Development of lignin-based polycarboxylates as a plasticizer
Plasticizers, such as lignosulfonate (LS) or polycarboxylate ether (PCE), have been used to reduce the amount of added water in cement paste, which is advantageous because water reduces the strength of hardened cement (Plank et al. 2010; Huang et al. 2018).
Production and Application of Lignosulfonates and Sulfonated
The lignosulfonates produced through this method are soluble over a broad pH range, whereas commercial lignosulfonates have limited solubility at low-pH levels. 72 The improved solubility is due to an increased amount of bound sulfonic acid groups on the structure of the lignosulfonates.
Superplasticizer
Superplasticizers ( SPs ), also known as high range water reducers, are additives used in making high strength concrete. Plasticizers are chemical compounds that enable the production of concrete with approximately 15% less water content. Superplasticizers allow reduction in water content by 30% or more.
Superplasticizer - an overview | ScienceDirect Topics
Lignosulfonate, sulfonated naphthalene condensate or sulfonated melamine or polycarboxylate ethers are commercially available superplasticisers that should be effective for rammed earth materials. Due to the variation of natural soil components from place to place, a test for the compatibility and effectiveness for local rammed earth soil
Lignosulfonates
Lignosulfonates are also used for the production of plasterboard to reduce the amount of water required to make the stucco flow and form the layer between two sheets of paper. The reduction in water content allows lower kiln temperatures to dry the plasterboard, saving energy.
- Are lignosulfonates a sustainable superplasticizer?
- Lignosulfonates are promising materials for the production of sustainable superplasticizers. Chemical functionalities of lignosulfonates offer a wide range of structural modifications. In concrete technology, superplasticizers (SPs) are commonly used to reduce water content in concrete admixtures.
- Why is lignosulfonate modified?
- modified lignosulfonate could therefore also be due to beneficial interactions with unreacted r eagents. Changing the molecular weight is also a type of chemical modification. A variety of processes ]. ]. Enzymatic modification of ]. The number of sulfonate groups remained unchanged, ]. These changes
- Can lignosulfonat be used as a biobased SP?
- In this context, lignosulfonat (LS), renewable byproducts of wood pulp production, holds tremendous potential for the synthesis of biobased SPs. The scope of this review is mainly focused on the reported modifications of LS since 2000 with a special attention to the applications of these modifications in the field of concrete industry.
- Can lignosulfonate be purified without adding co-surfactant?
- The authors claim ultra-low interfacial application without added co-surfactant. However, no purification step was presented and the only ]. The claimed e ff ect of the modified lignosulfonate could therefore also be due to beneficial interactions with unreacted r eagents. Changing the molecular weight is also a type of chemical modification.
- Does lignosulfonate concentration affect film strength?
- The film strength was studied in terms of lignosulfonate concentration. This reduction of the interfacial modulus at high salinity or high ]. could be induced by these. 3.6. Interactions with other Components lignosulfonates. Studying inter-species interactions is by all means not trivial, as there are often counteracting e ff ects.
- Do lignosulfonates adsorb on surfaces and interfaces?
- Due to their amphiphilic property, lignosulfonates can adsorb on surfaces and interfaces. was found to resemble the time-dependent adsorption most accurately. The mechanisms for dispersion (Pickering emulsion), and the formation of viscoelastic interface layers. Key advancements have been to deformation.
