Thaum nws los txog rau solubility ntawm methyl cellulose, nws tsuas yog hais txog solubility ntawm sodium carboxymethyl cellulose.
Sodium carboxymethyl cellulose yog cov hmoov dawb los yog yellowish flocculent fiber, uas tsis muaj ntxhiab thiab tsis qab. Nws yog yooj yim soluble nyob rau hauv dej txias los yog kub, tsim ib tug pob tshab tov nrog ib tug tej yam viscosity.
Solubility yog dab tsi? Qhov tseeb, nws yog hais txog qhov loj ntawm cov kuab tshuaj yaj los ntawm ib yam khoom uas nyob rau hauv ib tug kuj saturated lub xeev nyob rau hauv 100g ntawm hnyav ntawm ib tug tej yam kub. Qhov no yog solubility. Lub solubility ntawm methyl cellulose muaj feem xyuam rau ob yam. Ntawm qhov tod tes, nws nyob ntawm tus yam ntxwv ntawm carboxymethyl cellulose, thiab ntawm qhov tod tes, nws muaj kev sib raug zoo me ntsis nrog rau sab nraud kub, av noo, siab, hnyav hom, thiab lwm yam. Lub solubility ntawm carboxymethyl cellulose feem ntau pom tseeb cuam tshuam los ntawm kub, thiab nws yuav nce nrog qhov nce ntawm qhov kub thiab txias.
Muaj peb txoj hauv kev ntawm kev ua kom methylcellulose:
1. Organic solvent wetting method. Txoj kev no tsuas yog ua kom tawg lossis ntub dej MC cov kuab tshuaj xws li ethanol thiab ethylene glycol ua ntej, thiab tom qab ntawd ntxiv dej kom yaj.
2. Cov txheej txheem dej kub. Vim tias MC yog insoluble hauv dej kub, MC tuaj yeem sib npaug sib npaug hauv cov dej kub thaum pib. Thaum txias, ob txoj hauv qab no tuaj yeem ua raws:
(1) Ua ntej koj tuaj yeem ntxiv cov dej kub uas tsim nyog rau lub thawv thiab ua kom sov li ntawm 70 ° C. MC tau maj mam ntxiv nrog qeeb stirring, maj mam ua ib slurry, uas yog ces txias nrog stirring.
(2) Ntxiv 1/3 ntawm cov dej uas xav tau rau hauv lub thawv ruaj khov, ua kom sov rau 70 ° C, thiab tawg MC raws li txoj kev tau hais tseg, thiab tom qab ntawd npaj cov dej kub slurry; ces ntxiv rau dej txias Mus rau slurry, do zoo thiab txias qhov sib tov.
3. Txoj kev sib tov hmoov. Txoj kev no tsuas yog txhawm rau txhawm rau MC hmoov cov khoom thiab sib npaug ntawm cov hmoov sib tov los ntawm kev sib xyaw qhuav, thiab tom qab ntawd ntxiv dej kom yaj.
Post lub sij hawm: Feb-23-2023