Method for preparing novel bamboo fiber composite materials

A bamboo fiber composite and new material technology, which is applied in the field of preparation of new bamboo fiber composite materials, can solve the problems of large amount of coupling agent, low interfacial bonding strength, and limited improvement, and achieve simple preparation process and improved compatibility sex, strength-enhancing effect

Inactive Publication Date: 2018-12-25
SUZHOU LUOTELAN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Bamboo fibers used as composite fillers are hydrophilic, while esters are hydrophobic, and the interfacial bonding strength between the two is very low.
At present, although some studies use silane and acrylic anhydride coupling agents to improve the interfacial bonding between fibers and resins, the degree of improvement is limited, and some coupling agents are used in large amounts, and the strength and cost of composite materials cannot be compared with glass fibers. Reinforced resin composite materials compete, and the product cannot be applied to the field of automotive and electrical load-bearing structural parts that require high strength

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] S1: Cut the bamboo fibers into pieces, wash them with ethanol for 3 times and distilled water for 3 times, then place them in an oven at 90°C and dry them to dryness;

[0022] S2: Mix polyethylene glycol, polyether and polyimide at a volume ratio of 1:2:1.5, stir at a temperature of 60°C for 20 minutes to form a mixture, and stir evenly;

[0023] S3: Add dibutyl sebacate to the mixture in step S2, the volume ratio of the two is 1:0.2, and stir at a temperature of 100° C. for 10 minutes;

[0024] S4: Add the dried bamboo fiber and potassium persulfate in step S3, the solid-to-liquid ratio of the bamboo fiber and the mixed solution in step S2 is 1:10, and the mass ratio of the potassium persulfate to the bamboo fiber is 0.3 %; Ultrasonic treatment at a power of 1000W for 8min; raising the temperature to 130°C, hot pressing at a pressure of 2MPa for 20min; naturally cooling to room temperature, the bamboo fiber composite material can be obtained.

Embodiment 2

[0026] S1: Cut the bamboo fibers into pieces, wash them with ethanol for 3 times and distilled water for 3 times, then put them in an oven at 105°C and dry them until they are absolutely dry;

[0027] S2: Mix polyethylene glycol, polyether and polyimide at a volume ratio of 1:3:2.5, stir at 80°C for 40 minutes to form a mixture, and stir evenly;

[0028] S3: Add dibutyl sebacate to the mixture in step S2, the volume ratio of the two is 1:0.5, and stir at a temperature of 120° C. for 30 minutes;

[0029] S4: Add the dried bamboo fiber and potassium persulfate in step S3, the solid-to-liquid ratio of the bamboo fiber and the mixed solution in step S2 is 1:20, and the mass ratio of the potassium persulfate to the bamboo fiber is 0.6 %; Ultrasonic treatment at a power of 1500W for 15min; raising the temperature to 150°C, hot pressing at a pressure of 5MPa for 40min; naturally cooling to room temperature, the bamboo fiber composite material can be obtained.

Embodiment 3

[0031] S1: Cut the bamboo fibers into pieces, wash them with ethanol for 3 times and distilled water for 3 times, then place them in an oven at 95°C and dry them to dryness;

[0032] S2: Mix polyethylene glycol, polyether and polyimide in a volume ratio of 1:2:2.5, stir at 65°C for 25 minutes to form a mixture, and stir evenly;

[0033] S3: Add dibutyl sebacate to the mixture in step S2, the volume ratio of the two is 1:0.3, and stir at a temperature of 105° C. for 15 minutes;

[0034] S4: Add the dried bamboo fiber and potassium persulfate in step S3, the solid-to-liquid ratio of the bamboo fiber and the mixed solution in step S2 is 1:12, and the mass ratio of the potassium persulfate to the bamboo fiber is 0.4 %; Ultrasonic treatment at a power of 1200W for 10min; raising the temperature to 135°C, hot pressing at a pressure of 3MPa for 25min; naturally cooling to room temperature, the bamboo fiber composite material can be obtained.

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Abstract

The invention provides a method for preparing novel bamboo fiber composite materials. The method includes shearing bamboo fibers, washing the bamboo fibers by ethyl alcohol and distilled water, then placing the bamboo fibers in drying ovens at the temperatures of 90-105 DEG C and drying the bamboo fibers until the bamboo fibers are absolutely dry; mixing polyethylene glycol, polyether and polyimide with one another, stirring the polyethylene glycol, the polyether and the polyimide at the temperature of 60-80 DEG C for 20-40 min to obtain mixed liquid and uniformly stirring the mixed liquid; adding dibutyl sebacate into the mixed liquid, and stirring the dibutyl sebacate and the mixed liquid at the temperature of 100-120 DEG C for 10-30 min; adding the dried bamboo fibers and potassium persulfate into the mixed liquid; carrying out ultrasonic treatment at the power of 1000-1500 W for 8-15 min; increasing the temperatures until the temperatures reach 130-150 DEG C and carrying out hot-pressing under the pressure of 2-5 MPa for 20-40 min; carrying out natural cooling until the temperatures reach the room temperature so as to obtain the novel bamboo fiber composite materials.

Description

technical field [0001] The invention relates to the technical field of new material preparation, in particular to a preparation method of a new bamboo fiber composite material. Background technique [0002] The total area of ​​bamboo forests in my country is more than 63 million mu, accounting for one-third of the total area of ​​bamboo forests in the world, and the growth cycle of bamboo is short and the price is low. Bamboo fiber has high strength and modulus, and its longitudinal tensile strength and modulus can reach 198MPa and 21MPa respectively. Bamboo has a natural spiral toughened structure, and the density of bamboo is only 0.9g / cm 3 Left and right, bamboo fiber has high specific strength (220MPa·cm 3 / g) and specific modulus (23MPa·cm 3 / g) excellent characteristics. These all make it an excellent resin reinforced material. At present, the important development direction of family cars is lightweight, and the most effective way to reduce weight is to use fiber...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L71/00C08L79/08C08L71/02C08L97/02C08K5/11
CPCC08L71/00C08L79/08C08L2205/035C08L2205/16C08L71/02C08L97/02C08K5/11
Inventor 马志明
Owner SUZHOU LUOTELAN NEW MATERIAL TECH
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