Graphene/Polymer Composites: A New Class of Fire Retardant

2019 ◽  
pp. 151-180
Author(s):  
Xin Wang ◽  
Wenwen Guo
Keyword(s):  
Polymer Composites ◽  
Fire Retardant ◽  
New Class

scholarly journals Environmentally Friendly, High-Performance Fire Retardant Made from Cellulose and Graphite

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2400
Author(s):  
Leandra P. Santos ◽  
Douglas S. da Silva ◽  
Thais H. Morari ◽  
Fernando Galembeck
Keyword(s):  
High Performance ◽  
Raw Materials ◽  
Fire Retardant ◽  
Visual Observation ◽  
Flame Resistance ◽  
New Developments ◽  
New Class ◽  
New Material ◽  
Accredited Laboratory ◽  
Materials Used

Many materials and additives perform well as fire retardants and suppressants, but there is an ever-growing list of unfulfilled demands requiring new developments. This work explores the outstanding dispersant and adhesive performances of cellulose to create a new effective fire-retardant: exfoliated and reassembled graphite (ERG). This is a new 2D polyfunctional material formed by drying aqueous dispersions of graphite and cellulose on wood, canvas, and other lignocellulosic materials, thus producing adherent layers that reduce the damage caused by a flame to the substrates. Visual observation, thermal images and surface temperature measurements reveal fast heat transfer away from the flamed spots, suppressing flare formation. Pinewood coated with ERG underwent standard flame resistance tests in an accredited laboratory, reaching the highest possible class for combustible substrates. The fire-retardant performance of ERG derives from its thermal stability in air and from its ability to transfer heat to the environment, by conduction and radiation. This new material may thus lead a new class of flame-retardant coatings based on a hitherto unexplored mechanism for fire retardation and showing several technical advantages: the precursor dispersions are water-based, the raw materials used are commodities, and the production process can be performed on commonly used equipment with minimal waste.

A method to assess downward flame spread and dripping characteristics of fire-retardant polymer composites

2017 ◽  
Vol 42 (4) ◽  
pp. 347-357 ◽  
Author(s):  
Chuchu Wen ◽  
Jiyue Zhang ◽  
Yiannis A. Levendis ◽  
Michael A. Delichatsios
Keyword(s):  
Polymer Composites ◽  
Flame Spread ◽  
Fire Retardant ◽  
Downward Flame Spread

Transparent silica gel–PMMA composites

1989 ◽  
Vol 4 (4) ◽  
pp. 1018-1026 ◽  
Author(s):  
E. J. A. Pope ◽  
M. Asami ◽  
J. D. Mackenzie
Keyword(s):  
Compressive Strength ◽  
Refractive Index ◽  
Polymer Composites ◽  
Silica Gel ◽  
Vickers Hardness ◽  
Modulus Of Rupture ◽  
New Class ◽  
Abrasion Rate ◽  
Organic Monomer

Transparent silica gel–polymer composites have been prepared by the impregnation of porous gels with organic monomer and polymerization in situ. The relative amount of each phase was adjusted by varying the porosity of the silica gel prior to impregnation. These materials constitute a new class of transparent composites. Properties, such as density, refractive index, modulus of rupture, compressive strength, abrasion rate, and Vickers hardness, have been measured over the compositional range of 100% silica to 100% polymethyl methacrylate (PMMA).

scholarly journals MAGNETIC AND DIELECTRIC PROPERTIES OF POLYMER-CERAMIC COMPOSITES SYNTHESIZED USING A MELT COMPOUND TECHNIQUE

2013 ◽  
Vol 22 ◽  
pp. 552-557 ◽  
Author(s):  
RAJSHREE JOTANIA ◽  
CHETAN CHANMAL ◽  
JYOTI JOG
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Polymer System ◽  
Weight Percent ◽  
Ceramic Composites ◽  
Melt Mixing ◽  
New Class ◽  
Melt Compounding ◽  
Magnetic And Dielectric Properties ◽  
Magnetic Dielectric

Polymer composites have emerged as a new class of materials, which have attracted technologist as they display novel properties compared to traditional materials and dramatically improves the performance properties of polymer system. We have synthesized hexaferrite-polymer composites of Polyvinylidene Fluride (PVDF) with BaCa2Fe16O27 (2.0, 5.0 % wt/vol.) using a melt compounding technique. BaCa2Fe16O27 hexaferrite powder was prepared using a microemulsion technique and directly mixed in melted PVDF, following by a low temperature hot pressing. The composites of PVDF with various weight percent of BaCa2Fe16O27 (2.0 & 5.0% wt/vol.) were processed via melt mixing at 200°C, with 60 rpm for 5 minutes. The films of uniform thickness are about 0.5 mm is obtained by a compression molded instrument at 200°C under 5-ton pressure. The influence of BaCa2Fe16O27 hexaferrite contents on magnetic and dielectric properties of composite was investigated. The prepared PVDF- BaCa2Fe16O27 composite thick films were characterized for their magnetic; dielectric and thermal behavior employing magnetic, dielectric and thermal analysis (TGA/DTA). Maximum saturation magnetization was obtained for 5 % wt/vol. of barium calcium hexaferrite composite.

scholarly journals Effect of Chemical Treatment on Thermal Properties of Jute Fiber Used in Polymer Composites

2020 ◽  
Vol 4 (3) ◽  
pp. 132
Author(s):  
Sweety Shahinur ◽  
Mahbub Hasan ◽  
Qumrul Ahsan ◽  
Julfikar Haider
Keyword(s):  
Thermal Properties ◽  
Polymer Composites ◽  
Thermo Gravimetric Analysis ◽  
Natural Fibers ◽  
Fire Retardant ◽  
Thermal Characterization ◽  
Decomposition Temperature ◽  
Jute Fiber ◽  
Differential Scanning Calorimetric ◽  
Gravimetric Analysis

In recent years, natural fibers, such as jute has gained significant research interest in order to fabricate fiber reinforced polymer composites. Chemical treatments are generally carried out on the raw fibers for making composites with improved properties. From a composite manufacturing point of view, it is important to understand how the treatments can affect the thermal properties of the jute fiber. In the present research, the effects of rot-retardant, fire-retardant and water-retardant treatments on thermal properties of the jute fiber were investigated. Fiber samples were collected from the middle portion of whole jute fiber. Thermo-gravimetric analysis (TGA) and differential scanning calorimetric (DSC) analysis were subsequently conducted on the jute fiber for thermal characterization. The results demonstrated a lower thermal decomposition temperature in the case of fire-retardant treated jute fiber but higher residue at above 400 °C, as compared to the raw and other treated fibers. In general, it was found that chemically treated fibers absorbed less heat, in contrast to the raw jute fiber and heat flow became negative in all cases of the treated fibers. This study provides important information about the thermal properties of the treated jute fibers for manufacturing polymer-based composite materials.

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