State Key Laboratory of Pulp & Paper Engineering, South China University of Technology, Guangzhou 510640, China.
School of Printing and Packaging, Wuhan University, Wuhan 430079, China.
Carbohydr Polym. 2016 Feb 10;137:375-381. doi: 10.1016/j.carbpol.2015.10.099. Epub 2015 Nov 10.
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.
季铵化壳聚糖/有机蒙脱土（QCS/OMMT）纳米复合材料在微波辐射下合成。XRD 和 TEM 分析证实 QCS 插层进入 OMMT 的层间，并且粘土层在 QCS 基体中均匀分布。QCS/OMMT 纳米复合材料被用作纸浆悬浮液中的保留和助滤剂，在此过程中研究了带正电荷的 QCS/OMMT 纳米复合材料对带负电荷的纤维素基质和 CaCO3 基质的界面行为。随着 QCS/OMMT 纳米复合材料的添加，纤维素基质的粒径增加，而打浆度和总残余碳水化合物浓度降低。结果表明，QCS/OMMT 纳米复合材料通过电荷斑块相互作用对造纸过程产生影响。此外，QCS/OMMT 纳米复合材料与 CaCO3 具有很强的相互作用，这对纤维细小物的保留和纸张生产非常重要。当 QCS 与 OMMT 的质量比为 8:1 时，QCS/OMMT 纳米复合材料表现出最强的保留和助滤效果。
