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Glucose-modified polyimide fiber and preparation method thereof

A polyimide fiber, glucose technology, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve the problem of polyimide fiber damage, high cost, inability to meet polyimide fiber processability and Adhesion and other issues to achieve the effect of improving processability and adhesion and expanding applications

Inactive Publication Date: 2019-09-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these modification methods are costly and cause great damage to polyimide fibers, which cannot meet the further application of polyimide fibers in enhancing processability and adhesion.

Method used

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  • Glucose-modified polyimide fiber and preparation method thereof
  • Glucose-modified polyimide fiber and preparation method thereof
  • Glucose-modified polyimide fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Step 1: Dissolve 0.3g of sodium dodecylbenzenesulfonate in 1L of deionized water, add 0.3g of polyimide fiber, stir at 60°C for 1 hour, wash with deionized water for 5 times, and in 105°C Dry 12h in the blast drying oven to obtain clean polyimide fibers;

[0040] Step 2, mixing 0.2 g of the polyimide fiber obtained in step (1) with a glucose solution with a concentration of 0.15 mol / L, the volume of the glucose solution is 60 mL, and stirring for 15 min to obtain a reaction system;

[0041] Step 3, the reaction system obtained by stirring in step 2 is placed in a 100mL polytetrafluoroethylene lining, and after a hydrothermal reaction in a blast drying oven at 180°C for 12 hours, the modified polyimide fiber is obtained;

[0042]In step 4, the polyimide fiber obtained in step 3 was washed with deionized water for 7 times, and then dried in a blast drying oven at 105° C. for 12 hours, and glucose-modified polyimide fiber was successfully prepared.

[0043] see figure 1 ...

Embodiment 2

[0045] Step 1, dissolve 0.2g sodium dodecylbenzenesulfonate in 1.2L deionized water, add 0.3g polyimide fiber, stir at 40°C for 0.5h, wash with deionized water 10 times, and Dry in a blast drying oven at ℃ for 24 hours to obtain clean polyimide fibers;

[0046] Step 2, mixing 0.1 g of the polyimide fiber obtained in step (1) with a glucose solution with a concentration of 0.28 mol / L, the volume of the glucose solution is 40 mL, and stirring for 10 min to obtain a reaction system;

[0047] Step 3, the reaction system obtained by stirring in step 2 is placed in a 100mL polytetrafluoroethylene lining, and after a hydrothermal reaction in a blast drying oven at 160°C for 24 hours, the modified polyimide fiber is obtained;

[0048] In step 4, the polyimide fiber obtained in step 3 was washed 5 times with deionized water, and then dried in an air-blast drying oven at 80° C. for 24 hours, and glucose-modified polyimide fiber was successfully prepared.

Embodiment 3

[0050] Step 1: Dissolve 0.4g of sodium dodecylbenzenesulfonate in 1.5L of deionized water, add 0.5g of polyimide fiber, stir at 80°C for 1.5h, wash with deionized water for 7 times, and Dry in a blast drying oven at ℃ for 20 hours to obtain clean polyimide fibers;

[0051] Step 2, mixing 0.3 g of the polyimide fiber obtained in step (1) with a glucose solution with a concentration of 0.07 mol / L, the volume of the glucose solution is 80 mL, and stirring for 20 minutes to obtain a reaction system;

[0052] Step 3, the reaction system obtained by stirring in step 2 is placed in a 100mL polytetrafluoroethylene lining, and after a hydrothermal reaction in a blast drying oven at 200°C for 20 hours, the modified polyimide fiber is obtained;

[0053] In step 4, the polyimide fibers obtained in step 3 were washed with deionized water for 10 times, and then dried in a blast drying oven at 90° C. for 20 hours, and glucose-modified polyimide fibers were successfully prepared.

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Abstract

The invention discloses a glucose-modified polyimide fiber and a preparation method thereof. Carbon spheres are attached to the surface of the glucose-modified polyimide fiber, the fiber does not depend on a matrix material, and the amorphous carbon spheres attached to the surface have abundant hydroxyl and carboxyl groups, so that the surface of the whole polyimide fiber has a large number of active groups (the hydroxyl and carboxyl groups), and the processability and cohesiveness of the matrix material-polyimide fiber can be effectively improved; application of the fiber in composite materials is further expanded. According to the preparation method, glucose which is low in cost and easy to purchase is adopted as a modifier and a carbon source, the nano carbon spheres are subjected to in-situ synthesis on the surface of the polyimide fiber, and the surfaces of the carbon spheres have the carboxyl and hydroxyl groups, so that the active groups on the surface of the whole polyimide fiber are greatly increased; according to the preparation method, an organic solvent is not used, the glucose which is low in cost, wide in source and environmentally friendly is adopted as the carbon source, and environmental protection requirements are met.

Description

【Technical field】 [0001] The invention belongs to the technical field of polyimide fibers, and in particular relates to a glucose-modified polyimide fiber and a preparation method thereof. 【Background technique】 [0002] Polyimide fibers have unique thermal stability, excellent radiation resistance, flame resistance, dielectric properties, good chemical properties and impact resistance, and have been widely used in aerospace, microelectronics, liquid crystal display, nanotechnology gas Separation membrane, laser and composite materials and other fields. However, polyimide fibers have smooth surface and low active sites, resulting in poor processability and poor adhesion, which limit their application in the field of reinforcement. Therefore, it is necessary to modify the surface of polyimide fiber to improve its processability and adhesion, so that it can be applied in more fields. [0003] In recent years, the modification methods of polyimide fibers mainly include plasma...

Claims

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Application Information

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IPC IPC(8): D06M11/74D06M13/256D06M101/30
CPCD06M11/74D06M13/256D06M2101/30
Inventor 陆赵情宁逗逗谢璠花莉王丹妮陈珊珊王亚芳贾峰峰
Owner SHAANXI UNIV OF SCI & TECH
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