Synthesis of a nano organo-silicon compound for building materials waterproofing, using heteropolyacids as a green and eco-friendly catalyst

Bamoharram, Fatemeh F.; Heravi, Majid M.; Saneinezhad, Sara; Ayati, Ali

doi:10.1016/j.porgcoat.2012.10.005

Cited by 21 publications

(9 citation statements)

References 18 publications

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“…Several researchers reported nanoparticles similar to 1D-SNF in structure, synthesis or superhydrophobic behaviour [102][103][104][105][106][107]. However, either the existence of one-dimensional particles is not discussed, no or ambiguous analytical data are provided or the true onedimensional character of the product remains unclear.…”

Section: Related Filamentous Structuresmentioning

confidence: 99%

One-dimensional silicone nanofilaments

Artus

Seeger

2014

Advances in Colloid and Interface Science

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A decade ago one-dimensional silicone nanofilaments (1D-SNF) such as fibres and wires were described for the first time. Since then, the exploration of 1D-SNF has led to remarkable advancements with respect to material science and surface science: one-, two-and three-dimensional nanostructures of silicone were unknown before. The discovery of silicone nanostructures marks a turning point in the research on the silicone material at the nanoscale. Coatings made of 1D-SNF are among the most superhydrophobic surfaces known today. They are free of fluorine, can be applied to a large range of technologically important materials and their properties can be modified chemically. This opens the way to many interesting applications such as water harvesting, superoleophobicity, separation of oil and water, patterned wettability and storage and manipulation of data on a surface. Because of their high surface area, coatings consisting of 1D-SNF are used for protein adsorption experiments and as carrier systems for catalytically active nanopartides. This paper reviews the current knowledge relating to the broad development of 1D-SNF technologies. Common preparation and coating techniques are presented along with a comparison and discussion of the published coating parameters to provide an insight on how these affect the topography of the 1D-SNF or coating. The proposed mechanisms of growth are presented, and their potentials and shortcomings are discussed. We introduce all explored applications and finally identify future prospects and potentials of 1D-SNF with respect to applications in material science and surface science.

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Section: Related Filamentous Structuresmentioning

confidence: 99%

One-dimensional silicone nanofilaments

Artus

Seeger

2014

Advances in Colloid and Interface Science

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“…This layer results in the formation of spherical droplets of water, which are not absorbed into the material. Since water does not penetrate into the structure, it cannot deposit undesirable salts into it, which can otherwise cause corrosion, cracking, and other problems [18,19,20]. The angle between the surface of the material and the droplet is called the contact angle and is defined as the angle formed by the intersection of the liquid-solid interface and liquidvapor interface.…”

Section: A Hydrophobisation Agentsmentioning

confidence: 99%

The Protection of Masonry Blocks with Using Hydrophobization Before Load Due to Increased Moisture

Novák¹,

Zach²

2018

Int. J. Adv. Sci. Eng. Inf. Technol.

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The Faculty of Civil Engineering (Brno University of Technology) has for several years been developing and researching the properties of modern building materials. One area of research is the development and modification of the properties of masonry elements, particularly masonry blocks that are able to withstand increased moisture loads. These masonry blocks can be used as protection in buildings in flood areas or buildings that may be prone to damage from natural disasters. Increased moisture is one of the most common problems encountered in building structures. Most problems concern moisture in liquid form, which can have significant effects on changing the properties of materials and structures. If the structure of brick blocks is changed by moisture in liquid form due to porosity and water absorption, thereby affecting load, it can reduce the service life of masonry blocks. This paper investigates the use of special silicone products on the surface layer of ceramic masonry elements. The application of these silicone agents forms a protective surface layer on masonry blocks, protecting them via hydrophobisation and the effects of increased humidity. Hydrophobisation reduces water absorption into masonry blocks and eliminates the negative effects of moisture on the properties of masonry blocks. Through hydrophobisation, masonry blocks can be extremely effective for use as preventive protection in case of failure or damage on the part of conventional waterproofing measures.

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“…They are exhibiting a large potential either in advanced applications such as biomedical, catalytic, separation, chemical sensing, microfabrication or in high-technology industries like electronics, sports equipment, aerospace, among others [1,2]. Currently, the application of nanoparticles for improving the concrete waterproofing is gathering the interest of the construction industry in permanent seeking of concrete releasing formulations with water protection ability [3].…”

Section: Introductionmentioning

confidence: 99%

A hydrophobic release agent containing SiO2-CH3 submicron-sized particles for waterproofing mortar structures

Izarra

Cubillo

Serrano

et al. 2019

Construction and Building Materials

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Hydrophobic release agents were developed from SiO2-CH3 submicron-sized particles containing hydrophilic and hydrophobic functional groups dispersed into a vegetable oil as support. The SiO2-CH3 submicron-sized particles were synthesized by changing the molar ratio between the precursors Tetraethyl orthosilicate (TEOS) and Methyltriethoxysilane (MTES) from 0.66 to 5 (MTEOS-0.66 to MTEOS-5), being the relative amount of SiO2-CH3 quantified by FTIR technique. Mortar specimens having hydrophobic properties were manufactured using 3 wt.% of the above SiO2-CH3 submicron-sized particles. Additionally, the concentration effect was studied by using MTEOS-0.66 within 3-10wt.%. The hydrophobic properties of the mortar specimens were checked by measuring the contact angle within water droplets and surface. The particle size increased with the MTES/TEOS molar ratio and according to the hydrophobic properties, the proper release agent must be synthesized by using MTEOS-2.5 dispersed into the vegetable oil and having a concentration of 3wt.%. This hydrophobic release agent led mortar surfaces with contact angles higher than 145º. Waterproofing and mechanical studies on concrete specimens allowed to conclude that this demoulding agent do not have a high 2 penetration depth but improved the concrete waterproofing properties, without depletion in the compressive strength.

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Synthesis of a nano organo-silicon compound for building materials waterproofing, using heteropolyacids as a green and eco-friendly catalyst

Cited by 21 publications

References 18 publications

One-dimensional silicone nanofilaments

One-dimensional silicone nanofilaments

The Protection of Masonry Blocks with Using Hydrophobization Before Load Due to Increased Moisture

A hydrophobic release agent containing SiO2-CH3 submicron-sized particles for waterproofing mortar structures

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