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Preparation method and application for biomass fibre-aliphatic polyester composite material macromolecular coupling agent

A technology of macromolecular coupling agent and biomass fiber is applied in the field of preparing aliphatic polyester composite materials to achieve the effect of improving comprehensive performance and low cost

Active Publication Date: 2014-06-25
SHAANXI HUAHAOXUAN NEW ENERGY TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The above-mentioned interfacial modifiers can be used as coupling agents for biomass fiber-aliphatic polyester composite materials, but their type and dosage need to be changed according to the type of reinforcing fiber and polyester matrix, and the above-mentioned types of modifiers are currently lacking Effects on Biodegradability of Composite Materials Reported

Method used

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  • Preparation method and application for biomass fibre-aliphatic polyester composite material macromolecular coupling agent
  • Preparation method and application for biomass fibre-aliphatic polyester composite material macromolecular coupling agent
  • Preparation method and application for biomass fibre-aliphatic polyester composite material macromolecular coupling agent

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preparation example Construction

[0036] A preparation method and application of a biomass fiber-aliphatic polyester composite material macromolecular coupling agent, comprising the following steps:

[0037] Step 1, preparation of biomass-based macromolecular coupling agent product:

[0038] Dissolve the biomass-based component in a suitable aprotic solvent to obtain a solution with a mass concentration of 0.1%~10%, stir for 1~20min under the protection of an inert gas, and use a 1:1~1:3 reactive group The molar ratio is added dropwise to the esterification reaction reagent, and the reaction is stirred at 30-70°C for 8-48 hours; the product after the above-mentioned stirring reaction is precipitated in 2-20 times the volume of deionized water, separated and precipitated, and the biomass-based macromolecular coupling is obtained. agent product;

[0039] Step 2, surface treatment of biomass fibers:

[0040] Continue to dissolve the biomass-based macromolecular coupling agent obtained in step 1 in an aprotic s...

Embodiment 1

[0048] (1) Synthesis of lignin-based macromolecular coupling agent: Dissolve 5g sulfate lignin in 100ml DMF, pass N 2 Stir for 10 min under protected conditions, add lauroyl chloride dropwise at a molar ratio of reactive groups of 1:1.2, stir and react at 50°C for 24 h, the obtained product is precipitated in 6 times the volume of deionized water to obtain a lignin-based macromolecular coupling agent product.

[0049] (2) Surface treatment of wood flour: Dissolve the obtained lignin-based macromolecular coupling agent in DMF to prepare a solution with a concentration of 5%. Surface treatment of 80-mesh poplar wood powder with the prepared solution, in which the amount of macromolecular coupling agent relative to the wood powder is 2% by mass ratio, stirred in a high-speed mixer at a speed of 2000rpm for 15min, and drummed at 100°C Air-dried for 12 hours to obtain surface-treated wood powder.

[0050] (3) Preparation of composite materials: Proportion materials according to t...

Embodiment 2

[0053] (1) Synthesis of cellulose-based macromolecular coupling agent: Dissolve 5g of hydroxyethylcellulose (HEC) in 100ml of DMF, pass through N 2 Stir under protected conditions for 10 min, drop octanoyl chloride at a molar ratio of reactive groups of 1:1.3, stir and react at 50°C for 24 h, the obtained product is precipitated in 8 times the volume of deionized water to obtain a cellulose-based macromolecular coupling agent product.

[0054] (2) Surface treatment of bamboo fiber: dissolve the obtained macromolecular coupling agent in DMF to prepare a solution with a concentration of 3%. The prepared solution is used for surface treatment of 80-mesh bamboo powder, wherein the amount of macromolecular coupling agent relative to the bamboo powder is 2% by mass ratio, stirred in a high-speed mixer at a speed of 2000rpm for 15min, and blasted at 100°C Dry for 12h.

[0055] (3) Preparation of composite materials: Proportion materials according to the following mass percentages: ...

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Abstract

The invention discloses a preparation method and application for a biomass fibre-aliphatic polyester composite material macromolecular coupling agent. The preparation method comprises the following steps: (1) synthesis for a biomass constituent-based macromolecular coupling agent; (2) surface hydrophobic modification for biomass fibre raw materials; (3) compounding for the modified biomass fibre raw materials and an aliphatic polyester matrix. The method can be used for various aliphatic polyester matrixes and is low in raw material limit; moreover, the composite material product is wide in application and can be used for the fields of household appliances, automobile industry, packaging, daily necessities and the like. The method is low in production cost, beneficial to popularize and apply, and has great significance in the aspects of improving the utilization level of biomass raw materials, alleviating petroleum resource crisis, protecting environment, and the like.

Description

technical field [0001] The invention relates to the field of polymer composite materials, in particular to a method for preparing aliphatic polyester composite materials by modifying the surface of biomass fibers with a biomass component-based macromolecular coupling agent. Background technique [0002] Polymer materials have become an important pillar of modern science and technology and national economic construction. Most of their raw materials come from petroleum, and most of them are difficult to degrade. The increasing scarcity of petroleum resources and the pressure of environmental protection make the development of low-carbon, environmentally friendly polymer materials an important task. Aliphatic polyester (such as PLA, PBS, PBAT, etc.) is a commercialized polymer material with excellent biodegradability and can be decomposed naturally under composting conditions. It is a green synthetic resin that can greatly reduce environmental pollution . However, aliphatic p...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L97/02C08L1/26C08H7/00C08J3/00
Inventor 岳小鹏徐永建周乐群朱振峰田勇张鼎军
Owner SHAANXI HUAHAOXUAN NEW ENERGY TECH DEV CO LTD
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