Ethan Clarke
Plastic is a solid synthetic product derived from petrochemical-based manufacturing. The word 'plastic' comes from the Ancient Greek πλαστικός (plastikos), meaning capable of being shaped or molded. Natural materials such as cellulose, coal, natural gas, salt, and crude oil are used in the production of plastics. However, conventional plastics derived from crude oil and petroleum hydrocarbons have raised environmental concerns due to their non-biodegradability and challenging recyclability. To address these issues, researchers have explored the development of mineral plastics or bioplastics that are more environmentally friendly and biodegradable. These new plastics are inspired by natural processes and aim to combine the advantages of biomaterials and conventional plastics.
| Characteristics | Values |
|---|---|
| What is plastic derived from? | Natural, organic materials such as cellulose, coal, natural gas, salt, and crude oil |
| What is crude oil? | A complex mixture of thousands of compounds that needs to be processed before it can be used to create plastic |
| How is crude oil processed? | Through distillation, which separates heavy crude oil into lighter components called fractions |
| What are fractions? | Mixtures of hydrocarbon chains (chemical compounds made up of carbon and hydrogen) that differ in molecular size and structure |
| What fraction is crucial for plastic production? | Naphtha |
| What processes are used to produce plastics? | Polymerisation and polycondensation |
| What are bioplastics made from? | Renewable plant materials |
| What are mineral plastics? | A new class of plastics inspired by nature that is easily degradable |
| What are mineral plastics made from? | Calcium carbonate and polyacrylic acid |
| What are the characteristics of mineral plastics? | Malleable, self-healing, stretchable, and capable of solidifying into transparent objects |
Explore related products
What You'll Learn
Plastic is derived from crude oil
Plastic can either be synthetic or biobased. Synthetic plastics are derived from fossil fuels such as crude oil, natural gas, and coal. Crude oil is the principal source of carbon for modern plastic. Crude oil is a complex mixture of thousands of compounds and needs to be processed before it can be used to make plastic. The production of plastics begins with the distillation of crude oil in an oil refinery. This separates the heavy crude oil into groups of lighter components, called fractions. Each fraction is a mixture of hydrocarbon chains (chemical compounds made up of carbon and hydrogen), which differ in terms of the size and structure of their molecules. One of these fractions, naphtha, is the crucial compound for the production of plastics.
Two main processes are used to produce plastics – polymerisation and polycondensation – and they both require specific catalysts. The majority of HGLs produced in the United States are byproducts of natural gas processing, and the rest are produced at crude oil/petroleum refineries. The HGLs produced by U.S. petroleum refineries contain both alkanes and olefins. Alkanes can be used as feedstock for petrochemical crackers, whereas olefins, primarily propylene, can be used as direct inputs into plastics manufacturing.
Biobased plastics, on the other hand, come from renewable products such as carbohydrates, starch, vegetable fats and oils, bacteria, and other biological substances. The vast majority of plastic in use today is synthetic because of the ease of manufacturing methods involved in the processing of crude oil. However, the growing demand for limited oil reserves is driving a need for newer plastics from renewable resources such as waste biomass or animal waste products from the industry.
A new class of plastics, called mineral plastics, has been inspired by nature and is easily degradable. Conventional plastics are usually not biodegradable, and the recycling process also requires energy. Mineral plastics are based on calcium carbonate nanoparticles linked by polyacrylic acid. The hydrogel can be produced without energy input at room temperature and is malleable and self-healing.
The Ultimate Guide: Installing Plastic Gas Filters
You may want to see also
Explore related products
Plastic is made via polymerisation or polycondensation
Plastic is derived from natural, organic materials such as cellulose, coal, natural gas, salt, and, most commonly, crude oil. Crude oil is a complex mixture of thousands of compounds and must be processed before it can be used to make plastic. The production of plastics begins with the distillation of crude oil in an oil refinery, which separates the heavy crude oil into groups of lighter components called fractions. One of these fractions, naphtha, is crucial for the production of plastics.
Plastics are made from these natural materials through a polymerisation or polycondensation process. Polymerisation is a process in the petroleum industry where light olefin gases (gasoline) such as ethylene, propylene, and butylene (monomers) are converted into higher molecular weight hydrocarbons (polymers). This occurs when monomers are chemically bonded into chains through the introduction of a catalyst, typically a peroxide. This process is known as chain growth polymers, as it adds one monomer unit at a time. Common examples of addition polymers include polyethylene, polystyrene, and polyvinyl chloride.
Condensation polymerisation, on the other hand, involves joining two or more different monomers by removing small molecules such as water. Two monomers combine to form a dimer (two units) by releasing a byproduct, and these dimers can then join to form tetramers (four units). The removal of byproducts is necessary for the success of the reaction.
The polymerisation process generates thick, viscous substances known as resins, which are used to make plastic products. Ethylene, a gaseous hydrocarbon, is subjected to heat, pressure, and a specific catalyst, resulting in long, repeating carbon chains. These joined molecules, or polymers, form a plastic resin called polyethylene (PE). PE-based plastic pellets are produced in a factory and then melted into a thick liquid to be cast into a mould. The liquid cools and hardens into a solid plastic, creating the finished product.
