scispace - formally typeset
Search or ask a question

What are surfactants Bob Aveyard? 


Best insight from top research papers

Surfactants, as discussed by Sharma, Jurado et al., Polarz et al., and Ivanković et al., are a diverse group of chemical compounds that have a wide range of applications. They are amphiphilic in nature, with both hydrophilic and hydrophobic groups. Surfactants can be classified into different types based on the charges of their polar head parts, such as anionic, cationic, nonionic, and zwitterionic. They have properties like solubility, detergency, emulsifying, dispersing, and wetting. Surfactants are used in various industries, including food preparation and processing, cellular membranes, detergents, and emulsification agents. They can self-assemble into micelles, vesicles, or lyotropic liquid crystals. Researchers are also exploring the development of next-generation surfactants with catalytically active heads and surfactants that can change their properties based on external triggers. Surfactants can have toxic effects on aquatic organisms, but most are readily biodegradable and their levels in the environment are usually below toxicity limits. Future studies are needed to replace highly toxic and non-biodegradable surfactants with more environmentally friendly alternatives.

Answers from top 5 papers

More filters
Papers (5)Insight
Open accessBook ChapterDOI
14 Jun 2013
26 Citations
The provided paper does not mention anything about "Bob Aveyard" or provide any information about surfactants related to him.
Open accessJournal ArticleDOI
Tomislav Ivanković, Jasna Hrenović 
334 Citations
The provided paper does not mention anything about "Bob Aveyard" or surfactants related to Bob Aveyard. The paper is about surfactants in the environment, their use in detergents and cleaning products, their discharge into sewage systems and surface waters, and their toxic effects on aquatic organisms.
Open accessJournal ArticleDOI
38 Citations
The provided paper does not mention anything about surfactants by Bob Aveyard.
The paper does not mention anything about "Bob Aveyard" or any specific person related to surfactants. The paper discusses the basics and versatility of surfactants in food industries.
Surfactants are mentioned in the paper, but the specific definition or explanation of surfactants by Bob Aveyard is not provided.

Related Questions

What are bio-based surfactants used in bitumen emulsions?5 answersBio-based surfactants used in bitumen emulsions include biopolymers, native nanoparticles, nanoparticles modified to be more hydrophobic, bio-based polymers B1 and B2, and lignins derived from kraft pulping and bioethanol industries. These surfactants are employed to stabilize bitumen-in-water emulsions with varying bitumen contents, ranging from 50% to 60%. The surfactants are crucial for emulsion preparation, affecting properties like droplet size distribution, stability over time, and interaction with aggregates in asphalt mixes. Studies have shown that these bio-based surfactants offer promising results in terms of emulsion stability and performance in cold mix asphalt applications, demonstrating potential for sustainable approaches in the asphalt industry.
How do surfactants affect the chemical enhanced oil recovery process?4 answersSurfactants play a crucial role in the chemical enhanced oil recovery (EOR) process. They are used to lower the interfacial tension (IFT) between oil and water, alter the wettability of the rock surface, and emulsify trapped oil. Different types of surfactants have been studied for their effectiveness in EOR. Cetyl trimethyl ammonium bromide (CTAB) has been found to inhibit clay swelling and prevent permeability reduction in sandstone reservoirs. Natural surfactants derived from plants have also been investigated as an alternative to chemical surfactants, with promising results in reducing IFT and improving oil recovery. Synergistic effects of nonionic surfactants have been observed, leading to ultra-low IFT and wettability alteration, resulting in additional oil recovery. A new superactive surfactant has shown high stability, low interfacial tension, and significant wettability alteration, making it a potential agent for enhancing oil recovery from carbonate and sandstone formations. The dominant EOR mechanisms of different surfactants have been studied, with emulsification being a key mechanism for improving sweep volume and overall recovery.
What are the surfactant micelles?4 answersSurfactant micelles are self-assembled structures formed by amphiphilic molecules in liquid solutions. These micelles have unique shapes that can be altered by various factors such as temperature, pH, or salinity. They can be elongated and flexible, forming worm-like micelles that are of special interest in research and technology. Surfactant micelles can also exhibit aggregation-induced emission (AIE) properties, leading to enhanced fluorescence in the aggregated state. The self-assembly of surfactant molecules into micelles is driven by noncovalent interactions, resulting in spherical structures that can pack into three-dimensional periodic arrays. The intermicellar interactions in surfactant micelle solutions can be influenced by the mixing of different types of surfactants, leading to the formation of mixed micelles with variable surface charges. Overall, surfactant micelles are versatile structures with a wide range of applications in fields such as rheology, imaging, drug delivery, and catalysis.
What are the surfactants used in Alumina sol-gel process?5 answersThe surfactants used in the sol-gel process for alumina synthesis include Cetyl Trimethyl Ammonium Bromide (CTAB), dodecyl dimethyl amino oxide (Genaminox LA,GLA) alkyl hydroxyethyl dimethyl ammonium chloride (HY, R = 12–14), 1/3-benzened disoulfonic acid disodium salt (SDBS), and Span 80.
What are the harmful effects of surfactants?5 answersSurfactants can have harmful effects on the environment and organisms. They can be discharged into the environment through various means and may cause toxic effects in plants and animals. Surfactants can interact with biological structures like membranes, proteins, and enzymes, leading to biochemical effects on organisms. Certain surfactants, when present in high concentrations in soil, can act as agents to release toxic pollutants. The phytotoxicity of surfactants has been observed in orchid seedlings, with higher concentrations causing pronounced effects on growth and viability. The toxicity of surfactants can be influenced by environmental factors such as mixtures, hardness, temperature, and the presence of other substances like pesticides and metals. Further research is needed to understand the chronic toxicities of surfactants and their impact on ecological risk.
Why surfactant one of effective method for oil spill?5 answersSurfactants are an effective method for oil spill remediation due to their ability to reduce the surface tension of water and disperse oil. By reducing the surface tension, surfactants can reverse the spreading of oil and cause it to retract away from the spill control boom, making it easier to remove mechanically. Additionally, surfactants can be used to contain spilled oil more efficiently during or after the placement of booms, reducing the areal coverage of the spill. Surfactants loaded onto halloysite clay nanotubes have been found to be effective in crude oil spill remediation, with high dispersion effectiveness achieved using ternary food grade surfactants. The use of biodegradable detergents as surfactants has also been proposed for dispersing oil spills. Overall, surfactants offer a promising solution for addressing oil spills by facilitating the containment, retraction, and dispersion of spilled oil.