Wood Composites with Wettability Patterns Prepared by Controlled and Selective Chemical Modification of a Three-Dimensional Wood Scaffold,ACS Sustainable Chemistry & Engineering

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Wood Composites with Wettability Patterns Prepared by Controlled and Selective Chemical Modification of a Three-Dimensional Wood Scaffold
ACS Sustainable Chemistry & Engineering ( IF 7.1 ) Pub Date : 2017-11-07 00:00:00 , DOI: 10.1021/acssuschemeng.7b03104
Yaru Wang _{1,

2} , Tian Tian ₃ , Etienne Cabane _{1,

2}

Affiliation

Wood-composite materials with patterned wetting properties were synthesized by applying hydrothermal growth of ZnO rods into a wood scaffold. We exploited the natural morphological features of wood, to selectively modify the wood material via a self-directed deposition of ZnO in the biological scaffold. Characterizations using scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray powder diffraction confirmed the successful surface modification and revealed the predominant growth of ZnO rods on earlywood (EW) regions. The wetting properties of these new wood-composite materials have been extensively investigated to study the influence of the grooved wood surface structure and its chemical heterogeneity on the wettability. We demonstrate that the ZnO–wood samples have alternating hydrophilic and hydrophobic “strips”, corresponding to the EW and latewood grains from the native wood, and that the surfaces are endowed with an interesting anisotropic wetting property. Using these special wetting properties, we further modified ZnO–wood samples with inorganic and organic compounds and we report on basic experiments to show potential applications, in the design of biphasic materials and the control of water droplet movement on surfaces.

中文翻译：

通过控制和选择性化学改性的三维木脚手架制备具有润湿性图案的木材复合材料

通过将ZnO棒水热生长到木材支架中，合成了具有图案化润湿特性的木材复合材料。我们利用木材的自然形态特征，通过生物支架中ZnO的自定向沉积来选择性地改性木材。使用扫描电子显微镜，能量色散X射线光谱和X射线粉末衍射进行的表征证实了成功的表面改性，并揭示了ZnO棒在早材（EW）区域上的主要生长。这些新型木材复合材料的润湿性能已得到广泛研究，以研究带凹槽的木材表面结构及其化学不均匀性对润湿性的影响。我们证明了ZnO-木材样品具有交替的亲水性和疏水性“条”，对应于天然木材的EW和晚木颗粒，并且表面具有有趣的各向异性润湿特性。利用这些特殊的润湿特性，我们用无机和有机化合物进一步修饰了ZnO木材样品，并报告了一些基础实验以显示其在双相材料设计和控制表面上的水滴运动方面的潜在应用。

更新日期：2017-11-08

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