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Related Concept Videos

Accelerated Curing of Concrete01:25

Accelerated Curing of Concrete

257
Accelerating concrete curing is achieved by applying heat and additional moisture. This process accelerates the hydration of the cement, resulting in an earlier strength gain in the concrete. Steam curing is a method wherein the concrete products are either transported through a chamber on a conveyor belt or encased in plastic, allowing steam at atmospheric pressure to circulate freely around them. This process begins with a phase of moist curing that typically lasts between 3 to 5 hours, after...
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Curing of Concrete01:20

Curing of Concrete

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The hydration of cement takes place within the water-filled capillary pores. However, environmental elements can disrupt this process by evaporating water from the concrete surfaces. Sealed concrete with a water-cement ratio below 0.5 experiences self-desiccation, leading to water loss. The water loss in concrete is mitigated by curing. This technique involves keeping the concrete saturated to maintain the necessary temperature and moisture conditions, to optimally fill the spaces in the cement...
167

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Environmentally Sustainable Functionalized WS2 Nanoparticles as Curing Promoters and Interface Modifiers in Epoxy

Lyazzat Tastanova1, Amirbek Bekeshev2, Sultan Nurlybay1

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Summary

Surface functionalization of tungsten disulfide (WS2) nanoparticles with aminoacetic acid enhances epoxy nanocomposite properties. This sustainable approach improves dispersion, accelerates curing, and boosts mechanical strength for advanced materials.

Keywords:
aminoacetic acidepoxy resinfunctionalizationgreen nanofillersinterfacial adhesionmodificationnanocompositetungsten disulfide

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Nanotechnology

Background:

  • Tungsten disulfide (WS2) nanoparticles offer potential for enhancing epoxy nanocomposites.
  • Surface modification is crucial for improving nanoparticle dispersion and interfacial adhesion in polymer matrices.
  • Aminoacetic acid (glycine) presents a non-toxic, bio-based option for sustainable nanofiller functionalization.

Purpose of the Study:

  • To investigate the impact of aminoacetic acid functionalization on WS2 nanoparticles.
  • To evaluate the effects on the structure, curing, and mechanical performance of epoxy nanocomposites.
  • To explore a sustainable method for creating advanced nanofillers.

Main Methods:

  • Surface functionalization of WS2 nanoparticles with aminoacetic acid.
  • Characterization using FTIR, EDS, and XRD to confirm functionalization.
  • Analysis of curing behavior (onset temperature, enthalpy) and mechanical properties (flexural, tensile, impact).
  • Microstructural examination using SEM.

Main Results:

  • Functionalization increased surface polarity and affinity, leading to uniform WS2 dispersion.
  • Curing onset temperature decreased from 51 °C to 43 °C; polymerization enthalpy increased from 566 J/g to 639 J/g.
  • SEM revealed tortuous crack paths and plastic deformation, indicating enhanced fracture resistance.
  • Significant improvements in flexural strength, tensile strength, modulus, and impact toughness were observed.

Conclusions:

  • Aminoacetic acid-modified WS2 nanoparticles act as efficient nanofillers in epoxy composites.
  • The functionalization enhances interfacial adhesion, structural uniformity, and accelerates curing.
  • This study demonstrates a sustainable pathway for developing high-performance epoxy nanocomposites using modified 2D nanofillers.