We are pleased to announce a new, online edition of the NICAS colloquium on Thursday 7 July 2022 from 12.00 to 13.00 hrs. The colloquium will take place online through Microsoft Teams.
Throughout the year, NICAS organises a bi-weekly Colloquium consisting of two short research lectures. It provides researchers with the opportunity to present ideas for, updates on or results of their activities. The NICAS Colloquium allows people to stay informed on a regular basis about the latest developments and results of research and to exchange information and expertise.
The chair of this colloquium is Jorien Duivenvoorden (Rijksmuseum)
The presenter is:
► Jonas Veenhoven – Differentiation between primary and secondary pyrolysis reactions to improve the identification of Asian lacquer macromolecules
The analysis of polymerised Asian lacquers is challenging due to the complex cross-linked matrices. Pyrolysis hyphenated with gas chromatography-mass spectrometry (Py-GC-MS) is suitable for the analysis of Asian lacquers and relies on the introduction of solid samples and online thermal decomposition of the lacquer polymer into small molecules amenable to GC-MS.
In this contribution the stepwise application of progressive flash pyrolysis temperatures, ranging between 300-700 °C, is presented as a useful approach to differentiate between primary pyrolysis reactions and secondary dehydration products. This optimisation has shown to improve the characterisation of the polymeric compositions of Asian lacquers and to distinguish between the different, intermolecular covalent bonds.
Jonas Veenhoven is a joint PhD student at Ghent University, the University of Amsterdam and the KIK-IRPA, the Royal institute for cultural heritage in Brussels Belgium. He focusses on the molecular characterisation of Asian lacquer natural polymers and the evaluation of cleaning approaches on those polymers using chromatography and mass spectrometry.