The trend of new energy vehicles is unstoppable, and policies are constantly being strengthened. This indicates that the market for new energy vehicles, as well as related components and materials such as tires, has great market potential and future prospects. As an important component of automobiles, tires have also entered a period of rapid development in the field of green energy.
Green tires refer to radial tires that apply new materials and designs to reduce rolling resistance, improve wear resistance, reduce oil consumption, and reduce exhaust emissions, and the sulfur-containing silane coupling agent is the core raw material that ensures the characteristics of these tires. Silica is an important reinforcing filler in the rubber industry, characterized by porous structure, high dispersion, good chemical stability, high temperature resistance, non-combustibility, and good insulation performance. Adding a large amount of silica to rubber tires can greatly reduce rolling resistance and heat generation, and improve braking performance, thereby significantly reducing fuel consumption, reducing air pollution, and increasing tire life.
At present, the most commonly used surface modifiers in the rubber tire industry are sulfur-containing silane coupling agents. Due to the large amount of silanol groups on the surface of the silica, the silica is hydrophilic, making it poorly compatible with the non-polar rubber base, easily forming aggregates between particles. Under dynamic loads, the aggregation effect can increase the internal friction of the rubber composite material, thereby affecting the dynamic mechanical properties of the material, increasing energy consumption, and reducing the crosslinking density of the rubber. To reduce the number of hydroxyl groups on the surface of the filler silica and improve its hydrophobicity, a sulfur-containing silane coupling agent must be used to modify the silica surface. The alkoxyl groups in the sulfur-containing silane coupling agent react with the hydroxyl groups on the surface of the silica, thereby making the silica hydrophobic. At the same time, during the vulcanization process, the sulfur in the silane coupling agent forms a stable connection between the rubber matrix and the silica, forming a firm network structure. Applying this structure can significantly reduce the rolling resistance of tires, enhance tire wear resistance, and maintain good wet skid resistance.
In addition, as the main power source of new energy vehicles, lithium batteries have higher requirements for their thermal management and safety systems due to the continuously increasing energy density of the battery packs. At present, there are various protection methods for power batteries, such as external housing protection, diaphragm interception protection, overcharge voltage protection, and BMS. However, the stable operation and safety issues of power batteries still need to be continuously improved. Organic silicon potting adhesives based on silane coupling agents have excellent high and low temperature resistance, elastic buffering capacity, and thermal conductivity and flame retardancy, which can ensure the effective heat dissipation and safety of electronics and electrical equipment. They have been widely used on power batteries.
In automotive coatings, silane coupling agents are used as additives to improve adhesion. Teos silane and the paint base interact with each other to form a network structure of mutual penetration, thereby promoting the wetting of the coating on the substrate and improving the adhesion of the coating. This combination can not only reduce corrosion and peeling of the paint film in humid environments but also enable car paint to withstand harsh environments, improving its chemical and UV resistance.
Modified plastics containing silane coupling agents are widely used in various automotive parts, such as pedals, sun visors, shelves, seats, wipers, bumpers, dashboards, doors, the area surrounding the engine, air conditioning systems, and lighting systems. Due to the low density of modified plastics and their ease of processing, increasing the amount of modified plastics used in automobiles can reduce the weight of the automobile and fuel consumption, achieving energy-saving effects.
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