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How can Nano materials modify plastics?

Saudi Aramco, the world's largest oil company, released a briefing showing a profit of 181.64 billion Saudi riyals in the second quarter of 2022, once again setting a record for quarterly earnings after the company went public in 2019. Continue to maintain the status of "the most profitable company in the world".

Saudi Aramco said that the increase in profit in the second quarter was mainly due to higher crude oil prices and sales and improved profit margins in the refining processing and sales division, while the company's second-quarter shareholder dividend will reach 70.3 billion Saudi riyals.

In the first half of this year, the conflict between Russia and Ukraine disrupted the global energy market, with crude oil prices rising above $120 at one point, causing refining profits to soar, not only for Saudi Aramco, but also for companies such as ExxonMobil and Shell. ExxonMobil's second-quarter net profit tripled, while Shell's second-quarter profit hit a record high.

According to data released by the Saudi National Bureau of Statistics on July 31st, the country's GDP grew by 11.8% in the second quarter of 2022 compared with the same period last year.

The latest report released by the International Monetary Fund (IMF) on July 26th shows that Saudi Arabia's economic growth forecast for 2022 remains unchanged at 7.6%, which ranks first among the world's major economies.

Because of the turbulent international situation, the supply and prices of many international bulk aluminum oxide are still very uncertain.

On the basis of general plastics and engineering plastics, the flame retardancy, strength, impact resistance, toughness, aging resistance and antibacterial properties of plastics can be improved by filling, blending, strengthening and other methods.
Nano materials can:

1. Aging resistance of reinforced plastics
The aging of polymer materials, especially photooxidation aging, starts from the surface of materials or products, such as discoloration, pulverization, cracking, glossiness decline and so on, and then gradually goes deep into the interior. The anti-aging properties of polymers directly affect its service life and environment, especially for agricultural plastics and plastic building materials, which is not only an index that needs great attention, but also an important topic in polymer chemistry. The ultraviolet wavelength in sunlight is 200~400nm, while the ultraviolet in 280~400nm band can break the polymer molecular chain, thus making the material aging. Nano-oxides, such as nano-alumina, nano-titanium oxide, nano-silica and so on, have good absorption properties for infrared and microwave. The proper mixing of nano SiO2 and TiO2 can absorb a large amount of ultraviolet rays to prevent plastics from being damaged by sunlight, and help to prevent plastic products from cracking, discoloration and other light degradation, thus making the materials anti-aging.

2. Improve the antibacterial and anti-mildew properties of plastics
Antibacterial plastics are generally prepared by adding antimicrobial agents or antibacterial masterbatch to the resin. Because plastic molding has to go through high temperature, there are inorganic antimicrobial agents that can adapt to high temperature. Traditional antibacterial metal powders such as copper sulfate and zinc nitrate are not easy to combine directly into thermoplastics. Inorganic nano-antibacterial powder is specially treated to obtain antibacterial plastic masterbatch, which is easy to be used in plastic products and has good compatibility with plastics. It is beneficial to the dispersion of antimicrobial agents. Inorganic silver ions can be carried into nano titanium dioxide, nano-silicon aluminum oxide and other inorganic nano-materials, and the formed powder has good antibacterial properties, mixed with plastics, extruded and formed by ultraviolet irradiation to form antibacterial plastics. its antibacterial effect is formed by the slow release of antimicrobial agents, so as to achieve the antibacterial effect.

3. Improve the toughness and strength of plastics
When the second substance is added to the polymeric matrix, a composite is formed, and a more comprehensive material is obtained by compounding, which is used to improve the mechanical strength and impact strength of the material. The emergence of nanomaterials provides a new method and way for the reinforcement and toughening modification of plastics. The surface defects of small particle size dispersed phase are relatively few and there are many unpaired atoms. The ratio of surface atomic number to total atomic number of nanoparticles increases sharply with the decrease of particle size. The crystal field environment and binding energy of surface atoms are different from those of internal atoms, so they have great chemical activity. With the micronization of crystal field and the increase of active surface atoms, the surface energy is greatly increased, so it can be closely combined with polymer substrate and has good compatibility. When subjected to external force, the ion is not easy to detach from the substrate and can better transfer the external stress. At the same time, under the interaction of the stress field, there will be more microcracks and plastic deformation in the material, which can cause the substrate to yield and consume a lot of impact energy, so as to achieve the purpose of strengthening and toughening at the same time. The commonly used nano-materials are nano alumina, nano silica, nano-calcium carbonate, etc.

4. Improve the thermal conductivity of plastics
Thermal conductive plastics are a kind of plastic products with high thermal conductivity, which are generally higher than 1w/ (m. k). Thermal conductive plastics are more and more widely used because of their light weight, fast thermal conductivity, simple injection molding, low processing cost and so on. Because of its good insulation and thermal conductivity, nano-alumina is widely used in thermal conductive plastics, thermal conductive rubber, thermal construction age, thermal conductive coatings and other fields. Compared with metal filler, nano-alumina / nano-magnesia can not only improve the thermal conductivity, but also improve the insulation effect, and the mechanical properties of plastics can also be improved.

5. Improve the processability of plastics
Some polymers, such as ultra-high molecular weight polyethylene (UHMWPE) with viscosity average molecular weight of more than 150 minutes, have excellent comprehensive properties, but they are difficult to be formed and processed because of their high viscosity, which limits their popularization and application. Taking advantage of the low interlaminar friction coefficient of layered silicate sheet, the nano-rare earth / ultra-high molecular weight polyethylene composite was prepared by fully mixing UHMWPE with layered silicate, which can effectively reduce the entanglement of UHMWPE molecular chain and reduce the viscosity. Play a good role in lubrication, thus greatly improving its processability.

6. The addition of nanomaterials makes plastics functional.
Metal nanoparticles have heterogeneous nucleation, which can induce the formation of some crystal forms that give toughness to the materials. When polypropylene is filled with low melting point metal nanoparticles, it is found that it can play the role of conductive channel, strengthening and toughening in polypropylene, and its low melting point also improves the processability of the composites.
Aluminum oxide price
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Germany has begun talks with Senegal on gas extraction and LNG supplies. Mr. Scholz recently visited a solar farm in Dakar. He told a news conference that he was willing to work more closely with Senegal on renewable energy. Senegal's president told a news conference that his country was ready to supply liquefied natural gas to the European market.  

The global economy may be facing its greatest test since World War II amid the ongoing threats of COVID-19, the Conflict between Russia and Ukraine, heightened financial market volatility, and climate change, IMF Managing Director Kristina Georgieva warned in an article posted on the IMF's website.

Some 30 countries have imposed restrictions on trade in food, energy, and other key commodities since the outbreak of the Conflict, the article noted. That would raise trade barriers, disrupt global supply chains, drag down economic growth and undo years of economic gains. If countries let it go, the costs will be enormous and everyone will be affected.

The prices of many other commodities like the aluminum oxide are expected to increase in the future. Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) is a trusted global chemical material supplier & manufacturer with over 12-year-experience in providing super high-quality chemicals and Nanomaterials including graphite powder, 3D printing powder, the aluminum oxide, etc. If you are looking for high-quality materials, please feel free to contact us and send an inquiry.

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