Nano-Cerium Oxide Improves six Properties of Polymers

1. Improve the UV aging resistance of polymers

The nanometer cerium oxide CeO2 produced by our company has good chemical stability, thermal stability, non-migration, and higher safety performance. What's more important is that it has strong ultraviolet absorption performance, has a shielding effect on UVA and UVB ultraviolet rays, and has a high visible light transmittance. If added to cosmetics (sunscreen agent), it will not affect the appearance of cosmetics.

The 4f electronic structure of nanometer cerium oxide CeO2 is very sensitive to light absorption, and most of the absorption bands are in the ultraviolet region (200~400mn). It has no characteristic absorption of visible light and has good transmittance. Ordinary ultra-fine CeO2 has long been used in the glass industry for ultraviolet absorption. CeO2 ultrafine powder with a particle size less than 100nm has better UV absorption and shielding effects. It can be used in sunscreen fibers, automotive glass, coatings, cosmetics, films, plastics, fabrics, and other applications and outdoor-exposed products to improve weather resistance, especially Products with higher transparency requirements, such as transparent plastics and varnishes, have significant advantages.

2. Improve the anti-corrosion properties of polymers

The introduction of nano-inorganic materials can effectively improve the anti-corrosion performance and low-toxic or non-toxic environmental protection requirements of coatings, and achieve long-lasting functions. Combined with the development trend of coatings and expanding the application scope of rare earths, the special properties of nano-rare earth materials will improve the traditional performance of coatings, and the development of functional organic coatings plays a role in promoting this.

3. Improve the mechanical properties of polymers

With the increasing industrial requirements for the mechanical properties of polymers, there are more and more studies and applications of polymer/nanocomposite materials using inorganic nanoparticles as mechanical enhancers. Therefore, the application of filling nano CeO2 into polymer materials is increasing. More and more. Experiments show that by incorporating a small amount of nanometer cerium oxide CeO2 (<iwt%), the mechanical properties of the polyimide film composited with ceo2 can be improved while maintaining good elastic properties.

Fourth, improve the thermal stability of polymers

Due to the special outer electronic structure of rare earth oxides, rare earth oxides including CeO2 will actively affect the thermal stability of many polymers, such as PP, PI, PS, nylon, epoxy resin, and SBR. All can be improved by adding rare earth compounds. When studying the preparation conditions, it was found that with the increase of nano-CeO2, the molecular weight of the composite material first increased and then decreased, the glass transition temperature and the apparent viscosity of the melt increased, and the thermal stability was greatly improved.

5. Improve the conductive properties of polymers

Through in-situ polymerization and doping with hydrochloric acid, a series of polyaniline/nano-CeO2 composite materials with different molar ratios were prepared. After preparing polyaniline/CeO2 nanocomposite particles with a core-shell structure, it was found that the conductivity of the composite particles increased with the increase in the molar ratio of polyaniline/CeO2, and the degree of protonation reached approximately 48.52%. Nano-cerium oxide CeO2 is also helpful for other conductive polymers. CeO2/polypyrrole composites are used as electronic materials. Nano-cerium oxide CeO2 is incorporated into vinylidene fluoride-hexafluoropropylene copolymer to prepare excellent ionic Conductivity of lithium-ion electrode materials.

6. Cerium oxide polymer composites as catalytic materials

Nano-CeO2 also has a high catalytic effect on the synthesis of many organic compounds. Nano-CeO2 is loaded on poly-4-vinylpyridine to obtain nano-CeO2/poly-4-vinylpyridine composite particles, which are used to catalyze the synthesis of 3, 4-Dihydropyrimidin-2-one and its derivatives. It also has higher activity after being loaded on the polymer.