Durable Epoxy@ZnO Coating for Improvement of Hydrophobicity and Color Stability of Wood
Durable Epoxy@ZnO Coating for Improvement of Hydrophobicity and Color Stability of Wood
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DOI：
10.3390/polym11091388
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发表时间：
2019-08
期刊：
影响因子：
5
通讯作者：
Vu Manh Tuong;Nguyen Van Huyen;Nguyen Trong Kien;N. V. Dien
中科院分区：
文献类型：
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作者：
Vu Manh Tuong;Nguyen Van Huyen;Nguyen Trong Kien;N. V. Dien
木材的疏水性和颜色稳定性是重要的性能，当木材用作户外产品的原材料时，很容易发生变化，降低木材的使用寿命。采用两步喷涂法对越南安息香木材进行环氧@ZnO涂层处理，以提高其憎水性和颜色稳定性。评价了涂层的疏水性、坚固性以及未涂覆的木材样品和环氧@ZnO涂覆的木材样品的颜色稳定性。采用场发射扫描电子显微镜（FESEM）和X射线衍射（XRD）分析了涂层的微观形貌和晶体结构。结果表明，环氧@ZnO涂层不仅具有超疏水性，平均水接触角为154.1°，而且在5次水喷射试验后仍保持超疏水性，平均水接触角为149.6°。与未涂覆的木材样品相比，涂覆的木材样品的颜色稳定性提高了约50%。此外，连续环氧@ZnO涂层与层次微/纳米结构的ZnO微米/纳米粒子的纤锌矿六方结构构建在木材表面上被证实。
The hydrophobicity and color stability of wood are important properties that can be easily changed when wood is used as a raw material for outdoor products, reducing the service life of wood. Herein, an epoxy@ZnO coating was applied by a two-step simple spray coating method to improve the hydrophobicity and color stability of Styrax tonkinensis wood. The hydrophobicity, robustness of coating, as well as the color stability of uncoated wood samples and epoxy@ZnO coated wood samples were evaluated. The microstructure morphology and crystal structures of the coating were also characterized by a field-emission scanning electron microscope (FESEM) and X-ray diffraction (XRD) analysis, respectively. Results showed that the obtained epoxy@ZnO coating was not only superhydrophobic with an average water contact angle of 154.1°, but also maintained superhydrophobicity with an average water contact angle of 149.6° after five water jetting tests. The color stability of the coated wood samples was improved by around 50% compared to that of uncoated wood samples. Additionally, a continuous epoxy@ZnO coating with hierarchical micro/nanoscale structures constructed by the wurtzite hexagonal structure of ZnO micro/nanoparticles on wood surfaces was confirmed.