We live in a world built on materials, from the humble plastic bottle to the towering skyscrapers that define our cities. But what if there was a material that could be stronger, lighter, more sustainable, and more adaptable than anything we’ve ever seen before? Enter polymer-based composites (PMC), a revolutionary class of materials that are changing the world, one application at a time.
A Material with a Rich History:
The journey of PMC began long ago, back in the Stone Age, when humans first started using materials like wood and stone to build tools and structures. Over time, we’ve developed new materials, from metals to plastics, each with its own unique properties and applications. But PMC represents a new era, combining the best of both worlds: the strength and durability of polymers with the versatility and adaptability of composite materials.
The Power of Composites:
PMC are essentially a blend of two or more materials, each contributing its unique properties to the final product. The most common type of PMC uses polymers as the base material, reinforced with fibers, such as glass, carbon, or even natural fibers like bamboo and flax. This combination creates a material that’s lighter, stronger, and more resistant to corrosion than traditional materials.
Revolutionizing Transportation:
PMC are already making a big impact in the transportation industry. Their lightweight properties make them ideal for use in vehicles, reducing fuel consumption and emissions. They’re also used in aircraft, where their strength and durability are essential for safety and performance. And as we move towards a more sustainable future, PMC are playing a crucial role in developing lighter, more fuel-efficient vehicles.
Beyond Transportation:
The applications of PMC extend far beyond transportation. They’re used in construction, where their strength and durability make them ideal for building bridges, buildings, and other structures. They’re also used in the biomedical field, where their biocompatibility makes them suitable for implants, prosthetics, and drug delivery systems. And in the military, PMC are used to create lighter, more durable weapons and armor.
The Future of PMC:
The future of PMC is bright. As scientists continue to develop new and innovative materials, PMC are poised to play an even greater role in shaping our world. The use of nanotechnology is expected to further enhance the properties of PMC, making them even stronger, lighter, and more versatile. And as we strive to create a more sustainable future, PMC will play a crucial role in developing materials that are both durable and environmentally friendly.
A Material for Every Need
PMC are a versatile, adaptable, and sustainable class of materials that are changing the world. From transportation to medicine, from construction to the military, PMC are revolutionizing industries and shaping the future. They’re a testament to human ingenuity, showing that we can create materials that are both strong and sustainable, paving the way for a brighter and more innovative future.
Over the centuries, mankind has experienced from the Stone Age, Bronze Age, Iron Age, Glass Age, Steel Age, Aluminum Age to the current plastic (polymer) age. All these changes in the material era are because the human environment is constantly evolving and materials need to be improved to meet current needs and applications. Polymer matrix composites (PMCs) offer a range of excellent properties, including light weight, high stiffness, high specific strength, fatigue resistance, wear resistance, corrosion resistance, ease of manufacturing, cost-effectiveness, high design flexibility, and desirable thermal expansion properties . These properties make PMC a popular composite material type in many fields such as automobiles, aerospace, medical, civil, electronics, communications, sports, marine, military, energy, industry, construction and various household products. Compared to metal matrix and ceramic matrix composites, polymer matrix composites are easier to fabricate due to relatively low processing temperatures. The growing demand for sustainability, innovation and energy-saving technologies has prompted researchers and engineers to produce natural biodegradable polymer composites to replace synthetic composites to promote sustainable development. Therefore, natural fibers from plants and animals have received widespread attention, including hemp, cotton, jute, flax, bamboo, sisal, kenaf, rice husk, ramie, abaca, bagasse, coir, Kevlar wool , keratin wool, hair and silk. Research has found that when natural fibers (especially nanofibers) are used as reinforcing materials, they can significantly improve the material’s strength, stiffness, fracture toughness, thermal stability, electrical conductivity and wear resistance, making it very suitable for construction, automobiles and so on. , biomedicine, marine, aerospace and military and other different fields. Kevlar is an aramid fiber used as a reinforcement material for polymer-organic matrix composites. Its applications are becoming more and more widespread due to its excellent properties such as high tensile strength, light weight, stiffness and thermal stability. The use of Kevlar in composites helps develop high-performance materials and increase resource efficiency, making them suitable for various areas such as chassis, brake pads and different body parts of vehicles, combat helmets, ballistic face masks and ballistic protection for defense Vests, helicopter rotor blades, nose radomes, landing gear doors and aircraft propellers, bicycle tires, ropes and cables. In the biomedical field, keratin-based biomaterials are increasingly used in wound healing, drug delivery, and tissue engineering due to their inherent biological properties and excellent biocompatibility. Keratin is a fibrous protein that is the main structural component of hair, feathers, hooves, wool, and horns. It is a by-product of the poultry and livestock industry. There is growing research interest in the use of natural fibers such as sisal, jute, banana, coir, keratin and cotton as reinforcement materials as they are lightweight, low cost, environmentally friendly, thermal and sound insulating, and suitable for consumer goods, Biomedical industry, transportation industry, military and civil structures and many other industries.
