scholarly journals Flame retardant epoxy/halloysite nanotubes nanocomposite coatings: Exploring low-concentration threshold for flammability compared to expandable graphite as superior fire retardant

2018 ◽  
Vol 119 ◽  
pp. 8-14 ◽  
Author(s):  
Henri Vahabi ◽  
Mohammad Reza Saeb ◽  
Krzysztof Formela ◽  
José-Marie Lopez Cuesta
Keyword(s):  
Flame Retardant ◽  
Fire Retardant ◽  
Halloysite Nanotubes ◽  
Nanocomposite Coatings ◽  
Expandable Graphite ◽  
Low Concentration ◽  
Concentration Threshold

A study on mechanical, thermal and flame retardant properties of epoxy/expandable graphite composites

2017 ◽  
Vol 46 (2) ◽  
pp. 131-138 ◽  
Author(s):  
Arezoo Mamani ◽  
Morteza Ebrahimi ◽  
Maryam Ataeefard
Keyword(s):  
Mechanical Properties ◽  
Flame Retardant ◽  
Oxygen Index ◽  
Morphological Structure ◽  
Fire Retardant ◽  
Expandable Graphite ◽  
Index Test ◽  
Initial Decomposition Temperature ◽  
Content Type ◽  
Fire Retardant Properties

Purpose The purpose of this paper is to investigate the effect of expandable graphite (EG) plates’ incorporation on the mechanical, thermal and fire-retardant properties of an epoxy–aliphatic amine system. In addition, the optimum amount of EG in epoxy/EG composites is determined to achieve the best thermal and mechanical properties at the same time. Design/methodology/approach The epoxy/EG composites were prepared by using (1-4) phr of EG. The morphological structure of epoxy/EG composites was studied by using scanning electron microscopy. The thermal, flame-retardant and mechanical properties of epoxy/EG composites were evaluated by using thermogravimetric analysis (TGA), oxygen index test and dynamic mechanical analysis and tensile and impact test, respectively. Findings TGA results showed that the incorporation of EG to the epoxy resin increased the initial decomposition temperature and residue weight of the composites. It was found that, with increasing EG concentration up to 4 phr, the oxygen index, glass transition temperature and Young’s modulus of epoxy/EG composites increased up to 60 per cent, 4.1°C and 50 per cent, respectively. On the other hand, the sample with 2 phr EG provided the maximum values of tensile strength, storage modulus, cross-linking density, ultimate tensile strain and impact strength. Practical implications Prepared epoxy/EG composites can be used as halogen-free flame-retardant composites. The proposed process for the preparation of the composites is simple and can easily be implicated in the industry. Originality/value To the best of the authors’ knowledge, there is no other publication that considers mechanical, thermal and fire-retardant properties of epoxy/EG composites in one paper. In this work, the optimum concentration of EG in epoxy/EG composites was determined, considering all these properties.

scholarly journals Flame retardancy effects between expandable graphite and halloysite nanotubes in silicone rubber foam

RSC Advances ◽  
2021 ◽  
Vol 11 (23) ◽  
pp. 13821-13831
Author(s):  
Qingtao Pang ◽  
Furu Kang ◽  
Jun Deng ◽  
Lei Lei ◽  
Jie Lu ◽  
...  
Keyword(s):  
Flame Retardant ◽  
Flame Retardancy ◽  
Silicone Rubber ◽  
Halloysite Nanotubes ◽  
Expandable Graphite ◽  
Flame Retardant Properties

The effect of expandable graphite (EG) and modified halloysite nanotubes (HNTs) on the flame retardant properties of silicone rubber foam (SiF) was studied in this paper.

Study on Properties of Expandable Graphite in Waterborne Fire Retardant Coating

2012 ◽  
Vol 174-177 ◽  
pp. 771-774 ◽  
Author(s):  
Hong Yan Lin ◽  
Chun Cai Wang
Keyword(s):  
Flame Retardant ◽  
Fire Retardant ◽  
Expandable Graphite ◽  
Acrylic Emulsion ◽  
Addition Amount

Influence of addition amount and granularity of expandable graphite on the facing waterborne silicone-acrylic emulsion fire retardant coating was investigated. The results show that the waterborne silicone-acrylic emulsion fire retardant coating adding expandable graphite can improve its flame retardant time. The coating gets the best flame retardant effect when the addition amount of expandable graphite is 4%(by mass). The smaller granularity of expandable graphite can be more effective for improving the fire retardant performance.

Effects of expandable graphite on char morphology and pyrolysis of epoxy based intumescent fire‐retardant coating

2021 ◽  
pp. 51206
Author(s):  
Sami Ullah ◽  
Faiz Ahmad ◽  
Abdullah G. Al‐Sehemi ◽  
Muhammad Rafi Raza ◽  
Mohammed Ali Assiri ◽  
...  
Keyword(s):  
Fire Retardant ◽  
Expandable Graphite

scholarly journals Effects of Graphene Nanoplatelets on Mechanical and Fire Performance of Flax Polypropylene Composites with Intumescent Flame Retardant

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 4094
Author(s):  
Imran Ali ◽  
Nam Kyeun Kim ◽  
Debes Bhattacharyya
Keyword(s):  
Flame Retardant ◽  
Decomposition Rate ◽  
Natural Fiber ◽  
Fire Retardant ◽  
Graphene Nanoplatelets ◽  
Intumescent Flame Retardant ◽  
Fume Hood ◽  
Fire Dynamics ◽  
Polypropylene Composites ◽  
Set Up

The integration of intumescent flame-retardant (IFR) additives in natural fiber-based polymer composites enhances the fire-retardant properties, but it generally has a detrimental effect on the mechanical properties, such as tensile and flexural strengths. In this work, the feasibility of graphene as a reinforcement additive and as an effective synergist for IFR-based flax-polypropylene (PP) composites was investigated. Noticeable improvements in tensile and flexural properties were achieved with the addition of graphene nanoplatelets (GNP) in the composites. Furthermore, better char-forming ability of GNP in combination with IFR was observed, suppressing HRR curves and thus, lowering the total heat release (THR). Thermogravimetric analysis (TGA) detected a reduction in the decomposition rate due to strong interfacial bonding between GNP and PP, whereas the maximum decomposition rate was observed to occur at a higher temperature. The saturation point for the IFR additive along with GNP has also been highlighted in this study. A safe and effective method of graphene encapsulation within PP using the fume-hood set-up was achieved. Finally, the effect of flame retardant on the flax–PP composite has been simulated using Fire Dynamics Simulator.

Sign in / Sign up

Export Citation Format

Share Document