dr. L. Chu (Liangyong)

After finishing BSc and MSc in the China University of Petroleum (2013), I came to the Delft University of Technology for a Ph.D. in physical chemistry of interfaces. Currently, I am working as a postdoc researcher in Surface Technology & Tribology group and Production Technology group in the University of Twente, working on tuning the interaction between a metal surface and fiber-reinforced thermoplastic composites.

Engineering & Materials Science

# Maleic Anhydride
# Membranes
# Polyelectrolytes
# Polymers
# Thermoplastics

Chemistry

# Polymer Morphology
# Surface

Physics & Astronomy

# Anhydrides

With my expertise in physical chemistry at surface and interfaces:

1. Interfacial physics

Van der Waals forces, capillary forces, critical Casimir forces, stick-slip behaviour.

2. Surface modification

Surface chemical modification using wet-chemistry methods, plasma treatment, and transfer method.

3. Surface & interface characterizations and direct force measurement using Atom Force Microscopy (AFM)

Surface morphology characterization of various materials, including graphene, hydrogel, polyelectrolyte thin films, membranes, nanoparticles.
Interfacial adhesion force measurements.
Nano-friction measurements (Lubrications and fundamentals of friction) using Lateral mode AFM.
Long-range interfacial force (double layer forces, critical Casimir forces) measurements using colloidal probe AFM.
Nanoindentation measurement on the soft matter using AFM.
Surface composition analysis based on AFM phase image.

6. Material analysis based on Raman spectroscopy

Crystallization of thermoplastics polymers, structure analysis of carbon-based materials

7. Surface chemical analysis using X-ray photoelectron spectroscopy (XPS).

my research interest is to tune the interfacial interaction using surface physical chemical approaches. This covers a veriety of scientific topics and applications:

eletrostatic adhesion
metal polymer interaction, including reducing adhesion e.g. for releasing of polymer part from the metallic mold. and improve adhesion e.g. metal polymer joints.
fiber polymer interaction by modification of fiber and tuning the polymer interphase
Tunable interaction in liquid conditions, for biomechanical purposes and membrance sciences.

Please contact me for a connection if my expertise/interests fit yours.

Marinosci, V. M. , Helthuis, N. G. J. , Chu, L. , Grouve, W. J. B. , Rooij, M. B. D. , Wijskamp, S. , & Akkerman, R. (2022). The role of process induced polymer morphology on the fracture toughness of titanium-PEKK interfaces. Engineering fracture mechanics, 268, [108475]. https://doi.org/10.1016/j.engfracmech.2022.108475

Feng, W. , Chu, L. , de Rooij, M. B., Liu, D., & Broer, D. J. (2021). Photoswitching between Water-Tolerant Adhesion and Swift Release by Inverting Liquid Crystal Fingerprint Topography. Advanced science, 8(8), [2004051]. https://doi.org/10.1002/advs.202004051

Chu, L. , Grouve, W. J. B. , van Drongelen, M. , de Vries, E. G. , Akkerman, R. , & de Rooij, M. B. (2021). Formation of Flat-on Lamellar Crystals in Absence of Nanoconfinement. Advanced materials interfaces, 8(7), [2001894]. https://doi.org/10.1002/admi.202001894

Chu, L. , Grouve, W. J. B. , van Drongelen, M. , Guha, Y. , de Vries, E. G. , Akkerman, R. , & de Rooij, M. B. (2021). Influence of the Polymer Interphase Structure on the Interaction between Metal and Semicrystalline Thermoplastics. Advanced engineering materials, 23(2), [2000518]. https://doi.org/10.1002/adem.202000518

Borgul, P., Rudnicki, K. , Chu, L., Leniart, A., Skrzypek, S., Sudhölter, E. J. R., & Poltorak, L. (2020). Layer-by-layer (LbL) assembly of polyelectrolytes at the surface of a fiberglass membrane used as a support of the polarized liquid–liquid interface. Electrochimica acta, 363, [137215]. https://doi.org/10.1016/j.electacta.2020.137215

Paltrinieri, L., Remmen, K., Muller, B. , Chu, L., Koser, J., Wintgens, T. , Wessling, M., de Smet, L. C. P. M., & Sudhölter, E. J. R. (2019). Improved phosphoric acid recovery from sewage sludge ash using layer-by-layer modified membranes. Journal of membrane science, 587, [117162]. https://doi.org/10.1016/j.memsci.2019.06.002

Chu, L., Bus, M., Korobko, A. V., & Besseling, N. A. M. (2019). Calibrating lateral displacement sensitivity of AFM by stick-slip on stiff, amorphous surfaces. Ultramicroscopy, 205, 1-4. https://doi.org/10.1016/j.ultramic.2019.05.012

Amirilargani, M. , Merlet, R. B. , Chu, L. , Nijmeijer, A. , Winnubst, L., de Smet, L. C. P. M. , & Sudhölter, E. J. R. (2019). Molecular separation using poly (styrene-co-maleic anhydride) grafted to Γ-alumina: Surface versus pore modification. Journal of membrane science, 582, 298-306. https://doi.org/10.1016/j.memsci.2019.04.013

View my profile

2018-6 to now Postdoc, University of Twente

Tool surface design for releasability of thermoplastic composites

2017.9 to 2018.4 Postdoc, Delft University of Technology

Optimization of nano-carbon materials and polymer interface

2013.9 to 2017.9 Ph.D., Delft University of Technology

Interfacial forces measurements using Atomic Force Microscopy

2010.9 to 2013.7 MSc, China University of Petroleum

Fabrication of carbon-based fillers/poly (vinylidene fluoride) composites with high dielectric properties

2006.9 to 2010.7 BSc, China University of Petroleum

Molecular Dynamics simulation of Graphene/Silicon Nanowires composites

Courses in the current academic year are added at the moment they are finalised in the Osiris system. Therefore it is possible that the list is not yet complete for the whole academic year.