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| Effect of Cationic Polymers on Flotation Deinking Efficiency of MOW |
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| DOI： |
| Key Words:cationic polymer; MOW; deinking; surface and colloid chemical |
| Fund Project:基金项目:陕西省教育厅基金项目（09JK677）；西安理工大学创新基金项目（104-210803）。 |
| Author Name | Affiliation | | 张效林1 | 1.西安理工大学印刷包装工程学院，陕西西安，710048 | | 韩 卿2 | 2.陕西科技大学造纸工程学院，陕西西安，710021 |
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| Abstract: |
| Interface and colloid characterisitics of MOW deinking pulp dispersion system were investigated. Effects of several cationic polymers (CPAM, PAC, CS) on the Zeta potential and surface tension of this pulp dispersion system under the conditions of optimal chemical deinking process were researched. At the same time, the relations between the surface and colloid characterisitic changes and flotation efficiency (brightness and residual ink particles content of the pulp) were studied. Changes of deinked pulp fibers morphology and ink particles distribution before and after changing colloidal environment were analyzed by scanning electron microscopy (SEM). The results showed that interface and colloid chemical properties can be changed by adding a small amount of cationic polymer into the deinking system.The appropriate interface and colloid at environment is conducive to the removal of ink particles.When Zeta potential is -14.0~-12.0 mV and the surface tension is 60.0 ~ 63.0 mN/m, the brightness and ink removal efficiency of MOW deinking pulp are improved compared to the optimal conventional chemical deinking by flotation.SEM images indicated that the fiber surface becomes clearer after adding a small amount of polymers to maintain the appropriate interface and colloid chemical conditions,and the small ink particles, fines and other impurities content are also reduced. |
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