Sodium carboxymethyl cellulose (CMC)yog carboxymethylated derivative ntawm cellulose, tseem hu ua cellulose gum, thiab yog cov pos hniav ionic cellulose tseem ceeb tshaj plaws. CMC feem ntau yog anionic polymer compound tau los ntawm reacting natural cellulose nrog caustic alkali thiab monochloroacetic acid. Qhov hnyav molecular ntawm qhov sib xyaw ua ke los ntawm kaum tawm lab mus rau ntau lab.
【Properties】 Cov hmoov dawb, tsis muaj ntxhiab, soluble hauv dej los tsim cov tshuaj viscosity siab, insoluble hauv ethanol thiab lwm cov kuab tshuaj.
【Daim ntawv thov】 Nws muaj lub luag haujlwm ntawm kev ncua thiab emulsification, zoo cohesion thiab ntsev tsis kam, thiab hu ua "kev lag luam monosodium glutamate", uas yog dav siv.
Kev npaj CMC
Raws li qhov sib txawv etherification nruab nrab, kev tsim khoom ntawm CMC tuaj yeem muab faib ua ob pawg: dej-raws li txoj kev thiab cov txheej txheem hnyav. Cov txheej txheem ntawm kev siv dej raws li qhov nruab nrab cov tshuaj tiv thaiv yog hu ua txoj kev ua dej, uas yog siv los tsim cov alkaline nruab nrab thiab qib qis CMC; cov txheej txheem ntawm kev siv cov organic hnyav raws li qhov nruab nrab cov tshuaj tiv thaiv yog hu ua cov txheej txheem hnyav, uas yog tsim rau cov khoom nruab nrab thiab qib siab CMC. Ob qho kev tawm tsam no tau ua tiav hauv lub tshuab kneader, uas yog cov txheej txheem kneading thiab yog txoj hauv kev tseem ceeb rau kev tsim CMC tam sim no.
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dej raws li txoj kev
Cov txheej txheem dej-dej yog txheej txheem kev lag luam ua ntej, uas yog ua kom muaj kev cuam tshuam alkali cellulose nrog tus neeg sawv cev etherifying nyob rau hauv cov xwm txheej ntawm dawb alkali thiab dej. Thaum lub sij hawm alkalization thiab etherification txheej txheem, tsis muaj cov organic nruab nrab hauv lub cev. Cov cuab yeej siv ntawm txoj kev siv dej yog qhov yooj yim, nrog kev nqis peev tsawg thiab tus nqi qis. Qhov tsis zoo yog tias tsis muaj qhov loj ntawm cov kua nruab nrab, thiab cov cua sov uas tsim los ntawm cov tshuaj tiv thaiv ua rau muaj qhov kub thiab txias, uas ua rau kom nrawm nrawm ntawm cov tshuaj tiv thaiv sab, ua rau tsis muaj etherification efficiency thiab cov khoom tsis zoo. Txoj kev no yog siv los npaj cov khoom nruab nrab thiab qib qis CMC, xws li cov tshuaj ntxuav tes, cov khoom siv textile sizing, thiab lwm yam.
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txoj kev hnyav
Cov txheej txheem hnyav kuj tseem hu ua cov txheej txheem organic hnyav. Nws lub ntsiab feature yog hais tias lub alkalization thiab etherification cov tshuaj tiv thaiv yog nqa tawm nyob rau hauv lub mob uas cov organic solvent yog siv raws li cov tshuaj tiv thaiv nruab nrab (diluent). Raws li tus nqi ntawm cov tshuaj tiv thaiv diluent, nws muab faib ua txoj kev kneading thiab slurry txoj kev. Cov txheej txheem hnyav yog tib yam li cov txheej txheem tshuaj tiv thaiv ntawm cov txheej txheem dej, thiab nws kuj muaj ob theem ntawm alkalization thiab etherification, tab sis cov tshuaj tiv thaiv nruab nrab ntawm ob theem no txawv. Cov txheej txheem hnyav tshem tawm cov txheej txheem uas muaj nyob rau hauv cov dej raws li txoj kev, xws li soaking, squeezing, pulverizing, laus, thiab lwm yam., thiab cov alkalization thiab etherification yog tag nrho cov ua nyob rau hauv ib tug kneader. Qhov tsis zoo yog tias qhov ntsuas kub tswj tau qhov tsis zoo, qhov chaw yuav tsum tau muaj thiab tus nqi siab. Tau kawg, rau kev tsim cov khoom siv sib txawv, nws yog ib qho tsim nyog yuav tsum nruj me ntsis tswj lub cev kub, lub sij hawm pub mis, thiab lwm yam, kom cov khoom uas muaj cov khoom zoo thiab kev ua tau zoo tuaj yeem npaj tau. Nws cov txheej txheem flow chart yog qhia nyob rau hauv daim duab 2.
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Cov xwm txheej ntawm Kev Npaj SodiumCarboxymethyl Celluloselos ntawm Agricultural By-products
Cov qoob loo los ntawm cov khoom lag luam muaj cov yam ntxwv ntawm ntau yam thiab muaj kev yooj yim, thiab tuaj yeem siv dav los ua cov khoom siv raw rau kev npaj CMC. Tam sim no, CMC cov khoom siv raw yog cov khoom siv ua kom zoo dua qub, suav nrog cov paj rwb fiber ntau, cassava fiber, straw fiber, xyoob fiber ntau, nplej straw fiber, thiab lwm yam. Txawm li cas los xij, nrog kev nce qib ntawm CMC daim ntaub ntawv nyob rau hauv txhua qhov chaw ntawm lub neej, raws li cov khoom siv raw khoom tam sim no, yuav siv li cas pheej yig dua thiab dav ntawm cov khoom siv raw rau CMC npaj yuav ua kom pom tseeb.
Outlook
Sodium carboxymethyl cellulose tuaj yeem siv los ua emulsifier, flocculant, thickener, chelating agent, dej-retaining agent, adhesive, sizing agent, film-forming material, thiab lwm yam. Nws yog dav siv hauv electronics, tawv, plastics, printing, ceramics, niaj hnub siv tshuaj thiab lwm yam kev lag luam, thiab vim hais tias ntawm ntau yam, nws tseem siv tau zoo heev nyob rau hauv daim ntawv thov kev loj hlob thiab kev loj hlob. Niaj hnub no, nyob rau hauv kev nthuav dav dav ntawm lub tswv yim ntawm kev tsim tshuaj ntsuab ntsuab, kev tshawb fawb txawv teb chaws ntawmCMCkev npaj tshuab tsom mus rau kev tshawb nrhiav pheej yig thiab yooj yim-rau-tau cov khoom siv roj ntsha thiab cov txheej txheem tshiab rau CMC purification. Raws li lub teb chaws uas muaj kev ua liaj ua teb loj, kuv lub teb chaws yog nyob rau hauv kev hloov kho cellulose Nyob rau hauv cov nqe lus ntawm kev siv technology, nws muaj qhov zoo ntawm raw cov ntaub ntawv, tab sis kuj muaj teeb meem xws li inconsistency nyob rau hauv cov txheej txheem ntawm kev npaj los ntawm ntau qhov chaw ntawm biomass cellulose fibers thiab loj sib txawv nyob rau hauv lub Cheebtsam. Tseem muaj qhov tsis txaus ntawm kev siv cov khoom siv biomass txaus, yog li kev ua tiav ntxiv hauv cov cheeb tsam no yuav tsum tau ua tiav kev tshawb fawb ntau.
Lub sij hawm xa tuaj: Plaub Hlis-25-2024