Anionic cellulose

In Suopajarvi s work [38], dicarboxylic acid nanocellulose [DCC] flocculants were produced by nanofibrillation of periodate and chlorite-oxidized celluloses with a homogenizer. The flocculation performance levels of five such anionic nanocelluloses with variable charge densities were examined in the coagulation-flocculation treatment of municipal wastewater and the results compared with the performance of a commercial coagulant and a synthetic 

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Cellex D and other anionic celluloses are washed with 0.25M NaCl/0.25M NaOH solution, then twice with deionised water. This is followed with 0.25M NaCl and then washed with water until chloride-free. The Cellex is then equilibrated with the desired buffer as above. 

One of the difficulties of using starch as a surface size is that when surface-sized papers are recycled, the starch is readily solubilised into the aqueous system where it contributes to the nutritional pollution load of the effluent. This can be controlled to a large extent by introducing cationic groups into the starch molecule which bind strongly to the anionic cellulose in a similar manner to starches used as dry strength agents (Chapter 7). 

S-anions Cellulose ring-colorimetry Different spray reagents 0.2-1 Mg 245)... 

The flocculant based on cellulose can be generally classified into four major groups [i] cationic cellulose-based-flocculant, (ii) anionic cellulose-based flocculant [41], (Hi) amphoteric cellulose-based flocculant, (iv) nonionic cellulose-based flocculant [42] as follows ... 

A typical cellulose etherification involving Michael additiOTi of an activated C=C bond of acrylonitrile (AN) to a partially anionized cellulosic hydroxyls in an aqueous alkaline medium represented below was employed. 

It was seen that anionic surfactants interact with the positive charge of cationic polysaccharides even at concentrations well below the surfactant s cmc. There is a rapid increase in the viscosity of 1.0 wt% polyquaternium-10 solutions as the anionic surfactant begins to neutralize the charge on the cationic polymer (Fig. 26). As shown earlier (Fig. 22), this solution viscosity response is characteristic of the cationic HEC/anionic surfactant combination and does not appear to occur in the juxtaposed anionic cellulose/cationic surfactant combination. 

J. Trygg, E. Yildir, R. Kolakovic, N. Sandler, and P. Fardim, Anionic cellulose beads for drug encapsulation and release, Cellulose, 21,1945-1955, 2014. 

The second purification stop was similar to that used by Gregory and Tracy for the separation of gastrins I and II on anionic cellulose. We used an exchanger of stronger basicity... 

Figure 3. SEC chromatograms of the four PLCA (Figure 3 a) and PLCAI (Figure 3b) components obtained from the four corresponding PLL/PLCA and PLL/PLCAI PEC fractions. Gel and elution conditions anionic cellulose-based gel as the stationary phase and a 1 MNaCl and 0.15 Mphosphate buffer solution at pH =7.4 as the mobile phase.

CMC, anionic cellulose ether, is available in a variety of types based on particle size, DS, viscosity and hydration characteristics for different food applications. It is soluble in hot and cold water but insoluble in organic solvents. It basic function is to bind water or impart viscosity to the aqueous phase thereby stabilizing the other ingredients or preventing... 

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