To meet the demand for lightweight materials for automotive and other commercial applications, available polymer resources such as waste plastics are being investigated more. Recently, in order to meet the growing global demand for new materials, efforts have been made to promote the use of secondary materials instead of creating new materials. In addition, increased efforts are needed to find suitable application areas with potential for derived materials. Because many developed countries mandate the increased use of biodegradable materials in automobiles, aerospace, biomedicine and many other fields. In addition to improving the properties of certain polymer composites, some natural fillers can improve the degradation of synthetic polymers.
1. Automotive applications
The automotive industry is one of the biggest beneficiaries of PMC due to its cost savings and weight reduction. The mechanical properties provided by PMC are of unique importance in vehicle design, such as reducing vehicle weight to improve fuel efficiency and reduce exhaust emissions, thereby reducing air pollution. It is estimated that reducing the weight of a car by 25% can save about 250 million barrels of crude oil, while every 10% reduction in the weight of a car can increase fuel efficiency by 6%-8%. At the same time, passenger safety cannot be sacrificed to achieve these goals. Therefore, these three (lightweight, fuel efficiency and passenger safety) are the most important factors to consider in vehicle design. Natural fiber polymer composites have the characteristics of light weight, high strength, high stiffness, flexible design, high impact energy absorption rate, noise reduction and vibration reduction, corrosion and wear resistance, low production cost, and biodegradability, and are the first choice for such applications ideal material.
The use of natural fiber polymer composites (NFPC) in automotive components still has some disadvantages, such as high moisture absorption and high flammability. Therefore, there is a need to combine hybrid technologies with synthetic fibers to form more cost-effective hybrid composites with superior mechanical and structural properties.
2. Aerospace applications
It is estimated that the aerospace industry consumes approximately 50% of the entire advanced composites production in the United States. The aerospace industry uses these materials for similar reasons to the automotive industry. Weight reduction, cost savings and radiation shielding are top concerns for this industry. Weight reduction is critical as it affects factors such as fuel efficiency, speed, number of assembled parts, maneuverability and increased range. The lightweighting of polymers brings the greatest advantages to the aerospace industry, namely weight reduction and fuel savings. American Airlines operates a fleet of approximately 600 aircraft, and reducing the weight of each aircraft by 1 pound could save up to 11,000 gallons of fuel per year. Cost savings can be achieved in aircraft production by using fiber-reinforced polymer composites instead of metal alloys, lowering processing costs and reducing the number of assembled parts, thus reducing the costs associated with joining the various components together and maintaining them.
Studies have shown that polymer matrices reinforced with nanofillers provide better radiation protection compared to metal matrices. This provides higher X-ray protection. For example, silicone rubber is used in aircraft because it performs well at different temperatures, is resistant to radiation, chemicals and aging, and has unique electrical insulation properties, while carbon nanoparticles such as graphene, carbon nanotubes and carbon black Has excellent resistance to air oxidation.
Fiber-reinforced polymer (FRP) composites have unique mechanical, electrical and tribological properties, and their use in aircraft can improve design flexibility, reduce waste, improve corrosion and fatigue resistance, increase strength and stiffness, and improve the performance of interior panels. Flame retardant and heat resistance, improved damage and impact resistance, durability, reduced noise levels, vibration damping properties and fracture resistance. These allow polymer composites to be used in components such as aircraft brakes, bulkheads, window frames, rotors, supports, fuselages, aircraft wing boxes, fuselages, fittings, blades, vertical stabilizers, food tray arms and tail assemblies.
