Testing Helium Barrier Performance of Graphene

Graphene has garnered significant attention due to its exceptional properties. Among these, its barrier properties, or the ability to prevent the passage of gases, are of particular interest for applications in various fields, including packaging, microelectronics, and gas separation. This article focuses on the methods used to test the helium barrier performance of graphene.

Helium serves as an ideal probe for evaluating the barrier properties of materials. Its small atomic size allows it to permeate through even the smallest defects or pores in a material. Therefore, testing with helium provides a stringent assessment of a material's barrier effectiveness. Furthermore, helium has important applications in various industries, including aerospace, cryogenics, and leak detection, making its containment crucial.

Several methods exist for measuring gas permeability, but the pressure difference method is widely used, especially for testing a broader range of gases. This method is based on monitoring the pressure change in a low-pressure chamber after a gas permeates through a sample. The helium gas, driven by the pressure difference between the two chambers, permeates through the graphene. The pressure rise in the low-pressure chamber is measured and used to determine the permeation rate.

 Labthink VAC-V2 is based on the differential pressure method, and is professionally applicable to the determination of gas transmission rate as well as solubility coefficient, diffusion coefficient and permeability coefficient of plastic films, composite films, high barrier materials, sheeting and aluminum foils.

Testing the helium barrier performance of graphene using the pressure difference method is essential for evaluating its suitability for various applications. This method provides accurate and reliable data on helium permeation rates, enabling researchers and engineers to optimize graphene-based materials for specific applications requiring high gas barrier properties. Further research and development in this area will undoubtedly unlock the full potential of graphene in diverse fields.

As the demand for functional materials grows, testing methods are evolving to ensure a more comprehensive evaluation of materials. Labthink encourages collaboration with companies for quality control! Visit the website www.labthink.com to learn more!