Ductility and Flame Retardancy Enhancement of PVC by Nanostructured Fly Ash

Silicon ◽  
2016 ◽  
Vol 11 (5) ◽  
pp. 2241-2251 ◽  
Author(s):  
Akshata G. Patil ◽  
Arunjunairaj Mahendran ◽  
M. Selvakumar ◽  
S. Anandhan
Keyword(s):  
Fly Ash ◽  
Flame Retardancy ◽  
Nanostructured Fly Ash

Flame retardancy of polycarbonate enhanced by adding fly ash

2007 ◽  
Vol 18 (5) ◽  
pp. 386-391 ◽  
Author(s):  
Makoto Soyama ◽  
Kazuhiko Inoue ◽  
Masatoshi Iji
Keyword(s):  
Fly Ash ◽  
Flame Retardancy

scholarly journals Experimental Study on Coal Fly Ash-Based Gas-Sealing Coating Used for Coal Mine Roadway Walls

Coatings ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 863
Author(s):  
Huiping Song ◽  
Chunhui Liu ◽  
Fangbin Xue ◽  
Xuhui Wen ◽  
Fangqin Cheng
Keyword(s):  
Fly Ash ◽  
Flame Retardancy ◽  
Coal Mine ◽  
Coal Fly Ash ◽  
Coal Industry ◽  
Gas Emission ◽  
Drying Time ◽  
Mine Roadway ◽  
Air Tightness ◽  
Sealing Coating

Gas-sealing coatings on coal mine roadway walls can effectively repress gas emission and are of importance to the safe operation of coal mining. In this study, the performance of coal fly ash (CFA)-based gas-sealing coatings was investigated, including the aspects of drying time, air tightness, impermeability, flame retardancy and antistatic properties. The results show that coating No. 25 with 60 g ultrafine CFA and 50 g emulsion (curing at 22 °C) had the best air tightness, with a permeability coefficient of 2.95 × 10−13 cm2/(s·Pa). The data obtained through the self-developed air tightness test device agreed well with the detection results of the gas permeameter, thus verifying the accuracy and reliability of the device. The impermeability, flame retardancy and antistatic properties of coating No. 25 conformed the requirements of voluntary national standards GB/T 23445-2009 and coal industry standard MT113-1995, respectively. The CFA-based gas-sealing coating in the pilot test reduced the gas emission intensity by 40%–50%. It could have wide applications in coal mine roadway walls.

scholarly journals Study on Synergies of Fly Ash with Multiwall Carbon Nanotubes in Manufacturing Fire Retardant Epoxy Nanocomposite

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Tuan Anh Nguyen ◽  
Quang Tung Nguyen
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Fly Ash ◽  
Flame Retardancy ◽  
Multiwall Carbon Nanotubes ◽  
Fire Retardant ◽  
Multiwalled Carbon ◽  
The Matrix ◽  
Fire Retardant Properties ◽  
Flame Retardant Properties

In this study, fly ash (FA) and multiwalled carbon nanotubes (MWCNTs) were used to make environmentally friendly nanocomposites, which have high fire retardant properties and high mechanical properties. Industrial waste such as fly ash has become a major concern during the treatment of environmental pollution. MWCNTs were used in this experiment to enhance the flame retardant properties and mechanical properties of materials with fly ash additives. MWCNTs content (0.03, 0.04, and 0.05 wt.%) and fly ash content (30, 40, and 50 wt.%) were studied for three different levels. The flame retardancy of the material is significantly improved by the addition of fly ash/MWCNTs at different rates, especially at 0.04 wt. % MWCNTs and 40 wt. % fly ash with LOI at 26.8%. Regarding mechanical properties, tensile strength increases as fly ash/MWCNTs increase, up to a critical point. On the other hand, the compressive strength of composite increases continuously as fly ash/MWCNTs increase. Scanning electron microscopy (SEM) was used to observe the morphology of fly ash and MWCNTs as well as its distribution in the matrix. This will help analyze the influence of the effectiveness of the combination of fly ash and MWCNTs to the flame retardancy and mechanical properties of fly ash/MWCNTs/epoxy nanocomposites.

scholarly journals Study on Fire Resistance Ability and Mechanical Properties of Composites Based on Epikote 240 Epoxy Resin and Thermoelectric Fly Ash: An Ecofriendly Additive

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Tuan Anh Nguyen ◽  
Quang Tung Nguyen ◽  
Xuan Canh Nguyen ◽  
Van Hoan Nguyen
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Epoxy Resin ◽  
Flame Retardancy ◽  
Impact Resistance ◽  
Test Method ◽  
Chemical Treatments ◽  
Synthetic Materials ◽  
Resistance Decrease

In this study, fly ash was tested as a filler in epoxy with concentrations of 5, 10, and 20 wt.%. Fly ash particles were modified by chemical treatments (using NaOH and HCl) to enhance the compatibility and adhesion, making mechanical properties and flame retardancy of materials better. Flexural strength, tensile strength, and impact resistance decrease as fly ash content increases. The compressive strength is further increased by the addition of fly ash (compressive strength of the materials including 5, 10, 20 wt.% of fly ash modified with NaOH is 176.01, 189.90, and 197.07 MPa, respectively). The interface between fly ash and epoxy matrix plays an important role in determining the mechanical strength and flame retardancy of synthetic materials. The results of UL-94HB and LOI test method for composite materials including 20 wt.% fly ash (modified by NaOH) reached 13.45 mm/min and 22.4%, respectively. These results showed that fly ash is an efficient additive as a flame retardant which decreases the amounts of additives in products and improves their efficiency. Fly ash was also dispersed into epoxy resin to enhance its resistance to oxidation.

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