Carboxymethyl lignin as stabilizing agent in aqueous ceramic suspensions

Cerrutti, Bianca M.; Souza, C. S. de; Castellan, Alain; Ruggiero, Reinaldo; Frollini, Elisabete

doi:10.1016/j.indcrop.2011.08.015

Cited by 86 publications

(50 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A similar work on the stabilization of ceramic particles using anionic polymeric dispersants, it was reported that the addition of poly acrylic acid and poly ethylene glycol improved the dispersion of ceramic particles in the suspension [54]. In addition, the produced carboxymethylated lignin may also be used as a dispersant in the mining industry (ore suspensions), pesticide formulations, ceramic suspensions and cement admixture [14,17,[55][56] …”

Section: Impacts Of Ph and Concentration On Solubilitymentioning

confidence: 91%

“…Sugarcane bagasse based lignin generated by an organosolv (ethanol) pulping process was carboxymethylated by treating with monochloroacetic acid in order to produce carboxymethylated lignin (CML), which could be used as a stabilizing agent in aqueous ceramic suspensions [14]. Da Silva modified lignin obtained from the acid hydrolysis of sugarcane bagasse to prepare CML, which was used as an adsorbent for the removal of brilliant RED 2BE from effluent of the textile industry [15].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Production of carboxymethylated lignin and its application as a dispersant

Konduri

Kong

Fatehi

2015

European Polymer Journal

110

View full text Add to dashboard Cite

Section: Impacts Of Ph and Concentration On Solubilitymentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Production of carboxymethylated lignin and its application as a dispersant

Konduri

Kong

Fatehi

2015

European Polymer Journal

110

View full text Add to dashboard Cite

“…The powder lignin was washed with water at 70°C for 30 min under mechanical stirring to remove residual sugars and impurities, filtered and dried at 105°C until constant weight [24]. The following commercially available reagents were used as received: 3-methacryloxy propyltrimethoxy-silane (MPTS, Sigma-Aldrich), benzoyl peroxide (BPO, Sigma-Aldrich), tetraethylorthosilicate (TEOS, Sigma-Aldrich), ethanol (Sigma-Aldrich), nitric acid (Sigma-Aldrich), and tetrahydrofuran (THF, Sigma-Aldrich).…”

Section: Methodsmentioning

confidence: 99%

Siloxane–PMMA hybrid anti-corrosion coatings reinforced by lignin

Harb

Cerrutti

Pulcinelli

et al. 2015

Surface and Coatings Technology

View full text Add to dashboard Cite

a b s t r a c t a r t i c l e i n f o Available online xxxx Keywords: Lignin Siloxane-PMMA hybrid Sol-gel process Anti-corrosion coatingsNovel organic-inorganic hybrid coatings prepared using siloxane-poly(methyl methacrylate) (PMMA) were synthesized using the sol-gel process, with incorporation of lignin to improve mechanical strength, thermal stability and hydrophobicity, while maintaining the high anti-corrosive protection of siloxane-PMMA coatings. Dispersion of lignin in the siloxane-PMMA hybrid was analyzed by optical microscopy. Structural, morphological and wettability analysis of the about 2.5 μm thick coatings, deposited on carbon steel by dip-coating, was performed by X-ray photoelectron spectroscopy, atomic force microscopy and contact angle measurements. Thermal stability was investigated by thermogravimetry and the mechanical properties were studied by microhardness and microscratch measurements. Electrochemical impedance spectroscopy was used to evaluate corrosion resistance in saline aqueous environments. All coatings showed good dispersion of lignin in the hybrid matrix and low surface roughness between 0.3 and 0.4 nm. Incorporation of lignin increased hydrophobicity, microhardness and scratch resistance, in addition to shifting thermal degradation events to higher temperatures. The electrochemical tests showed that the hybrids act as efficient diffusion barriers, with corrosion resistance in the range of 10 8 Ωcm 2 after exposure to 3.5% NaCl aqueous solution. The hybrid containing a intermediate lignin content of 0.10 wt.% presented the best result, exhibiting the most hydrophobic surface (87.9°water drop contact angle), the highest hardness value (31.5 HV), high scratch resistance (up to 80.7 mN) and elevated impedance modulus (10 8 Ωcm 2 ) after 50 days exposure.

show abstract

“…An optimal lignin management is part of this strategy. Acid lignin is, for example, generated as a by-product of bioethanol production using acid saccharification of woody biomass (Matsushita et al 2005 ;Da Silva et al 2011 ;Cerrutti et al 2012 ). There is a large amount alkali lignin (AL) available in the waste liquor of soda pulping .…”

Section: Introductionmentioning

confidence: 99%

Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution

Gan¹,

Zhou²,

Yang³

et al. 2012

Holzforschung

View full text Add to dashboard Cite

Carboxymethylated lignin (CML) as a watersoluble 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.

show abstract

Carboxymethyl lignin as stabilizing agent in aqueous ceramic suspensions

Cited by 86 publications

References 33 publications

Production of carboxymethylated lignin and its application as a dispersant

Production of carboxymethylated lignin and its application as a dispersant

Siloxane–PMMA hybrid anti-corrosion coatings reinforced by lignin

Aggregation and adsorption behaviors of carboxymethylated lignin (CML) in aqueous solution

Contact Info

Product

Resources

About