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A method for preparing bio-based plastics through esterification modification of lignocellulosic fibers

A technology for bio-based plastics and lignocellulose, which is applied in the field of preparing bio-based plastics by esterification of lignocellulose, can solve the problems of not obtaining bio-based plastics, poor effect, etc., achieves good mechanical properties of products, avoids strong corrosive reagents and Solvents, the effect of improving accessibility

Inactive Publication Date: 2016-01-20
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, such modifications have been ineffective and have not yielded injection-moldable bio-based plastics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing bio-based plastics by esterification modification of lignocellulosic biomass, the specific steps are:

[0026] (1) Take Husang twigs as raw materials, peel them, dry them, crush them, and dry them.

[0027] (2) Use a planetary ball mill to perform ball milling pretreatment on the raw materials, and the ball milling time is 4 hours. The material of the ball mill is agate, the capacity is 150mL, the amount of raw materials added is 3.0g, and the number of large, medium and small balls is 10, 20, and 60 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0028] (3) Take 6.0g of wood flour milled for 4 hours and put it into a 250ml three-neck flask, add 10.0g of tetraethylammonium chloride and 40.0g of dimethyl sulfoxide, and dissolve at 60°C for 1 hour.

[0029] (4) After the dissolution is complete, add 6.0 g of succinic anhydride and 0.24 g of 4-dimeth...

Embodiment 2

[0033] A method for preparing bio-based plastics by esterification modification of lignocellulosic biomass, the specific steps are:

[0034] (1) Use wheat straw as raw material, remove impurities, dry in the air, crush and dry.

[0035] (2) Use a planetary ball mill to perform ball milling pretreatment on the raw materials, and the ball milling time is 4 hours. The material of the ball mill is agate, the capacity is 150mL, the amount of raw materials added is 3.0g, and the number of large, medium and small balls is 10, 20, and 60 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0036] (3) Take 6.0 g of wheat straw powder after ball milling for 4 hours and put it into a 250 ml three-necked flask, add 10.0 g of tetraethylammonium chloride and 40.0 g of dimethyl sulfoxide, and dissolve at 60°C for 1 hour.

[0037] (4) After the dissolution is completed, add 20.0 g of dimethyl sulf...

Embodiment 3

[0041] A method for preparing bio-based plastics by esterification modification of lignocellulosic biomass, the specific steps are:

[0042] (1) Use the sage bark as the raw material, peel the bark, dry it, crush it, and dry it.

[0043] (2) Use a planetary ball mill to perform ball milling pretreatment on the raw materials, and the ball milling time is 4 hours. The material of the ball mill is agate, the capacity is 150mL, the amount of raw materials added is 3.0g, and the number of large, medium and small balls is 10, 20, and 60 respectively. The speed of ball milling is 580r / min, and there is no time interval between forward and reverse rotation; alternately every 90min.

[0044] (3) Take 6.0g of wood flour milled for 4 hours and put it into a 250ml three-necked flask, add 10.0g of tetraethylammonium chloride and 40.0g of dimethyl sulfoxide, and dissolve at 50°C for 1 hour.

[0045] (4) After the dissolution is completed, add 20.0 g of dimethyl sulfoxide solution dissolve...

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Abstract

The invention discloses a method for preparing bio-based plastic through esterification modification of wood fiber. The method comprises the following steps: drying and crushing wood fiber biomass; pretreating the powder by ball-milling; swelling and dissolving in a DMSO(Dimethylsulfoxide) / TEAC(Tetraethylammonium Chloride) solution system; adding SAA(Surface Active Agent) and DMAP(Dimethylaminopyridine) for reaction; dissolving out the reaction product by using acetone, standing, extracting and drying to acquire the bio-based plastic. The method mainly has the advantages that 1) the raw materials are wide in source and low in cost; 2) cellulose, hemicellulose and lignose in the wood fiber biomass are comprehensively utilized, and a traditional mode of simple modified utilization of cellulose through separation, extraction and modification is changed; 3) the traditional pretreatment mode through a chemical method is changed through the pretreatment by ball milling, so that the use of lots of highly corrosive reagents and solvents is avoided; 4) the reaction is carried out at normal temperature or low temperature, the reaction time is short, the modification process is simple and easy to operate, and the industrial application prospect is wide; 5) the modified product has good thermal plasticity and can be injected and molded into various plastic products with good mechanical properties.

Description

technical field [0001] The invention relates to the technical field of comprehensive utilization of bio-based materials and wood fibers, in particular to a method for preparing bio-based plastics through esterification and modification of wood fibers. Background technique [0002] With the continuous development of science and technology and social progress, people's demand for materials continues to increase, and their requirements and dependence on materials continue to increase, making materials the basis for the existence and development of human society. my country is a big country in material manufacturing and consumption. With the continuous deepening of reform and opening up and economic development, the material manufacturing and processing industry has become the main source of resource and energy consumption. In order to achieve the effective utilization of resources and sustainable development, it is of great significance to use renewable resources to produce pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08H8/00
Inventor 洪建国张小林许安骐李永海李小保叶菊娣陈健强高勤卫
Owner NANJING FORESTRY UNIV
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