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Preparation method of natural plant cellulose-modified PA6 composite material

A technology of natural plants and composite materials, applied in the field of preparation of natural plant cellulose modified PA6 composite materials, can solve the problems of limitation, poor dimensional stability, and the mechanical properties such as PA6 strength and modulus are not particularly prominent, and achieve thermal decomposition. The effect of temperature increase, high conversion rate and good comprehensive mechanical properties

Active Publication Date: 2012-02-01
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the comprehensive performance of PA6 is very excellent, due to the structure of the polymer material itself, the mechanical properties of PA6 such as strength and modulus are not particularly outstanding, and the dimensional stability is also poor, and the amide polar group in the PA6 molecular chain is extremely Easy to absorb water, which limits its application

Method used

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  • Preparation method of natural plant cellulose-modified PA6 composite material
  • Preparation method of natural plant cellulose-modified PA6 composite material
  • Preparation method of natural plant cellulose-modified PA6 composite material

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The preparation method of microcrystalline cellulose (MCC) modified PA6 composite material comprises the following steps:

[0032] (1) Weigh 0.5g of cotton linter microcrystalline cellulose, weigh 99.5g of CL and put it into a 250ml three-necked flask, then put a stirring magnet, nitrogen protection, put it into a strong magnetic stirrer, 85 ℃ Stir at constant temperature for 2h. MCC / CL suspension was obtained.

[0033] (2) Weigh 0.4g of sodium caprolactam (CLNa) into a 250ml single-necked flask, pour the MCC / CL suspension in (1) into this single-necked flask, heat to 140°C, distill under reduced pressure for 20min, remove A small amount of moisture in the system.

[0034] (3) Add accurately metered 0.4g 2,4-toluene diisocyanate (TDI, AR) to the single-necked flask of step (2), shake it up and pour it into a mold at 160° C., make CL thermostatically polymerized for 10 minutes and then take it out and put it away. Cooling at 50°C to obtain a microcrystalline cellulose...

Embodiment 2

[0036] The preparation method of microcrystalline cellulose (MCC) modified PA6 composite material comprises the following steps:

[0037] (1) Weigh 1g of cotton linter microcrystalline cellulose, weigh 99g of CL and put it into a 250ml three-necked flask, then put a stirring magnet, nitrogen protection, put it into a strong magnetic stirrer, and stir at a constant temperature of 85°C 2h. MCC / CL suspension was obtained.

[0038] (2) Weigh 0.4g of sodium caprolactam (CLNa) into a 250ml single-necked flask, pour the MCC / CL suspension in (1) into this single-necked flask, heat to 140°C, distill under reduced pressure for 20min, remove A small amount of moisture in the system.

[0039] (3) Add accurately measured 0.4g 2,4-toluene diisocyanate (TDI, AR), shake it up and pour it into a mold at 160°C, make CL constant temperature polymerization for 10min, take it out and put it into 50°C for cooling, to obtain the MCC content 1% microcrystalline cellulose (MCC) modified PA6 composi...

Embodiment 3

[0041] Microcrystalline cellulose (MCC) modified PA6 composite material and preparation method thereof, comprising the following steps:

[0042](1) Weigh 1.5g of cotton linter microcrystalline cellulose, weigh 98.5g of CL and put it into a 250ml three-necked flask, then put a stirring magnet, nitrogen protection, put it into a strong magnetic stirrer, 85 ℃ Stir at constant temperature for 2h. MCC / CL suspension was obtained.

[0043] (2) Weigh 0.4g of sodium caprolactam (CLNa) into a 250ml single-necked flask, pour the MCC / CL suspension in (1) into this single-necked flask, heat to 140°C, distill under reduced pressure for 20min, remove A small amount of moisture in the system.

[0044] (3) Add accurately measured 0.4g 2,4-toluene diisocyanate (TDI, AR), shake it up and pour it into a mold at 160°C, make CL constant temperature polymerization for 10min, take it out and put it into 50°C for cooling, to obtain the MCC content 1.5% microcrystalline cellulose (MCC) modified PA6 ...

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Abstract

The invention relates to a preparation method of a natural plant cellulose-modified PA6 composite material. The method comprises the following steps of: (1) dispersing the natural plant cellulose in a caprolactam monomer (CL); (2) removing water; and (3) polymerizing to obtain the natural plant cellulose-modified PA6 composite material. Compared with the prior art, the natural plant cellulose-modified PA6 composite material is prepared by adopting an in-situ polymerization method for the first time; the conversion rate of the caprolactam in the composite material is higher; compared with pure PA6, the natural plant cellulose-modified PA6 composite material has improved pyrolysis temperature; and the natural plant cellulose-modified PA6 composite material has better comprehensive mechanical property.

Description

technical field [0001] The invention relates to engineering plastics, in particular to a preparation method of a natural plant cellulose modified PA6 composite material. Background technique [0002] PA6 (Polyamide 6) is an engineering plastic that is widely used in industrial fields and daily life. In terms of use value, PA6 ranks first among the five major engineering plastics. It has excellent mechanical properties, wear resistance, acid and alkali resistance, self-lubrication, and has the advantages of low density, simple processing technology and low cost. Although the comprehensive properties of PA6 are very excellent, due to the structure of the polymer material itself, the mechanical properties such as strength and modulus of PA6 are not particularly outstanding, and the dimensional stability is also poor, and the amide polar groups in the PA6 molecular chain are extremely polar. It is easy to absorb water, which makes its application limited. In order to broaden t...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L1/02C08L1/08C08L1/28C08L1/26C08G69/16
Inventor 李宏林杨桂生吴玉程
Owner HEFEI GENIUS NEW MATERIALS