Application of surfactants in papermaking industry and future development trend of green surfactants

Wang, Tengfei; Chang, Dejun; Huang, Di; Liu, Zetong; Wu, Yukang; Liu, Hongling; Yuan, Haibo; Jiao, Yi

doi:10.1007/s00253-021-11602-6

Cited by 20 publications

(3 citation statements)

References 127 publications

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“…Surfactants are widely used as foaming agents, emulsifiers, wetting agents, solubilizers, and so forth. They have important applications in daily chemical manufacturing, food processing, oil field exploitation, fire protection, wastewater treatment, and so forth. − However, their excessive emission can change the physical and chemical properties of the soil and clog soil pores, affecting the absorption of heavy metals in the soil . Surfactants can also change the community structure of microorganisms, can inhibit the biological activity of plants and animals, and can even be harmful to human health. , Therefore, the treatment of surfactants in industrial and domestic wastewater is of great interest …”

Section: Introductionmentioning

confidence: 99%

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Xia

Cao

et al. 2023

Ind. Eng. Chem. Res.

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The study of surfactant adsorption behavior at the interface is particularly important to guide the treatment of wastewater containing surfactants and the application of surfactants. However, there are still many challenges to fully understand their interfacial adsorption behavior. In this work, the limitations of Gibbs' formula in describing interfacial adsorption were summarized. A new isothermal adsorption formula based on the thermodynamic equilibrium of the system when adsorption reaches equilibrium was developed. Through this approach, a quantitative description of interface adsorption can be realized. Thus, the relationship between surface concentration and surface tension can be further elucidated. Taking anionic surfactant sodium dodecyl sulfate as an example, the numerical curve of surface concentration (C s ) was obtained, and the C s was 1.486 mol/L at saturation. Molecular simulations were used to study the behavior of surfactant molecules near the interface and to study the properties of the solution surface phase. Based on the simulated data, the C s at saturation was calculated to be 1.480 mol/L, which validates the model result. In addition, to address the abnormal expansion of the simulated interface caused by surfactant adsorption, an algorithm for calculating the surface area of the fluctuating interface is established, and this algorithm realizes the convenient and accurate calculation of the interfacial area.

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Section: Introductionmentioning

confidence: 99%

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Xia

Cao

et al. 2023

Ind. Eng. Chem. Res.

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“…Among its many applications, SDS is used as a fat emulsifier and as an ingredient in cosmetics, pharmaceuticals, and toothpaste [48]. It is also used extensively in deinking recycled paper and in various other processes of paper production [49]. In aerobic and anaerobic environments, SDS readily biodegrades into simple, nontoxic components and does not persist in the environment [47].…”

Section: Resultsmentioning

confidence: 99%

Effect of Starch and Paperboard Reinforcing Structures on Insulative Fiber Foam Composites

Glenn,

Tonoli,

Silva

et al. 2024

Polymers

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Single-use plastic foams are used extensively as interior packaging to insulate and protect items during shipment but have come under increasing scrutiny due to the volume sent to landfills and their negative impact on the environment. Insulative compression molded cellulose fiber foams could be a viable alternative, but they do not have the mechanical strength of plastic foams. To address this issue, a novel approach was used that combined the insulative properties of cellulose fiber foams, a binder (starch), and three different reinforcing paperboard elements (angular, cylindrical, and grid) to make low-density foam composites with excellent mechanical strength. Compression molded foams and composites had a consistent thickness and a smooth, flat finish. Respirometry tests showed the fiber foams mineralized in the range of 37 to 49% over a 46 d testing period. All of the samples had relatively low density (Dd) and thermal conductivity (TC). The Dd of samples ranged from 33.1 to 64.9 kg/m3, and TC ranged from 0.039 to 0.049 W/mk. The addition of starch to the fiber foam (FF+S) and composites not only increased Dd, drying time (Td), and TC by an average of 18%, 55%, and 5.5%, respectively, but also dramatically increased the mechanical strength. The FF+S foam and paperboard composites had 240% and 350% higher average flexural strength (σfM) and modulus (Ef), respectively, than the FF-S composites. The FF-S grid composite and all the FF+S foam and composite samples had equal or higher σfM than EPS foam. Additionally, FF+S foam and paperboard composites had 187% and 354% higher average compression strength (CS) and modulus (Ec), respectively, than the FF-S foam and composites. All the paperboard composites for both FF+S and FF-S samples had comparable or higher CS, but only the FF+S cylinder and grid samples had greater toughness (Ωc) than EPS foam. Fiber foams and foam composites are compatible with existing paper recycling streams and show promise as a biodegradable, insulative alternative to EPS foam internal packaging.

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“…Foams are widely used in firefighting, daily chemical, mineral flotation, oil extraction, and other fields. − However, it is a thermodynamically unstable system, and the foaming capacity and stability are generally improved by adding surfactants . Surfactants, due to their unique amphiphilic structure, adsorb at the gas–liquid interface to hinder liquid film precipitation and foam agglomeration. , This causes a reduction in the interfacial generation energy and surface tension, which makes it easy for the surfactant solution to form foams under perturbation .…”

Section: Introductionmentioning

confidence: 99%

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

Cao,

Xia,

Zhao

et al. 2023

Ind. Eng. Chem. Res.

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In the application of foams in the industrial field, there are often high requirements for foaming ability and stability, but this brings greater pressure for defoaming. This paper discusses the evolution kinetics of aqueous foams stabilized by the anionic surfactant sodium dodecyl sulfate (SDS) under the influence of MgCl 2 . It is found that MgCl 2 has a dual effect on the performance of SDS foam, which is shown by the enhanced foaming ability and significantly improved stability but rapid defoaming when drained to a certain film thickness. This phenomenon not only increases efficiency in industrial applications but also facilitates recycling and defoaming. To clarify the mechanism behind this interesting phenomenon, we discuss the influence of MgCl 2 on bubbles, adsorption, film strength, disjoining pressure, surface tension, and rheological properties. The results show that the addition of MgCl 2 can significantly reduce the surface tension and interfacial formation energy and increase the adsorption of surfactant, film strength, and bulk phase viscosity. The size of the generated foam becomes smaller and more uniform. These factors together led to the enhancement of the stability of foam with the thicker liquid film. However, the addition of MgCl 2 can also have some detrimental effects on stability. For example, faster adsorption kinetics and higher surface strength lead to a weakening of the membrane repair capacity. Most importantly, when the liquid film is very thin, the surface adsorbed by SDS has a strong specific adsorption for Mg 2+ , which causes interfacial adhesion directly, leading to the instability of the thin liquid film. This paper provides theoretical guidance on the use of magnesium salts as additives, offering new ideas for combining high foam application performance and low defoaming difficulty.

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Application of surfactants in papermaking industry and future development trend of green surfactants

Cited by 20 publications

References 127 publications

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Effect of Starch and Paperboard Reinforcing Structures on Insulative Fiber Foam Composites

Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

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Application of surfactants in papermaking industry and future development trend of green surfactants

Cited by 20 publications

References 127 publications

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Retraction of “Quantitative Study of Gas–Liquid Interface Adsorption Based on Theoretical Modeling and Molecular Dynamics Simulation”

Effect of Starch and Paperboard Reinforcing Structures on Insulative Fiber Foam Composites

Study on the Dual Effects of MgCl2 on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate

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Product

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Study on the Dual Effects of MgCl₂ on the Characteristics of Foams Stabilized by Sodium Dodecyl Sulfate