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MECHANO-CHEMICAL MODIFICATION OF POLYSACCHARIDES |
Leader of the group: Lipatova
Irina M. |
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Padokhin Valeri A. Research associate, Institute of Solution Chemistry; Ph.D 1982, Institute of Solution Chemistry |
Staff: Yusova
Anna A. |
Although mechanochemistry is a well-developed sphere of science, the majority of the theoretical investigations are devoted to the activation of solid substances and polymers in mass. Water-polymer systems which are of special practical interest, have not been studied untl recently.
At the same time, hard-chain natural polymer hydrogels are dispersions with considerable particle anisotropy and demonstrate the ability of such systems to become highly deformed when placed in shear field. Consequently, the possibility exists of structural and mechano-catalysed modification of hydrogels.
Since 1997 , work at the Institute of Solution Chemistry includes:
the investigation of the properties of polysaccaride gels, exposed to the influence of high-speed shear deformations and cavitation;
bringing to light the regularities of gel modification caused by gel treatment in rotor-impulse apparata of different types.
Substantial changes in the structure of hydrogels of starch and several cellulose ethers have been confirmed experimentally. The regularities of radical formation , oxidation, and destruction, initiated by mechanical teatment of gels, are being studied. Improvements in the component compatibility in the compositions, which include polysaccharide, synthetic polymer, and water has been proved, as has the existence of interphase copolymer in certain specific conditions of mechanical activation of gels.
Hydrogels of starch and carboxymethylcellulose with improved technological properties have been tested in several textile plants as thickening and sizing agents. They will shortly be used in commercial production.
1. Lipatova I.M., Sedova I. L., Yermolajeva N.A., Padokhin V.A., Moryganov A.P. The influence of mechano-chemical treatment on the technological properties of starch size. Tekstilnaja khimija (Textile Chemistry), No 1 (3), (1993), P.26-28.
2. Lipatova I.M., Nuzhdina I.V., Padokhin V.A., Moryganov A.P. New thickening and sizing preparations made of mechanically modifyed starch. In: Bulletin of Moscow State Technological Academy, (1994), P. 107-111.
3. Lipatova I.M., Odintsova O.I., Padokhin V.A., Kozlova O.V., Makarova L.I. New thickening preparations made of mechano-chemically modifyed NaCMC. Tekstilnaja khimija (Textile Chemistry), No 2 (11), (1997), P.26-30.
4. Lipatova I.M., Padokhin V.A., Makarova L.I., Nikonova L.A., Yashkov Yu.K. Mechano-chemical technologies for producing modifyed starch thickeners. Tekstilnaja khimija (Textile Chemistry)- in print.
5. Kozlova O.V., Odintsova O.I., Padokhin V.A., Lipatova I.M. Composite thickeners with NaCMC and starch as basic components. Izvestija vuzov. Tekhnologija tekstilnoi promyshlennosti - in print .
6. Lipatova I.M., Sedova I.L., Yermolaeva N.A., Padokhin V.A., Moryganov A.P., Influence of mechanical treatment on the technological properties of starch size, In: Textile Chemistry - Theory, Technology, Equipment / Ed. A.P.Moryganov. - Nova Sci. Publishers, Inc., Commack, New York, (1997), P.265-272.