Journal of Korea Technical Association of The Pulp and Paper Industry (펄프종이기술)

Korea Technical Association of the Pulp and Paper Industry (한국펄프종이공학회)
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Polymer Adsorption and fiber Dispersion Stability of a Paper Stock Colloidal Suspension with a PAC-PAE Dual Polymer System

PAC-PAE 2중 고분자 내첨 지료의 고분자 흡착 및 교질 분산계의 안정성 연구

  • 윤성훈 (한국조페공사 기술연구소) ;
  • 김태영 (한국조페공사 기술연구소) ;
  • 김덕기 (한국조페공사 기술연구소) ;
  • 송병규 (한국조페공사 기술연구소)
  • Published : 2003.06.01
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Abstract

The adsorption of co-cationic dual polymer system was investigated as was the fiber dispersion stability of a paper stock suspension. Polyaluminum chloride(PAC) and polyamidoamine epichlorohy-drin(PAE) polymers were used as wet-end additives. The adsorbed amounts of PAE polymer in a wet stock were measured by using polyelectrolytic PCD titration. The sheet forming experiments were carried out in a standard handsheet machine. Fiber dispersion stability and relative retention were evaluated in terms of M/K non-uniformity index and sheet basis weight, respectively. The PAE polymer adsorption of Langmuir-isothermal type decreased with increasing PAC addition level. The combination of the two cationic polymers presumably exerts a site-blocking effect by the low molecular weight PAC which gives a partial charge neutralization at a minimum level of addition. From a thermodynamic view point of PAE adsorption, an increase in adsorption entropy and a decrease in train number suggests that the PAR polymer has an extended conformation structure that potentially leads to an enhancement of the fiber dispersion stability. This conclusion is supported by handsheet experiments that examined the PAC-PAE dual polymer effects on the sheet formation and retention.

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References

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