scholarly journals Investigation of Dielectric Properties of Industrial Waste Reinforced Particulate Polymer Composites

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Vijaya Kumar Nimmagadda ◽  
M. M. M. Sarcar ◽  
Ramji Koona
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Industrial Waste ◽  
Unsaturated Polyester ◽  
Low Cost ◽  
Dielectric Strength ◽  
Good Alternative ◽  
Industrial Wastes ◽  
Polyester Matrix ◽  
Paper And Pulp

Environmental awareness today motivates the worldwide researchers on the studies of industrial waste reinforced polymer composites. Rapid industrialization has resulted in the generation of huge quantity of solid and liquid wastes such as sugar, paper and pulp, fruit and food processing, distilleries, dairies, and poultries. The redundancy of industrial waste and government regulations have prompted researchers to try for industrial waste reinforced composites. Being low cost, ease of manufacturing, and high mechanical and other properties, an industrial waste represents a good alternative to the most common composites. In the present study, industrial wastes collected from different industries are used as particulate reinforcement in unsaturated polyester matrix and also in polypropylene and investigated dielectric properties. Results reveal that coupling agent treated composites produce improved dielectric strength due to improvement in compatibility between matrix and reinforcement interface. Results also reveal that industrial waste reinforced in polypropylene has more dielectric strength as compared to reinforcement in polyester.

Sorption of heavy metals from industrial waste water by low-cost mineral silicates

Clay Minerals ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 469-477 ◽  
Author(s):  
A. Garcia Sanchez ◽  
E. Alvarez Ayuso ◽  
O. Jimenez de Blas
Keyword(s):  
Waste Water ◽  
Heavy Metals ◽  
Industrial Waste ◽  
Low Cost ◽  
Reaction Medium ◽  
Cost Effective ◽  
Industrial Wastes ◽  
Industrial Waste Water ◽  
Adsorption Processes ◽  
Mineral Silicates

AbstractThe adsorption by different silicate minerals of some heavy metals, present in industrial waste water, has been studied. These adsorbents (mainly clay minerals) are readily available, inexpensive materials and offer a cost-effective alternative to conventional treatment of wastes from the metal finishing industry. The results show that some mineral species are suitable for the purification of such residual waters down to the limits prescribed by current legislation concerning industrial wastes. The Langmuir model was found to describe such adsorption processes best. Sepiolite (Orera, Spain) has an adsorption capacity of 8.26 mg g-1 for Cd2+, the capacities depending on the metal adsorbed in the order: Cd2+ > Cu2+ > Zn2+ > Ni2+. This mineral shows the highest sorption capacity relative to the other minerals studied. Factors in the reaction medium such as pH and ionic strength influenced the adsorption process.

Structure of Polymer Composites on Basis of Epoxy Resin and Organic and Inorganic Dispersed Industrial Wastes

2016 ◽  
Vol 871 ◽  
pp. 216-222 ◽  
Author(s):  
Ruslan Razinovich Galeev ◽  
Natalya Vyacheslavovna Maisuradze ◽  
Lyailya Abdullovna Abdrakhmanova
Keyword(s):  
Epoxy Resin ◽  
Polymer Composites ◽  
Industrial Waste ◽  
Industrial Wastes ◽  
Filler Concentration ◽  
Technological Parameters ◽  
Epoxy Binders ◽  
Particulate Filler ◽  
Submolecular Structure

he paper presents the influence of the conditions of combining of the epoxy binders and particulate filler on the formation of submolecular structure of the composites. The optimum concentrations of filler among industrial waste in the composition content has been determined and the dependence of the formation of the structure of the following technological parameters such as filler concentration, order of components combining (epoxy resin, hardener and filler), solidification modes of the composition has been identified. Microphotographs of the structure and interpretation of the connection of the properties of the composites and their structure are presented below.

scholarly journals Influence of Kaolin particulate and Luffa cylindrica fiber on the mechanical properties polyester matrix

2021 ◽  
Author(s):  
Aliyu Yaro ◽  
Laminu Kuburi ◽  
Musa Abiodun Moshood
Keyword(s):  
Mechanical Properties ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Low Cost ◽  
Polymeric Materials ◽  
Weight Fraction ◽  
Mechanical Analysis ◽  
Industrial Applications ◽  
Luffa Cylindrica ◽  
Polyester Matrix

AbstractPolymeric materials are used in different industrial applications because they retain good environmental properties, low-cost, and easy to produce compared to conventional materials. This study investigated the effect of adding Kaolin particulate (KFP) and Luffa cylindrica fiber (LCF) on the mechanical properties of polyester resin. Luffa cylindrica fiber was treated with 5% NaOH, varied in weight fraction (5, 10, and 15%wt), and was used to reinforce unsaturated polyester resin using the hand lay-up method, whereas, for the hybrid composite, Kaolin particulates were kept constant at 6wt% fraction while the fibers varied as in the mono-reinforced composite. The samples were machined for mechanical analysis. Analysis of the result revealed that the reinforcement has enhanced greatly the mechanical properties of polyester composites.

