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A kind of modified bagasse-plastic composite material and its preparation method and application

A composite material and technology of bagasse, which is applied in the field of preparation of modified bagasse-plastic composite materials, can solve the problems of complex physical modification methods, difficulty in industrial production, environmental pollution, etc., achieve remarkable modification effects, low production costs, and reliable good control effect

Active Publication Date: 2016-08-17
ZHONGKAI UNIV OF AGRI & ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chemical modification mainly uses various acid-base and redox reaction reagents to introduce active or polar groups such as carboxyl and amine groups on the fiber surface through acid-base, oxidation / reduction and other chemical reactions to improve the bond between the fiber and the resin matrix. However, the chemical modification operation produces a large amount of black liquor and degrades lignin and hemicellulose. On the one hand, it is a waste of resources; on the other hand, it pollutes the environment
Physical modification does not change the chemical composition of the fiber, but changes the structure and surface properties of the fiber. The Chinese patent application "Sonic chemical pretreatment method for bagasse for wood-plastic composite materials" with the application number CN200410051466.0 discloses a method using The process of modifying the surface of bagasse fibers by ultrasonic waves; however, this physical modification method is relatively complicated, and industrial production is difficult

Method used

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  • A kind of modified bagasse-plastic composite material and its preparation method and application
  • A kind of modified bagasse-plastic composite material and its preparation method and application
  • A kind of modified bagasse-plastic composite material and its preparation method and application

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Experimental program
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Effect test

Embodiment 1

[0030] (1) Bagasse is put into a blast drying oven, dried at 105° C. for 3 hours, then pulverized with a high-speed pulverizer for 3 minutes, and passed through a 100-mesh sieve (scanning electron microscope photo as shown in figure 1 Shown); use the mechanical activation method to modify the surface of the fiber: the mechanical activation treatment equipment adopts a ball mill, and the grinding ball medium and bagasse fiber are added to the grinding cylinder of the ball mill. Be 100min (the scanning electron micrograph of bagasse fiber when processing 60min is as figure 2 shown);

[0031] (2) According to maleic anhydride: acetone mass ratio = 1:2, maleic anhydride is dissolved in acetone to prepare a solution, then the bagasse activated by step (1) is dropped into the solution according to the solid-to-liquid ratio of 1:2 and stirred evenly Dry, the content of maleic anhydride is 5% of the bagasse fiber; then put the dried bagasse into the ball mill, add BPO accounting for...

Embodiment 2

[0039] (1) Put the bagasse into the blast drying box, dry it at 105° C. for 3 hours, pulverize it with a high-speed pulverizer for 3 minutes, and pass through a 100-mesh sieve; adopt the mechanical activation method to modify the surface of the fiber: the mechanical activation treatment equipment adopts a ball mill, Add grinding medium and bagasse fiber to the grinding cylinder of the ball mill, the speed of rotation is 60 rpm, the temperature is 40°C, and the surface modification time is 50 minutes;

[0040] (2) According to maleic anhydride: acetone mass ratio = 1:3, maleic anhydride is dissolved in acetone to prepare a solution, then the bagasse activated by step (1) is dropped into the solution according to the solid-to-liquid ratio of 1:3 and stirred evenly Dry in the air to ensure that the content of maleic anhydride is 6% of the bagasse fiber; then put the dried bagasse into the ball mill, add BPO accounting for 5% of the bagasse fiber at the same time, heat up to 80°C, ...

Embodiment 3

[0047] (1) Put the bagasse into the blast drying box, dry it at 105° C. for 3 hours, pulverize it with a high-speed pulverizer for 3 minutes, and pass through a 100-mesh sieve; adopt the mechanical activation method to modify the surface of the fiber: the mechanical activation treatment equipment adopts a ball mill, Add grinding media and bagasse fibers to the grinding cylinder of the ball mill, at a speed of 50 rpm and a temperature of 55°C, and the surface modification time is 10 minutes;

[0048] (2) According to maleic anhydride: acetone mass ratio = 1:4, maleic anhydride is dissolved in acetone to prepare a solution, and then the bagasse activated by step (1) is dropped into the solution according to the solid-to-liquid ratio of 1:3 and stirred evenly and then naturally Dry in the air to ensure that the content of maleic anhydride is 8% of the bagasse fiber; then put the dried bagasse into the ball mill, add BPO accounting for 8% of the bagasse fiber at the same time, heat...

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Abstract

The invention belongs to the field of composite materials, and discloses a modified bagasse-plastic composite material and a preparation method thereof. The method comprises the following steps: putting dry bagasse fiber and a grinding medium into a ball mill, and activating the bagasse fiber in a mechanical activation mode; adding the activated bagasse fiber into a maleic anhydride-acetone solution, evenly stirring, and volatilizing; putting the dry bagasse into the ball mill while adding an initiator, heating to 80 DEG C, keeping the temperature, and reinforcing polymerization reaction by mechanical activation; extracting the product with acetone to obtain the modified bagasse fiber; premixing a resin matrix with a compound plasticizer, borax and processing assistants in a high-speed mixer until the material temperature is 50 DEG C, adding the modified bagasse fiber, and thoroughly mixing to obtain a premixture; and carrying out melt extrusion on the premixture to obtain the bagasse-plastic composite material. The modified bagasse-plastic composite material can be used for manufacturing various plastic products. The method is simple and easy to implement and low in cost, and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of composite materials, in particular to a preparation method of modified bagasse-plastic composite materials. Background technique [0002] As a widely existing natural agricultural waste resource, bagasse has the characteristics of wide sources, cheap, renewable and non-polluting, and is increasingly favored in polymer materials due to its excellent biodegradable properties. The main component of bagasse is cellulose, followed by hemicellulose and lignin, of which cellulose accounts for about 40% to 50%. The molecular chains of bagasse fibers are very rigid and polar, highly crystalline and oriented, which can endow the composite with high modulus tensile strength and bending strength. However, due to the strong hydrogen bond between the bagasse fiber hydroxyl and the phenolic hydroxyl, the activity is extremely poor, making it difficult for the hydroxyl to interact with other atoms or groups, which directly affect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L29/04C08L3/02C08L51/00C08K13/02C08K5/053C08K5/21C08K3/38C08K5/103C08F289/00
Inventor 周向阳严志云谢东贾志欣石虹桥戈明亮
Owner ZHONGKAI UNIV OF AGRI & ENG
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