Hybrid composites have also been adopted recently as studies have shown that they have enhanced mechanical properties required for aerospace applications. The aircraft’s specific strength and resistance to rain erosion are improved through the use of hybrid kenaf/glass fiber reinforced polymer composites, while carbon fiber reinforced silicon carbide can often withstand temperatures up to 1200°C when used in the production of aircraft brakes. Hybrid FRP composites are widely used in various components of Boeing aircraft. In the A320 aircraft, the use of FRP composite materials can save approximately 800 kilograms of weight compared to the use of aluminum alloys. In the design and manufacturing of India’s 14-seater aircraft SARAS, the use of PMC helped reduce weight, nearly 25% less than aircraft using metal alloys. This model of PMC has only one fuselage component and no fasteners, while using metal alloys there are 31 different components with a total of 3,400 fasteners.
3. Biomedical applications
The medical field is recognized as a leading industry, and the application of polymer composite materials in the medical field has made the latest progress. Polymer composites are compatible with mechanical strength, biodegradability, precise control, biocompatibility, biomimicry, density, and bioabsorbability, among others. Biopolymer materials can cleverly mimic the morphological characteristics of biological materials due to their biocompatibility. Their application areas include, but are not limited to, wound dressings, medical devices, tissue engineering, oral tissue, protein immobilization, drug delivery, regenerative medicine, bone and ligament applications, blood vessels, antimicrobial materials, and surgical implants. The biomedical field utilizes natural polymers such as chitosan, collagen, guar gum, alginate, agar, pectin, plantain, pullulan, starch and cellulose, as well as synthetic polymers such as poly amide (PA), polyglycolic acid (PGA), polylactic acid (PLA), polycaprolactone (PCL), polylactic-co-glycolic acid (PLGA) and polyester amide (PEA), while also using fibers as its Main form of enhancement. More detailed uses of polymer composites in biomedical applications can be broadly divided into hard tissue (bone) and soft tissue (skin).
3.1. Bones
Bone is a morphological component that can adjust and reshape itself to adapt to any mechanical environment in which it is placed. Bones are composed of hydroxyapatite (HA) nanocrystals, bone cells, mucopolysaccharides, collagen fibers, and blood vessels. Hydroxyapatite is frequently used in implants and bone fillers and can be easily obtained from scrap animal bones. Their continued use includes their osteoconductivity, a property that allows bone cells to develop rapidly. Therefore, they can be used as bone fillers to aid in fracture repair, one of the most common disorders of the bones. Natural and synthetic degradable polymer composites are widely used as bone repair scaffolds due to their excellent mechanical and biological properties.
3.2. Skin
The skin is the largest immune system organ in the body. This gives it the responsibility of preventing pathogens from entering the body. However, the skin is still at risk for infection, burns, and necrosis. Therefore, the use of biodegradable and biocompatible polymer composites for skin regeneration has attracted great interest among researchers. Research has shown that polymeric materials are well suited for drug delivery systems, so they are widely used as drug delivery materials. For example, polymer-based hydrogels are used as carriers for drug molecules, such as anticancer, antibiotic, and antifungal drugs. In addition, polymeric materials are used in wound dressings to provide protection to the wound site and help speed up the healing process, and in tissue engineering to help replicate lost or damaged tissue by promoting the development of new cells.
4.Civil Engineering
Over the past few decades, the construction industry has sought new materials and new design processes to enhance the structural, mechanical and environmental performance of buildings and bridge structures around the world. Traditional materials steel, concrete and cement, although durable for a long time, are not sufficient to meet certain mechanical and environmental requirements, so it is necessary to research new materials that can meet these requirements. Concrete and cement, most commonly used in construction, are not innovative enough, and steel also performs poorly in some cases. Some disadvantages of these traditional materials are that cement production causes serious environmental problems, as producing one ton of cement produces approximately one ton of carbon dioxide, and the outer surface also deteriorates rapidly when exposed to alkaline or acidic environments. In addition, cement concrete also has the characteristics of high porosity, cavitation, low flexural strength, low wear resistance, low tensile strength, long setting time, and poor durability. Different types of degradation can occur when infrastructure is left unattended for long periods of time. Some of the causes of structural degradation include environmental exposure, use of substandard materials, poor design, poor construction quality, etc.
