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Method for assembling polyelectrolyte/inorganic nano-particle multilayer films on surfaces of wood materials layer by layer

A technology of inorganic nanoparticles and wood materials, which is applied in the field of layer-by-layer assembly of polyelectrolyte/inorganic nanoparticle multilayer films on the surface of wood materials, can solve the problems of physical and chemical property damage of wood materials, long treatment period, environmental pollution, etc., and achieves low cost. , energy saving, simple and convenient operation

Active Publication Date: 2014-04-23
NORTHEAST FORESTRY UNIVERSITY
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Problems solved by technology

[0006] The purpose of the present invention is to solve the problems of high cost, large-scale equipment, certain environmental pollution, certain damage to the physical and chemical properties of the wood material itself, and relatively long processing period in the existing wood material functional improvement technology. A method for assembling polyelectrolyte / inorganic nanoparticle multilayer films on the surface of wood materials is provided

Method used

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  • Method for assembling polyelectrolyte/inorganic nano-particle multilayer films on surfaces of wood materials layer by layer
  • Method for assembling polyelectrolyte/inorganic nano-particle multilayer films on surfaces of wood materials layer by layer
  • Method for assembling polyelectrolyte/inorganic nano-particle multilayer films on surfaces of wood materials layer by layer

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specific Embodiment approach 1

[0040] Embodiment 1: The method for assembling the polyelectrolyte / inorganic nanoparticle multilayer film on the surface of the wooden material described in this embodiment is specifically carried out according to the following steps:

[0041] 1. Pretreatment and drying treatment: Clean the wooden material with distilled water or immerse the wooden material in 0.01mol / L~0.1mol / L dilute hydrochloric acid for surface activation treatment, the immersion time is 1min~5min, and then soak the wooden material The material is dried to obtain a woody material with a negatively charged surface;

[0042] The drying is drying at a temperature of 60°C to 105°C or drying in N 2 air drying;

[0043] 2. Preparation of polycation electrolyte film-making solution: dissolve polycation electrolyte in water, adjust pH to 2-9, stir evenly, and then perform ultrasonic degassing to obtain polycation electrolyte film-making solution with a mass fraction of 0.5% to 5%. ;

[0044] 3. Preparation of p...

specific Embodiment approach 2

[0057] Embodiment 2: This embodiment is different from Embodiment 1 in that: the wooden material described in step 1 is wood, bamboo, rattan or wood fiber. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0058] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the polycation electrolyte described in step two is polyacrylamine hydrochloride, polyacrylamide or polydimethyldiallyl ammonium chloride. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a method for assembling polyelectrolyte / inorganic nano-particle multilayer films on the surfaces of wood materials layer by layer, and relates to a method for assembling multilayer films on the surfaces of wood materials layer by layer. The method includes firstly, pre-treating and drying the wood materials; secondly, preparing cationic polyelectrolyte film forming liquid, anionic polyelectrolyte film forming liquid and inorganic nano-particle film forming liquid; thirdly, alternately soaking the wood materials in the cationic polyelectrolyte film forming liquid and the anionic polyelectrolyte film forming liquid to form polyelectrolyte multilayer films; fourthly, alternating soaking the wood materials in the cationic polyelectrolyte film forming liquid, the anionic polyelectrolyte film forming liquid and the inorganic nano-particle film forming liquid to obtain the wood materials with the polyelectrolyte / inorganic nano-particle multilayer films which are formed on the surfaces of the wood materials. The method has the advantages that problems of high cost, the requirement on large devices, certain environmental pollution, certain destruction on physical and chemical properties of wood materials and long relative treatment periods of an existing technology for improving the functionality of the wood materials can be solved, and the method is used for assembling the polyelectrolyte / inorganic nano-particle multilayer films on the surfaces of the wood materials layer by layer.

Description

technical field [0001] The invention relates to a method for assembling a multilayer film layer by layer on the surface of a wooden material. Background technique [0002] The introduction of nanotechnology into the field of wood functional improvement research has been a research hotspot in recent years. Using the properties of nanomaterials such as particle volume effect and surface effect, the rigidity, dimensional stability and thermal stability of inorganic substances are related to the toughness and toughness of wood. Workability, dielectric properties, and unique environmental properties combine to give wood new functions. Layer by layer self-assembly (LbL) is an important thin film preparation technology, which has the advantages of a wide range of assembled molecules, simple operation, and mild conditions. Therefore, the combination of the two technologies for the functional improvement of wood has strong development prospects. [0003] As early as 1966, Iler firs...

Claims

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Application Information

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IPC IPC(8): B05D1/18B05D1/38B05D3/00
Inventor 于海鹏刘永壮富艳春
Owner NORTHEAST FORESTRY UNIVERSITY
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