Inkqubo yokuvelisa i-sodium carboxymethylcellulose

Inkqubo yokwenziwa kwe-sodium carboxymethylcellulose (CMC) ibandakanya amanyathelo aliqela, kuquka ukulungiswa kwe-cellulose, ukufakelwa kwe-ether, ukucoca, kunye nokomisa. Nantsi ingcaciso yenkqubo eqhelekileyo yokwenziwa:

1. Ukulungiswa kweCellulose: Le nkqubo iqala ngokulungiswa kwecellulose, edla ngokuvela kwi-pulp yomthi okanye kwi-cotton linters. I-cellulose iqala icocwe kwaye icocwe ukuze kususwe ukungcola okufana ne-lignin, i-hemicellulose, kunye nezinye izinto ezingcolisayo. Le cellulose icociweyo isebenza njengezinto zokuqala ukuvelisa i-CMC.
2. I-Alkalization: I-cellulose ecociweyo inyangwa ngesisombululo se-alkaline, esidla ngokuba yi-sodium hydroxide (NaOH), ukuze yonyuse i-reactivity yayo kwaye iququzelele i-etherification reaction elandelayo. I-Alkalization ikwanceda ekudumbeni nasekuvuleni iifayibha ze-cellulose, nto leyo eyenza ukuba zifikeleleke lula xa kutshintshwa iikhemikhali.
3. I-Etherification Reaction: I-alkalized cellulose isabela nge-monochloroacetic acid (MCA) okanye ityuwa yayo yesodium, i-sodium monochloroacetate (SMCA), xa kukho i-catalyst phantsi kweemeko ezilawulwayo. Le mpendulo ye-etherification ibandakanya ukutshintshwa kwamaqela e-hydroxyl kwi-cellulose chains ngamaqela e-carboxymethyl (-CH2COONa). I-degree of substitution (DS), emele inani eliqhelekileyo lamaqela e-carboxymethyl ngeyunithi ye-glucose ye-cellulose chain, inokulawulwa ngokulungelelanisa iiparameter ze-reaction ezifana nobushushu, ixesha le-reaction, kunye noxinzelelo lwe-reactant.
4. Ukungaguquguquki: Emva kwempendulo ye-etherification, imveliso ephumayo iyaguquguquki ukuze kuguqulwe nawaphi na amaqela e-acid aseleyo abe yifom yetyuwa yesodium (i-carboxymethylcellulose sodium). Oku kudla ngokufezekiswa ngokongeza isisombululo se-alkaline, njenge-sodium hydroxide (NaOH), kumxube wempendulo. Ukungaguquguquki kukwanceda ukulungisa i-pH yesisombululo kunye nokuzinzisa imveliso ye-CMC.
5. Ukucoca: I-sodium carboxymethylcellulose ekrwada iyahlanjululwa ukuze kususwe ukungcola, izinto ezingasebenziyo, kunye neemveliso eziphuma kumxube we-reaction. Iindlela zokucoca zinokubandakanya ukuhlamba, ukucoca, ukucoca, kunye nokomisa. I-CMC ecociweyo ihlanjwa ngamanzi ukususa i-alkali eseleyo kunye neetyuwa, kulandele ukucoca okanye ukucoca ukuze kwahlulwe imveliso eqinileyo ye-CMC kwisigaba solwelo.
6. Ukomisa: I-sodium carboxymethylcellulose ecociweyo ekugqibeleni yomiswa ukuze kususwe umswakama ogqithisileyo kwaye kufunyanwe umxholo womswakama ofunekayo wokugcina kunye nokuqhubekeka nokucubungula. Iindlela zokomisa zingabandakanya ukomisa ngomoya, ukomisa ngokutshiza, okanye ukomisa ngedrama, kuxhomekeke kwiimpawu zemveliso ezifunwayo kunye nomlinganiselo wokuvelisa.

Imveliso ye-sodium carboxymethylcellulose ephumayo yi-powder emhlophe ukuya kwemhlophe okanye izinto ezi-granular ezinyibilikayo emanzini kunye neempawu ze-rheological. Isetyenziswa kakhulu njenge-ejenti yokutyeba, i-stabilizer, i-binder, kunye ne-rheology modifier kumashishini ahlukeneyo, kubandakanya ukutya, amayeza, izinto zokuthambisa, amalaphu kunye nokusetyenziswa kwemizi-mveliso.