Preparation method of temperature-sensitive transparent wood
A temperature-sensitive, wood technology, applied in wood treatment, wood heating, wood impregnation, etc., can solve the problem of no related articles or reports, and achieve the effect of good social application value, added value, and beautiful appearance
Inactive Publication Date: 2019-07-05
SHAANXI UNIV OF SCI & TECH
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Problems solved by technology
[0005] At present, only a small number of domestic and foreign scholars have conducted research on transparent wood, but there are no relevant articles or reports at home and abroad on the temperature-sensitive modification of transparent wood.
Method used
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Embodiment 2
[0043] The preparation of thermosensitive transparent wood comprises the following steps:
[0044] 1) First place the sample (wood flakes) in a closed container filled with boiling water, and use steam and high-temperature liquid water to quickly wet the wood chips;
[0045] 2) Put the wetted sample into 4% sodium hydroxide solution for pretreatment, the treatment temperature is 40°C, react for 2 hours, and then rinse with dedistilled water until neutral;
[0046] 3) Then the sample was treated with a sufficient amount of sodium chlorite with a mass fraction of 6% under acidic conditions (pH 3), and the treatment time was 2.5 hours;
[0047] 4) Rinse the treated wood with distilled water to neutrality, and then dehydrate the sample by freeze-drying method;
[0048] 5) Put the dehydrated sample into a solution of 60°C±2°C nano-temperature-changing powder dispersed in an organic solvent with a mass fraction of 2%, load it through fluid, and load the nano-reversible temperature-...
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The invention provides preparation of temperature-sensitive transparent wood. The preparation comprises the following steps: firstly performing pretreatment on a wood sheet sample, performing treatment by using a sodium chlorite solution and glacial acetic acid, and performing washing by using water to neutrality to obtain a wood substrate without chromophoric group components; performing dehydration treatment on the sample by adopting an organic solvent gradient method or a supercritical drying method to further obtain a dehydrated wood substrate without the chromophoric group components; loading nano temperature-change powder dispersed into an organic solvent into cell cavities and cell walls of the wood substrate without the chromophoric group components by a fluid to obtain a wood substrate loaded with reversible nano temperature-sensitive particles; and performing impregnation by using a polymer having a refractive index similar to that of fibers and high optical transmittance, and performing further solidification polymerization to obtain the temperature-sensitive reversible transparent wood. According to preparation provided by the invention, the temperature-sensitive reversible transparent wood obtained by the preparation is not only reversible in temperature sensitivity, but also has an optical transmittance with 80% or more.
Description
technical field [0001] The invention belongs to the technical field of wood technology development and modification, and in particular relates to a preparation method of temperature-sensitive transparent wood. Background technique [0002] Wood is an anisotropic natural polymer material, mainly composed of cellulose, hemicellulose and lignin. Among them, cellulose extends in an orderly manner along the plant growth direction, and lignin and hemicellulose are used as fillers and binders, distributed between the microfibers of the cell wall and the intercellular layer, bonding adjacent cells together, endowing cells with The plants have great mechanical strength. [0003] The invention aims at preparing a temperature-sensitive transparent wood, and mainly involves two technical problems, one is the temperature-sensitive modification of wood, and the other is the light-transmitting modification of wood. [0004] In order for wood to have high light transmittance, it is first ...
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IPC IPC(8): B27K5/00B27K3/02B27K3/20B27K5/04B27K3/00B27K3/34B27K3/08
CPCB27K3/007B27K3/0207B27K3/08B27K3/20B27K3/34B27K5/001B27K5/0055B27K5/0065B27K5/04
Inventor 殷学风田杏欢林涛段敏张希娟范晶李静袁枚田赵欢
Owner SHAANXI UNIV OF SCI & TECH