Synthesis of mesoporous silica@Co-Al layered double hydroxide spheres: layer-by-layer method and their effects on the flame retardancy of epoxy resins

Posted on July 27, 2014 by Henri VAHABI

This  paper wes published in ACS Appl. Mater. Interfaces, July 25, 2014.

Hierarchical mesoporous silica@Co-Al layered double hydroxide (m-SiO2@Co-Al LDH) spheres were prepared through a layer by layer assembly process, in order to integrate their excellent physical and chemical functionalities. TEM results depicted that, due to the electrostatic potential difference between m-SiO2 and Co-Al LDH, the synthetic m-SiO2@Co-Al LDH hybrids exhibited that m-SiO2 spheres were packaged by the Co-Al LDH nanosheets. Subsequently, the m-SiO2@Co-Al LDH spheres were incorporated into epoxy resin (EP) to prepare specimens for investigation of their flame-retardant performance. Cone results indicated that m-SiO2@Co-Al LDH incorporated obviously improved fire retardant of EP. A plausible mechanism of fire retardant was hypothesized based on the analyses of thermal conductivity, char residues and pyrolysis fragments. Labyrinth effect of m-SiO2 and formation of graphitized carbon char catalyzed by Co-Al LDH play pivotal roles in the flame retardance enhancement.

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Sustainable Flame Retardant Technical Textile from Recycled Polyester (SUPERTEX)

Posted on July 13, 2014 by Henri VAHABI

The textile industry represents and important source of income and employment in Europe:

in 2005 the EU textile and clothing industry counted 155,000 enterprises employing more than 2.2 million people. Most of the production steps involved in the textile chain are not sustainable processes since they are chemicals consuming processes – such as finishing processes – and they are responsible for the production of large amount of waste, either wastewater and landfill waste. SUPERTEX project is aimed at demonstrating that a secondary raw material such as recycled Polyester (RPET) can be exploited within the Textile Industry for the fabrication of environmentally sustainable, high added value Technical Textile products.

Main objectives are: demonstration of the transferability of the production processes for PET multifilament yarns (MY) to RPET and recycled PET-polyolefin blends from post-industrial and post-consumer waste; addition of new functionalities (fire resistance) to the RPET-based MY; first application of RPET-based MY in the fabrication of textile structures for Mobiltech and Hometech markets.

Benefits

A wide usage of a waste materials, such as PET for the production of multifilament yarns, mainly applied in the Technical Textile sector.

Results

  • Demonstration of the transferability of the production processes for PET multifilament yarns (MY) to RPET and recycled PET-polyolefin blends from post-industrial and post-consumer waste. A marketable price in the range 2.0 – 3.0 €/kg is expected
  • A production technology for a range of textile materials based on RPET MY with different fineness, mechanical and functional properties, and performance comparable or better than conventional products from virgin polymer
  • Production of Flame Retardant (FR) textile by using safer products then the conventional products (alternative to antimony and halogenated compounds will be used)
  • A significant impact of the RPET MY textile is expected both upstream (RPET feedstock global market) and downstream (Technical Textile market) through replacement of virgin PET and other polymers….Read more

Source: http://ec.europa.eu

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Effect of complex flame retardant on the thermal decomposition of natural fiber

Posted on July 8, 2014 by Henri VAHABI

Bioresoureces.com :

Natural fiber is a renewable resource characterized by its low cost and environmental friendliness. However, flame retardant properties are one of the biggest limitations for the preparation of composite materials that need to be improved. In this work, a novel complex flame retardant consisting of aluminum hydroxide (ALH) and decarbromine diphenyl oxide (PBDE) was proposed to inhibit the thermal decomposition… Read more: click here

Filed under: Flame Retardant | Comments Off on Effect of complex flame retardant on the thermal decomposition of natural fiber

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