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Preparation method of hyperbranched compound modified dyeable polyimide fiber

A technology of polyimide fiber and polyimide, which is applied in the field of preparation of dyeable polyimide fiber modified by hyperbranched compounds, can solve the problems of limited application of textiles and difficult dyeing of polyimide fiber, and achieve Improve wearing comfort, improve antistatic performance, and improve mechanical properties

Active Publication Date: 2018-06-08
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, at present, polyimide fibers are difficult to dye, and their textile applications are greatly limited.

Method used

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  • Preparation method of hyperbranched compound modified dyeable polyimide fiber
  • Preparation method of hyperbranched compound modified dyeable polyimide fiber
  • Preparation method of hyperbranched compound modified dyeable polyimide fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: a kind of preparation method of hyperbranched compound modification dyeable polyimide fiber, comprises the following steps:

[0028] (1) Mix 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and triaminobenzene according to the molar ratio of anhydride and amino group of 1:2, and carry out polymerization reaction in a polymerization kettle at a reaction temperature of 60 ℃, the reaction vacuum is less than 0.1 atmospheric pressure to ensure that the water generated by the reaction is drawn out, which is beneficial to the positive reaction. The reaction time is 9 hours, and the hyperbranched compound is prepared;

[0029] (2) The hyperbranched compound obtained in step (1) is purified by filtration, and added to the polyimide polymerization solution for polymerization reaction, the polymerization reaction is protected by nitrogen, the polymerization temperature is -5 ° C, and the polymerization reaction time is 10 hours; The polyimide polymerization solu...

Embodiment 2

[0033] Embodiment 2: a kind of preparation method of hyperbranched compound modification dyeable polyimide fiber, comprises the following steps:

[0034] (1) Mix 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and triethanolamine according to the molar ratio of anhydride and amino group at 2:1, and carry out polymerization reaction in a polymerization kettle at a reaction temperature of 180°C , the reaction vacuum is less than 0.1 atmospheric pressure to ensure that the water generated by the reaction is drawn out, which is beneficial to the positive reaction. The reaction time is 3 hours, and the hyperbranched compound is prepared;

[0035](2) The hyperbranched compound obtained in step (1) is purified by filtration, and added to the polyimide polymerization solution to carry out polymerization reaction, the polymerization reaction adopts nitrogen protection, the polymerization temperature is 5 ° C, and the polymerization reaction time is 2 hours; The polyimide polymeriz...

Embodiment 3

[0039] Embodiment 3: a kind of preparation method of hyperbranched compound modification dyeable polyimide fiber, comprises the following steps:

[0040] (1) Mix 3,3′,4,4′-biphenyltetracarboxylic dianhydride (BPDA) and diethanolamine according to the molar ratio of anhydride and amino group at 1:1, and carry out polymerization reaction in a polymerization kettle at a reaction temperature of 100°C , the reaction vacuum is less than 0.1 atmospheric pressure to ensure that the water generated by the reaction is drawn out, which is beneficial to the positive reaction. The reaction time is 6 hours, and the hyperbranched compound is prepared;

[0041] (2) The hyperbranched compound obtained in step (1) is purified by filtration, and added to the polyimide polymerization solution to carry out polymerization reaction, the polymerization reaction adopts nitrogen protection, the polymerization temperature is 0 ° C, and the polymerization reaction time is 5 hours; The polyimide polymeriz...

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Abstract

The invention relates to a preparation method for a hyperbranched compound modified dyeable polyimide fiber. The preparation method is characterized by comprising the following steps: (1) carrying out a polymerization reaction between aromatic dianhydride and a dihydroxyl or trihydroxyl or amino compound in a polymerizer to prepare a hyperbranched compound; (2) purifying the hyperbranched compound, then adding the purified hyperbranched compound into a polyimide polymer solution for a polymerization reaction, wherein the polyimide polymer solution consists of monomer 3,3',4,4'-biphenyl tetracarboxylic anhydride (BPDA) and monomer p-phenylenediamine (PDA); (3) adopting a polymerization reaction product obtained in the step (2) to perform spinning so as to prepare the polyimide fiber. According to the preparation method, as the hyperbranched compound is added for modification to enable polyimide fiber to produce lots of active groups, and the aggregation mode of polyimide macromolecules is changed, the binding force and the dyeing rate of dye molecules are increased, and accordingly, the dyeable polyimide fiber is obtained.

Description

technical field [0001] The invention relates to a method for preparing dyeable polyimide fibers modified by hyperbranched compounds, and belongs to the technical field of functional textile materials. Background technique [0002] Polyimide has good mechanical properties, and can withstand temperatures as high as 400°C, and can maintain normal performance at ultra-low temperatures below -200°C. It also has good insulation properties. It can be said that the overall performance is very good. Due to these good properties, the development prospect of polyimide is also very impressive. [0003] According to the different monomers that make up polyimide, polyimide can be divided into aliphatic polyimide without benzene ring, a semi-aromatic polyimide with monomer containing benzene ring and two kinds of mono There are three types of aromatic polyimides containing benzene rings. According to thermal properties, it can be divided into thermoplastic and thermosetting polyimides. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/74D06P1/16D06P3/02C08G73/10C08G63/127
CPCC08G63/127C08G73/1003C08G73/1007C08G73/1067D01F6/74D06P1/16D06P3/02
Inventor 刘水平傅佳佳鲁双
Owner JIANGNAN UNIV
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