The wood samples were placed in the NaClO2 solution and kept boiling state for 2 h until the EW became white. Afterwards, the delignified wood samples were rinsed with DI water for three times and kept in ethanol. Subsequently, the as-prepared epoxy resin was used for thorough infiltrating into the delignified wood scaffold.
Fabricated the aesthetic wood and conducted SEM characterization. Contributed to the analysis of data and mechanical measurements. Were responsible for the Raman mapping.
The excellent UV-blocking properties are ascribed to the existence of phenylpropane structures and phenolic hydroxyl groups in the lignin molecules with UV absorption ability. Consequently, the aesthetic wood treated for 2 h exhibited a good UV absorption performance at the range of 200–400 nm, a high average transparency (80%) at 600 nm, and a low reflectance at the visible wavelengths (Fig.4b). A The SEM image of Douglas fir to show its mesoporous structure. B, c Magnified SEM images of EW and LW to present the differences in microstructural lumina. D The aligned micro-sized channels with tracheids. E The pore diameter distributions of EW and LW in the natural Douglas fir.
This paper aims to trace the contributions to the field of aesthetics found in the work of Henry David Thoreau, particularly in Walden, or, Life in the Woods. In the first part, I mention his criticism of the modern way of life, which is related to the present overvaluation of wealth, consumption, show, and accumulation. In the second part, his search for simplicity, I mention his extraordinary love for the outdoors wood carved german shepherd and the constant exercise of trades that seem useless in our society, like being a forest ranger or a snow storm watcher. Finally, I point out a series of contributions to the aesthetic, including his claim of sensitivity and his exploration of the different ways in which we experience, think, feel and give meaning to nature. Specializing in YOU! Why don’t we have every machine, laser, technology on the market?
The anisotropic thermal transport of aesthetic wood combined with low thermal conductivities is favorable for energy-efficient buildings. The superior thermal insulation to glass positions our developed esthetic wood to be a potential candidate for energy-efficient building materials. Following the same procedure, we then constructed the aesthetic wood-L with straight patterns created by the quarter slicing cutting strategy (Fig.3a). The efficient spatially selective delignification process not only endows excellent structural integrity but also facilitates the large-scale production of aesthetic wood-L. In Fig.3b, we demonstrate the ability to fabricate a sample size of 320 mm × 170 mm × 0.6 mm, which is significantly larger than all reported transparent woods using delignified wood as the framework 1,9,10,11,15,16,28.