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Method for reinforcing wood powder/polyolefin composite material by utilizing surface-treated continuous aramid fibers

An aramid fiber and composite material technology is applied in the field of reinforced wood flour/polyolefin composite materials, which can solve the problems of affecting the strength of the aramid fiber surface structure itself, high cost, and poor bonding strength between the fiber and the wood-plastic matrix interface.

Active Publication Date: 2021-02-05
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the existing fiber-reinforced wood-plastic composite material has a poor bonding strength between the fiber and the wood-plastic matrix interface, but the existing fiber modification method is expensive, or may affect the surface structure of the aramid fiber and thus The problem of reducing its own strength provides a method for reinforcing wood flour / polyolefin composites with surface-treated continuous aramid fibers

Method used

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  • Method for reinforcing wood powder/polyolefin composite material by utilizing surface-treated continuous aramid fibers
  • Method for reinforcing wood powder/polyolefin composite material by utilizing surface-treated continuous aramid fibers
  • Method for reinforcing wood powder/polyolefin composite material by utilizing surface-treated continuous aramid fibers

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specific Embodiment approach 1

[0033] Specific embodiment one: a kind of method utilizing the continuous aramid fiber of surface treatment in this embodiment to strengthen wood powder / polyolefin composite material, it carries out according to the following steps:

[0034] 1. Pretreatment:

[0035] washing the continuous aramid fiber bundle with a solvent to remove surface impurities, and then drying to constant weight to obtain the pretreated continuous aramid fiber bundle;

[0036] 2. Continuous aramid fiber bundles coated with dopamine:

[0037] Adjust the pH of the Tris-HCl buffer solution to 8-9 to obtain a Tris-HCl buffer solution after adjusting the pH, then add dopamine hydrochloride to the Tris-HCl buffer solution after adjusting the pH to obtain a dopamine hydrochloride solution. The continuous aramid fiber bundle is immersed in the dopamine hydrochloride solution, soaked at room temperature for 2 hours to 48 hours, taken out after dipping, washed and dried, and the continuous aramid fiber bundle ...

specific Embodiment approach 2

[0049] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the continuous aramid fiber bundle described in step 1 is 1000D continuous aramid fiber bundle, wherein D is the linear density unit, referring to the length of the 9000m long fiber bundle Mass, in g. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0050] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: a continuous aramid fiber bundle consists of 666 single fibers. Others are the same as those in the first or second embodiment.

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Abstract

The invention relates to a method for reinforcing a wood powder / polyolefin composite material, in particular to a method for reinforcing a wood powder / polyolefin composite material by utilizing surface-treated continuous aramid fibers, which aims to solve the problem of poor interface bonding strength between fibers and a wood-plastic matrix in the existing fiber-reinforced wood-plastic compositematerial, and the problem that the existing fiber modification method is high in cost or can influence the surface structure of aramid fibers so as to reduce the strength of the aramid fibers. The preparation method comprises the following steps of 1, pretreatment, 2, carrying out dopamine coating treatment on the continuous aramid fiber bundle, 3, performing dopamine-VTES cooperative treatment onthe continuous aramid fiber bundle; and 4, preparing the continuous aramid fiber reinforced wood powder / polyolefin composite material. The continuous aramid fiber reinforced wood powder / polyolefin composite material is used for surface treatment.

Description

technical field [0001] The invention relates to a method for strengthening wood flour / polyolefin composite materials. Background technique [0002] Wood-plastic composites (WPCs) are high-value-added composite materials composed of thermoplastics as the matrix and wood fibers as the reinforcing phase. Due to its environmental friendliness, adjustability, and easy processing, it is widely used in interior decoration, infrastructure, building materials and other fields. In the actual production of WPCs, coupling agents / compatibilizers (maleic anhydride grafted polyolefins, silane coupling agents, etc.) are often added to improve the interfacial bonding between non-polar plastic matrix and polar wood fibers. The prepared WPCs have effectively improved mechanical properties due to the enhanced stress transfer efficiency. Nevertheless, due to the limited strength of the plastic matrix itself and the high addition of wood fiber, traditional WPCs are still difficult to apply to s...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/06C08L51/06C08L77/10C08K5/098C08J5/06
CPCC08J5/06C08J2397/02C08J2423/06C08J2451/06C08J2477/10C08K5/098
Inventor 王海刚栗越谢延军刘婉玉王伟宏肖泽芳王永贵
Owner NORTHEAST FORESTRY UNIVERSITY
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