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Modification of Poplar Wood via Polyethylene Glycol Impregnation Coupled with Compression
| Content Provider | MDPI |
|---|---|
| Author | Liu, Yuhan Shi, Jiangtao Leng, Weiqi Huang, Qiongtao |
| Copyright Year | 2022 |
| Description | Wood permeability and compressibility are affected by cell wall structure and chemical composition. These properties can be improved by appropriate wood pretreatments. Low-density poplar wood was converted to a more dense structure by the following steps: First, lignin and hemicellulose were removed using a mixture of NaOH and $Na_{2}SO_{3}$. Second they were impregnated with polyethylene glycol (PEG, mean molecular weight of 1200), $nano-SiO_{2,}$ and a silane coupling agent at atmospheric temperature and pressure. Finally, impregnated wood was compressed at 150 °C. Results showed that the tracheid lumens on the transverse section of the compressed wood almost vanished. Specifically, the lumens in the wood cells, especially those that were compressed, were almost completely filled with PEG. In FTIR, the asymmetric absorption peaks of Si–O–Si at 1078–1076 $cm^{−1}$ were clearly observed, which confirms the existence of bonding between $nano-SiO_{2}$ and wood. The highest melting enthalpy and crystallization enthalpy showed a heat storage capacity of modified wood, which were 20.7 and 9.8 J/g, respectively. Such phase change capabilities may have potential applications in regulating the rate of change of room temperature. In summary, the modified wood could be utilized as material for construction to conserve energy. |
| Starting Page | 1204 |
| e-ISSN | 19994907 |
| DOI | 10.3390/f13081204 |
| Journal | Forests |
| Issue Number | 8 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-07-31 |
| Access Restriction | Open |
| Subject Keyword | Forests Paper and Wood Fast-growing Poplar Wood Wood Modification Densified Wood Peg-treated Wood |
| Content Type | Text |
| Resource Type | Article |
