Polyimide fiber with multi-block structure and preparation method and application thereof

A polyimide fiber, multi-block technology, applied in the field of polyimide fiber with multi-block structure and its preparation, to achieve excellent mechanical properties, environmentally friendly process, and the effect of being conducive to mass production

Active Publication Date: 2019-08-23
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In view of not seeing the report of similar anti-neutron radiat

Method used

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  • Polyimide fiber with multi-block structure and preparation method and application thereof
  • Polyimide fiber with multi-block structure and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Under nitrogen protection, in a 250mL three-necked flask, add 120mL of NMP, 7.8g (0.04mol) of 6,8-adamantanediamine (Sinopharm Reagent, analytically pure), 10g (0.045mol)1, 2,4,5-Cyclohexanetetracarboxylic dianhydride (hydrogenated PMDA, Changzhou Sunshine Pharmaceutical Co., Ltd., analytically pure) was stirred and reacted at 5°C for 10 h to obtain solution A.

[0039] (2) Under nitrogen protection, in a 500mL three-necked flask, add 120mL of NMP, 9.4g (0.045mol) of 2-(3,5-diaminophenyl)malonic acid (Sinopharm Reagent, analytically pure), 12.9 g (0.04 mol) of 3,3',4,4'-benzophenonetetra-acid dianhydride (BTDA, Changzhou Sunshine Pharmaceutical Co., Ltd., analytical grade) was stirred and reacted at 5° C. for 10 h to obtain solution B.

[0040] (3) Under the protection of nitrogen, pour solution A in step (1) into solution B in step (2), continue to stir at 5°C for 6h, then react at 125°C, 145°C, and 165°C for 1h at each constant temperature, and finally Raise the ...

Embodiment 2

[0045](1) Under nitrogen protection, in a 250mL three-necked flask, add 130mL of DMAc, 8.32g (0.043mol) of 3,7-adamantanediamine (Sinopharm Reagent, analytically pure), 12g (0.054mol) of hydrogenated PMDA (Changzhou Sunshine Pharmaceutical Co., Ltd., analytically pure), stirred and reacted at 5°C for 8 hours to obtain solution A.

[0046] (2) Under nitrogen protection, in a 500mL three-necked flask, add 140mL of DMAc, 11.5g (0.054mol) of 2-(3,5-diaminophenyl)malonic acid (Sinopharm Reagent, analytically pure), 13.8 g (0.043 mol) of 3,3',4,4'-benzophenonetetraacid dianhydride (BTDA, Changzhou Sunshine Pharmaceutical Co., Ltd., analytically pure) was stirred and reacted at 5°C for 8 hours to obtain solution B.

[0047] (3) Under the protection of nitrogen, pour solution A in step (1) into solution B in step (2), continue to stir at 5°C for 6h, then react at 125°C, 145°C, and 165°C for 1h at each constant temperature, and finally Raise the temperature to 185° C. and react for 18...

Embodiment 3

[0052] (1) Under the protection of nitrogen, in a 250mL three-necked flask, add 125mL of NMP, 7.43g (0.038mol) of 4,6-adamantanediamine (Sinopharm Reagent, analytically pure), 15g (0.077mol) of cyclobutane Alkanedianhydride (Changzhou Sunshine Pharmaceutical Co., Ltd., analytically pure) was stirred and reacted at 5°C for 9 hours to obtain solution A.

[0053] (2) Under the protection of nitrogen, in a 500mL three-necked flask, add 160mL of NMP, 16.0g (0.077mol) of 2-(3,5-diaminophenyl)malonic acid (Sinopharm Reagent, analytically pure), 12.3 g (0.038 mol) of 2,3',3,4'-benzophenone tetraacid dianhydride (Changzhou Sunshine Pharmaceutical Co., Ltd., analytically pure) was stirred and reacted at 5° C. for 9 h to obtain solution B.

[0054] (3) Under the protection of nitrogen, pour solution A in step (1) into solution B in step (2), continue to stir at 5°C for 6h, then react at 125°C, 145°C, and 165°C for 1h at each constant temperature, and finally Raise the temperature to 185...

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Abstract

The invention relates to polyimide fiber with multi-block structure and a preparation method and application thereof. The preparation method includes: allowing adamantane structure containing aliphatic diamine monomer to react with hydrogenated dianhydride containing monomer to obtain a solution A; allowing carboxyl side chain containing diamine monomer to react with diphenylketone structure containing dianhydride monomer to obtain a solution B; allowing the solution A to be in polymerization reaction with the solution B, adding heavy element ion salt for complexing, finally spinning, and performing thermal treatment. The method is simple in operation, environment-friendly in process, conducive to large-scale preparation and great in industrialization prospect; the polyimide fiber obtainedby the method has good neutron radiation resistant effect and excellent mechanical performance, heat resistance, solvent resistance, radiation resistance and corrosion resistance and can be applied in special environments with nuclear radiation and electromagnetic radiation.

Description

technical field [0001] The invention belongs to the field of polyimide fiber and its preparation and application, in particular to a polyimide fiber with multi-block structure and its preparation method and application. Background technique [0002] As an important clean energy, nuclear energy plays an important role in ensuring energy supply and realizing low-carbon and clean energy development. At the same time, various ionizing radiations are produced in the process of nuclear fission and fusion, thereby endangering the environment and human health. Especially in fields such as emergency repair of nuclear radiation accidents, maintenance of radioactive equipment in nuclear power plants, radiological medical diagnosis, radiation processing and other fields, extremely high requirements are placed on the personal protection of operators. Among them, neutron radiation is extremely harmful to personal safety, so the development of flexible neutron protection materials has bec...

Claims

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Application Information

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IPC IPC(8): D01F6/78C08G73/10G21F1/10
CPCC08G73/1007C08G73/1042C08G73/1078C08G73/1082D01F6/78G21F1/10
Inventor 张清华赵昕董杰甘锋方玉婷李猛猛
Owner DONGHUA UNIV
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