Indlela yokwenza i-CMC Sodium Carboxymethyl Cellulose?

I-Sodium carboxymethyl cellulose (CMC)iyi-carboxymethylated derivative ye-cellulose, eyaziwa nangokuthi i-cellulose gum, futhi iyi-ionic cellulose gum ebaluleke kakhulu. I-CMC ngokuvamile iyi-anionic polymer compound etholakala ngokusabela i-cellulose yemvelo nge-caustic alkali kanye ne-monochloroacetic acid. Isisindo sama-molecule sale compound sisukela emashumini ezigidi kuya ezigidini eziningana.

【Izakhiwo】Impuphu emhlophe, ayinaphunga, incibilika emanzini ukuze yakhe isixazululo esinobuthi obukhulu, ayincibiliki ku-ethanol nakwezinye izinyibilikisi.

【Isicelo】Inemisebenzi yokumiswa kanye ne-emulsification, ukuhlangana okuhle kanye nokumelana nosawoti, futhi yaziwa ngokuthi “i-industrial monosodium glutamate”, esetshenziswa kabanzi.

Ukulungiswa kwe-CMC

Ngokusho kwe-etherification medium ehlukene, ukukhiqizwa kwezimboni kwe-CMC kungahlukaniswa ngezigaba ezimbili: indlela esekelwe emanzini kanye nendlela esekelwe kwi-solvent. Indlela yokusebenzisa amanzi njengendlela yokusabela ibizwa ngokuthi indlela ethwala amanzi, esetshenziselwa ukukhiqiza i-alkaline medium kanye ne-low-grade CMC; indlela yokusebenzisa i-organic solvent njengendlela yokusabela ibizwa ngokuthi indlela ye-solvent, efanelekile ekukhiqizweni kwe-CMC ephakathi nephezulu. Zombili lezi zindlela zokusabela zenziwa ku-kneader, eyingxenye yenqubo yokuxova futhi iyindlela eyinhloko yokukhiqiza i-CMC njengamanje.

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indlela esekelwe emanzini

Indlela ethwala amanzi inqubo yokukhiqiza yezimboni yangaphambilini, okuwukusabela i-alkali cellulose nge-etherifying agent esimweni se-alkali yamahhala namanzi. Ngesikhathi senqubo ye-alkaliization kanye ne-etherification, akukho medium organic ohlelweni. Izidingo zemishini yendlela ethwala amanzi zilula kakhulu, ngokutshalwa kwezimali okuncane kanye nezindleko eziphansi. Ububi ukuthi kukhona ukuntuleka kwe-medium enkulu yoketshezi, futhi ukushisa okukhiqizwa yi-reaction kwandisa izinga lokushisa, okusheshisa isivinini se-side reactions, okuholela ekusebenzeni kahle kwe-etherification okuphansi kanye nekhwalithi yomkhiqizo ephansi. Le ndlela isetshenziselwa ukulungiselela imikhiqizo ye-CMC yezinga eliphakathi neliphansi, njengezinsipho, ama-ejenti okulinganisa izindwangu, njll.

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indlela yokuxazulula

Indlela yokuxazulula i-solvent yaziwa nangokuthi indlela yokuxazulula i-organic. Isici sayo esiyinhloko ukuthi ukusabela kwe-alkalization kanye ne-etherification kwenziwa ngaphansi kwesimo sokuthi i-organic solvent isetshenziswa njengendawo yokusabela (i-diluent). Ngokwenani le-reaction diluent, ihlukaniswe ngendlela yokuxova kanye nendlela ye-slurry. Indlela yokuxazulula iyafana nenqubo yokusabela kwendlela esekelwe emanzini, futhi futhi inezigaba ezimbili ze-alkalization kanye ne-etherification, kodwa indlela yokusabela yalezi zigaba ezimbili ihlukile. Indlela yokuxazulula isusa izinqubo ezitholakala endleleni esekelwe emanzini, njengokucwilisa, ukucindezela, ukugaya, ukuguga, njll., kanye ne-alkalization kanye ne-etherification konke kwenziwa ku-kneader. Ububi ukuthi ukulawulwa kwezinga lokushisa kubi kakhulu, isidingo sesikhala kanye nezindleko ziphakeme. Vele, ekukhiqizweni kwezakhiwo ezahlukene zemishini, kuyadingeka ukulawula ngokuqinile izinga lokushisa lesistimu, isikhathi sokudla, njll., ukuze imikhiqizo enekhwalithi ephezulu kanye nokusebenza kahle ikwazi ukulungiswa. Ishadi layo lokugeleza kwenqubo liboniswe kuMfanekiso 2.

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Isimo Sokulungiswa Kwe-SodiumI-Carboxymethyl Cellulosekusuka kumikhiqizo yezolimo

Imikhiqizo engaphansi kwezitshalo inezici zokuhlukahluka nokutholakala kalula, futhi ingasetshenziswa kabanzi njengezinto zokusetshenziswa zokulungiselela i-CMC. Njengamanje, izinto zokusetshenziswa zokukhiqiza ze-CMC ziyi-cellulose ehlungiwe kakhulu, okuhlanganisa i-cotton fiber, i-cassava fiber, i-straw fiber, i-bamboo fiber, i-wheat straw fiber, njll. Kodwa-ke, ngokukhuthazwa okuqhubekayo kwezicelo ze-CMC kuzo zonke izindlela zokuphila, ngaphansi kwezinsizakusebenza zokucubungula izinto zokusetshenziswa eziluhlaza ezikhona, indlela yokusebenzisa imithombo eshibhile nebanzi yezinto zokusetshenziswa zokusetshenziswa zokulungiselela i-CMC ngokuqinisekile izoba yinto ebalulekile.

I-Outlook

I-Sodium carboxymethyl cellulose ingasetshenziswa njenge-emulsifier, i-flocculant, i-thickener, i-chelating agent, i-ejenti yokugcina amanzi, i-adhesive, i-ejenti yokulinganisa, izinto zokwakha ifilimu, njll. Isetshenziswa kabanzi kuma-elekthronikhi, esikhumbeni, epulasitikini, ekunyatheliseni, ezintweni zobumba, ekusetshenzisweni kwansuku zonke. Amakhemikhali nakwamanye amasimu, futhi ngenxa yokusebenza kwayo okuhle kakhulu kanye nobubanzi bokusetshenziswa, isathuthukisa njalo amasimu amasha okusetshenziswa. Namuhla, ngaphansi kokusabalala kabanzi komqondo wokukhiqizwa kwamakhemikhali aluhlaza, ucwaningo lwangaphandle mayelanaI-CMCUbuchwepheshe bokulungiselela bugxile ekufuneni izinto zokusetshenziswa eziphilayo ezishibhile nezilula ukuzithola kanye nezindlela ezintsha zokuhlanzwa kwe-CMC. Njengezwe elinemithombo eminingi yezolimo, izwe lami lisekuguqulweni kwe-cellulose. Ngokuphathelene nobuchwepheshe, linezinzuzo zezinto zokusetshenziswa, kodwa futhi kunezinkinga ezifana nokungahambisani enkambisweni yokulungiselela okubangelwa imithombo ehlukahlukene yemicu ye-cellulose ye-biomass kanye nomehluko omkhulu ezingxenyeni. Kusekhona ukuntuleka kokwanele kokusetshenziswa kwezinto ze-biomass, ngakho-ke impumelelo eyengeziwe kulezi zindawo idinga ukwenziwa ucwaningo olunzulu.