title: Interaction between chitosan-based clay nanocomposites and cellulose in a chemical pulp suspension.
abstract: Quaternized chitosan/organic montmorillonite (QCS/OMMT) nanocomposites were synthesized under microwave irradiation. XRD and TEM analyses confirmed that QCS intercalated into the interlayer of OMMT and clay layers distributed uniformly in QCS matrix. QCS/OMMT nanocomposites were used as retention and drainage-aid agents in pulp suspension, during which the interface behavior of positively charged QCS/OMMT nanocomposites on negatively charged cellulosic substrate and CaCO3 substrate was investigated. With the addition of QCS/OMMT nanocomposites, the particle size of cellulosic substrate increased, while the beating degree and the total residual carbohydrate concentration decreased. The results indicated that QCS/OMMT nanocomposite made a difference in paper making process through the charge patch interaction. Moreover, QCS/OMMT nanocomposites had a strong interaction with CaCO3, which was significant in fiber fines retention and paper production. When the mass ratio of QCS to OMMT was 8:1, the QCS/OMMT nanocomposite demonstrated the strongest retention and drainage-aid effect.
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Minghua
authors.initials: M
authors.lastname: Lai
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Pai
authors.initials: P
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Huanbin
authors.initials: H
authors.lastname: Lin
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Yuqiong
authors.initials: Y
authors.lastname: Luo
authors.affiliation: School of Printing and Packaging, Wuhan University, Wuhan 430079, China.
authors.forename: Houbin
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China. Electronic address: xyw@scut.edu.cn.
authors.forename: Xiaoying
authors.initials: X
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
authors.forename: Runcang
authors.initials: R
authors.lastname: Sun
mesh_terms: D001546:Bentonite / Q000737:chemistry*; D002482:Cellulose / Q000737:chemistry*; D048271:Chitosan / Q000737:chemistry*; D053761:Nanocomposites / Q000737:chemistry*
chemical_list: D001546:Bentonite; D002482:Cellulose; D048271:Chitosan
keywords: CaCO(3); Cellulosic substrate; Interface behavior; Nanocomposite; Organic montmorillonite; Quaternized chitosan