Method for manufacturing degradable plastics through wood meal modification

A technology for degrading plastics and wood powder, which is applied in the field of degradable plastics preparation, can solve the problems of tediousness and increased production costs, and achieve the effects of wide sources, low cost and environmental friendliness

Inactive Publication Date: 2016-01-06
ZHEJIANG SCI-TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this requires multiple processing procedures, which is not only cumbersome, but also greatly increases production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment 1: adopt following steps:

[0012] A) At room temperature, soak the wood powder with a particle size of 220 mesh in a 1:2 weight ratio in a sodium carbonate solution of 10% by weight, stir for 24 hours, then vacuum filter, and wash the wood powder with deionized water until neutral. Naturally air-dry at 10°C for 24 hours;

[0013] B) Put acetyl tributyl citrate and the wood powder obtained in step A) into the internal mixer according to the mass ratio of 5:3, and add 0.1 part of lead isosulfate as a catalyst, and keep the rotor speed at 40 rpm Every minute, control the temperature at 110°C, and react in the internal mixer for 60 minutes;

[0014] C) The product obtained in step B) is soaked and washed with 1.5 parts of toluene, and then filtered with a vacuum filter to remove unreacted acetyl tributyl citrate and other by-products;

[0015] D) Soak and wash the product treated by step C) with a sodium carbonate solution with a concentration of 10% by weight...

Embodiment 2

[0016] Embodiment 2: adopt following steps:

[0017] A) At room temperature, soak the wood powder with a particle size of 300 mesh in a 1:2 weight ratio in a sodium carbonate solution of 13% by weight, stir for 24 hours, then vacuum filter, and wash the wood powder with deionized water until neutral. Naturally air-dry at 25°C for 24 hours;

[0018] B) Take acetyl tributyl citrate and the wood powder obtained in step A) and put them into the internal mixer according to the mass ratio of 5:3, and add 0.1 part of lead isosulfate as a catalyst to keep the rotor speed at 40~ 60 revolutions per minute, control the temperature at 150°C, and react in the internal mixer for 50 minutes;

[0019] C) The product obtained in step B) is soaked and washed with 1.5 parts of toluene, and then filtered with a vacuum filter to remove unreacted acetyl tributyl citrate and other by-products;

[0020] D) Use a sodium carbonate solution with a concentration of 13% by weight to soak and wash the pr...

Embodiment 3

[0021] Embodiment 3: adopt following steps:

[0022] A) At room temperature, soak the wood powder with a particle size of 350 meshes in a 1:2 weight ratio in a sodium carbonate solution with a concentration of 15% by weight, stir for 24 hours, then vacuum filter, and wash the wood powder with deionized water until neutral. Naturally air-dry at 35°C for 24 hours;

[0023] B) Put acetyl tributyl citrate and the wood powder obtained in step A) into the internal mixer according to the mass ratio of 5:3, and add 0.1 parts of lead isosulfate as a catalyst, and keep the rotor speed at 60 rpm Every minute, control the temperature at 180 ° C, and react in the internal mixer for 45 minutes;

[0024] C) The product obtained in step B) is soaked and washed with 1.5 parts of toluene, and then filtered with a vacuum filter to remove unreacted acetyl tributyl citrate and other by-products;

[0025] D) Soak and wash the product treated by step C) with a sodium carbonate solution with a conc...

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Abstract

The invention discloses a method for manufacturing degradable plastics through wood meal modification. According to the method, wood meal is directly used as raw materials and is directly processed. The method concretely comprises the following steps that (A) at the room temperature, the wood meal is soaked by a sodium carbonate solution; stirring is carried out; then, vacuum suction filtration is performed; the materials are washed to the neutral state and are dried in the air; (B) acetyl tributyl citrate is taken; the acetyl tributyl citrate and the wood meal obtained in the step (A) are fed into a internal mixer according to a mass ratio being 5:3, in addition, catalysts are added, the conditions are controlled so that the reaction is taken; (C) a product obtained in the step (C) is soaked and washed by methylbenzene and is subjected to suction filtration; (D) the sodium carbonate solution is used for soaking and washing and suction filtration; then, the obtained product is subjected to vacuum drying for 1 to 2 days at 80 DEG C to obtain the finial modified wood meal plastics. The method has the advantages that the used raw materials are waste material wood meal in wood industry; the resources are wide; the price is low; in addition, the operation process is simple and convenient; the method is suitable for industrial production and preparation; in addition, the product has the advantages of environment-friendly performance, easy degradation, low cost and the like.

Description

technical field [0001] The invention belongs to the field of degradable plastic preparation, and in particular relates to a method for preparing degradable plastic by using acetyl tributyl citrate and wood powder cellulose as main raw materials. Background technique [0002] With the ever-changing development of human society, there are a large number of wood products on the market. However, a large amount of wood powder is bound to be produced in the process of processing wood. At present, the processing methods of wood powder by major wood manufacturers are very primitive, such as fermentation production Natural gas, landfill, fertilizer, fuel, etc. However, there is no method that can generate more commercial value through secondary processing. Wood flour is rich in cellulose, and cellulose molecules contain a large number of hydroxyl groups, which are easy to form hydrogen bonds within and between molecules, which leads to poor thermoplasticity of cellulose; there are co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08K5/11
Inventor 刘建军王秉万军民
Owner ZHEJIANG SCI-TECH UNIV
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