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Bio-based wheat straw polypropylene composite material and preparation method thereof

A wheat straw and composite material technology, which is applied in the field of bio-based wheat straw polypropylene composite materials and its preparation, can solve the problems of increased material or product cost, material performance deterioration, environmental pollution, etc., and achieves increased surface energy, ease of processing , the effect of reducing pollution

Inactive Publication Date: 2018-03-06
瑞年科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent (Application No. 201210167452.X) introduces a method of blending polypropylene with nano-inorganic powder to increase the polarity of polypropylene, but this method needs to add a large amount of nano-inorganic powder to polypropylene, which undoubtedly increases The cost of materials or products is reduced; Chinese patent (application number 201410375294.6) introduces the treatment of polypropylene by supercritical carbon dioxide fluid containing polar monomers and initiators, and then grafts the treated polypropylene material, but During the grafting process, the degradation of polypropylene macromolecules is prone to side reactions that degrade the material properties. Although the addition of comonomers during the grafting process can reduce the degradation side reactions, comonomers may induce polypropylene macromolecular crosslinking. and affect the processability of polypropylene materials
A considerable part of cellulose-rich wheat straw is incinerated, which not only causes waste of resources, but also seriously pollutes the environment

Method used

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  • Bio-based wheat straw polypropylene composite material and preparation method thereof

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Embodiment 1

[0030] A bio-based wheat straw polypropylene composite material, which is composed of the following components by mass fraction: PP material 20%, PE material 15%, wheat straw 55%, ethylene-octene copolymer 4%, maleic anhydride grafted polypropylene 6%.

[0031] The preparation steps of the bio-based wheat straw polypropylene composite material are as follows:

[0032] A. Wash and crush 1Kg of straw and add it to 2L of sodium hydroxide solution with a mass fraction of 2%, soak it at 40°C for 8 hours, and add a solubility of 0.5mol L -1 acetic acid solution to a pH of 7; clean the neutralized stalks, place them in a hydrothermal reactor at a constant temperature of 120°C for 5 hours, cool to room temperature, take them out, wash them with water, and dry them in vacuum to obtain 0.85 Kg of treated stalks;

[0033] B. Weigh 0.85Kg of treated plant straw, 0.3Kg of PP material, 0.25Kg of PE material, 0.06Kg of ethylene-octene copolymer and 0.09Kg of maleic anhydride grafted polypro...

Embodiment 2

[0035] A bio-based wheat straw polypropylene composite material, which consists of the following components by mass fraction: PP material 25%, PE material 15%, wheat straw 52%, ethylene-vinyl acetate copolymer 3%, maleic anhydride grafted polypropylene 5%.

[0036] The preparation steps of the bio-based wheat straw polypropylene composite material are as follows:

[0037] A. Wash and crush 2Kg of straw and add it to 4L of 3% sodium hydroxide solution, soak it at 45°C for 10 hours, and add a solubility of 0.8mol L -1 acetic acid solution to a pH of 7; clean the neutralized stalks, place them in a hydrothermal reactor at a constant temperature of 140°C for 8 hours, cool to room temperature, take them out for washing, and vacuum dry to obtain 1.8Kg of treated stalks;

[0038]B. Weigh 1.8Kg of treated plant straw, 0.9Kg of PP material, 0.52Kg of PE material, 0.1Kg of ethylene-vinyl acetate copolymer and 0.18Kg of maleic anhydride grafted polypropylene according to the mass ratio ...

Embodiment 3

[0040] A bio-based wheat straw polypropylene composite material, which consists of the following components by mass fraction: PP material 26%, PE material 10%, wheat straw 58%, ethylene-butene copolymer 2%, maleic anhydride grafted polypropylene 4%.

[0041] The preparation steps of the bio-based wheat straw polypropylene composite material are as follows:

[0042] A. Wash and crush 2Kg of straw and add it to 4L of 4% sodium hydroxide solution, soak it at 50°C for 15 hours, and add a solubility of 1.0 mol L -1 acetic acid solution to a pH of 7; clean the neutralized stalks, place them in a hydrothermal reactor at a constant temperature of 150°C for 10 hours, cool to room temperature, take them out, wash them with water, and dry them in vacuum to obtain 1.8Kg of treated stalks;

[0043] B. Weigh 1.8Kg of treated plant straw, 0.8Kg of PP material, 0.32Kg of PE material, 0.06Kg of ethylene-butene copolymer and 0.12Kg of maleic anhydride grafted polypropylene wax according to the...

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Abstract

The invention discloses a bio-based wheat straw polypropylene composite material and a preparation method thereof. The bio-based wheat straw polypropylene composite material comprises the following components in percentage by mass: 20-30% of a PP (Polypropylene) material, 10-20% of a PE material, 50-60% of wheat straws, 2-5% of a flexibilizer and 3-6% of a compatilizer. The bio-based wheat straw polypropylene composite material prepared in the invention can be printed to be made into shopping bags, shower curtains, tablecloth, decorative lighting and other household daily supplies, has faint scent of plants, does not have smell of ordinary plastic products, is degradable, can be directly contacted with foods, is environmental-friendly and has excellent application potential and wide industrial production value.

Description

technical field [0001] The invention belongs to the field of bio-environmental protection composite materials, and in particular relates to a bio-based wheat straw polypropylene composite material and a preparation method thereof. Background technique [0002] Polypropylene material is widely used in various aspects such as industry, agriculture, and life because of its advantages such as low density, high mechanical strength, good chemical resistance, low price, and easy molding. But at the same time, the chemical inertness and surface energy of polypropylene materials are very low, and the plastic products made of them are difficult to print on the surface, and the large-scale application of polypropylene materials not only brings great convenience to human production and life, but also Serious white pollution has been caused to the existing environment, and it is an urgent technical problem to be solved by those skilled in the art to find a degradable polypropylene compos...

Claims

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Application Information

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IPC IPC(8): C08L97/02C08L23/12C08L23/06C08L23/08C08L51/06
Inventor 王家福
Owner 瑞年科技(广东)有限公司
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