Sol Preparation
Sol Preparation - Related Videos
09:20
Microhoneycomb Monoliths Prepared by the Unidirectional Freeze-drying of Cellulose Nanofiber Based Sols: Method and Extensions
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Cited by 5 •
2018
Here, we present a general protocol to prepare a variety of microhoneycomb monoliths (MHMs) in which fluid can pass through with an extremely low pressure drop. MHMs obtained are expected to be used as filters, catalyst supports, flow-type electrodes, sensors and scaffolds for biomaterials.
10:44
A Guided Materials Screening Approach for Developing Quantitative Sol-gel Derived Protein Microarrays
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Cited by 1 •
2013
A guided material screening approach to develop sol-gel derived protein doped microarrays using an emerging pin-printing method of fabrication is described. This methodology is demonstrated through the development of acetylcholinesterase and multikinase microarrays, which are used for cost-effective small-molecule screening.
04:37
The Sol Braiding Method for Handling Thick Hair During Transcranial Magnetic Stimulation: An Address for Potential Bias in Brain Stimulation
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Cited by 3 •
2024
Hair type commonly seen in historically underrepresented minorities appears to interfere with transcranial magnetic stimulation (TMS). Here we describe a hair braiding method (The Sol Braiding Technique) that improves TMS.
03:00
Preparation of Epoxides
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2023
Overview Epoxides result from alkene oxidation, which can be achieved by a) air, b) peroxy acids, c) hypochlorous acids, and d) halohydrin cyclization. Epoxidation with Peroxy Acids Epoxidation of alkenes via oxidation with peroxy acids involves the conversion of a carbon–carbon double bond to an epoxide using the oxidizing agent meta-chloroperoxybenzoic acid, commonly known as MCPBA. Since the O–O bond of peroxy acids is very weak, the addition of electrophilic oxygen of peroxy acids to...
01:29
Preparation of Amides
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2023
Amides are synthesized by treating carboxylic acids with amines in the presence of dehydrating agents like dicyclohexylcarbodiimide (DCC). The DCC-promoted synthesis of amides begins with the protonation of DCC by carboxylic acid. The protonation makes it a better acceptor. Next, the addition of carboxylate to the protonated carbodiimide gives a reactive acylating agent. Subsequently, the amine acts as a nucleophile that attacks the acylating agent to form a tetrahedral intermediate. In the...
FAQs
One route reduces a bulk solid to finely divided particles and distributes them through a liquid. The other generates colloidal particles directly through a controlled chemical reaction, including hydrolysis, reduction, or precipitation. This distinction affects how particle formation is managed and helps chemists select a preparation strategy suited to the desired sol and its later use.
Particle size affects how readily dispersed solids settle, while surface charge influences interactions among neighboring particles. Solvent, pH, and temperature also modify the conditions under which particles remain distributed. Controlling these variables helps prevent rapid settling and supports the formation of a stable sol that can later develop into a gel or another structured material.
Simple dispersion relies on breaking a bulk material into smaller particles and distributing them in the liquid medium. Sol preparation may instead create the colloidal particles through hydrolysis, reduction, or precipitation. Because chemical generation controls particle formation during the process, it provides a distinct route from physical subdivision of an existing bulk solid.
Particle size, surface charge, solvent, pH, and temperature are central control variables. They influence whether the particles remain distributed or settle rapidly and can affect the sol's ability to form a gel or other structured material. Adjusting these conditions gives the preparation process control over stability and the resulting material's behavior.
A basic workflow begins by selecting either bulk-material dispersion or chemical generation through hydrolysis, reduction, or precipitation. The chosen route is then conducted while controlling the solvent, pH, temperature, particle size, and surface charge. The resulting material is evaluated for resistance to rapid settling and for its capacity to form a structured product.
Sol preparation supports investigations of colloidal behavior and the production of catalysts, pigments, coatings, ceramics, and advanced functional materials. The method is valuable because the prepared sol can remain distributed during processing and may subsequently form a gel or another structured material. Its applications therefore extend from fundamental chemistry to material fabrication.