PostDoc in Mechanical Separation of Polymer Flakes

Delft University of Technology



The Faculty of Civil Engineering and Geosciences provides leading international research and education, with innovation and sustainability as central themes. Research and education are closely interwoven and address societal challenges. The Faculty consists of the departments of Engineering Structures, Materials, Mechanics, Management and Design, Transport and Planning, Geoscience and Engineering, Water Management, Hydraulic Engineering, and Geoscience and Remote Sensing.

The position is open in the group of Resources & Recycling. This group aims at developing breakthrough technologies in recycling by introducing advanced physics and innovative process concepts that allow for a circular use of materials such as plastics, metals or concrete. The group's research has led to a large number of spinouts, the largest of which now has over 200 employees.

The group is an an integral part of the Department of Engineering Structures of the Faculty of Civil Engineering and Geosciences of TU Delft. The Department of Engineering Structures’ research focus is placed on the investigation and development of resilient, smart and sustainable structures and infrastructures as well as on the structures for energy transition. The groups are using the Macromechanic Laboratory for full scale testing, monitoring and modelling of structures to facilitate implementation of innovations. The Department delivers a large number of courses both at the BSc and MSc level.

Job Description

In this challenging position you will cooperate with another postdoc to further develop a separation technique for plastics based on a new strategy, called "logarithmic sorting". The Resources and Recylcing group is developing this technique to separate complex mixtures of plastic flakes into pure polymer products. At the basis of this new concept is the interpretation of colour/NIR images of two-dimensional fields of flakes into the action of thousands of high-precision micro-droplet jets to manipulate the flakes into the correct product flows. The information from the flake field image is used both to identify the polymer properties and to predict the mechanical behaviour and interaction of the flakes, in order to arrive at high-value circular plastics. The other postdoc is focusing on the flake-droplet interaction. Part of the research results should be turned into course material (in English).

Job Requirements

We are looking for a motivated colleague with a professional academic and indepentent working attitude. The candidate is expected to have a doctorate in a field that has gained her/him experience with sensing and online image processing. Background in computational physics or data analysis is appreciated. Good communication skills in written and spoken English is a must and it is important that you have demonstrable experience with independent scientific writing and have good social skills.

Terms of Employment

TU Delft offers a customisable compensation package, a discount for health insurance and sport memberships, and a monthly work costs contribution. Flexible work schedules can be arranged. An International Children’s Centre offers childcare and an international primary school. Dual Career Services offers support to accompanying partners. Salary and benefits are in accordance with the Collective Labour Agreement for Dutch Universities.

Inform and Apply 

For more information about the content of this position, please contact Prof. dr. Peter Rem via To apply, please e-mail a detailed CV, list of publications, 1 page abstract of your PhD thesis (in English) and a letter of application in one single PDF entitled Lastname_CiTG19.21 by June 30 2019 to

When applying for this position, please refer to vacancy number CITG19.21

In your application, please refer to