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Preparation method for binary grafted modified PBO fiber

A graft modification and fiber technology, which is applied in the field of PBO fiber preparation, can solve the problems of decreased fiber mechanical properties, poor wettability of PBO fibers, molecular chain breakage, etc., and achieves the effect of increasing the contact area.

Active Publication Date: 2014-05-28
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the surface of the existing PBO fiber is inert, which leads to poor wettability with the matrix resin, and the molecular chain of the PBO fiber is broken by atomic oxygen, and the mechanical properties of the fiber are reduced. A binary APTMS and graphene oxide is provided. Preparation method of grafted PBO fiber

Method used

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  • Preparation method for binary grafted modified PBO fiber
  • Preparation method for binary grafted modified PBO fiber
  • Preparation method for binary grafted modified PBO fiber

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specific Embodiment approach 1

[0020] Specific embodiment one: the preparation method of the binary graft modified PBO fiber of this embodiment is realized according to the following steps:

[0021] 1. Graphene oxide functionalization treatment: Add 10ml~100ml thionyl chloride and 1ml~5ml N,N-dimethylformamide into a single-necked flask, then pour 0.1g~0.4g graphene oxide powder, and Ultrasonic oscillation for 0.5h to 2h, then heating and reflux under nitrogen atmosphere for 12h to 72h, and finally vacuum distillation until the solvent is completely removed to obtain functionalized graphene oxide;

[0022] 2. PBO fiber activation treatment: Wrap the PBO fiber on a square glass frame, immerse it in sulfuric acid solution, stir at room temperature for 1h~4h, take it out and wash it with deionized water for 1~7 times, and finally at 80℃~ Dry at 150°C for 10 minutes to 60 minutes to obtain activated PBO fibers;

[0023] 3. Hydroxyl functionalization treatment of PBO fiber: add 0.02g~0.08g activated PBO fiber t...

specific Embodiment approach 2

[0029] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the vacuum distillation described in step 1 is carried out at a temperature of 40°C to 70°C. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the mass fraction of the sulfuric acid solution described in step 2 is 20% to 80%. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention relates to a preparation method for PBO fiber, in particular to a preparation method for binary grafted modified PBO fiber, and aims to solve the problem that the conventional PBO fiber has poor infiltration with matrix resin as the surface is inert and the fiber mechanical property is reduced as PBO fiber molecular chains break due to elemental oxygen. The preparation method comprises the following steps: 1, functionally processing graphene oxide; 2, performing activating treatment on PBO fiber; adding the PBO fiber into a lithium aluminum hydride-diethyl ether saturated solution to be subjected to hydroxyl functional processing; 4, grafting APTMS on the surface of the PBO fiber; 5, binarily grafting the graphene oxide on the surface of the PBO fiber. According to the invention, both the APTMS and the graphene oxide are grafted on the surface of the PBO fiber through a chemical grafting method, so that the infiltration of the PBO fiber is improved, and the binary grafted PBO fiber can keep higher tensile strength under the impact of elemental oxygen. The preparation method is mainly applied to the preparation of PBO fiber.

Description

technical field [0001] The invention relates to a preparation method of PBO fiber. Background technique [0002] PBO (poly-p-phenylene benzobisoxazole) fiber is a high-performance fiber prepared by spinning liquid crystals. It has excellent mechanical properties, heat resistance and flame retardancy, and is known as "the super fiber of the 21st century." ". However, the sheath-core structure of PBO fibers makes its surface inert and has poor wettability with the resin matrix, resulting in low interfacial bonding strength of composite materials, which seriously restricts its application in composite materials. [0003] The structure of PBO fiber is as follows: [0004] [0005] In the low-earth orbit space environment at an altitude of 200-700km from the earth's surface, there are factors such as atomic oxygen, ultraviolet radiation, electrons, protons, micrometeorites, and space debris. Among them, atomic oxygen is undoubtedly the most important and dangerous factor. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06M13/513D06M11/74D06M11/55D06M11/01C08J5/06C08L63/00D06M101/30
Inventor 黄玉东陈磊刘丽程玮璐尉枫胡桢王芳
Owner HARBIN INST OF TECH
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