Preparation method for zinc oxide nanowire-modified PBO fiber

A zinc oxide nanowire and fiber technology, applied in fiber processing, fiber types, textiles and papermaking, etc., can solve the problems of decreased fiber mechanical properties, poor wettability, PBO fiber molecular chain breakage, etc., and achieve the effect of improving roughness.

Active Publication Date: 2014-02-19
HARBIN INST OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to solve the problem that the smooth surface of the existing PBO fiber leads to poor wettability with the matrix resin, and the molecular chain of t

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  • Preparation method for zinc oxide nanowire-modified PBO fiber
  • Preparation method for zinc oxide nanowire-modified PBO fiber
  • Preparation method for zinc oxide nanowire-modified PBO fiber

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specific Embodiment approach 1

[0028] Embodiment 1: This embodiment is a preparation method of zinc oxide nanowire modified PBO fiber, which is specifically completed according to the following steps:

[0029] 1. Activation of PBO fiber: ① First, wind the PBO fiber on a square glass frame, then immerse it in sulfuric acid with a mass fraction of 20% to 80%, and treat it with sulfuric acid at room temperature and at a stirring speed of 50r / min to 200r / min. 1h to 4h to obtain the sulfuric acid-treated fiber; ② Wash the sulfuric acid-treated fiber obtained in step 1 ① with deionized water for 2 to 6 times to obtain the fiber after deionized water washing; ③ Wash the fiber obtained in step 1 ② The fibers washed with deionized water are dried at a temperature of 80°C to 150°C for 30min to 60min to obtain activated PBO fibers;

[0030] 2. Preparation of zinc acetate solution: ①Add zinc acetate dihydrate to absolute ethanol, and stir until zinc acetate dihydrate is completely dissolved at a temperature of 30°C to ...

specific Embodiment approach 2

[0042] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that in step 1 ①, firstly, the PBO fibers are wound on the square glass frame, and then the fibers wound on the square glass frame are immersed in a mass fraction of 40% to 40%. In 80% sulfuric acid, stir at room temperature and at a stirring speed of 100r / min-200r / min for 2h-4h to obtain sulfuric acid-treated fibers. Other steps are the same as in the first embodiment.

specific Embodiment approach 3

[0043] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1 ③, the fiber after washing with deionized water obtained in step 1 ② is dried at a temperature of 100°C to 150°C for 40min to After 60 minutes, activated PBO fibers were obtained. Other steps are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a preparation method for a zinc oxide nanowire-modified PBO fiber, which relates to a modification method for a PBO fiber. The objective of the invention is to overcome the problems of poor wettability on a matrix resin caused by smooth surfaces of PBO fibers and breakage of molecular chains and decrease of mechanical properties of the PBO fibers initiated by elemental oxygen in the prior art. The method comprises the following steps: 1, activating a PBO fiber; 2, preparing a zinc acetate solution; 3, preparing a sodium hydroxide solution; 4, preparing a zinc oxide seed solution; 5, carrying out stirring and drying; and 6, allowing zinc oxide nanowires to grow. The method has the following advantages: 1, the zinc oxide nanowires uniformly and densely grow on the surface of the PBO fiber; 2, interfacial shear strength of a reinforced epoxy resin after modification of the PBO fiber is increased by 20 to 41% compared with that of the reinforced epoxy resin before modification; and 3, in same elemental oxygen exposure time, the tensile strength retention rate of the zinc oxide nanowire-modified PBO fiber is 10 to 21% higher than that of the PBO fiber. With the method, the zinc oxide nanowire-modified PBO fiber is prepared.

Description

technical field [0001] The invention relates to a method for modifying PBO fibers. Background technique [0002] PBO fiber is the abbreviation of poly-p-phenylene benzobisoxazole fiber. As a high-performance aromatic heterocyclic polymer, it is a high-performance fiber prepared by liquid crystal spinning. It has excellent mechanical properties, heat resistance and flame retardancy, and its strength exceeds carbon fiber, Kevlar fiber, etc., and is known as "the super fiber of the 21st century". Due to these excellent comprehensive properties, the composite materials prepared by PBO fibers are widely used in high-tech fields such as aviation, spaceflight and planetary exploration as advanced structural materials. The structure of PBO fiber is as follows: [0003] [0004] The skin-core structure of PBO fiber makes its surface very smooth, inert, and difficult to infiltrate with the resin matrix, resulting in low interfacial bonding strength of composite materials, which s...

Claims

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Application Information

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IPC IPC(8): D06M11/44D06M13/358D06M101/30
Inventor 黄玉东陈磊胡桢程玮璐王芳吴捷刘丽
Owner HARBIN INST OF TECH
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