Annual Polymer Day 2022

Annual Polymer Day 2022

We would like to invite you to our Annual Polymer Day 2022:

Friday 30 September from 13.00-16 at DTU Chemical Engineering in Lyngby.

It will be an afternoon event with presentations of the most recent research from the Danish Polymer Centre (DPC) at DTU Chemical Engineering as well as provide opportunity to network and discuss polymer science through a late afternoon poster session.

Professor Herbert Shea from EPFL will give this year’s International research presentation on the topic of flexible polymer-based actuators

The event will be possible to attend physically as well as in a hybrid format, where we will make at least the presentations available for streaming. The poster and networking session will only be accessible for physical attendees.

Please reserve the day and register through Conference Manager (link). When you register, please indicate if you plan to attend physically or through the on-line system. 

 

Program:

13:00-13:10: Welcome by Professor Anne Ladegaard Skov

13:10-13:45: Professor Herbert Shea: “Soft electrostatic actuators for wearable robotics”.(Link to Professor Herbert Shea abstract)

13:45-14:30: Research presentations by group 2, Postdoc

13:45-14:00: Magdalena Skowyra: A modular approach to building polymer-based durable plugs

14:00-14:15: Kyriaki Gkaliou: Thermo-chemical recycling of mixed plastic wastes

14:15-14:30: Alena Jurásková: Reversible dynamic behavior of condensation cured silicone elastomers

14:30-14:40: Short break

14:40-15:55: Research presentations by PhD students

14:40-14:55: Karolis Norinkevicius: Synthesis of self-assembling amphiphilic block copolymer materials

14:55-15:10: Zhaoqing Kang: Transparent PDMS fiber actuator with ionic liquid-based electrodes

15:10-15:25: Arianna Rech:Thermoprocessable recyclable biopolymer-based composites from sodium alginate

15:25-15:40: Harald Silau: Lignin, a bio-based aromatic building block enabled through functionalization

15:40-15:55: Frederik Grønborg: Compounding of Smart Materials

15:55-16:00: Closing remarks and conclusion of online part

16:00-??:      Poster session and networking with refreshments



Presentations from Postdocs and PhD 
students, titles and mini abstracts:

 

A modular approach to building polymer-based durable plug

Magdalena Skowyra1

A.L. Skov1, C.H. Frederiksen2, Y.D. Ivanova2, C.N. Larsen2

1Danish Polymer Centre, Chemical and Biochemical Engineering, DTU
2Danish Offshore Technology Centre, DTU

The oil well abandonment process involves a plugging step, which can be severely challenged by unconsolidated formations, high temperatures, and formation permeability. A new, greener solution to currently used techniques is proposed, consisting of a polymer-based plug that has low gas and water permeability, long-term durability, and the capability of autonomous setting when there is flow and rough surface. The plug is formed by the condensation of functionalized polymer microspheres through covalent bonds into a rigid solid that can permanently plug an oil well and withstand its extreme conditions for an extended period of time. 

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Thermo-chemical recycling of mixed plastic wastes

Kyriaki Gkaliou1

Zsuzsa Sarossy2, Lidia Benedini2, Anders E. Daugaard1

1Danish Polymer Centre, Chemical and Biochemical Engineering, DTU
2Chemical and Biochemical Engineering, DTU

While recycling has been recognized as the preferred sustainable waste management solution, plastic waste recycling is often more complicated, especially when targeting heterogeneous or multilayered plastics used, for instance, for packaging. The purity of plastic waste is the primary factor for the quality and economic value of recyclates, acting as technical and market barriers to substituting virgin plastic. Pyrolysis is a facile recycling technology in which plastic waste is decomposed thermochemically at elevated temperatures in the absence of oxygen. To meet the same quality standards as the virgin feedstock, it is necessary to sort mixed plastic waste and purify the pyrolysis output. However, these purification processes add a non-environmental impact due to the high volume of the organic solvents. Therefore, this study investigates the pyrolysis of highly mixed plastics and the methodology for a scalable polymerization of the liquid fraction with the perspective of producing recycled plastics with sufficient purity.

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Reversible dynamic behavior of condensation cured silicone elastomers

Alena Jurásková1, 2

Stefan Møller Olsen1, Anne Ladegaard Skov2

1Hempel A/S, Lundtoftegårdsvej 91, 2800 Kgs. Lyngby, Denmark
2Danish Polymer Centre, Chemical and Biochemical Engineering, DTU

Dibutyltin-dilaurate (DBTL), commonly used to catalyze condensation cured silicone elastomers is shown to cause dynamic behavior of the silicone network. The dynamic behavior of the elastomer has a significant effect on the elastomer stress-strain behavior, increasing the elastomer ultimate strain significantly. We attribute such behavior to the catalyst being able to integrate into the elastomer network. Furthermore, we show that a reaction of silanol-terminated polydimethylsiloxane (HO-PDMS-OH) with DBTL can lead to a gelation of the system without presence of cross-linker. This is, to our best knowledge, the first time, it is shown that the catalyst has, apart from catalytic effect, the ability to act as a cross-linker.

