| Revista: | Maderas : ciencia y tecnología |
| Base de datos: | |
| Número de sistema: | 000534471 |
| ISSN: | 0718-221X |
| Autores: | Zhang, Jun1 Liu, Bowen1 Zhou, Yunxia1 Essawy, Hisham3 Li, Jinxin1 Chen, Qian2 Zhou, Xiaojian1 Du, Guanben1 |
| Instituciones: | 1Southwest Forestry University Yunnan Key Laboratory of Wood Adhesives and Glued Products, Kunming. China 2Southwest Forestry University Key Laboratory of State forestry and Grassand Administration on highly efficient utilisation of forestry biomass resources in Southwest of China, Kunming. China 3National Research Centre Department of Polymers and Pigments, Dokki Cairo. Egypt |
| Año: | 2021 |
| Volumen: | 23 |
| País: | Chile |
| Idioma: | Inglés |
| Resumen en inglés | In this study, an easily prepared bio-based abrasive grinding wheel based on tannin-glyoxal-urea (TGU)thermosetting matrix is presented.The synthesised resin was prepared via co-polycondensation reaction of glyoxal and ureawith condensed tannin, which is a forest-derived product. Fourier transform infrared spectroscopy and electrospray ionisation mass spectrometry results confirmed that urea and glyoxal react well under acidic conditions and that -(OH)CH-NH-group is primarily involved in TGU cross-linking. Differential scanning calorimetry, thermomechanical analysis and thermogravimetric analysis investigations showed that the preparation of TGU resin is easier compared to commercial phenol-formaldehyde (PF) resin; moreover, TGU resin has a more robust chemical network structure, which contributes efficiently to heat resistance and improved mechanical properties. This observation is supported by Brinell hardness, compression resistance and grinding testing; these showed that the new grinding wheel acquired higher hardness, superior resistance against compression and stronger abrasion resistance compared with a PF-based grinding wheel prepared in the laboratory. Moreover, few holes and no cracks were found in the new grinding wheel. |
| Keyword: | Bark, Bio-based resin, Glyoxal, Grinding wheel, Mimosa, Tannin, Urea. |
| Texto completo: | Texto completo (Ver HTML) Texto completo (Ver PDF) |
