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| Research on Factors Affecting the Efficiency of Chitosan-Bentonite Microparticle Retention System |
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| DOI： |
| Key Words:chitosan; bentonite; CPAM; microparticle retention and drainage system; paper performance |
| Fund Project:国家自然科学基金项目（No.31370583）。 |
| Author Name | Affiliation | | HU Qian | Jiangsu Key Laboratory of Pulping and Papermaking， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 | | JING Yi* | Jiangsu Key Laboratory of Pulping and Papermaking， Nanjing Forestry University， Nanjing， Jiangsu Province， 210037 |
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| Abstract: |
| As a bio-based environment-friendly chemical additive，chitosan combined with bentonite（Cs-Bn system）was evaluated as micro-particle retention and drainage aid. To explore the performance and the influence factors of the system， the effects of chitosan deacetylation degree （D.D.）and molecular weight （Mη）on the performance of Cs-Bn system were investigated.The efficiency of Cs-Bn system was compared with chitosan single system， cationic polyacrylamide（CPAM）-Bn system and Cs-CPAM-Bn system. The results indicated that chitosan with low Mη and medium D.D. had the greatest retention and drainage rate in Cs-Bn system， and the higher the D.D. or MV was， the better the paper formation and strength would be. The Cs-Bn system was clearly more efficient in retention, drainage and paper formation than chitosan single system， besides， it could solve the contradiction between high retention and poor formation caused by chitosan single system. Compared with CPAM-Bn system， the Cs-Bn system could improve the formation by 178.4% and strength by 71.1%. The Cs-CPAM-Bn system combined the advantages of Cs and CPAM to achieve higher retention， drainage and better formation． |
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