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Synthesis of self-assembling amphiphilic block copolymer materials

Karolis Norinkevicius1 

Jeppe Madsen1, Sebastian meier2, Radosław Górecki4 Torsten H. B. Regueira3, Anders E. Daugaard1

1Department of Chemical and Biochemical Engineering, Technical University of Denmark, Søltofts Plads 227, 2800 Kongens Lyngby, Denmark – Email: karono@kt.dtu.dk

2Department of Chemistry, Technical University of Denmark, Kemitorvet 207, 2800 Kongens Lyngby, Denmark – Email: semei@kemi.dtu.dk

3Deep Tech Center, Aquaporin A/S, Nymøllevej 78, 2800 Kongens Lyngby, Denmark – Email: tba@aquaporin.dk

4Nanostructured Polymeric Membrane Laboratory, King Abdullah University of Science and Technology, Thuwal 23955-6900, 4700, Kingdom of Saudi Arabia – Email: radoslaw.gorecki@kaust.edu.sa

Amphiphilic block copolymer materials have attracted much attention in nanotechnology for the past decade. One can form different morphologies (micelles, vesicles, or rods) in aqueous media by controlling the balance between the hydrophilic and hydrophobic blocks. Applications are found in the encapsulation of drugs or vitamins for stabilization and delivery purposes, while they also act as templates for patterning on a nanometer scale. Poly(ethylene glycol) (PEG) is one of the most frequently used hydrophilic blocks. As a result, we have investigated a series of block copolymers based on PEG and poly(caprolactone) prepared by employing two different catalysts in a ring-opening polymerization technique. The catalysts of choice were tin (II) 2-ethylhexanoate and a lipase B from Candida Antarctica. These were compared in terms of their polymerization kinetics as part of time-resolved 13C NMR measurements. The final materials were evaluated for their self-assembling capabilities using cryogenic transmission electron microscopy (Cryo-TEM).

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Transparent PDMS fiber actuator with ionic liquid-based electrodes

Zhaoqing Kang1,2

Liyun Yu1; Yi Nie2, Anne Ladegaard Skov1

1Danish Polymer Centre, Chemical and Biochemical Engineering, DTU
2
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China,

A transparent PDMS fiber dielectric actuator with ionic liquid as core electrode and ionogel as outer electrical sheath is reported in this work. The fiber actuator has a transparency of 91% in the visible light spectrum. It presents a large linear strain of 9 %, and repeatable and stable linear deformation over multiple cyclic actuation tests. Furthermore, the fiber actuator can be assembled into bundles to give a strong force. This work provides a simple pathway for creating active soft matter with complex architectures in invisible and soft robots.

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Thermoprocessable recyclable biopolymer-based composites from sodium alginate

Arianna Rech1

Paul Nicholas2, Anders E. Daugaard1

1Danish Polymer Centre, Chemical and Biochemical Engineering, DTU
2
CITA, Centre for Information Technology and Architecture, Institute of Architecture and Technology, Royal Danish Academy - Architecture, Design, Copenhagen, Denmark

Plastic pollution is a growing threat to the sustainability of our planet. It is, therefore, essential and urgent to find more sustainable sources for plastic production, either by improving the recycling of waste or by introducing new bio-based sources. This study investigated the formulation of a thermoprocessable and recyclable biopolymer-based composite. The plastic matrix was developed by making sodium alginate, a biopolymer extracted from algae without thermoplastic properties, thermoprocessable through the combined use of a temporary plasticizer (water) and a permanent plasticizer (glycerol). Fillers from algae biomass and biomass waste side-streams from the food industry were used to exploit the possibility of producing composites where the amount of pristine material used is reduced, decreasing the consumption of new resources and promoting the reuse of industrial waste streams. Lastly, the developed materials showed to be recyclable for multiple cycles without affecting the mechanical properties.

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Lignin, a bio-based aromatic building block enabled through functionalization

Harald Silau1,2

Alicia G. Garcia1, John M. Woodley3; Kim Dam-Johansen1, Anders E. Daugaard2

1CoaST, 2DPC, 3Prosys, Department of Chemical and Biochemical Engineering
Technical University of Denmark, 2800 Kgs. Lyngby, Denmark

Aromatic fossil-based raw materials are widely used in various applications due to their low cost and availability, contributing to excellent chemical properties in applications such as PET bottles or heavy-duty coatings for marine vessels. In the context of a green transition, bio-based alternatives are highly desired. Due to its aromatic structure and renewability, Lignin is an exciting candidate for replacing these building blocks. Lignin is a by-product of the pulp and paper industry, and currently, only 2% of the annual production (50 mil. tons) is being utilized for purposes other than incineration. The challenges of lignin valorization lie in the complex and highly hyper-branched chemical structure resulting in poor solubility and compatibility. These challenges can be addressed through various chemical modifications, allowing for better lignin utilization to substitute fossil-based raw materials in multiple applications contributing to the green transition.

