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Effect of Amphoteric Polyacrylamide on Wet End System
  
DOI：10.11980/j.issn.0254-508X.2018.06.002
Key Words:amphoteric polyacrylamide  newsprint  drainage property  wet end system
Fund Project:广州市科技计划项目（项目编号：201607020025）。
Author NameAffiliation
SI Jing-hang State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
LIANG Jia-li State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
ZHOU Xue-song* State Key Lab of Pulp and Paper Engineering， South China University of Technology，Guangzhou， Guangdong Province， 510640 
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Abstract:Deinked pulp was used as raw material in this study. The effects of AmPAM dosage on drainage property of deinked pulp were investigated. Besides， drainage and retention properties were characterized by dynamic drainage jar（DDJ）， UV-vis spectrophotometry and ash content. The result showed that the Zeta potential of pulp reached peak value when AmPAM dosage was 2.5%～3.0%. Zeta potential was not significantly affected by the change of pH value. After adding 0.30% AmPAM， the 30 seconds drainage was increased， at the same time， the first pass retention（FPR） and filler retention were improved by 70.0% and 48.6%， respectively．
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