Effect Of Carboxymethyl Cellulose Research Articles

Effect of carboxymethylcellulose on the electrophoresis of serum proteins on paper

Carboxymethylcellulose (CMC) was used to control electroosmosis during paper electrophoresis. Increasing the negative charge on the matrix with CMC reduced the adsorption of certain lipoproteins and negatively charged substances. Advantage of these effects was taken to study the appearance of α-lipoproteins in calf serum and to separate them from other components either with or without the use of surface-active agents. The further use of CMC in curtain separations is indicated.

STUDIES ON THE WET STRENGTH PAPER

By heat treatment papers coated with some water-soluble high polymers develop wet strength more markedly than in the uncoated paper.The most effective polymer is protein like gelatin or milk casein. The effect of carboxymethyl-cellulose or polyvinyl-alcohol rank next to protein. The reason why protein is most effective seems to be due to the stronger proton accepting power of the functional groups in a protein molecule, and the lower activation energy of adhesion. The latter may be attributed to its special character of the functional groups and molecular structure. Carboxymethyl-cellulose contains carboxyl groups with strong proton accepting power. Polyvinyl-alcohol possesses in addition to its polar hydroxyl groups rather high ability of molecular free rotation.It appears therefore that the high polymers, which forms hydrogen bond easily with cellulose fiber, are effective to increase the wet strength, i.e. a class of polymers having lower activation energy of adhesion. The high ability of molecular free rotation and non-existence of steric hindrance and strong proton accepting power of functional groups are also important factors.