Nanometrología: Impacto en los sistemas de producción

Gómez, Estefanía Ruiz; Jaramillo, Luis Fernando Giraldo

doi:10.18359/rcin.1771

Cited by 2 publications

(1 citation statement)

References 50 publications

(58 reference statements)

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“…With scientific advancement in techniques and the prevailing need for sustainable development in countries, there is dynamism in the changes in the environment, there is a vertiginous growth in the market, and an accelerated speed of technological progress, quality requirements, among others, that propose challenges that guarantee a real boost in companies worldwide. That is why developments and innovations in various fields lead to improving the existing conditions for any type of engineering product [1].…”

Section: Introductionmentioning

confidence: 99%

Implementation of the process by slurry and concentrate of pigments in latex-type paint formulas. Challenges and opportunities for planning

Paricaguán¹,

Muñoz²,

Sáenz

2022

Revista UIS Ingenierías

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Changes in product production are limited by high costs in infrastructure, procedures, reformulations and / or substitution of raw materials. Therefore, it is necessary to develop and innovate technologies that minimize impacts, without damaging product quality standards. In paint formulations, the dispersion process is of vital importance, which is why this research evaluated the possibility of implementing the technique slurry and pigment concentrate in the traditional way of manufacturing latex-type paints of the premium line (satin and exterior), and partially eliminate the dispersion stage, maintaining the physicochemical characteristics according to Venezuelan COVENIN standards. For this, three types of slurries were used; I: Aqueous dispersion of calcium carbonate (CaCO3), magnesium silicate (MgSiO3) and Kaolin (Al2Si2O5 (OH)4), II: Aqueous dispersion of CaCO3, III: Aqueous dispersion of CaCO3 and Kaolin. Likewise, in the pigment concentrates, two types of aqueous dispersion of titanium dioxide (TiO2) of medium and high dispersibility were used. As a result, there were no significant variations in terms of the quality characteristics of the paints obtained through the process by slurry and pigment concentrate with respect to the traditional manufacturing process. In addition, a reduction of 102 minutes was achieved on the global manufacturing time, since the previous dispersion of the pigments and extenders present in the pigment concentrates and slurries was used, thus eliminating one of the four stages of the manufacturing process of the lines (scattering stage). With the use of slurries and pigment concentrates, it was possible to increase productivity by 31.20 %, becoming an alternative for paint manufacturers, without investing in new equipment.

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Section: Introductionmentioning

confidence: 99%

Implementation of the process by slurry and concentrate of pigments in latex-type paint formulas. Challenges and opportunities for planning

Paricaguán¹,

Muñoz²,

Sáenz

2022

Revista UIS Ingenierías

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Low-cost microwave reactor for green synthesis of nanomaterials

2020

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Introduction: This contribution is about a low-cost microwave reactor for green synthesis of nanomaterials. The paper reflects research results achieved at the NanoFab group of the Universidad Militar Nueva Granada, within the line of nanophotonics, sensors and nanotechnology. Investigations and analyses were carried out during 2019. Problem: Conventional synthesis processes usually affect the environment and human health, due to contaminant reagents and generation of by-products. Objective: The aim of this research is the modification of a microwave oven that assists in the green synthesis of nanomaterials with potential applications in homeland security. Methodology: In this investigation, the modification of a domestic microwave was carried out. The implemented reactor features a heat exchange unit to reduce volatile elements, and a digital magnetic stirrer for local homogenization. Synthesis begins with a trisodium-citrate solution, continuously stirred at 37 °C. Next, the precursor is mixed with silver-nitrate for 2 minutes. Then, the mixture was treated for 20 minutes in the microwave reactor. Finally, the nanoparticles are recovered. Results: The homemade microwave reactor is suitable for producing nanoparticles. Particularly, the 20-minute microwave exposure time for the reactants results in a nanoparticle size between 80-90 nm. To probe reaction parameters, impedance spectroscopy analysis is performed. Results revealed that the resistance of the medium of silver nanoparticles is 2.5 ohms, while for sodium citrate and nitrate it is 8.8 and 11.8 ohms, respectively. Conclusion: It is demonstrated that the modified microwave reactor is suitable for nanomaterial production. Lower amounts of solvent are required during nanoparticle synthesis. Microwave synthesis allows for green nanomaterials production with a minor impact on the environment. Limitation: Homogeneous heating of reactants in a stationary microwave cavity is limited to waveguide design; in this case, to a multimodal-microwave waveguide. Originality: Low-cost reactor for nanomaterial production and greener synthesis.

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Nanometrología: Impacto en los sistemas de producción

Cited by 2 publications

References 50 publications

Implementation of the process by slurry and concentrate of pigments in latex-type paint formulas. Challenges and opportunities for planning

Implementation of the process by slurry and concentrate of pigments in latex-type paint formulas. Challenges and opportunities for planning

Low-cost microwave reactor for green synthesis of nanomaterials

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