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Preparation method of bio-based chinlon 5X fiber material

A fiber material, bio-based technology, applied in the field of fiber materials

Active Publication Date: 2020-12-22
THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of bio-based nylon 5X fiber material. The present invention adopts the biological method to prepare 1,5-pentanediamine, which solves the environmental problems caused by the preparation of hexamethylenediamine by the petroleum method, and is an independent development for our country. Nylon material lays the foundation

Method used

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  • Preparation method of bio-based chinlon 5X fiber material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] 1. Preparation of pentamethylenediamine monomer by biological method:

[0054] The lysine decarboxylase synthesized by Escherichia coli can biocatalyze the decarboxylation of L-lysine to obtain a mixed liquid fermentation liquid containing 1,5-pentanediamine, inorganic salts, sugars, proteins, bacteria and other metabolic organic substances , which is the 1,5-pentanediamine mixed liquor fermentation broth, add activated carbon with a mass percentage of 5% to the fermentation broth containing 1,5-pentamethylenediamine, and stir for 1 hour at 25°C for decolorization reaction After decolorization, add adipic acid of the same quality to the filtrate, react at 40°C for 40 minutes to obtain a mixed solution containing nylon salt, and concentrate the mixed solution 4 times under reduced pressure at 55°C and 110mmHg to obtain a concentrated solution. The temperature of the liquid was lowered to 3°C, and crystals were precipitated, and then crystals were obtained by centrifugati...

Embodiment 2

[0057] Embodiment 2, the preparation of PA56 with flame retardant effect

[0058] Example 1 of the present invention does not add additives when preparing pure PA56, but it is necessary to add different additives to produce PA56 with antistatic / flame retardant effects.

[0059] Using the nylon 56 salt prepared in Example 1 of the present invention, under the protection of a nitrogen atmosphere, a 50% nylon salt solution was prepared to adjust the pH value to 7.85. Add 5kg of the prepared nylon saline solution, 1.75g ​​of molecular weight modifier, and 1.75g ​​of flame retardant MAC (melamine cyanurate) into the reactor together. The temperature of the material outlet of the concentration tank: 119°C; Temperature: 265°C, outlet 1 temperature: 265°C, outlet 2 temperature: 265°C, reactor pressure 17.5MPa; pre-condensation heat medium temperature: 280°C, time 1.5h; post-condensation heat medium temperature: 280°C, time 10min, Post-poly vacuum: 65kPa; control spinning melt viscosi...

Embodiment 3

[0061] Embodiment 3, the preparation of nylon staple fiber

[0062] Step 2 in the embodiment of the present invention 1 of polymerization in front, there is change behind drafting, specifically as follows:

[0063] The drawing ratio and heating temperature are: the first drawing ratio is 2.78; the second drawing ratio is 1.05; the temperature of the first roll of the drawing box is 70°C; / min, the number of crimps is 15, and the nylon staple fibers are obtained by cutting. The mechanical properties of the staple fibers are shown in Table 2.

[0064] testing method:

[0065] 1. Linear density is tested according to GB / T14335-2008;

[0066] 2. Strong elongation: breaking strength and breaking elongation are tested according to GB / T14337-2008;

[0067] 3. The limiting oxygen index is tested according to GB / T5454-1997;

[0068] 4. The melting enthalpy (ΔH) of the fiber is tested by differential scanning calorimetry (DSC) f ), melting point (T m ), crystallinity (X c );

[...

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Abstract

The invention discloses a preparation method of a bio-based chinlon 5X fiber material. The preparation method comprises the following steps that 1), 1,5-pentanediamine mixed fermentation liquor and binary acid are mixed and subjected to polymerization reaction to obtain polyamide salt mixed liquor, and the polyamide salt mixed liquor is treated to obtain polyamide salt, wherein the 1,5-pentanediamine mixed fermentation liquor is mixed fermentation liquor obtained by preparing 1,5-pentanediamine through a biological method; 2), polymerization reaction is carried out on the aqueous solution of the polyamide salt and a molecular weight regulator to obtain a polyamide 5X polymer; and 3), the melt of the chinlon 5X polymer is sprayed through a spinneret plate to obtain a melt trickle, the melttrickle is cooled and solidified to form filaments, and fiber post-processing is carried out on the solidified filaments to obtain the bio-based chinlon 5X fiber material. According to the preparationmethod, dibasic acid is added into the 1,5-pentanediamine mixed fermentation liquid for reaction, polyamide salt can be directly obtained, the conversion rate can be increased, energy consumption canbe reduced, and the problem of environmental pollution can be avoided; and the polyamide salt mixed solution is purified to obtain polyamide salt crystals for subsequent reaction, so that side reaction is avoided.

Description

technical field [0001] The invention relates to a preparation method of a bio-based nylon 5X fiber material, which belongs to the field of fiber materials. Background technique [0002] Nylon is a very important engineering material with outstanding properties such as good wear resistance, corrosion resistance, high fatigue strength and breaking strength, and easy dyeing. At present, common nylons include PA6, PA66, PA1010, PA1212, etc. Among them, PA6 and PA66 have the largest output. Nylon itself or combined with other polymers is often used in the fields of engineering plastics, fibers and films. At present, although the nylon material widely used in my country has a relatively mature technology and a large output, its production raw materials are basically made of petroleum derivatives. The entire synthesis process is complicated and there is a certain degree of pollution. Moreover, foreign companies control the production technology and patents of hexamethylenediamine,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/60D01F6/90D01F1/07C07C209/00C07C211/09C07C51/41C07C55/14C07C51/43C07C209/84C08G69/26
CPCD01F6/60D01F6/90D01F1/07C07C209/00C07C51/412C07C51/43C07C209/84C08G69/26C07C211/09C07C55/14
Inventor 郝新敏郭亚飞梁高勇闫金龙乔荣荣
Owner THE QUARTERMASTER RES INST OF THE GENERAL LOGISTICS DEPT OF THE CPLA
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