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A method for preparing lignocellulosic bio-based plastics

A technology for bio-based plastics and wood fibers, which is applied in the field of preparing lignocellulosic bio-based plastics, can solve the problems of difficulty in preparing plastics, low resource utilization, serious degradation, etc., and achieves simple and easy operation, high resource utilization, The effect of a small amount of ionic liquid

Inactive Publication Date: 2015-12-30
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first type of material, that is, plastic wood, is still based on synthetic petroleum-based resin, which is still difficult to biodegrade, has poor environmental friendliness, and has not fundamentally changed its dependence on petroleum resources.
In addition, the interface compatibility between wood fiber and resin in plastic wood is poor, and the mechanical strength of wood fiber / resin composite material is not high, which limits the application of composite materials.
The second type of material only uses one component of wood fiber, which not only has low resource utilization rate, serious waste of resources, but also causes environmental pollution.
[0005] The above-mentioned modification is to replace the hydroxyl group on the molecule through chemical reaction, the process is relatively complicated, it is easy to cause environmental pollution, the wood fiber is dissolved or the degradation is serious during the reaction process, and the molding and processing performance of the modified product is not good, so it is difficult to prepare it into plastic

Method used

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  • A method for preparing lignocellulosic bio-based plastics

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A method for preparing lignocellulosic bio-based plastics using quaternary ammonium salts, the specific steps are:

[0031] 1) Use hibiscus branches as raw materials, peel, dry, and mechanically crush and dry.

[0032] 2) A planetary ball mill is used to pre-process the raw materials by ball milling, and the ball milling time is 4 hours. The material of the ball mill tank is agate, the capacity is 250mL, the amount of raw materials added is 8g, and the number of large, medium and small balls is 20, 50, and 100 respectively. The ball milling speed is 580r / min, and there is no time interval between forward and reverse rotation; it alternates every 30min.

[0033] 3) Dissolve 40g of tetraethylammonium chloride in 640g of dimethylsulfoxide, add 80g of ball-milled wood fiber, stir and mix well to prepare a mixed solution.

[0034] 4) Add the mixed solution to the kneader, knead for 4 hours at a material temperature of 100°C, connect to the condensation recovery device and continue ...

Embodiment 2

[0038] A method for preparing lignocellulosic bio-based plastics using ionic liquids, the specific steps are:

[0039] 1) Use hibiscus branches as raw materials, peel, dry, and mechanically crush and dry.

[0040] 2) A planetary ball mill is used to pre-process the raw materials by ball milling, and the ball milling time is 4 hours. The material of the ball mill tank is agate, the capacity is 250mL, the amount of raw materials added is 8g, and the number of large, medium and small balls is 20, 50, and 100 respectively. The ball milling speed is 580r / min, and there is no time interval between forward and reverse rotation; it alternates every 30min.

[0041] 3) Mix 20 g of 1-ethyl-3-methylimidazole acetate with 640 g of dimethyl sulfoxide, add 80 g of ball-milled wood fiber, stir and mix to prepare a mixed solution.

[0042] 4) Add the mixed solution to the kneader, knead the material at 90℃ for 4 hours, connect to the condensation recovery device and continue kneading until the materi...

Embodiment 3

[0046] A method for preparing lignocellulosic bio-based plastics using ionic liquids, the specific steps are:

[0047] 1) Use hibiscus branches as raw materials, peel, dry, and mechanically crush and dry.

[0048] 2) A planetary ball mill is used to pre-process the raw materials by ball milling, and the ball milling time is 4 hours. The material of the ball mill tank is agate, the capacity is 250mL, the amount of raw materials added is 8g, and the number of large, medium and small balls is 20, 50, and 100 respectively. The ball milling speed is 580r / min, and there is no time interval between forward and reverse rotation; it alternates every 30min.

[0049] 3) Dissolve 20g of 1-ethyl-3-methylimidazole acetate and 10g of tetraethylammonium chloride in 640g of dimethylsulfoxide, add 20g of ball-milled wood fiber, stir and mix well to prepare a mixed solution.

[0050] 4) Add the mixed solution to the kneader, knead the material at 90℃ for 4 hours, connect to the condensation recovery de...

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Abstract

The invention discloses a preparation method of wood fiber bio-based plastic. The preparation method comprises the steps: firstly, carrying out drying and crushing pretreatment on a wood fiber biomass; then, carrying out ball milling pretreatment; next, mixing the ball milled wood fiber raw material and an ionic liquid / dimethyl sulfoxide or quaternary ammonium salt / dimethyl sulfoxide solution; then, placing the mixture into a kneading machine for kneading; recovering dimethyl sulfoxide in the kneading process, and obtaining the wood fiber bio-based plastic after the kneading is ended. The method is wide in raw material source, low in raw material cost and high in resource utilization ratio; a three-dimensional meshy structure of lignin is damaged through ball milling in advance, so that the attainability of a reagent is greatly increased, and a great number of highly-corrosive reagents and solvents are avoided; the quaternary ammonium salt or ionic liquid can be penetrated among molecular chains of cellulose by means of the powerful shearing force of the kneading machine, little ionic liquid is used, and the wood fiber bio-based plastic can be extruded to be granulated and also be subjected to injection molding; the preparation method is environment-friendly, simple in process and easy to operate.

Description

Technical field [0001] The invention belongs to the field of utilization of lignocellulosic biomass resources, and specifically relates to a method for preparing lignocellulosic bio-based plastics. Background technique [0002] In recent years, as the total amount of non-renewable resources such as oil and coal has been declining and a series of problems such as environmental pollution caused by the corresponding development of petrochemical products have become increasingly prominent, the abundant and renewable biomass has been converted into new energy. , New materials and chemical products have become a hot spot for research and development in countries around the world. my country’s biomass production exceeds 2.1 billion tons per year, and its reserves are very rich. There are more than 700 million tons of crop straws each year. The lignocellulosic biomass in a large number of agricultural and forestry wastes in my country, such as branches, wood chips, shavings, straw, rice...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L97/02C08H7/00
Inventor 洪建国陈肖杨蕊叶菊娣李小保陈健强高勤卫
Owner NANJING FORESTRY UNIV