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Compounding of Smart Materials

Frederik Grønborg2

Tiberiu Gabriel Zsurzsan1, Anders Egede Daugaard3, Jon Spangenberg2, David Bue Pedersen2

1Department of Electrical and Photonics Engineering; 2Department of Civil and Mechanical Engineering; 3Danish Polymer Center, Department of Chemical Engineering, DTU

The development of thermoplastic polymer blends has been researched for many years, and much effort has been put into optimised morphologies with selectively localised filler positions. The literature has mainly focused on small-scale lab experiments with small batch sizes that are hard to scale up. This work aims to produce materials for, among other applications, sensors by combining known methods with easier-to-scale twin-screw lab extruders with production rates of around 3 kg/h.  The investigation has looked at the effects of conductive carbon black filler loading and sensor geometry on the output of strain and flexural sensors.

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Poster presentations:

 

Solvent-free silicone-based elastomers with self-healing capabilities by supramolecular interactions

George Stiubianu1

Bianca Iulia Ciobotaru1, Mihaela Dascalu1, Bele Adrian1, Vasile Tiron2

1Department of Inorganic Polymers, Institute of Macromolecular Chemistry “Petru Poni” Iasi

2 Research Center on Advanced Materials and Technologies, Department of Exact and Natural Sciences, Institute of Interdisciplinary Research, Alexandru Ioan Cuza University of Iasi, Romania

By combining polymers functionalized with amino and carboxyl groups, respectively, self-healing elastomers based on polydimethylsiloxane have been created in an easy-to-use manner. The obtained free-standing films are soft (Young modulus ~0.1 MPa) and physiologically compatible materials. The mechanical properties of the materials are fully recovered after the samples are cut in half and the pieces are brought into contact at room temperature.

Fabrication of photocurable PDMS fiber for dielectric elastomer linear actuator

Liyun Yu1

Zhaoqing Kang1,2, Yi Nie2, Anne Ladegaard Skov1

1Danish Polymer Centre, Chemical and Biochemical Engineering, DTU
2
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, China

Dielectric elastomers (DEs) show great potential for actuator applications. Varying configurations for DE actuators (DEAs) have been studied, e.g. planar, tube, roll, extender, diaphragm and bender. Tube DEA consists of a cylindrical DE tube with two compliant electrodes on internal and external surfaces. Fiber DEAs include bundles of tube DEAs, producing a strong actuation force.

PDMS fiber is prepared via wet spinning by photocurable thiol-ene reaction. The morphology of fiber is adjusted by varying stoichiometry, UV irradiation time and flow rate of PDMS layer and internal ethanol solvent at spinning. The developed fiber with 463µm external diameter and 78µm thickness shows enhanced tensile properties of 552% strain at break and 0.62MPa tensile strength compared to planar film (91% strain at break and 0.13MPa tensile strength). The fiber DEA exhibits larger and repeatable linear deformation in multiple cyclic actuation. This work provides wider avenues for complex architectures enable fast DEA applications.

Preparation of artificial skin membrane with sweating capabilities for realistic measurements of ex-vivo transdermal drug delivery

Sofie Eriksen

Anne Ladegaard Skov

Danish Polymer Center, DTU

This project will focus on creating an artificial skin for testing transdermal drug delivery. The project consists of three main challenges: mimicking permeability of human skin, mimicking sweat ducts, and mimicking hair follicles. The first step will be determining the permeability of materials to find suitable materials for the skin layers. Different materials have been investigated in order to mimic skin permeability. Furthermore, filler molecules from the lipid matrix of skin was added for better resemblance. It was found that a membrane made of PMMA with ceramide, cholesterol, and linolic acid as additives resembled the permeability of skin. 

Process optimisation of PA11 in fiber-laser powder-bed fusion through loading of an optical absorber

Christian Leslie Budden

Anders E. Daugaard, David Bue Pedersen

Investigation on different catalytic materials in two-stage fixed-bed LDPE pyrolysis.

Wenhao Hu

Anders E. Daugaard, Anker D. Jensen, Zsuzsa Sárossy, Peter A. Jensen

Bio-based polymers as a source of raw material – New functional and recyclable polymers

Grammatiki Terzi

Anders Egede Daugaard, Peter Jeppe Madsen

 

IDA Polymer & Danish Polymer Centre at DTU-Chemical Engineering