[5] Prof. Yu Jeongsoo

Technology

Plastic Identification Technology Using Terahertz Waves
By analyzing the differences in transmittance and reflectance of terahertz waves on plastic molecules, it is possible to identify types of waste plastics based on their materials (e.g., PE, PP, PS, PET, bioplastics), distinguish black plastics, and detect plastics with added substances.

Plastic packaging identification experiment in progress

Strength

The ability to identify previously unrecognizable plastics in recycling processes such as “black plastics”, “additive mixed plastics” & “bioplastics” can significantly enhance the market value of recycled plastics.
Conventional identification technologies have difficulty detecting black plastics. When mixed plastics containing additives or flame retardants are included, the purity of the plastic decreases, significantly limiting its potential applications and reducing its market value.

Use Case

Message from the Lab

What I want to know

Tohoku University Green Future Creation Organization,
Graduate school of International Cultures,
Graduate school of Environmental Sciences, Professor

Prof. Yu Jeongsoo

The current state of plastic waste management in various countries, the associated social issues that arise, the market size of recycled plastics, and the level of environmental awareness among stakeholders (businesses, residents, governments, and the recycling industry).

Desired Candidate Profile

  • Individuals with a passion for addressing their country's plastic waste problems and associated social issues through precise plastic sorting, as well as those eager to enhance public environmental awareness.
  • Individuals particularly interested in policy proposals, with a vision and passion for making policy recommendations to address their country's waste issues in the future or integrating such proposals into business initiatives.
    Since waste management is a systemic issue at the national level, collaboration with policies is considered essential for fundamental solutions.

Reference