Dielectric Properties of Lead Monoxide Filled Unsaturated Polyester Based Polymer Composites

2011 ◽  
Author(s):  
V. Harish ◽  
H. G. Harish Kumar ◽  
N. Nagaiah ◽  
Alka B. Garg ◽  
R. Mittal ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Unsaturated Polyester ◽  
Lead Monoxide

Improvement of Environmental Safety due to Utilization of Industrial Wastes in Refractory Concretes Production

2017 ◽  
Vol 265 ◽  
pp. 43-46
Author(s):  
V.A. Perfilov ◽  
Dmitry V. Oreshkin
Keyword(s):  
Heat Treatment ◽  
Industrial Waste ◽  
Low Cost ◽  
Physical And Mechanical Properties ◽  
Environmental Safety ◽  
Industrial Wastes ◽  
Refractory Materials ◽  
Ecological State ◽  
Natural Conditions ◽  
Fibrous Concrete

The article suggests recycling aluminium and pipe industry wastes in the production of refractory materials. New compositions of light fibrous concrete are developed, compared to the known structures they have improved physical and mechanical properties and a low cost. This is achieved due to the lack of heat treatment and utilization of industrial waste. Aluminous slag and sulphate sludge are stored in open landfills. Recycling of slag and sludge helps to improve the ecological state of environment. This article describes the chemical composition of the waste and suggests the optimal ratio of the mixture components. The properties of refractory fibrous concretes were defined at hardening of mixture in the natural conditions in the absence of heat treatment.

scholarly journals Seawater-Neutralized Bauxite Residue–Polyester Composites as Insulating Construction Materials

Buildings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 20
Author(s):  
Maissa Adi ◽  
Basim Abu-Jdayil ◽  
Fatima Al Ghaferi ◽  
Sara Al Yahyaee ◽  
Maryam Al Jabri
Keyword(s):  
Tensile Strength ◽  
Mechanical Performance ◽  
Unsaturated Polyester ◽  
Bauxite Residue ◽  
Construction Materials ◽  
Stress Transfer ◽  
Industrial Wastes ◽  
Compressive Properties ◽  
Lower Efficiency ◽  
Polyester Matrix

Bauxite residue (BR) is one of the most commonly generated industrial wastes in the world. Thus, novel techniques for its proper utilization must be urgently developed. Herein, seawater-neutralized BR–unsaturated polyester resin (UPR) composites are presented as insulating construction materials with promising mechanical performance. Composites with different BR content (0–60 vol.%) were prepared to evaluate the influence of BR content on the compressive, tensile, and flexural strengths as well as the moduli of BR–UPR composites. Experimental results revealed that adding BR particles to the polyester matrix increased the compressive properties (strength, modulus, and strain). The composites containing 20 vol.% BR showed the maximum compressive strength (108 MPa), while the composites with 30 vol.% BR exhibited the maximum compressive modulus (1 GPa). Moreover, the reduction in tensile and flexural strengths with an increase in the BR content may be attributed to the lower efficiency of stress transfer between the BR particle–polyester interface due to weak adhesion at the interface, direct contact between particles, and presence of voids or porosity. Although the tensile strength and failure stress decreased with increasing filler content, the produced composites showed outstanding tensile strength (4.0–19.3 MPa) compared with conventional insulating materials. In addition, the composite with 40 vol.% BR demonstrated a flexural strength of 15.5 MPa. Overall, BR–UPR composites showed excellent compatibility with promising mechanical properties as potential insulating construction materials.

