Abstract
Carboxymethylated lignin (CML) as a water-soluble lignin derivative is a multipurpose adsorbent and dispersant. In this article, the aggregation and adsorption behaviors of CML have been investigated in aqueous solution using fluorescence spectroscopy, dynamic light scattering, and a quartz crystal microbalance combined with dissipation monitoring techniques. It was found that CML forms aggregates when its concentration exceeds the critical aggregation concentration (CAC). The CAC of CML1 with a carboxylic (COOH) group content of 2.8 mmol g-1 was 0.022 g l-1, and that of CML2 with a COOH group content of 2.0 mmol g-1 was 0.026 g l-1. The adsorption behavior of CML on the gold surface was strongly dependent on the pH and ionic strength of the solution. At low pH and ionic strength, more CMLs were adsorbed at the gold/water interface, and the layers were rigid. The results could be used not only from the theoretical but also from the application point of view.
The authors are thankful for the financial support of the National Science Foundation for Distinguished Young Scholars of China (20925622), the National Natural Science Foundation of China (21006036, 20976064), the National Basic Research Program of China (2010)CB732205), and the Natural Science Foundation of Guangdong Province of China (8351064101000002), the Fundamental Research Funds for the Central Universities.
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©2013 by Walter de Gruyter Berlin Boston
Articles in the same Issue
- Masthead
- Masthead
- Original Articles
- A new lignan glycoside and phenolics from the branch wood of Pinus banksiana Lambert
- Fragmentation mechanism of the phenylcoumaran-type lignin model compound by ToF-SIMS
- Enzymatic hydrolysis of loblolly pine: effects of cellulose crystallinity and delignification
- Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution
- The adsorption and dispersing mechanisms of sodium lignosulfonate on Al2O3 particles in aqueous solution
- Moisture-dependent orthotropic tension-compression asymmetry of wood
- Time-domain NMR study of the drying of hemicellulose extracted aspen (Populus tremuloides Michx.)
- Substitution of phenol in phenol-formaldehyde (PF) resins by wood tar for plywood adhesives
- Modification of Pinus sylvestris L. wood with quat- and amino-silicones of different chain lengths
- Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions
- Measuring the thermal properties of green wood by the transient plane source (TPS) technique
- Effect of short-chain silicones bearing different functional groups on the resistance of pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) against decay fungi
- Antimicrobial surfaces of quaternized poly[(2-dimethyl amino)ethyl methacrylate] grafted on wood via ARGET ATRP
- Cloning and characterization of a 2,3-oxidosqualene cyclase from Eleutherococcus trifoliatus
- Phylogenetic analysis of the genus Fusarium and their antifungal activity against wood-decay and sapstain fungi
- Meetings
- Meetings
Articles in the same Issue
- Masthead
- Masthead
- Original Articles
- A new lignan glycoside and phenolics from the branch wood of Pinus banksiana Lambert
- Fragmentation mechanism of the phenylcoumaran-type lignin model compound by ToF-SIMS
- Enzymatic hydrolysis of loblolly pine: effects of cellulose crystallinity and delignification
- Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution
- The adsorption and dispersing mechanisms of sodium lignosulfonate on Al2O3 particles in aqueous solution
- Moisture-dependent orthotropic tension-compression asymmetry of wood
- Time-domain NMR study of the drying of hemicellulose extracted aspen (Populus tremuloides Michx.)
- Substitution of phenol in phenol-formaldehyde (PF) resins by wood tar for plywood adhesives
- Modification of Pinus sylvestris L. wood with quat- and amino-silicones of different chain lengths
- Reducing copper leaching from treated wood by sol-gel derived TiO2 and SiO2 depositions
- Measuring the thermal properties of green wood by the transient plane source (TPS) technique
- Effect of short-chain silicones bearing different functional groups on the resistance of pine (Pinus sylvestris L.) and beech (Fagus sylvatica L.) against decay fungi
- Antimicrobial surfaces of quaternized poly[(2-dimethyl amino)ethyl methacrylate] grafted on wood via ARGET ATRP
- Cloning and characterization of a 2,3-oxidosqualene cyclase from Eleutherococcus trifoliatus
- Phylogenetic analysis of the genus Fusarium and their antifungal activity against wood-decay and sapstain fungi
- Meetings
- Meetings