nge-1g yesisindo esomile ayincibiliki emanzini futhi ixube i-asidi, 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-Carboxymethylcellulose (CMC) iyi-flocculent powder engenabuthi, engenaphunga esebenza ngokuzinzile futhi inyibilika kalula emanzini. Isixazululo saso esinamanzi siwuketshezi olubonakalayo lwe-viscous olungathathi hlangothi noma olune-alkali, oluncibilika kwamanye amaglue nama-resin ancibilika emanzini, futhi aluncibiliki kuzincibilikisi zemvelo njenge-ethanol. I-CMC ingasetshenziswa njenge-binder, i-thickener, i-ejenti yokumisa, i-emulsifier, i-dispersant, i-stabilizer, i-ejenti yokulinganisa, njll.
I-sodium carboxymethyl cellulose (CMC) iwumkhiqizo onokukhipha okukhulu kakhulu, uhla olubanzi kakhulu lokusetshenziswa kanye nokusetshenziswa okulula kakhulu phakathi kwama-cellulose ether, aziwa kakhulu ngokuthi “i-industrial monosodium glutamate”.
1. Isetshenziselwa ukugaya uwoyela negesi yemvelo, ukumba kahle namanye amaphrojekthi
① Udaka oluqukethe i-CMC lungenza udonga lomthombo lube ikhekhe eliyisihlungi elincanyana neliqinile elikwazi ukungena kalula, linciphise ukulahlekelwa kwamanzi.
② Ngemva kokwengeza i-CMC odakeni, umshini wokumba ungathola amandla okugunda okuqala aphansi, ukuze udaka lukhulule kalula igesi egoqwe kulo, futhi ngesikhathi esifanayo, imfucumfucu ingalahlwa ngokushesha emgodini wodaka.
③ Ukumba udaka, njengokunye ukumiswa nokuhlakazeka, kunokuphila kweshalofu elithile. Ukwengeza i-CMC kungayenza izinze futhi kwelule impilo yeshalofu.
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 yokumba uketshezi olukhipha udaka, olungamelana nokungcoliswa kukasawoti omningi oncibilikayo.
⑥ Udaka oluqukethe i-CMC lunozinzo oluhle futhi lunganciphisa ukulahlekelwa kwamanzi ngisho noma izinga lokushisa lingaphezu kuka-150°C.
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 ngokuvumelana nezimo ezahlukene ezifana nohlobo lodaka, isifunda, nokujula kwemithombo.
2. Isetshenziswa ezimbonini zendwangu, zokuphrinta nezokudaya. Embonini yendwangu, i-CMC isetshenziswa njenge-ejenti yokulinganisa ukulinganisa kwentambo kakotini, uboya besilika, i-chemical fiber, i-blended nezinye izinto eziqinile;
3. Isetshenziswa 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 ku-pulp kungakhuphula amandla okuqinile ephepha ngo-40% kuya ku-50%, kukhuphule ukumelana nokuqhekeka ngo-50%, futhi kwandise impahla yokuxova izikhathi ezingu-4 kuya kwezi-5.
4. I-CMC ingasetshenziswa njenge-adsorbent yokungcola uma yengezwe kuzinto zokwenziwa zokuhlanza; amakhemikhali nsuku zonke njengemboni yokuxubha amazinyo e-CMC glycerol solution aqueous isetshenziswa njengesisekelo somuthi wokuxubha izinsini; imboni yemithi isetshenziswa njenge-thickener kanye ne-emulsifier; Isixazululo esinamanzi se-CMC sisetshenziswa njengentanta ngemva kokuqina Kwezimayini nokunye.
5. Ingasetshenziswa njenge-adhesive, plasticizer, i-ejenti yokumisa i-glaze, i-ejenti yokulungisa umbala, njll embonini ye-ceramic.
6. Isetshenziswa ekwakheni ukuthuthukisa ukugcinwa kwamanzi namandla
7. Kusetshenziswa embonini yokudla. Imboni yezokudla isebenzisa i-CMC enezinga eliphezulu lokushintshwa njengesithako sika-ayisikhilimu, ukudla okusemathinini, ama-noodle asheshayo, kanye nesiqinisi segwebu likabhiya. Okwama-thickeners, ama-binder noma ama-conformal agents.
8. Imboni yezemithi ikhetha i-CMC ene-viscosity efanele njenge-binder,
i-ejenti ehlakazayo yamaphilisi, kanye ne-ejenti yokumisa ukumiswa, njll.
Isikhathi sokuthumela: Nov-24-2022