Nowadays, fiber reinforced polymer composites (FRPC) have been investigated as good material alternatives for numerous civil engineering applications because of their high strength, light weight, corrosion resistance, good ductility, easy processing, low cost, aesthetics, etc. Unique performance. FRPC helps improve the strength-to-weight ratio and stiffness-to-weight ratio compared to common building materials. For example, polymer concrete can be used to replace cement concrete because of its high strength, corrosion resistance, abrasion resistance, good chemical resistance, good ductility, high durability, low permeability, low maintenance requirements, low cure shrinkage, bonding It has good performance, environmental protection, high shock absorption, excellent weather resistance, and good freeze-thaw resistance. These properties make polymer concrete well suited for a variety of civil engineering applications including underground construction, bridge decks, building cladding, floor drains, sewer pipes, utility boxes, drinking water filter panels, precast products, industrial floors, floor drains, plumbing Structural, repair and maintenance purposes, precast and cast purposes, trench lines, geothermal energy, acid tanks, airport runways, etc. Furthermore, it is worth mentioning that in the development of polymer concrete, epoxy resins are mainly used as binders, while a wider range of materials are used as fillers. They include palm oil fuel ash, PET fiber, silica fume, bagasse ash, fly ash, marble waste, calcium carbonate, etc.
Advanced composite materials are critical to the construction industry. Corrosion is the main cause of concrete deterioration, and to prevent corrosion, FRPC panels are used to control the effects of corrosion, increase structural strength, and repair concrete columns by wrapping them with sheets. The energy absorption, shear capacity, load-bearing capacity and damage control of concrete columns are also improved. They are also used to strengthen highway structures, beams, bridge structures, slabs, railway structures, walls and beam-column joints.
5. Marine applications
In recent decades, advanced composite materials have been widely used in the marine industry due to their excellent engineering properties. Fiber-reinforced polymer composite (FRPC) materials can effectively utilize biothermoplastics such as polylactic acid (PLA) or other thermoplastics such as polyamide or polypropylene. There is currently a need for a further shift in material selection from epoxy and vinyl ester resins to carbon, glass and aramid reinforcements. The cost, weight and structural performance of large patrol boats constructed from steel, aluminum or sandwich materials were compared. The study found that the structural weight of a patrol boat made from glass-reinforced plastic (GRP) sandwich composites should be 10% lighter than an aluminum boat and 36% lighter than a steel boat of the same size. Additionally, the use of hybrid composites such as hybrid glassy carbon reinforced polymer composites (GCG2C) is most helpful in maintaining the mechanical properties required for the material to operate efficiently in the marine industry over the long term. Hybrid (GCG2C) has an extremely high flexural strength of 462 MPa and extremely low water absorption. Likewise, a hybrid flax and carbon fiber composite can be used to replace aluminum 6061 as a structural material as it improves shock absorption properties by approximately 141% and tensile strength by 252% while reducing weight by 49%. The use of jute and carbon fiber as reinforcements in hybrid composite structures also helps improve shock absorption properties as well as economic and environmental sustainability.
Advanced composite materials have some outstanding properties that have facilitated their use in the marine industry, including good strength-to-weight and stiffness-to-weight ratios, high durability, improved dimensional stability, increased range, and flatness to meet stealth requirements. , design flexibility, fuel reduction Consumption, manufacturing and maintenance costs, reduced electromagnetic characteristics, increased speed, reduced wear, low hygroscopicity, corrosion resistance, impact resistance and resistance, enhanced vibration damping properties, sound insulation, corrosion resistance to sea water, increased efficiency, high load carrying capacity, low inertia, increased buoyancy and high levels of acoustic transparency. Therefore, due to these excellent properties, marine industries such as shipbuilding, renewable energy, offshore structures and repairs use them extensively as accessories and internal equipment such as valves, pipes, pumps, heat exchangers, pipes, naval vessels , small ships, superstructures, masts, decks, bulkheads, machinery, propellers, rudders, propulsion shafts, used in destroyers, frigates and other warship equipment Equipment for accessories, hovercraft, corvettes, torpedo tubes, antenna boxes, engine components, fuel tanks (water, fuel, lubricants), ferries, rotor blades, gas pipelines, hulls, struts, floating platforms (e.g. tendons, vertical tubes and support structures), sailing boats, yachts and barges, superstructures, railings, nose radomes, tidal and wind turbine blades and sonar domes.