A Study of Some Mechanical and Physical Properties for Palm Fiber/Polyester Composite

2020 ◽  
Vol 38 (3B) ◽  
pp. 104-114
Author(s):  
Samah M. Hussein
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Dielectric Constant ◽  
Date Palm ◽  
Volume Fraction ◽  
Unsaturated Polyester ◽  
Dielectric Strength ◽  
Palm Fiber ◽  
Mechanical And Physical Properties ◽  
Polyester Composite

This research has been done by reinforcing the matrix (unsaturated polyester) resin with natural material (date palm fiber (DPF)). The fibers were exposure to alkali treatment before reinforcement. The samples have been prepared by using hand lay-up technique with fiber volume fraction of (10%, 20% and 30%). After preparation of the mechanical and physical properties have been studied such as, compression, flexural, impact strength, thermal conductivity, Dielectric constant and dielectric strength. The polyester composite reinforced with date palm fiber at volume fraction (10% and 20%) has good mechanical properties rather than pure unsaturated polyester material, while the composite reinforced with 30% Vf present poor mechanical properties. Thermal conductivity results indicated insulator composite behavior. The effect of present fiber polar group induces of decreasing in dielectric strength, and increasing dielectric constant. The reinforcement composite 20% Vf showed the best results in mechanical, thermal and electrical properties.

scholarly journals Dielectric Properties of Wood-Polymer Composites: Effects of Frequency, Fiber Nature, Proportion, and Chemical Composition

2021 ◽  
Vol 5 (6) ◽  
pp. 141
Author(s):  
Imen Elloumi ◽  
Ahmed Koubaa ◽  
Wassim Kharrat ◽  
Chedly Bradai ◽  
Ahmed Elloumi
Keyword(s):  
Dielectric Properties ◽  
Polymer Composites ◽  
Wide Frequency Range ◽  
Dielectric Constants ◽  
Cellulose Content ◽  
Wood Fibers ◽  
Low Frequencies ◽  
Wood Polymer ◽  
Wood Polymer Composites ◽  
New Applications

The characterization of the dielectric properties of wood–polymer composites (WPCs) is essential to understand their interaction with electromagnetic fields and evaluate their potential use for new applications. Thus, dielectric spectroscopy monitored the evolution of the dielectric properties of WPCs over a wide frequency range of 1 MHz to 1 GHz. WPCs were prepared using mixtures of different proportions (40%, 50%, and 60%) of wood and bark fibers from various species, high-density polyethylene, and maleated polyethylene (3%) by a two-step process, extrusion and compression molding. Results indicated that wood fibers modify the resistivity of polyethylene at low frequencies but have no effect at microwave frequencies. Increasing the fiber content increases the composites’ dielectric properties. The fibers’ cellulose content explains the variation in the dielectric properties of composites reinforced with fibers from different wood species. Indeed, composites with high cellulose content show higher dielectric constants.

scholarly journals Thermoelectric Performance of Mechanically Mixed BixSb2-xTe3—ABS Composites

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1706
Author(s):  
Zacharias Viskadourakis ◽  
Argiri Drymiskianaki ◽  
Vassilis M. Papadakis ◽  
Ioanna Ioannou ◽  
Theodora Kyratsi ◽  
...  
Keyword(s):  
Polymer Composites ◽  
Large Scale ◽  
Low Cost ◽  
Acrylonitrile Butadiene Styrene ◽  
Thermoelectric Performance ◽  
Scale Production ◽  
Bismuth Antimony Telluride ◽  
Mechanical Mixing ◽  
Large Scale Production ◽  
Bi Doping

In the current study, polymer-based composites, consisting of Acrylonitrile Butadiene Styrene (ABS) and Bismuth Antimony Telluride (BixSb2−xTe3), were produced using mechanical mixing and hot pressing. These composites were investigated regarding their electrical resistivity and Seebeck coefficient, with respect to Bi doping and BixSb2-xTe3 loading into the composite. Experimental results showed that their thermoelectric performance is comparable—or even superior, in some cases—to reported thermoelectric polymer composites that have been produced using other complex techniques. Consequently, mechanically mixed polymer-based thermoelectric materials could be an efficient method for low-cost and large-scale production of polymer composites for potential thermoelectric applications.

Ultrasensitive, flexible, and low-cost nanoporous piezoresistive composites for tactile pressure sensing

Nanoscale ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 2779-2786 ◽  
Author(s):  
Jing Li ◽  
Santiago Orrego ◽  
Junjie Pan ◽  
Peisheng He ◽  
Sung Hoon Kang
Keyword(s):  
Carbon Nanotube ◽  
Polymer Composites ◽  
Low Cost ◽  
Pressure Sensors ◽  
Nanoporous Carbon ◽  
Pressure Sensing ◽  
Etching Method ◽  
Piezoresistive Pressure Sensors

We report a facile sacrificial casting–etching method to synthesize nanoporous carbon nanotube/polymer composites for ultra-sensitive and low-cost piezoresistive pressure sensors.

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