Method for preparing nanometer SiO2 doped wood-organic-inorganic hybrid nanometer composite material

A nano-composite material and nano-technology, applied in the field of preparation of wood composite materials, can solve the problems of poor thermal stability, low impact toughness, poor mechanical properties of wood-inorganic (nano) composite materials, etc., to improve brittleness and high mechanical properties Performance and thermal stability, effect of improving interfacial compatibility

Active Publication Date: 2012-11-14
SHANDONG AGRICULTURAL UNIVERSITY
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Problems solved by technology

[0005] In order to solve the technical problems of poor thermal stability of wood-organic polymer composites, low impact toughness and poor mechanical properties of wood-inorganic (nano) composites, the present invention provides a method based on nano-SiO 2 Preparation method of doped wood-organic-inorganic hybrid nanocomposite

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  • Method for preparing nanometer SiO2 doped wood-organic-inorganic hybrid nanometer composite material
  • Method for preparing nanometer SiO2 doped wood-organic-inorganic hybrid nanometer composite material
  • Method for preparing nanometer SiO2 doped wood-organic-inorganic hybrid nanometer composite material

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specific Embodiment approach 1

[0034] Specific implementation mode 1: This implementation mode is based on nano-SiO 2 The preparation method of the doped wood-organic-inorganic hybrid nanocomposite material is carried out in the following steps:

[0035] 1. Weigh 1 mass part of the functional monomer and the toughening agent and mix them uniformly, the mass of the toughening agent is 1% to 150% of the mass of the functional monomer to obtain a monomer solution;

[0036] 2. Weigh 0.1% to 1% nano-SiO of the mass of the monomer solution obtained in step 1 2 (with unsaturated double bonds on the surface), and then nano-SiO 2 Drying treatment for 24h under vacuum drying conditions of 105°C and 0.01MPa, and the dried nano-SiO 2 Add it into the monomer solution, and then ultrasonically treat it for 40min at a temperature of 15°C to 30°C and a frequency of 300Hz to obtain nano-SiO 2 Uniformly dispersed monomer mixed solution;

[0037] Three, take by weighing cross-linking agent, initiator and acetone, wherein t...

specific Embodiment approach 2

[0049] Embodiment 2: This embodiment differs from Embodiment 1 in that the mass of the toughening agent in step 1 is 50% of the mass of the functional monomer. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0050] Specific embodiment three: the difference between this embodiment and specific embodiment one is that in step two, the nano-SiO that accounts for 0.5% of the monomer solution quality that step one obtains is weighed 2 (with unsaturated double bonds on the surface). Others are the same as in the first embodiment.

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Abstract

The invention discloses a method for preparing a nanometer SiO2 doped wood-organic-inorganic hybrid nanometer composite material, and relates to a method for preparing a wood composite material. The method is invented for solving the technical problems that the wood-organic polymer composite material is poor in thermal stability, low in impact toughness and poor in the mechanical property of the wood-inorganic (nanometer) composite material. The method comprises the following steps of: firstly, ultrasonically dispersing nanometer SiO2 (unsaturated double bonds on the surface) into a monomer solution; compounding an initiator and a crosslinking agent to form an impregnation liquid; putting wood into the impregnation liquid and placing the impregnated wood into a reaction kettle; after the reaction kettle is hermetic, vacuumizing the reaction kettle; releasing the vacuumization, and then pressurizing by air; reducing the pressure to the constant pressure; taking out the wood; covering the impregnated wood by an aluminum-foil paper; heating the impregnated wood covered by the aluminum-foil paper; removing the aluminum-foil paper; and further heating the wood to prepare the composite material. The polymer in the wood-organic-inorganic hybrid nanometer composite material is well compatible to a wood substrate interface, so that the prepared composite material is high in mechanical strength, heat stability, size stability and anti-corrosion performance.

Description

technical field [0001] The invention relates to a method for preparing wood composite materials. Background technique [0002] Most of the wood-organic polymer composites prepared based on monomer impregnation and polymerization have good mechanical properties and durability (corrosion resistance and dimensional stability), and retain the ecological environment material characteristics of wood. There is a market demand in the field of materials and decorative materials for special places, and it is of great significance to the efficient utilization of wood, especially low-quality wood; but most of these materials have low thermal stability due to the poor heat resistance of polymers (such as The maximum pyrolysis temperature is a measure), even lower than the wood itself, and the impact toughness of this type of material is significantly reduced due to the brittle characteristics of the polymer, which limits the widening application of this type of material. [0003] The im...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/00C08L97/02C08L33/10C08L29/10C08K13/06C08K9/00C08K3/36C08K5/103C08K5/09C08K5/17C08F220/32C08F216/14C08F4/04C08F4/34
Inventor 董晓英李永峰贾万达
Owner SHANDONG AGRICULTURAL UNIVERSITY
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