典型文献
Dispersive Ability of Carboxylated Cellulose Nanofibrils for Aqueous Monolayer Montmorillonite Dispersion:Influence of Na+ and Ca2+ Concentrations
文献摘要：
Carboxylated cellulose nanofibrils(CNFs)have emerged as effective green dispersants for monolayer montmorillonite(MMT)dispersions.However,their dispersion capability is sensitive to the metal ion concentration in aqueous solutions.Hence,this study investigated the effects of Na+and Ca2+concentrations on the dispersive ability of carboxylated CNFs for monolayer MMTs in water.Quartz crystal microbalance with dissipation monitoring(QCM-D)and atomic force microscopy(AFM)were utilized to explore the interfacial interactions between the carboxylated CNFs and monolayer MMTs under different Na+and Ca2+concentrations.When the concentration of Na+reached 0.1 mmol/L,the adhesion mass of carboxylated CNFs on MMT-coated wafer peaked at 24.47 mg/m2,higher than control sample(carboxylated CNF-dispersed monolayer MMT dispersion without metal ions,16.03 mg/m2).Moreover,the electrostatic shielding effect promoted a better dispersion of monolayer MMTs by carboxylated CNF dispersant.With a further increase in the Na+concentration,the surface charge of CNFs and MMTs would be reversed resulting from the improved electrostatic shielding effect,which weaken the dispersive ability of carboxylated CNFs.The addition of Ca2+reduced the dispersive ability of carboxylated CNFs for monolayer MMTs,because Ca2+required a lower concentration for the onset of charge reversal compared to Na+.This study provides interfacial scale insights into the influence of metal ion concentration on carboxylated CNF-dispersed monolayer MMT dispersions.It also provides a strategy to enhance the dispersive ability of carboxylated CNFs for monolayer MMTs.
文献关键词：
中图分类号：
作者姓名：
Kaihuang Chen;Chuan Sun;Guanhui Li;Jinhao Huang;Zhiqiang Fang;Xueqing Qiu
作者机构：
School of Chemistry and Chemical Engineering,South China University of Technology,Guangzhou,Guangdong Province,510640,China;State Key Laboratory of Pulp and Paper Engineering,South China University of Technology,Guangzhou,Guangdong Province,510640,China;School of Chemical Engineering and Light Industry,Guangdong Provincial Key Laboratory of Plant Resources Biorefinery,Guangdong University of Technology,Guangzhou,Guangdong Province,510006,China
文献出处：
引用格式：
[1]Kaihuang Chen;Chuan Sun;Guanhui Li;Jinhao Huang;Zhiqiang Fang;Xueqing Qiu-.Dispersive Ability of Carboxylated Cellulose Nanofibrils for Aqueous Monolayer Montmorillonite Dispersion:Influence of Na+ and Ca2+ Concentrations)[J].造纸与生物质材料（英文）,2022(01):28-37
A类：
Nanofibrils,Montmorillonite,dispersants,Ca2+concentrations,MMTs,Na+reached,Na+concentration,Ca2+reduced,Ca2+required
B类：
Dispersive,Ability,Carboxylated,Cellulose,Aqueous,Monolayer,Dispersion,Influence,Concentrations,cellulose,nanofibrils,CNFs,have,emerged,effective,green,monolayer,montmorillonite,dispersions,However,their,capability,sensitive,metal,aqueous,solutions,Hence,this,study,investigated,effects,Na+and,dispersive,carboxylated,water,Quartz,crystal,microbalance,dissipation,monitoring,QCM,atomic,force,microscopy,AFM,were,utilized,explore,interfacial,interactions,between,under,different,When,adhesion,mass,coated,wafer,peaked,higher,than,control,sample,dispersed,without,Moreover,electrostatic,shielding,promoted,better,by,With,further,increase,surface,charge,would,reversed,resulting,from,improved,which,weaken,addition,because,lower,onset,reversal,compared,This,provides,scale,insights,into,influence,It,also,strategy,enhance
AB值：
0.431939
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