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High-performance PBO paper-based material and preparation method thereof

A high-performance, paper-based technology, applied in the pulp beating method, synthetic cellulose/non-cellulose material pulp/paper, papermaking, etc., can solve the problems of stress transfer between interfaces, modulus difference, reduction of PBO dielectric properties, Problems such as heat resistance and ablation resistance, to improve stress transfer, improve poor compatibility, and improve interface interaction

Pending Publication Date: 2022-07-26
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The polymers involved are: polyaramid, polyimide, polyphenylene sulfide, polyethersulfone, polyether ether ketone, polyester, polyacrylonitrile, polybenzimidazole, etc. These polymers are based on resin or fiber Filling the inside of the PBO paper in a mixed way strengthens the interaction between the internal interfaces of the paper to a certain extent, but the difference in the chemical structure of the resin and the PBO fiber will cause a difference in modulus, which makes the stress transmission between the interfaces difficult, and The interwetting at the interface will also be adversely affected, which ultimately leads to the inability to maximize the mechanical properties of the PBO paper-based material
In addition, the addition of these polymers will also reduce the dielectric properties, heat resistance and ablation resistance of PBO, which will have an adverse effect on the application of PBO paper

Method used

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  • High-performance PBO paper-based material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of PBO pulp: PBO chopped fibers with a length of 6 mm and a fineness of 2.48 detex were beaten by a Wally beater for 90 min to obtain PBO pulp, and the concentration of the chopped fibers was 1wt%;

[0036] Wet papermaking and sheet forming: Disperse the prepared PBO pulp and chopped fibers in a hydroxyethyl cellulose solution, the chopped fiber content is 40%, the hydroxyethyl cellulose concentration is 0.3 wt%, and the mixture is stirred. After mixing, place it on a rotary screen former to form, and dry at 110 °C after dehydration;

[0037] Preparation of PBO precursor: a certain amount of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane was dissolved in N,N-dimethylacetamide, cooled to 0 °C, and 4.4 times the molar amount was added. Trimethylchlorosilane and pyridine were heated to room temperature for 30min, then cooled to 0°C, and an equimolar amount of 2,2'-bis(4-formylchlorophenyl)hexafluoropropane was added, and the final solution was 20wt%, The re...

Embodiment 2

[0042] Preparation of PBO pulp: PBO chopped fibers with a length of 1 mm and a fineness of 1 detex are beaten by a Wally beater for 20 minutes to obtain PBO pulp, and the concentration of the chopped fibers is 2wt%;

[0043] Wet papermaking and sheet forming: Disperse the prepared PBO pulp and chopped fibers in a hydroxyethyl cellulose solution, the chopped fiber content is 10%, the hydroxyethyl cellulose concentration is 0.5 wt%, and the mixture is stirred. After mixing, place it on a rotary screen former to form, and dry at 110 °C after dehydration;

[0044]Preparation of PBO precursor: Dissolve a certain amount of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane in N,N-dimethylacetamide, cool to 0°C, and add 4 times the molar amount Trimethylchlorosilane and pyridine were heated to room temperature for 30min, then cooled to 0°C, and an equimolar amount of 2,2'-bis(4-formylchlorophenyl)hexafluoropropane was added, and the final solution was 5wt%, -20°C for 24h. After wash...

Embodiment 3

[0049] Preparation of PBO pulp: PBO chopped fibers with a length of 10 mm and a fineness of 3 detex are beaten by a Wally beater for 300 minutes to obtain PBO pulp, and the concentration of the chopped fibers is 0.01wt%;

[0050] Wet papermaking and sheet forming: Disperse the prepared PBO pulp and chopped fibers in a hydroxyethyl cellulose solution, the chopped fiber content is 60%, the hydroxyethyl cellulose concentration is 0.01 wt%, and the mixture is stirred. After mixing, place it on a rotary screen former to shape, and dry at 110 °C after dehydration;

[0051] Preparation of PBO precursor: a certain amount of 2,2-bis(3-amino-4-hydroxyphenyl)hexafluoropropane was dissolved in N,N-dimethylacetamide, cooled to 0 °C, and 4.8 times the molar amount was added. The obtained trimethylchlorosilane and pyridine were heated to room temperature for 30 min, then cooled to 0 °C, and an equimolar amount of terephthaloyl chloride was added, the final solution was 30 wt%, and the reacti...

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Abstract

The invention discloses a high-performance PBO paper-based material and a preparation method thereof. The method comprises the following steps: dipping PBO raw paper in a PBO precursor solution, drying, and then carrying out hot pressing and heat treatment to obtain the high-performance PBO paper-based material. The PBO and the PBO derivative are used for enhancing the PBO paper for the first time. The similarity of the chemical structure improves the problem of poor compatibility between the traditional resin and the PBO fiber, and the interface interaction is improved; the stress transfer between interfaces is also improved due to similar moduli, so that the PBO paper-based material with excellent performance can be prepared, and the application requirements in the fields of aerospace, national defense and military, electricity, transportation and the like can be met.

Description

technical field [0001] The invention belongs to the field of special paper, in particular to a high-performance PBO paper-based material and a preparation method thereof. Background technique [0002] At present, with the advancement of science and technology, the demand for high-strength, high-modulus, high-temperature-resistant and lightweight materials in cutting-edge fields such as defense industry, aerospace, and transportation has been increasing. Aramid fibers and PBO fibers are representatives of such high-performance materials. Due to the early development of aramid paper, aramid paper-based materials have been widely used in the fields of national defense, aerospace, transportation and electric power, and have mature production processes. Compared with the para-aramid fiber molecular chain that approximates the rigid extended chain conformation, the PBO fiber molecular chain exhibits the rigid extended chain conformation, which makes it have more superior mechanic...

Claims

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Application Information

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IPC IPC(8): D21D1/02D21H13/26D21H25/06
CPCD21D1/02D21H13/26D21H25/06
Inventor 高毓甫李春成郑柳春肖耀南
Owner INST OF CHEM CHINESE ACAD OF SCI
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