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Related Concept Videos

Superplasticizers01:30

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Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
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Plasticizers01:31

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Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
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Polymers02:34

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The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the...
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Aqueous Droplets Used as Enzymatic Microreactors and Their Electromagnetic Actuation
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From polymer latexes to multifunctional liquid marbles.

Ana M Fernandes1, Daniele Mantione, Raquel Gracia

  • 1Joxe Mari Korta Center, POLYMAT, University of the Basque Country UPV/EHU , Avenida Tolosa 72, 20018 Donostia-San Sebastian, Spain.

ACS Applied Materials & Interfaces
|January 31, 2015
PubMed
Summary
This summary is machine-generated.

Researchers developed a simple method to create multifunctional liquid marbles and dry water with magnetic, fluorescent, and color properties. This accessible platform enables the preparation of stable, large liquid marbles with diverse functionalities for expanded applications.

Keywords:
cationic surfactantsemulsion polymerizationionic liquidsliquid marblespolymer latexes

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Area of Science:

  • Materials Science
  • Colloid and Surface Chemistry
  • Polymer Science

Background:

  • Liquid marbles (LMs) are droplets of liquid stabilized by a powder coating, offering unique properties for handling liquids.
  • Developing multifunctional LMs with properties like magnetism and fluorescence is crucial for advanced applications.
  • Existing methods for LM preparation can be complex or limited in scalability and functionality.

Purpose of the Study:

  • To present a simple and general method for preparing multifunctional liquid marbles and dry water.
  • To incorporate magnetic, color, and fluorescent properties into liquid marbles.
  • To explore the potential for creating larger and more stable liquid marbles.

Main Methods:

  • Synthesized hydrophobic polymer latexes (polystyrene and poly(benzyl methacrylate)) via emulsion polymerization.
  • Induced latex flocculation using an anion-exchange reaction with lithium bis(trifluoromethanesulfonyl)imide.
  • Prepared hydrophobic micronanoparticulated powders from flocculated latex, then used these powders to stabilize water droplets into liquid marbles.

Main Results:

  • Successfully prepared highly hydrophobic powders capable of stabilizing air/water interfaces for liquid marble formation.
  • Achieved the formation of very stable liquid marbles up to 2.5 mL, the largest reported size, using small polystyrene nanoparticles.
  • Incorporated fluorescent dyes and magnetic nanoparticles (iron oxide) into the polymer latex, yielding fluorescent and magnetically responsive liquid marbles.

Conclusions:

  • The developed method provides an accessible and versatile platform for creating multifunctional liquid marbles and dry water.
  • The incorporation of magnetic and fluorescent properties expands the potential applications of liquid marbles.
  • This approach facilitates the study of liquid marble structures and enhances their utility in various scientific fields.