6.Military applications
Over the years, the use of nanomaterials has shown an alarming growth in the defense and military sectors, significantly improving the performance of military equipment and improving personnel comfort and survival chances. The applications of polymer nanocomposites (PNCs) have increased dramatically in various military and defense sectors such as sensing, military medicine, smart structures and textiles, power generation and management, military weapons and aerodynamics. PNC is a class of polymer composites in which the polymer matrix is reinforced with nanoscale particles (nanoparticles), resulting in excellent resistance to fatigue and fracture. PNC is used to produce military equipment, materials and structures that are lighter, smaller, cheaper, more precise, smarter and stronger.
In general, the military industry is closely linked to the transportation industry. Because the military and defense sectors inevitably use vehicles, aircraft, ships and drones. Compared with civilian vehicles, ships and aircraft, their uses are more special because they have properties such as flame retardancy, shock absorption, electromagnetic shielding, sensors, high temperature resistance, vehicle protective liners, actuators, ballistic resistance, electrical energy storage (capacitors ) and microwave absorption and other special requirements. In warships, for example, shipbuilding company Ingels Shipbuilding met some of these requirements by using carbon-reinforced vinyl ester resin and phenolic fiberglass laminates to build complete deckhouses and roofs, respectively. Among other parts of the ship, polymer composites are used to make antennas, masts and transparent radars. Similarly, components such as the fuselage, wings, horizontal and vertical stabilizers of Lockheed Martin’s F-35 Lightning fighter jet are also made of carbon fiber reinforced polymer (CFRP) composites to increase toughness and durability.
In the field of soldier protection, PNC can be effectively used to manufacture body armor, smart textiles, gloves and boots. Polymer matrices reinforced with nanomaterials such as Kevlar and graphene help produce high-tech combat suits that are extremely strong, smart and lightweight. When further applied shear thickening fluids (fluids containing dispersions of nanoparticles), such as silica nanoparticles in polyethylene glycol, will result in the production of more flexible, denser and stronger body armor. These body armors help the wearer move freely, protect the body from chemicals and toxins, and protect against the impact of high-velocity bullets and blunt objects such as iron bars, stones and sticks. “Star Wars” high-tech armor utilizes the unique properties of graphene nanofillers, which provide exceptional strength (100 times stronger than steel), light weight, high hydrophobicity, high durability, and excellent electrical and thermal conductivity and bulletproof capabilities. The armor consists of a tinted night vision helmet, radio cables, exoskeleton layers, gloves, padded khakis and a gun. Additional benefits of graphene, nanofillers, in polymer composites for military applications have been extensively described by some previous researchers.
7.Future trends
Currently, polymer-based composites are used in various areas of human activity, including transportation, civil construction, biomedicine, military, sports and leisure, food and packaging, and electrical and electronics. So, in the race for future materials, how can polymers solve future challenges? Nanotechnology has been identified as one of the ways forward, and by combining the advantages of nanotechnology with those of polymer-based materials, more advanced and dynamic materials will be obtained. The communications, electronics, energy, home furnishing, packaging, sports and leisure industries are no less popular in the application of polymer nanocomposites. For example, in the sports and leisure industry, Samsara Surfboards, an Australian surfboard manufacturing company, is producing ultra-performance surfboards that are sustainable and environmentally friendly. Made from a blend of flax/PP, flax/PLA and flax fibers, the surfboard is environmentally friendly throughout its life cycle. In addition, German company AX-Lightness GmbH, a major supplier of polymer composites to the Formula One world, has produced high-tech mountain bikes with wheels made of epoxy prepreg and woven carbon fiber as polymer matrix and reinforcement respectively. . In the field of electrical and electronics, PNC can be used to manufacture switchgear, panels, connectors, insulators, capacitor covers, earphone covers, lithium-ion battery covers, etc.