Microwave properties of natural rubber based composites containing carbon black-magnetite hybrid fillers

2018 ◽  
Vol 25 (3) ◽  
pp. 611-620 ◽  
Author(s):  
Ahmed A. Al-Ghamdi ◽  
Omar A. Al-Hartomy ◽  
Falleh Al-Solamy ◽  
Nikolay Dishovsky ◽  
Petrunka Malinova ◽  
...  
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Microwave Properties ◽  
Synthesis And Characterization ◽  
Hybrid Filler ◽  
Hybrid Fillers ◽  
True Hybrid ◽  
Magnetite Phase ◽  
Microwave Characteristics

Abstract The paper presents the synthesis and characterization of a carbon black-magnetite hybrid filler. The complex study on the structure of the filler has shown the magnetite phase to be distributed both over the surface (inter-aggregately) and inside (intra-aggregately) the carbon black particles, thus forming a true hybrid material. The results from the investigations on the mechanical and microwave properties of natural rubber-based composites filled with the new hybrid filler have been also reported. They have been compared to those of a composite comprising the physical mixture of carbon black and magnetite (at the same ratio as in the hybrid filler). The determined microwave characteristics of the composite comprising the hybrid filler obtained reveal the possibility for its use in manufacturing elastomer-based microwave absorbers.

Preparation and Characterization of Natural Rubber Composites Comprising Conductive Carbon Black/Magnetite Hybrid Fillers Obtained by Impregnation Technology

2016 ◽  
Vol 55 (13) ◽  
pp. 1344-1356
Author(s):  
Ahmed A. Al-Ghamdi ◽  
Omar A. Al-Hartomy ◽  
Falleh R. Al-Solamy ◽  
Nikolay Dishovsky ◽  
Diana Zaimova ◽  
...  
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Rubber Composites ◽  
Conductive Carbon Black ◽  
Hybrid Fillers ◽  
Natural Rubber Composites

Microwave properties of natural rubber based composites comprising conductive carbon black/silica hybrid fillers

2016 ◽  
Vol 23 (9) ◽  
Author(s):  
Ahmed A. Al-Ghamdi ◽  
Omar A. Al-Hartomy ◽  
Falleh R. Al-Solamy ◽  
Nikolay Dishovsky ◽  
Mihail Mihaylov ◽  
...  
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Microwave Properties ◽  
Conductive Carbon Black ◽  
Hybrid Fillers ◽  
Silica Hybrid

scholarly journals Assessment of Graphene Oxide and Nanoclay Based Hybrid Filler in Chlorobutyl-Natural Rubber Blend for Advanced Gas Barrier Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1098
Author(s):  
Jibin Keloth Paduvilan ◽  
Prajitha Velayudhan ◽  
Ashin Amanulla ◽  
Hanna Joseph Maria ◽  
Allisson Saiter-Fourcin ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Carbon Black ◽  
Natural Rubber ◽  
Gas Permeability ◽  
Chemical Properties ◽  
Barrier Properties ◽  
Hybrid Filler ◽  
Physical And Chemical ◽  
Chlorobutyl Rubber ◽  
And Chemical Properties

Nanomaterials have engaged response from the scientific world in recent decades due to their exceptional physical and chemical properties counter to their bulk. They have been widely used in a polymer matrix to improve mechanical, thermal, barrier, electronic and chemical properties. In rubber nanocomposites, nanofillers dispersion and the interfacial adhesion between polymer and fillers influences the composites factual properties. In the present work, a comparison of the hybrid effects of carbon black with two different nanofillers (graphene oxide and nanoclay) was studied. The 70/30 composition of chlorobutyl rubber/natural rubber elastomer blend was taken as per the blend composition optimized from our previous studies. The hybrid effects of graphene oxide and nanoclay in dispersing the nanofillers were studied mainly by analyzing nanocomposite barrier properties. The results confirm that the combined effect of carbon black with graphene oxide and nanoclay could create hybrid effects in decreasing the gas permeability. The prepared nanocomposites which partially replace the expensive chlorobutyl rubber can be used for tyre inner liner application. Additionally, the reduction in the amount of carbon black in the nanocomposite can be an added advantage of considering the environmental and economic factors.

