Synthesis, aggregation behavior of novel cationic silicone surfactants in aqueous solution and their application in metal extraction

Fang, Liying; Tan, Jinglin; Zheng, Yan; Ge, Yang; Yu, Jiangtao; Feng, Shengyu

doi:10.1016/j.molliq.2017.02.017

Cited by 32 publications

(17 citation statements)

References 46 publications

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“…It was shown that all obtained surfactants have a high surface activity and at the same time a low degree of counterion binding. In [ 121 ] pyridine- ( Figure 6 b) and piperidine-based ( Figure 6 c) silicone surfactants were synthesized and their properties were investigated. The effect of inorganic salts (NaCl, NaBr, NaI, Na 2 SO 4 ) on aggregation of these surfactants was studied.…”

Section: Self-assembly Of Amphiphilic Compoundsmentioning

confidence: 99%

Self-Assembly of Amphiphilic Compounds as a Versatile Tool for Construction of Nanoscale Drug Carriers

Kashapov

Gaynanova

Gabdrakhmanov

et al. 2020

IJMS

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This review focuses on synthetic and natural amphiphilic systems prepared from straight-chain and macrocyclic compounds capable of self-assembly with the formation of nanoscale aggregates of different morphology and their application as drug carriers. Since numerous biological species (lipid membrane, bacterial cell wall, mucous membrane, corneal epithelium, biopolymers, e.g., proteins, nucleic acids) bear negatively charged fragments, much attention is paid to cationic carriers providing high affinity for encapsulated drugs to targeted cells. First part of the review is devoted to self-assembling and functional properties of surfactant systems, with special attention focusing on cationic amphiphiles, including those bearing natural or cleavable fragments. Further, lipid formulations, especially liposomes, are discussed in terms of their fabrication and application for intracellular drug delivery. This section highlights several features of these carriers, including noncovalent modification of lipid formulations by cationic surfactants, pH-responsive properties, endosomal escape, etc. Third part of the review deals with nanocarriers based on macrocyclic compounds, with such important characteristics as mucoadhesive properties emphasized. In this section, different combinations of cyclodextrin platform conjugated with polymers is considered as drug delivery systems with synergetic effect that improves solubility, targeting and biocompatibility of formulations.

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Section: Self-assembly Of Amphiphilic Compoundsmentioning

confidence: 99%

Self-Assembly of Amphiphilic Compounds as a Versatile Tool for Construction of Nanoscale Drug Carriers

Kashapov

Gaynanova

Gabdrakhmanov

et al. 2020

IJMS

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“…In its structure, M stands for trimethylsiloxane (CH 3 ) 3 SiO 1/2 -, D' means -O 1/2 Si(CH 3 )(R)O 1/2 -, as for R, it's the hydrophilic group connected to silicon by a propyl spacer. Because of the following characters of MD'M trisiloxane -the bond of Si-O can be attened on the surface of liquid, the low-energy methyl can be completely exposed to the air and distributed on the interface in a parachute structure, therefore, MD has the ability to abate the water surface tension to ~21 mN/m with an e cient method [22][23][24] . Compared with the traditional surfactant containing alkyl hydrophobic group, trisiloxane surfactant has more excellent properties, such as a lower surface tension, better spreading and wettability, good heat resistance and foaming performance, besides, with no toxic and side effects [25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

Parachute structure trisiloxane surfactant: synthesis and its use in reverse flotation of iron ore

Huang

Zhang

Burov

et al. 2021

Preprint

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No single element has exerted such a deep influence on social organization of mankind as iron. Magnetite is concentrated by froth flotation and used as a raw material to produce iron. However, the conventional surfactants used in the flotation process often lead to the weak collecting performance due to their analogous alkyl hydrophobic group. Here, we report a new trisiloxane surfactant N-(β-aminoethyl)-γ-aminopropyltrisiloxane (AAT) in magnetite flotation, which was compared with the traditional collector dodecylamine (DA). The flotation test results showed that AAT had excellent collecting ability and selectivity for quartz against magnetite. Magnetite concentrate with TFe recovery of 84.79%, TFe grade of 68.84% and SiO2 grade of 6.15% was obtained by using 150 g/t AAT. Density functional theory calculations suggested reactive site of AAT was cationic –CH2N+H3 group, and AAT showed a higher positive grouping Mulliken charge and chemical reactivity that may promote its flotation performance.

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“…Similar with hydrocarbon surfactants, silicone surfactants have both hydrophobic and hydrophilic groups. However, the silicone surfactants use permethylated siloxane groups as the hydrophobic groups grafted with one or more hydrophilic groups, − which have unique structures to give silicone surfactants good surface activity in both aqueous and nonaqueous solution. − The extraordinary qualities of silicone surfactants come from three main aspects: (i) silicone bonds are flexible, which allows the silicone molecules to pack more efficiently at different interfaces, (ii) the low cohesive energy of silicone compounds brings greater volume and cross-sectional area for the siloxane unit, and (iii) they have a low glass-transition temperature even for high molecular weight. Because of their distinctive properties, especially their high surface activities and wide application temperatures, silicone surfactants have drawn much attention in recent years. − …”

Section: Introductionmentioning

confidence: 99%

Synthesis and Solution Behavior of Sulfonate-Based Silicone Surfactants with Specific, Atomically Defined Hydrophobic Tails

2019

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A series of sulfonate-based silicone surfactants with different hydrophobic groups were synthesized. Two synthetic strategies are introduced to permit exquisite control over the hydrophobic moieties. Solution behavior of these surfactants was investigated by surface tensiometry, electrical conductivity, transmission electron microscopy, and dynamic light scattering. The results indicate that the aqueous behavior of the surfactants was distinctly influenced by the hydrophobic groups. Subtle distinctions in surfactant-related properties, which can be attributed to the three-dimensional molecular structures of the surfactants, can be seen for compounds with different hydrophobic moieties. Contact angle results of these surfactants indicate that they have super dispersal ability with the potential value in agriculture.

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Synthesis, aggregation behavior of novel cationic silicone surfactants in aqueous solution and their application in metal extraction

Cited by 32 publications

References 46 publications

Self-Assembly of Amphiphilic Compounds as a Versatile Tool for Construction of Nanoscale Drug Carriers

Self-Assembly of Amphiphilic Compounds as a Versatile Tool for Construction of Nanoscale Drug Carriers

Parachute structure trisiloxane surfactant: synthesis and its use in reverse flotation of iron ore

Synthesis and Solution Behavior of Sulfonate-Based Silicone Surfactants with Specific, Atomically Defined Hydrophobic Tails

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