Bio-based polyolefin composite material and preparation method therefor

A composite material and polyolefin technology, applied in the field of bio-based polymer materials, can solve the problems of easy migration, low protein content, occupation, etc., and achieve the effect of protecting the ecological environment, excellent mechanical properties, and broad application prospects.

Inactive Publication Date: 2015-10-28
无锡太湖蓝藻资源应用技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, truly degradable plastics such as polylactic acid, polyhydroxyalkanoate, polybutylene succinate, and polybutylene adipate/terephthalate are more expensive and perform better than traditional plastics such as poly There is a certain gap between propylene and polyethylene, which limits its large-scale development and application
Filling modified polymer materials with degradable materials such as plant starch and plant protein to prepare partially degraded composite materials has attracted attention from all over the world. This method is in line with the concepts of resource saving, cost economy and environmental protection; Proteins such as cornstarch, soy flour, and soy protein isolate used as fillers in composites lead to higher food prices, affect animal feed markets, and take up more agricultural land
[0004] With the rapid growth of economy and population, the eutrophication of water body is becoming more and more serious, and the phenomenon of cyanobacteria bloom occurs frequently. Freshwater lakes such as Taihu Lake, Dianchi Lake, and Chaohu Lake have several times of cyanobacteria outbreaks every year, and thousands of tons of cyanobacteria need to be treated every day. Spirulina contains abundant natural high molecular polymers such as protein and polysaccharide, so it can be used as a filler to replace starch to p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A bio-based polyolefin composite material, the preparation method is as follows:

[0029] (1) Drying fresh Microcystis (with a protein content of 36%) in a microwave until the water content is 10%, and crushing to 80 meshes to obtain Microcystis powder;

[0030] (2) Weigh 1000g of Microcystis powder and 50g of acetic anhydride, mix well and add to the reaction kettle, heat the oil bath to 70°C, stir at a speed of 50 rpm, react for 3 hours, and then discharge;

[0031] (3) wash off the modifier acetic anhydride that has not participated in the reaction with acetone, repeat 3 times, place in a 190°C oven and dry for 2 hours to obtain 920g of modified Microcystis, and the residual amount of algal toxin is 12.7% of that before untreated;

[0032] (4) Get 800g of modified Microcystis, 600g of low-density polyethylene, 150g of epoxidized soybean oil, 150g of ethylene-vinyl acetate copolymer, 35g of stearic acid, and 10106g of antioxidants, place in a high-speed mixer and mix ...

Embodiment 2

[0036] A bio-based polyolefin composite material, the preparation method is as follows:

[0037] (1) Microwave-drying fresh Anabaena (with a protein content of 45%) until the water content is 8%, and crushing to 120 meshes to obtain Anabaena powder;

[0038] (2) Weigh 1000g of Anabaena powder and 100g of maleic anhydride, mix well and add to the reaction kettle, heat the oil bath to 90°C, stir at 20 rpm, react for 2 hours, and then discharge;

[0039] (3) Wash away the modifier maleic anhydride that did not participate in the reaction with acetone, repeat 3 times, place in a 120°C oven and dry for 3 hours to obtain 930g of modified Anabaena, and the residual amount of algae toxin is 7.3% of that before untreated ;

[0040] (4) Get 900g of modified Anabaena, 500g of polypropylene copolymer, 100g of epoxy corn oil, 110g of ethylene-vinyl alcohol copolymer, 10g of stearic acid, 10g of ethylene bisstearic acid amide, and 101010g of antioxidant, and place in Mix uniformly in a hi...

Embodiment 3

[0044] A bio-based polyolefin composite material, the preparation method is as follows:

[0045] (1) Microwave-drying fresh spirulina (53% protein content) until the water content is 3%, and crushing to 100 meshes to obtain spirulina powder;

[0046] (2) Weigh 500g of spirulina powder and 20g of n-octanoyl chloride, mix well and add to the reaction kettle, heat the oil bath to 80°C, stir at 35 rpm, react for 1 hour, and then discharge;

[0047] (3) wash off the modifier n-octanoyl chloride that has not participated in the reaction with acetone, repeat 3 times, and place in a 200°C oven to dry for 2 hours to obtain 950g of modified spirulina;

[0048] (4) Get 600g of modified spirulina, 800g of high-density polyethylene, 400g of epoxidized soybean oil, 200g of ethylene-vinyl acetate copolymer, 80g of stearic acid, and 10102g of antioxidants, mix them uniformly in a high-speed mixer, and pass Twin-screw extruder (screw diameter 26mm, L / D=46) is extruded and granulated to obtain...

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Abstract

The invention discloses a bio-based polyolefin composite material which comprises the following raw materials in parts by weight: 30-60 parts of modified blue algae, 25-40 parts of polyolefin, 5-20 parts of a reactive plasticizer, 5-10 parts of a bulking agent, 1-5 parts of a lubricant and 0.1-0.5 parts of an antioxidant. The raw materials are mixed and subjected to extrusion and granulation through a co-rotating twin-screw extruder to prepare the bio-based polyolefin composite material. The composite material is good in component compatibility and excellent in mechanical property, and has a very wide application prospect; and the dependence on a petroleum-based material can be reduced, the white pollution is alleviated, a treatment method for turning blue algae into wealth is provided during algal bloom outbreak, and the ecological environment is protected.

Description

technical field [0001] The invention relates to the technical field of bio-based polymer materials, in particular to a polyolefin composite material prepared by adding modified cyanobacteria. Background technique [0002] Plastic products have been widely used in various sectors of the national economy, mainly due to their advantages of light weight, good mechanical properties, water resistance and chemical corrosion resistance, beautiful appearance, convenient manufacturing and installation, and low price; according to statistics, the world's plastic products The total output is nearly 100 million tons, which accounts for more than 75% of the total volume of the three major synthetic materials, and the volume output ratio with steel reaches 92%. However, the chemical stability of traditional plastics is very good, and they can hardly be degraded in nature. When the plastics industry develops to a certain extent, more and more plastic wastes are discarded, almost to the exte...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08L23/14C08L23/12C08L91/00C08L89/04C08L23/08C08K5/09C08K5/20C08K5/134B29C47/92B29C48/92
CPCC08L23/06B29C48/92B29C2948/9259B29C2948/92704C08L23/14C08L2205/035C08L2205/08C08L2207/062C08L2207/066C08L89/04C08L91/00C08L23/0853C08K5/09C08K5/1345C08L23/0846C08K5/20
Inventor 王庆朱年青陈海燕
Owner 无锡太湖蓝藻资源应用技术研究院有限公司
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