Characterization of hybrid fillers based on carbon black of different types obtained by impregnation

2015 ◽  
Vol 231 (7) ◽  
pp. 584-599 ◽  
Author(s):  
Ahmed A Al-Ghamdi ◽  
Omar A Al-Hartomy ◽  
Falleh R Al-Solamy ◽  
Nikolay Dishovsky ◽  
Petrunka Malinova ◽  
...  
Keyword(s):  
Carbon Black ◽  
Inductively Coupled Plasma ◽  
Total Pore Volume ◽  
Silica Content ◽  
Dual Phase ◽  
Hybrid Filler ◽  
Average Pore ◽  
Hybrid Fillers ◽  
Different Types ◽  
Two Phases

The paper presents the investigations on obtaining dual phase fillers with preset silica content running a successful impregnation of two completely different types of conventional carbon black with silicasol. The hybrid fillers studied were characterized by atomic absorption spectroscopy and inductively coupled plasma–optical emission spectroscopy. The total pore volume, the average pore diameter, the specific surface area, the oil absorption number, and iodine adsorption of the fillers were also investigated. The distribution of both phases within the hybrid filler obtained and their interpenetration were investigated with scanning transmission electron microscopy-energy dispersive X-ray spectroscopy. The hybrid products obtained were investigated as reinforcing fillers of natural rubber-based composites. The results obtained show that the suggested impregnation with silicasol of conventional carbon black is a perspective method for preparation of carbon-silica dual phase fillers. The method provides an easy control over the quantitative ratio between the two phases. The fillers thus prepared do not change significantly the curing and mechanical characteristics of the vulcanizates, but improve their thermal aging resistance. The isolation of the carbon black aggregates by the silica phase, and the interpenetration of the two phases is a prerequisite to obtain elastomer composites of good mechanical and microwave properties suitable for producing of microwave shielding devices.

scholarly journals Dielectric and Microwave Properties of Graphene Nanoplatelets /Carbon Black Filled Natural Rubber Composites

2012 ◽  
Vol 2 (3) ◽  
pp. 116-122 ◽  
Author(s):  
Omar A. Al-Hartomy ◽  
Ahmed A. Al-Ghamdi ◽  
Falleh Al-Salamy ◽  
Nikolay Dishovsky ◽  
Rossitsa Shtarkova ◽  
...  
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Graphene Nanoplatelets ◽  
Microwave Properties ◽  
Rubber Composites ◽  
Natural Rubber Composites

EFFECT OF CELLULOSE FIBER SURFACE TREATMENT TO REPLACE CARBON BLACK IN NATURAL RUBBER HYBRID COMPOSITES

2021 ◽  
Author(s):  
Hossein Kazemi ◽  
Frej Mighri ◽  
Keun Wan Park ◽  
Slim Frikha ◽  
Denis Rodrigue
Keyword(s):  
Carbon Black ◽  
Natural Rubber ◽  
Surface Treatment ◽  
Hybrid Composites ◽  
Tensile Modulus ◽  
Fiber Surface ◽  
Cellulose Fiber ◽  
Cellulose Fibers ◽  
Infrared Spectrometry ◽  
Hybrid Filler

ABSTRACT In recent years, cellulose fibers have attracted considerable attention as biofillers for natural rubber (NR) composites. However, neat cellulose cannot be used as a substitute for conventional fillers due to its poor compatibility with NR. Therefore, a new surface treatment via maleic anhydride grafted to polyisoprene (MAPI) in solution was developed to improve the filler–matrix interaction. Different contents of carbon black (CB) and cellulose fibers (before and after modification) were used as a hybrid filler system to investigate the possibility of CB substitution in NR composites. First, contact angle, Fourier transformed infrared spectrometry (FTIR), and scanning electron microscopy (SEM) techniques were used to confirm the successful cellulose surface treatment. Second, morphological analysis, Payne effect, and swelling behavior of the rubber compounds in toluene confirmed the effect of cellulose treatment on improving the interfacial filler–matrix adhesion. Finally, the results showed that the composite filled with 20 phr modified cellulose and 20 phr CB (50% replacement of CB) exhibited even better results than the composite filled with 40 phr of CB, since the tensile strength was only 7% lower, but the elongation at break, tensile modulus at 100%, and storage modulus at 25 °C were respectively 35%, 24%, and 22% higher.

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