While conventional plastics are typically made from non-biodegradable crude oil, a new class of "mineral plastics" has emerged with the potential to replace traditional plastics. This innovation, developed by a research group led by Professor Helmut Cölfen of the University of Konstanz, is inspired by nature and is easily degradable. The "mineral plastic" is a hydrogel made from calcium carbonate and polyacrylic acid, which can be produced at room temperature without energy input. It is non-toxic, malleable, and self-healing, making it a promising alternative to conventional plastics and a potential contributor to solving environmental issues.
Creating Fabric From Plastic: A Sustainable Approach
You may want to see also
Explore related products
Mineral plastic is a new class of plastic
The process of creating mineral plastic is inspired by mineralization in nature and guided by the principles of green chemistry. It involves mixing two stock solutions, one with 0.1 M CaCl2 and 0.1 M PAA and the other with 0.1 M Na2CO3. The high amount of PAA stabilizes the amorphous phase of CaCO3, resulting in a dough-like soft hydrogel. This hydrogel is shapeable, stretchable, and self-healable, and can be solidified reversibly to form transparent objects.
One of the key advantages of mineral plastic is its environmental friendliness. Conventional plastics are based on crude oil and cause environmental problems due to their non-biodegradability and costly recyclability. Mineral plastic, on the other hand, is biodegradable and can be easily recycled by simply immersing it in water and reshaping it.
Mineral plastic also has potential applications in building and construction due to its special swelling capacity and hardness after drying. It can be used to fill cracks and has a smooth surface with higher hardness and modulus than conventional plastics. Additionally, colors can be easily introduced to mineral plastic, making it versatile for various applications.
Overall, mineral plastic presents an innovative and sustainable alternative to conventional plastics, offering degradability, recyclability, and comparable mechanical properties. With its unique characteristics, mineral plastic has the potential to revolutionize the plastics industry and contribute to solving environmental challenges.
Resin vs Plastic: Which Material Offers Superior Durability?
You may want to see also
Explore related products
Mineral plastic is made from calcium carbonate
Plastic is typically derived from natural, organic materials such as cellulose, coal, natural gas, salt, and crude oil. However, there is a new class of plastics inspired by nature that is easily degradable and made from minerals. This "mineral plastic" is made from calcium carbonate and polyacrylic acid in water, and it has the potential to replace conventional plastics that are harmful to the environment.
Mineral plastic is produced at room temperature and is malleable and self-healing. It can be recycled or transformed and is non-toxic. In its dry state, it has the consistency of a crab shell. The production process is based on the principle of ""green chemistry," inspired by mineralisation in nature, which is centred on calcium carbonate.
Calcium carbonate is the main component in egg shells, where it is held together by a protein matrix. In the context of plastic production, calcium carbonate is an important inorganic powder additive. It is widely used due to its richness in carbonate calcium, low cost, good stability, pure colour, low wear, ease of drying and processing, and non-toxicity.
When used in plastic processing, calcium carbonate helps to reduce wear on steel, making it a desirable additive. It is also used in stone paper products, also known as bio-plastic paper, mineral paper, or rich mineral paper. These products are strong and durable, with a density range of 1.0–1.6 g/cm3 (0.58–0.92 oz/cu in), and a texture similar to the outer membrane of a boiled egg. They are not biodegradable or compostable but are photo-degradable by ultraviolet (UVa) light in daylight.
Managing Plastic Waste: Current Strategies and Challenges
You may want to see also
Explore related products
Plastic is a solid synthetic product
The world's first fully synthetic plastic was Bakelite, invented in 1907 by Leo Baekeland, who is credited with coining the term "plastics." Since then, dozens of different types of plastics have been developed, including commonly used ones like polyethylene and polyvinyl chloride (PVC).
Plastics are primarily composed of synthetic or semisynthetic materials, with a small but growing proportion being produced from renewable resources. Synthetic plastics make up the majority of plastics in use today, and are derived from crude oil, natural gas, or coal. The production of synthetic plastics involves drilling and extracting oil from underground sources, followed by refining and distillation processes to separate crude oil into fractions with different molecular structures. One of these fractions, naphtha, is crucial for plastic production.
Biobased plastics, on the other hand, are derived from renewable sources such as carbohydrates, starch, vegetable fats, oils, and other biological substances. The development of biobased plastics is driven by the increasing demand for limited oil reserves and the need for more sustainable alternatives.
In recent years, researchers have also been exploring the potential of "mineral plastics" as an environmentally friendly alternative to conventional plastics. These mineral plastics are inspired by nature and are designed to be easily degradable. For instance, a research group led by Helmut Cölfen at the University of Konstanz has developed a mineral plastic made from calcium carbonate and polyacrylic acid, which can be recycled, transformed, and self-heals when water is applied to cracks. This non-toxic plastic material may contribute to addressing environmental concerns associated with conventional plastics.
Cutting Plastic Waste: Tips for a Greener Home
You may want to see also
Frequently asked questions
Plastics are usually made from natural, organic materials such as cellulose, coal, natural gas, salt, and crude oil.
Mineral plastics are made from calcium carbonate and polyacrylic acid.
Conventional plastics are not biodegradable, whereas mineral plastics are.
Mineral plastics can be used in building applications to fill cracks. They can also be used as temperature sensors as they change colour when heated.
Bioplastics are made from renewable plant materials.
