Dr.sc.ing. Juris Grīniņš


2016 - Doctor of science in engineering (Dr.sc.ing.), Chemical engineering science section. Riga Technical University, Faculty of Material Science and applied Chemistry. Doctoral thesis: “Improvement of the Properties of Birch Plywood with Thermo - Hydro Treatment Method”

Scientific interests and competence

Improvement of durability and water related properties of wood and wood materials using different modification techniques. Thermo - hydro treatment. Treatment with polymer resin solutions. Water resistant board materials from wood processing residues.

The most important projects

Commercialization project  “Commercialization of  technology of plywood thermal modification” No. KC-PI-2020/41 (2020-2022) - Project manager Latvian Council of Science Fundamental and Applied Research Project  “Chemical modification of phenol-formaldehyde resins for use as novel wood treatment agent” No. lzp-2020/2-0422 (2020-2021) - Project manager Postdoctoral research project "Improvement of the properties of birch plywood using impregnation with polymer resins”. Nr., agreement Nr. (2018-2020) - Project manager European Regional Development Fund (ERDF) project „Biorefinery concept for birch bark processing into value added green products and materials”. Nr. (2016-2017) - Researcher Forest sector competence center project "Modification of birch plywood”. Nr. 0135/KC/16/10 (2016-2018) - Researcher ERDF  project „Plywood from thermally modified veneer with improved durability properties”. Nr. 2014/0018/ 2DP/ (2014-2015) - Engineer ERDF project „Innovative wood and its processing materials with upgraded service properties”. Nr. 2010/0324/2DP/ (2011-2013) - Scientiffic assistant

The most important publications

Grinins J., Biziks V., Marais B.N., Rizikovs J., Militz H.  Weathering stability and durability of birch plywood modified with different molecular weight phenol-formaldehyde oligomers. Polymers, 2021, 13(2), 175, 1–18. Grinins J., Biziks V., Rizikovs J., Irbe I., Militz H. Evaluation of water related properties of birch wood products modified with different molecular weight phenol-formaldehyde oligomers. Holzforschung, 2021, 75(10), 908-916. Grinins J., Biziks V., Irbe I.,Rizikovs J. Water related properties of birch wood modified with phenol-formaldehyde (PF) resins. Key engineering materials, 2019, 800, 246-250. Biziks, V., Van Acker, J., Militz, H., Grinins, J., Van den Bulcke, J. Density and density profile changes in birch and spruce caused by thermo-hydro treatment measured by X-ray computed tomography. Wood Science and Technology, 2019, 53(2), 491–504. Irbe I., Grinins J., Andersone I., Andersons B. Susceptibility of thermo-hydro-treated birch plywood to mould and blue stain fungi. Wood Material Science and Engineering, 2017, 13(5), 296-304. Grinins J., Andersons B., Irbe I., Andersone I., Meija-Feldmane A., Janberga A., Pavlovics G., Sansonetti E. Thermo-hydro treated (THT) birch veneers for plywood production with improved properties. Holzforschung, 2016, 70(8), 739-746. Grinins J., Irbe I., Andersons B., Andersone I., Meija-Feldmane A., Janberga A., Pavlovics G., Sansonetti E. Thermo-hydro treated (THT) birch plywood with improved service properties. International Wood Products Journal, 2016, 7(4), 181-187. Biziks V., Van Den Bulcke J., Grinins J., Militz H., Andersons B., Andersone I., Dhaene J., Van Acker J. Assessment of wood microstructural changes after one-stage thermo-hydro treatment (THT) by micro X-ray computed tomography. Holzforschung, 2016, 70 (2), 167 – 177. Biziks V., Andersons B., Sansonetti E., Andersone I., Militz H., Grinins J.  One stage thermo-hydro treatment (THT) of hardwoods: An analysis of form stability after five soaking-drying cycles. Holzforschung, 2015, 69 (5), 563 – 571. Grinins J., Andersons B., Biziks V., Andersone I., Dobele G.  Analytical pyrolysis as an instrument to study the chemical transformations of hydrothermally modified wood. Journal of Analytical and Applied Pyrolysis, 2013, 103, 36-41.