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Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof

A wood-plastic composite material and pulp fiber technology, which is applied in fiber treatment, biochemical fiber treatment, textiles and papermaking, etc., can solve the problems of weak interaction, poor dispersion, and poor mechanical properties of wood-plastic composite materials, so as to increase the content, Effect of improving mechanical strength and increasing environmental friendliness

Inactive Publication Date: 2015-10-07
华东理工常熟研究院有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is to overcome the defects such as the poor dispersion of wood fiber in the matrix in the wood-plastic composite material, the weak interaction between the two phases, and the poor mechanical properties of the wood-plastic composite material prepared by using it. Provided are an enzyme-modified pulp fiber, a wood-plastic composite material and a preparation method thereof

Method used

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  • Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof
  • Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof
  • Enzyme modified paper pulp fiber, wood-plastic composite material and preparation method thereof

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Embodiment 1

[0053] In embodiment 1, the method for enzyme modification pulp fiber, comprises the following steps: after pulp fiber is immersed in water (the mass ratio of pulp fiber and water is 1:15) after 0.5 hour, mix with compound enzyme, use pH value 4.6 citric acid-sodium citrate buffer solution to adjust the pH value of the reaction solution to 4.6, a small amount of 2mol / L disodium EDTA solution was added dropwise to prevent the formation of metal-enzyme complexes, and the reactant solution was reacted at 50°C for 4 After the reaction, the reaction solution is heated to boiling (100° C.) to inactivate the enzyme, then centrifuged and washed until the pH of the clear liquid is 7, and the solid product is dried at 70° C. to a water content≤2%. Obtain enzyme modified pulp fiber. Wherein, the compound enzyme is a mixture of hemicellulase, xylanase and pectinase, the weight ratio thereof is 2:2:1, and the mass of the compound enzyme is 20% of the pulp fiber mass.

[0054] Example 1

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Embodiment 2

[0068] In embodiment 2, the method for enzyme modification pulp fiber, comprises the following steps: after pulp fiber is immersed in water (the mass ratio of pulp fiber and water is 1:15) after 0.5 hour, mix with compound enzyme, use pH value 4.6 citric acid-sodium citrate buffer solution to adjust the pH value of the reaction solution to 4.6, a small amount of 2mol / L disodium EDTA solution was added dropwise to prevent the formation of metal-enzyme complexes, and the reactant solution was reacted at 50°C for 3 After the reaction, the reaction solution is heated to boiling (100° C.) to inactivate the enzyme, then centrifuged and washed until the pH of the clear liquid is 7, and the solid product is dried at 70° C. to a water content≤2%. Obtain enzyme modified pulp fiber. Wherein, the compound enzyme is a mixture of hemicellulase, xylanase and pectinase, the weight ratio thereof is 2:2:1, and the mass of the compound enzyme is 10% of the pulp fiber mass.

[0069] Example 2

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Embodiment 3

[0081] In embodiment 3, the method for enzyme modification pulp fiber, comprises the following steps: after pulp fiber is immersed in water (the mass ratio of pulp fiber and water is 1:15) after 0.5 hour, mix with compound enzyme, use pH value 4.6 citric acid-sodium citrate buffer solution to adjust the pH value of the reaction solution to 4.6, a small amount of 2mol / L disodium EDTA solution was added dropwise to prevent the formation of metal-enzyme complexes, and the reactant solution was reacted at 50°C for 3 After the reaction, the reaction solution is heated to boiling (100° C.) to inactivate the enzyme, then centrifuged and washed until the pH of the clear liquid is 7, and the solid product is dried at 70° C. to a water content≤2%. Obtain enzyme modified pulp fiber. Wherein, the composite enzyme is a mixture of hemicellulase and xylanase, the weight ratio thereof is 2:1, and the composite enzyme mass is 30% of the pulp fiber mass.

[0082] Example 3

[0083] (1) Pulver...

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Abstract

The invention discloses an enzyme modified paper pulp fiber, a wood-plastic composite material and a preparation method thereof. The method of the enzyme modified paper pulp fiber comprises the following steps: modifying the paper pulp fiber by adopting a compound enzyme, wherein the compound enzyme is a mixture of hemicellulose, xylanase and pectinase, wherein the mass ratio of the hemicellulose to the xylanase to the pectinase is 2:2:1 to 2:1:0, and the weight of the compound enzyme accounts for 10%-30% of the weight of the paper pulp fiber. The invention discloses the wood-plastic composite material which comprises the following ingredients: a polyolefin compound, enzyme modified paper pulp fiber, a compatilizer and a releasing agent. When being used for preparing the wood-plastic composite material, the enzyme modified paper pulp fiber has good mechanical performance, the preparation method of the enzyme modified paper pulp fiber and the wood-plastic composite material is easy to operate, environmentally friendly and suitable for industrial production.

Description

technical field [0001] The invention relates to an enzyme-modified pulp fiber, a wood-plastic composite material and a preparation method thereof. Background technique [0002] Due to the rapidly growing awareness of environmental protection, the increasingly serious global pollution problem and the lack and price of petroleum resources, sustainable development and the utilization and development of renewable resources have received more and more attention. Natural fibers, especially wood fiber-reinforced thermosetting and thermoplastic polymer composites-wood-plastic composites have become a research hotspot in the field of composite materials since the 21st century, and have been used in automobiles, construction, packaging and other industries. application. [0003] Lignocellulosic fibers are organic flocculent fiber substances obtained by mechanical processing of natural renewable wood. They have the advantages of abundant sources, carbon neutrality, biodegradability, l...

Claims

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Application Information

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IPC IPC(8): D06M16/00C08L23/12C08L97/02C08L51/06
Inventor 王妍程艳刘颖陈立张桂新郭卫红
Owner 华东理工常熟研究院有限公司
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